mirror of
https://git.postgresql.org/git/postgresql.git
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5512 lines
134 KiB
C
5512 lines
134 KiB
C
/*--------------------------------------------------------------------
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* guc.c
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*
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* Support for grand unified configuration scheme, including SET
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* command, configuration file, and command line options.
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* See src/backend/utils/misc/README for more information.
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*
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*
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* Copyright (c) 2000-2003, PostgreSQL Global Development Group
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* Written by Peter Eisentraut <peter_e@gmx.net>.
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.230 2004/08/08 20:17:36 tgl Exp $
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*
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*--------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include <ctype.h>
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#include <float.h>
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#include <limits.h>
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#include <unistd.h>
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#include "utils/guc.h"
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#include "utils/guc_tables.h"
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#include "catalog/namespace.h"
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#include "catalog/pg_type.h"
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#include "commands/async.h"
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#include "commands/variable.h"
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#include "commands/vacuum.h"
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#include "executor/executor.h"
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#include "fmgr.h"
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#include "funcapi.h"
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#include "libpq/auth.h"
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#include "libpq/pqcomm.h"
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#include "libpq/pqformat.h"
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#include "mb/pg_wchar.h"
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#include "miscadmin.h"
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#include "optimizer/cost.h"
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#include "optimizer/geqo.h"
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#include "optimizer/paths.h"
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#include "optimizer/prep.h"
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#include "parser/parse_expr.h"
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#include "parser/parse_relation.h"
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#include "postmaster/bgwriter.h"
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#include "postmaster/syslogger.h"
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#include "postmaster/postmaster.h"
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#include "storage/bufmgr.h"
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#include "storage/fd.h"
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#include "storage/freespace.h"
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#include "storage/lock.h"
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#include "storage/proc.h"
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#include "tcop/tcopprot.h"
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#include "utils/array.h"
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#include "utils/builtins.h"
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#include "utils/memutils.h"
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#include "utils/pg_locale.h"
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#include "pgstat.h"
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char *guc_pgdata;
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char *guc_hbafile;
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char *guc_identfile;
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char *external_pidfile;
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char *user_pgconfig = NULL;
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bool user_pgconfig_is_dir = false;
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#ifndef PG_KRB_SRVTAB
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#define PG_KRB_SRVTAB ""
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#endif
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#ifdef EXEC_BACKEND
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#define CONFIG_EXEC_PARAMS "global/config_exec_params"
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#endif
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/* XXX these should appear in other modules' header files */
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extern bool Log_disconnections;
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extern DLLIMPORT bool check_function_bodies;
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extern int CommitDelay;
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extern int CommitSiblings;
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extern int DebugSharedBuffers;
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static const char *assign_log_destination(const char *value,
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bool doit, GucSource source);
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#ifdef HAVE_SYSLOG
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extern char *Syslog_facility;
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extern char *Syslog_ident;
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static const char *assign_facility(const char *facility,
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bool doit, GucSource source);
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#endif
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static const char *assign_defaultxactisolevel(const char *newval, bool doit,
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GucSource source);
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static const char *assign_log_min_messages(const char *newval, bool doit,
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GucSource source);
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static const char *assign_client_min_messages(const char *newval,
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bool doit, GucSource source);
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static const char *assign_min_error_statement(const char *newval, bool doit,
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GucSource source);
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static const char *assign_msglvl(int *var, const char *newval, bool doit,
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GucSource source);
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static const char *assign_log_error_verbosity(const char *newval, bool doit,
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GucSource source);
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static const char *assign_log_statement(const char *newval, bool doit,
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GucSource source);
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static const char *assign_log_stmtlvl(int *var, const char *newval,
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bool doit, GucSource source);
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static bool assign_phony_autocommit(bool newval, bool doit, GucSource source);
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static const char *assign_custom_variable_classes(const char *newval, bool doit,
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GucSource source);
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static bool assign_stage_log_stats(bool newval, bool doit, GucSource source);
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static bool assign_log_stats(bool newval, bool doit, GucSource source);
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static bool assign_transaction_read_only(bool newval, bool doit, GucSource source);
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static const char *assign_canonical_path(const char *newval, bool doit, GucSource source);
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static void ReadConfigFile(char *filename, GucContext context);
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/*
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* Debugging options
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*/
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#ifdef USE_ASSERT_CHECKING
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bool assert_enabled = true;
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#endif
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bool log_duration = false;
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bool Debug_print_plan = false;
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bool Debug_print_parse = false;
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bool Debug_print_rewritten = false;
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bool Debug_pretty_print = false;
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bool Explain_pretty_print = true;
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bool log_parser_stats = false;
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bool log_planner_stats = false;
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bool log_executor_stats = false;
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bool log_statement_stats = false; /* this is sort of all
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* three above together */
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bool log_btree_build_stats = false;
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bool SQL_inheritance = true;
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bool Australian_timezones = false;
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bool Password_encryption = true;
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bool default_with_oids = true;
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int log_min_error_statement = PANIC;
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int log_min_messages = NOTICE;
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int client_min_messages = NOTICE;
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int log_min_duration_statement = -1;
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/*
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* These variables are all dummies that don't do anything, except in some
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* cases provide the value for SHOW to display. The real state is elsewhere
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* and is kept in sync by assign_hooks.
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*/
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static char *client_min_messages_str;
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static char *log_min_messages_str;
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static char *log_error_verbosity_str;
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static char *log_statement_str;
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static char *log_min_error_statement_str;
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static char *log_destination_string;
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static bool phony_autocommit;
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static bool session_auth_is_superuser;
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static double phony_random_seed;
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static char *client_encoding_string;
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static char *datestyle_string;
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static char *default_iso_level_string;
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static char *locale_collate;
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static char *locale_ctype;
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static char *regex_flavor_string;
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static char *server_encoding_string;
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static char *server_version_string;
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static char *session_authorization_string;
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static char *timezone_string;
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static char *XactIsoLevel_string;
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static char *custom_variable_classes;
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static int max_function_args;
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static int max_index_keys;
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static int max_identifier_length;
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static int block_size;
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static bool integer_datetimes;
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/*
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* Displayable names for context types (enum GucContext)
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*
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* Note: these strings are deliberately not localized.
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*/
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const char *const GucContext_Names[] =
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{
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/* PGC_INTERNAL */ "internal",
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/* PGC_POSTMASTER */ "postmaster",
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/* PGC_SIGHUP */ "sighup",
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/* PGC_BACKEND */ "backend",
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/* PGC_SUSET */ "superuser",
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/* PGC_USERLIMIT */ "userlimit",
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/* PGC_USERSET */ "user"
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};
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/*
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* Displayable names for source types (enum GucSource)
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*
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* Note: these strings are deliberately not localized.
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*/
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const char *const GucSource_Names[] =
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{
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/* PGC_S_DEFAULT */ "default",
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/* PGC_S_ENV_VAR */ "environment variable",
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/* PGC_S_FILE */ "configuration file",
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/* PGC_S_ARGV */ "command line",
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/* PGC_S_UNPRIVILEGED */ "unprivileged",
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/* PGC_S_DATABASE */ "database",
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/* PGC_S_USER */ "user",
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/* PGC_S_CLIENT */ "client",
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/* PGC_S_OVERRIDE */ "override",
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/* PGC_S_INTERACTIVE */ "interactive",
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/* PGC_S_TEST */ "test",
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/* PGC_S_SESSION */ "session"
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};
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/*
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* Displayable names for the groupings defined in enum config_group
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*/
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const char *const config_group_names[] =
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{
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/* UNGROUPED */
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gettext_noop("Ungrouped"),
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/* CONN_AUTH */
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gettext_noop("Connections and Authentication"),
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/* CONN_AUTH_SETTINGS */
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gettext_noop("Connections and Authentication / Connection Settings"),
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/* CONN_AUTH_SECURITY */
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gettext_noop("Connections and Authentication / Security and Authentication"),
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/* RESOURCES */
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gettext_noop("Resource Usage"),
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/* RESOURCES_MEM */
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gettext_noop("Resource Usage / Memory"),
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/* RESOURCES_FSM */
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gettext_noop("Resource Usage / Free Space Map"),
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/* RESOURCES_KERNEL */
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gettext_noop("Resource Usage / Kernel Resources"),
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/* WAL */
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gettext_noop("Write-Ahead Log"),
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/* WAL_SETTINGS */
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gettext_noop("Write-Ahead Log / Settings"),
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/* WAL_CHECKPOINTS */
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gettext_noop("Write-Ahead Log / Checkpoints"),
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/* QUERY_TUNING */
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gettext_noop("Query Tuning"),
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/* QUERY_TUNING_METHOD */
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gettext_noop("Query Tuning / Planner Method Configuration"),
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/* QUERY_TUNING_COST */
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gettext_noop("Query Tuning / Planner Cost Constants"),
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/* QUERY_TUNING_GEQO */
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gettext_noop("Query Tuning / Genetic Query Optimizer"),
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/* QUERY_TUNING_OTHER */
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gettext_noop("Query Tuning / Other Planner Options"),
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/* LOGGING */
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gettext_noop("Reporting and Logging"),
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/* LOGGING_WHERE */
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gettext_noop("Reporting and Logging / Where to Log"),
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/* LOGGING_WHEN */
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gettext_noop("Reporting and Logging / When to Log"),
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/* LOGGING_WHAT */
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gettext_noop("Reporting and Logging / What to Log"),
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/* STATS */
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gettext_noop("Statistics"),
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/* STATS_MONITORING */
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gettext_noop("Statistics / Monitoring"),
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/* STATS_COLLECTOR */
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gettext_noop("Statistics / Query and Index Statistics Collector"),
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/* CLIENT_CONN */
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gettext_noop("Client Connection Defaults"),
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/* CLIENT_CONN_STATEMENT */
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gettext_noop("Client Connection Defaults / Statement Behavior"),
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/* CLIENT_CONN_LOCALE */
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gettext_noop("Client Connection Defaults / Locale and Formatting"),
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/* CLIENT_CONN_OTHER */
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gettext_noop("Client Connection Defaults / Other Defaults"),
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/* LOCK_MANAGEMENT */
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gettext_noop("Lock Management"),
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/* COMPAT_OPTIONS */
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gettext_noop("Version and Platform Compatibility"),
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/* COMPAT_OPTIONS_PREVIOUS */
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gettext_noop("Version and Platform Compatibility / Previous PostgreSQL Versions"),
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/* COMPAT_OPTIONS_CLIENT */
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gettext_noop("Version and Platform Compatibility / Other Platforms and Clients"),
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/* DEVELOPER_OPTIONS */
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gettext_noop("Developer Options"),
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/* COMPILE_OPTIONS */
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gettext_noop("Compiled-in Options"),
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/* help_config wants this array to be null-terminated */
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NULL
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};
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/*
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* Displayable names for GUC variable types (enum config_type)
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*
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* Note: these strings are deliberately not localized.
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*/
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const char *const config_type_names[] =
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{
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/* PGC_BOOL */ "bool",
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/* PGC_INT */ "integer",
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/* PGC_REAL */ "real",
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/* PGC_STRING */ "string"
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};
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/*
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* Contents of GUC tables
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*
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* See src/backend/utils/misc/README for design notes.
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*
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* TO ADD AN OPTION:
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*
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* 1. Declare a global variable of type bool, int, double, or char*
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* and make use of it.
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*
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* 2. Decide at what times it's safe to set the option. See guc.h for
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* details.
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*
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* 3. Decide on a name, a default value, upper and lower bounds (if
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* applicable), etc.
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*
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* 4. Add a record below.
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*
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* 5. Add it to src/backend/utils/misc/postgresql.conf.sample, if
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* appropriate
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*
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* 6. Add it to src/bin/psql/tab-complete.c, if it's a USERSET option.
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*
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* 7. Don't forget to document the option.
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*
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* 8. If it's a new GUC_LIST option you must edit pg_dumpall.c to ensure
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* it is not single quoted at dump time.
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*/
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/******** option records follow ********/
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static struct config_bool ConfigureNamesBool[] =
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{
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{
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{"enable_seqscan", PGC_USERSET, QUERY_TUNING_METHOD,
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gettext_noop("Enables the planner's use of sequential-scan plans."),
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NULL
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},
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&enable_seqscan,
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true, NULL, NULL
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},
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{
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{"enable_indexscan", PGC_USERSET, QUERY_TUNING_METHOD,
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gettext_noop("Enables the planner's use of index-scan plans."),
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NULL
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},
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&enable_indexscan,
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true, NULL, NULL
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},
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{
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{"enable_tidscan", PGC_USERSET, QUERY_TUNING_METHOD,
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gettext_noop("Enables the planner's use of TID scan plans."),
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NULL
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},
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&enable_tidscan,
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true, NULL, NULL
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},
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{
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{"enable_sort", PGC_USERSET, QUERY_TUNING_METHOD,
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gettext_noop("Enables the planner's use of explicit sort steps."),
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NULL
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},
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&enable_sort,
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true, NULL, NULL
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},
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{
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{"enable_hashagg", PGC_USERSET, QUERY_TUNING_METHOD,
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gettext_noop("Enables the planner's use of hashed aggregation plans."),
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NULL
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},
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&enable_hashagg,
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true, NULL, NULL
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},
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{
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{"enable_nestloop", PGC_USERSET, QUERY_TUNING_METHOD,
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gettext_noop("Enables the planner's use of nested-loop join plans."),
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NULL
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},
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&enable_nestloop,
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true, NULL, NULL
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},
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{
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{"enable_mergejoin", PGC_USERSET, QUERY_TUNING_METHOD,
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gettext_noop("Enables the planner's use of merge join plans."),
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NULL
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},
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&enable_mergejoin,
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true, NULL, NULL
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},
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{
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{"enable_hashjoin", PGC_USERSET, QUERY_TUNING_METHOD,
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gettext_noop("Enables the planner's use of hash join plans."),
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NULL
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},
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&enable_hashjoin,
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true, NULL, NULL
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},
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{
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{"geqo", PGC_USERSET, QUERY_TUNING_GEQO,
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gettext_noop("Enables genetic query optimization."),
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gettext_noop("This algorithm attempts to do planning without "
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"exhaustive searching.")
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},
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&enable_geqo,
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true, NULL, NULL
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},
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{
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/* Not for general use --- used by SET SESSION AUTHORIZATION */
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{"is_superuser", PGC_INTERNAL, UNGROUPED,
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gettext_noop("Shows whether the current user is a superuser."),
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NULL,
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GUC_REPORT | GUC_NO_SHOW_ALL | GUC_NO_RESET_ALL | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
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},
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&session_auth_is_superuser,
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false, NULL, NULL
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},
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{
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{"ssl", PGC_POSTMASTER, CONN_AUTH_SECURITY,
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gettext_noop("Enables SSL connections."),
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NULL
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},
|
|
&EnableSSL,
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false, NULL, NULL
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},
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{
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{"fsync", PGC_SIGHUP, WAL_SETTINGS,
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gettext_noop("Forces synchronization of updates to disk."),
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gettext_noop("The server will use the fsync() system call in several places to make "
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"sure that updates are physically written to disk. This insures "
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"that a database cluster will recover to a consistent state after "
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|
"an operating system or hardware crash.")
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},
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&enableFsync,
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true, NULL, NULL
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},
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{
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{"zero_damaged_pages", PGC_SUSET, DEVELOPER_OPTIONS,
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gettext_noop("Continues processing past damaged page headers."),
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gettext_noop("Detection of a damaged page header normally causes PostgreSQL to "
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|
"report an error, aborting the current transaction. Setting "
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|
"zero_damaged_pages to true causes the system to instead report a "
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"warning, zero out the damaged page, and continue processing. This "
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"behavior will destroy data, namely all the rows on the damaged page."),
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GUC_NOT_IN_SAMPLE
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},
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|
&zero_damaged_pages,
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false, NULL, NULL
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},
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{
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{"silent_mode", PGC_POSTMASTER, LOGGING_WHEN,
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gettext_noop("Runs the server silently."),
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gettext_noop("If this parameter is set, the server will automatically run in the "
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"background and any controlling terminals are dissociated.")
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},
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&SilentMode,
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false, NULL, NULL
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},
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{
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{"log_connections", PGC_BACKEND, LOGGING_WHAT,
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gettext_noop("Logs each successful connection."),
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NULL
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},
|
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&Log_connections,
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false, NULL, NULL
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},
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{
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{"log_disconnections", PGC_BACKEND, LOGGING_WHAT,
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|
gettext_noop("Logs end of a session, including duration"),
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NULL
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},
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|
&Log_disconnections,
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false, NULL, NULL
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},
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|
|
#ifdef USE_ASSERT_CHECKING
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|
{
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{"debug_assertions", PGC_USERSET, DEVELOPER_OPTIONS,
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gettext_noop("Turns on various assertion checks."),
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|
gettext_noop("This is a debugging aid."),
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GUC_NOT_IN_SAMPLE
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},
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&assert_enabled,
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true, NULL, NULL
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},
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#endif
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|
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{
|
|
/* currently undocumented, so don't show in SHOW ALL */
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|
{"exit_on_error", PGC_USERSET, UNGROUPED,
|
|
gettext_noop("no description available"),
|
|
NULL,
|
|
GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE
|
|
},
|
|
&ExitOnAnyError,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"log_duration", PGC_USERLIMIT, LOGGING_WHAT,
|
|
gettext_noop("Logs the duration each completed SQL statement."),
|
|
NULL
|
|
},
|
|
&log_duration,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"debug_print_parse", PGC_USERSET, LOGGING_WHAT,
|
|
gettext_noop("Prints the parse tree to the server log."),
|
|
NULL
|
|
},
|
|
&Debug_print_parse,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"debug_print_rewritten", PGC_USERSET, LOGGING_WHAT,
|
|
gettext_noop("Prints the parse tree after rewriting to server log."),
|
|
NULL
|
|
},
|
|
&Debug_print_rewritten,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"debug_print_plan", PGC_USERSET, LOGGING_WHAT,
|
|
gettext_noop("Prints the execution plan to server log."),
|
|
NULL
|
|
},
|
|
&Debug_print_plan,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"debug_pretty_print", PGC_USERSET, LOGGING_WHAT,
|
|
gettext_noop("Indents parse and plan tree displays."),
|
|
NULL
|
|
},
|
|
&Debug_pretty_print,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"log_parser_stats", PGC_USERLIMIT, STATS_MONITORING,
|
|
gettext_noop("Writes parser performance statistics to the server log."),
|
|
NULL
|
|
},
|
|
&log_parser_stats,
|
|
false, assign_stage_log_stats, NULL
|
|
},
|
|
{
|
|
{"log_planner_stats", PGC_USERLIMIT, STATS_MONITORING,
|
|
gettext_noop("Writes planner performance statistics to the server log."),
|
|
NULL
|
|
},
|
|
&log_planner_stats,
|
|
false, assign_stage_log_stats, NULL
|
|
},
|
|
{
|
|
{"log_executor_stats", PGC_USERLIMIT, STATS_MONITORING,
|
|
gettext_noop("Writes executor performance statistics to the server log."),
|
|
NULL
|
|
},
|
|
&log_executor_stats,
|
|
false, assign_stage_log_stats, NULL
|
|
},
|
|
{
|
|
{"log_statement_stats", PGC_USERLIMIT, STATS_MONITORING,
|
|
gettext_noop("Writes cumulative performance statistics to the server log."),
|
|
NULL
|
|
},
|
|
&log_statement_stats,
|
|
false, assign_log_stats, NULL
|
|
},
|
|
#ifdef BTREE_BUILD_STATS
|
|
{
|
|
{"log_btree_build_stats", PGC_SUSET, DEVELOPER_OPTIONS,
|
|
gettext_noop("no description available"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE
|
|
},
|
|
&log_btree_build_stats,
|
|
false, NULL, NULL
|
|
},
|
|
#endif
|
|
|
|
{
|
|
{"explain_pretty_print", PGC_USERSET, CLIENT_CONN_OTHER,
|
|
gettext_noop("Uses the indented output format for EXPLAIN VERBOSE."),
|
|
NULL
|
|
},
|
|
&Explain_pretty_print,
|
|
true, NULL, NULL
|
|
},
|
|
{
|
|
{"stats_start_collector", PGC_POSTMASTER, STATS_COLLECTOR,
|
|
gettext_noop("Starts the server statistics-collection subprocess."),
|
|
NULL
|
|
},
|
|
&pgstat_collect_startcollector,
|
|
true, NULL, NULL
|
|
},
|
|
{
|
|
{"stats_reset_on_server_start", PGC_POSTMASTER, STATS_COLLECTOR,
|
|
gettext_noop("Zeroes collected statistics on server restart."),
|
|
NULL
|
|
},
|
|
&pgstat_collect_resetonpmstart,
|
|
true, NULL, NULL
|
|
},
|
|
{
|
|
{"stats_command_string", PGC_SUSET, STATS_COLLECTOR,
|
|
gettext_noop("Collects statistics about executing commands."),
|
|
gettext_noop("Enables the collection of statistics on the currently "
|
|
"executing command of each session, along with the time "
|
|
"at which that command began execution.")
|
|
},
|
|
&pgstat_collect_querystring,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"stats_row_level", PGC_SUSET, STATS_COLLECTOR,
|
|
gettext_noop("Collects row-level statistics on database activity."),
|
|
NULL
|
|
},
|
|
&pgstat_collect_tuplelevel,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"stats_block_level", PGC_SUSET, STATS_COLLECTOR,
|
|
gettext_noop("Collects block-level statistics on database activity."),
|
|
NULL
|
|
},
|
|
&pgstat_collect_blocklevel,
|
|
false, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"trace_notify", PGC_USERSET, DEVELOPER_OPTIONS,
|
|
gettext_noop("Generates debugging output for LISTEN and NOTIFY."),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE
|
|
},
|
|
&Trace_notify,
|
|
false, NULL, NULL
|
|
},
|
|
|
|
#ifdef LOCK_DEBUG
|
|
{
|
|
{"trace_locks", PGC_SUSET, DEVELOPER_OPTIONS,
|
|
gettext_noop("no description available"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE
|
|
},
|
|
&Trace_locks,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"trace_userlocks", PGC_SUSET, DEVELOPER_OPTIONS,
|
|
gettext_noop("no description available"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE
|
|
},
|
|
&Trace_userlocks,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"trace_lwlocks", PGC_SUSET, DEVELOPER_OPTIONS,
|
|
gettext_noop("no description available"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE
|
|
},
|
|
&Trace_lwlocks,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"debug_deadlocks", PGC_SUSET, DEVELOPER_OPTIONS,
|
|
gettext_noop("no description available"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE
|
|
},
|
|
&Debug_deadlocks,
|
|
false, NULL, NULL
|
|
},
|
|
#endif
|
|
|
|
{
|
|
{"log_hostname", PGC_SIGHUP, LOGGING_WHAT,
|
|
gettext_noop("Logs the host name in the connection logs."),
|
|
gettext_noop("By default, connection logs only show the IP address "
|
|
"of the connecting host. If you want them to show the host name you "
|
|
"can turn this on, but depending on your host name resolution "
|
|
"setup it might impose a non-negligible performance penalty.")
|
|
},
|
|
&log_hostname,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"sql_inheritance", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
|
|
gettext_noop("Causes subtables to be included by default in various commands."),
|
|
NULL
|
|
},
|
|
&SQL_inheritance,
|
|
true, NULL, NULL
|
|
},
|
|
{
|
|
{"australian_timezones", PGC_USERSET, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Interprets ACST, CST, EST, and SAT as Australian time zones."),
|
|
gettext_noop("Otherwise they are interpreted as North/South American "
|
|
"time zones and Saturday.")
|
|
},
|
|
&Australian_timezones,
|
|
false, ClearDateCache, NULL
|
|
},
|
|
{
|
|
{"password_encryption", PGC_USERSET, CONN_AUTH_SECURITY,
|
|
gettext_noop("Encrypt passwords."),
|
|
gettext_noop("When a password is specified in CREATE USER or "
|
|
"ALTER USER without writing either ENCRYPTED or UNENCRYPTED, "
|
|
"this parameter determines whether the password is to be encrypted.")
|
|
},
|
|
&Password_encryption,
|
|
true, NULL, NULL
|
|
},
|
|
{
|
|
{"transform_null_equals", PGC_USERSET, COMPAT_OPTIONS_CLIENT,
|
|
gettext_noop("Treats \"expr=NULL\" as \"expr IS NULL\"."),
|
|
gettext_noop("When turned on, expressions of the form expr = NULL "
|
|
"(or NULL = expr) are treated as expr IS NULL, that is, they "
|
|
"return true if expr evaluates to the null value, and false "
|
|
"otherwise. The correct behavior of expr = NULL is to always "
|
|
"return null (unknown).")
|
|
},
|
|
&Transform_null_equals,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"db_user_namespace", PGC_SIGHUP, CONN_AUTH_SECURITY,
|
|
gettext_noop("Enables per-database user names."),
|
|
NULL
|
|
},
|
|
&Db_user_namespace,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
/* only here for backwards compatibility */
|
|
{"autocommit", PGC_USERSET, CLIENT_CONN_STATEMENT,
|
|
gettext_noop("This parameter doesn't do anything."),
|
|
gettext_noop("It's just here so that we won't choke on SET AUTOCOMMIT TO ON from 7.3-vintage clients."),
|
|
GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE
|
|
},
|
|
&phony_autocommit,
|
|
true, assign_phony_autocommit, NULL
|
|
},
|
|
{
|
|
{"default_transaction_read_only", PGC_USERSET, CLIENT_CONN_STATEMENT,
|
|
gettext_noop("Sets the default read-only status of new transactions."),
|
|
NULL
|
|
},
|
|
&DefaultXactReadOnly,
|
|
false, NULL, NULL
|
|
},
|
|
{
|
|
{"transaction_read_only", PGC_USERSET, CLIENT_CONN_STATEMENT,
|
|
gettext_noop("Sets the current transaction's read-only status."),
|
|
NULL,
|
|
GUC_NO_RESET_ALL | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&XactReadOnly,
|
|
false, assign_transaction_read_only, NULL
|
|
},
|
|
{
|
|
{"add_missing_from", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
|
|
gettext_noop("Automatically adds missing table references to FROM clauses."),
|
|
NULL
|
|
},
|
|
&add_missing_from,
|
|
true, NULL, NULL
|
|
},
|
|
{
|
|
{"check_function_bodies", PGC_USERSET, CLIENT_CONN_STATEMENT,
|
|
gettext_noop("Check function bodies during CREATE FUNCTION."),
|
|
NULL
|
|
},
|
|
&check_function_bodies,
|
|
true, NULL, NULL
|
|
},
|
|
{
|
|
{"default_with_oids", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
|
|
gettext_noop("By default, newly-created tables should have OIDs"),
|
|
NULL
|
|
},
|
|
&default_with_oids,
|
|
true, NULL, NULL
|
|
},
|
|
{
|
|
{"redirect_stderr", PGC_POSTMASTER, LOGGING_WHERE,
|
|
gettext_noop("Start a subprocess to capture stderr output into log files"),
|
|
NULL
|
|
},
|
|
&Redirect_stderr,
|
|
false, NULL, NULL
|
|
},
|
|
|
|
#ifdef WAL_DEBUG
|
|
{
|
|
{"wal_debug", PGC_SUSET, DEVELOPER_OPTIONS,
|
|
gettext_noop("Emit WAL-related debugging output."),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE
|
|
},
|
|
&XLOG_DEBUG,
|
|
false, NULL, NULL
|
|
},
|
|
#endif
|
|
|
|
{
|
|
{"integer_datetimes", PGC_INTERNAL, COMPILE_OPTIONS,
|
|
gettext_noop("Datetimes are integer based"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&integer_datetimes,
|
|
#ifdef HAVE_INT64_TIMESTAMP
|
|
true, NULL, NULL
|
|
#else
|
|
false, NULL, NULL
|
|
#endif
|
|
},
|
|
|
|
/* End-of-list marker */
|
|
{
|
|
{NULL, 0, 0, NULL, NULL}, NULL, false, NULL, NULL
|
|
}
|
|
};
|
|
|
|
|
|
static struct config_int ConfigureNamesInt[] =
|
|
{
|
|
{
|
|
{"default_statistics_target", PGC_USERSET, QUERY_TUNING_OTHER,
|
|
gettext_noop("Sets the default statistics target."),
|
|
gettext_noop("This applies to table columns that have not had a "
|
|
"column-specific target set via ALTER TABLE SET STATISTICS.")
|
|
},
|
|
&default_statistics_target,
|
|
10, 1, 1000, NULL, NULL
|
|
},
|
|
{
|
|
{"from_collapse_limit", PGC_USERSET, QUERY_TUNING_OTHER,
|
|
gettext_noop("Sets the FROM-list size beyond which subqueries are not "
|
|
"collapsed."),
|
|
gettext_noop("The planner will merge subqueries into upper "
|
|
"queries if the resulting FROM list would have no more than "
|
|
"this many items.")
|
|
},
|
|
&from_collapse_limit,
|
|
8, 1, INT_MAX, NULL, NULL
|
|
},
|
|
{
|
|
{"join_collapse_limit", PGC_USERSET, QUERY_TUNING_OTHER,
|
|
gettext_noop("Sets the FROM-list size beyond which JOIN constructs are not "
|
|
"flattened."),
|
|
gettext_noop("The planner will flatten explicit inner JOIN "
|
|
"constructs into lists of FROM items whenever a list of no more "
|
|
"than this many items would result.")
|
|
},
|
|
&join_collapse_limit,
|
|
8, 1, INT_MAX, NULL, NULL
|
|
},
|
|
{
|
|
{"geqo_threshold", PGC_USERSET, QUERY_TUNING_GEQO,
|
|
gettext_noop("Sets the threshold of FROM items beyond which GEQO is used."),
|
|
NULL
|
|
},
|
|
&geqo_threshold,
|
|
12, 2, INT_MAX, NULL, NULL
|
|
},
|
|
{
|
|
{"geqo_effort", PGC_USERSET, QUERY_TUNING_GEQO,
|
|
gettext_noop("GEQO: effort is used to set the default for other GEQO parameters."),
|
|
NULL
|
|
},
|
|
&Geqo_effort,
|
|
DEFAULT_GEQO_EFFORT, MIN_GEQO_EFFORT, MAX_GEQO_EFFORT, NULL, NULL
|
|
},
|
|
{
|
|
{"geqo_pool_size", PGC_USERSET, QUERY_TUNING_GEQO,
|
|
gettext_noop("GEQO: number of individuals in the population."),
|
|
gettext_noop("Zero selects a suitable default value.")
|
|
},
|
|
&Geqo_pool_size,
|
|
0, 0, INT_MAX, NULL, NULL
|
|
},
|
|
{
|
|
{"geqo_generations", PGC_USERSET, QUERY_TUNING_GEQO,
|
|
gettext_noop("GEQO: number of iterations of the algorithm."),
|
|
gettext_noop("Zero selects a suitable default value.")
|
|
},
|
|
&Geqo_generations,
|
|
0, 0, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"deadlock_timeout", PGC_SIGHUP, LOCK_MANAGEMENT,
|
|
gettext_noop("The time in milliseconds to wait on lock before checking for deadlock."),
|
|
NULL
|
|
},
|
|
&DeadlockTimeout,
|
|
1000, 0, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
/*
|
|
* Note: There is some postprocessing done in PostmasterMain() to make
|
|
* sure the buffers are at least twice the number of backends, so the
|
|
* constraints here are partially unused. Similarly, the superuser
|
|
* reserved number is checked to ensure it is less than the max
|
|
* backends number.
|
|
*/
|
|
{
|
|
{"max_connections", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
|
|
gettext_noop("Sets the maximum number of concurrent connections."),
|
|
NULL
|
|
},
|
|
&MaxBackends,
|
|
100, 1, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"superuser_reserved_connections", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
|
|
gettext_noop("Sets the number of connection slots reserved for superusers."),
|
|
NULL
|
|
},
|
|
&ReservedBackends,
|
|
2, 0, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"shared_buffers", PGC_POSTMASTER, RESOURCES_MEM,
|
|
gettext_noop("Sets the number of shared memory buffers used by the server."),
|
|
NULL
|
|
},
|
|
&NBuffers,
|
|
1000, 16, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"port", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
|
|
gettext_noop("Sets the TCP port the server listens on."),
|
|
NULL
|
|
},
|
|
&PostPortNumber,
|
|
DEF_PGPORT, 1, 65535, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"unix_socket_permissions", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
|
|
gettext_noop("Sets the access permissions of the Unix-domain socket."),
|
|
gettext_noop("Unix-domain sockets use the usual Unix file system "
|
|
"permission set. The parameter value is expected to be an numeric mode "
|
|
"specification in the form accepted by the chmod and umask system "
|
|
"calls. (To use the customary octal format the number must start with "
|
|
"a 0 (zero).)")
|
|
},
|
|
&Unix_socket_permissions,
|
|
0777, 0000, 0777, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"work_mem", PGC_USERSET, RESOURCES_MEM,
|
|
gettext_noop("Sets the maximum memory to be used for query workspaces."),
|
|
gettext_noop("This much memory may be used by each internal "
|
|
"sort operation and hash table before switching to "
|
|
"temporary disk files.")
|
|
},
|
|
&work_mem,
|
|
1024, 8 * BLCKSZ / 1024, INT_MAX / 1024, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"maintenance_work_mem", PGC_USERSET, RESOURCES_MEM,
|
|
gettext_noop("Sets the maximum memory to be used for maintenance operations."),
|
|
gettext_noop("This includes operations such as VACUUM and CREATE INDEX.")
|
|
},
|
|
&maintenance_work_mem,
|
|
16384, 1024, INT_MAX / 1024, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"max_stack_depth", PGC_SUSET, RESOURCES_MEM,
|
|
gettext_noop("Sets the maximum stack depth, in kilobytes."),
|
|
NULL
|
|
},
|
|
&max_stack_depth,
|
|
2048, 100, INT_MAX / 1024, assign_max_stack_depth, NULL
|
|
},
|
|
|
|
{
|
|
{"vacuum_cost_page_hit", PGC_USERSET, RESOURCES,
|
|
gettext_noop("Vacuum cost for a page found in the buffer cache."),
|
|
NULL
|
|
},
|
|
&VacuumCostPageHit,
|
|
1, 0, 10000, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"vacuum_cost_page_miss", PGC_USERSET, RESOURCES,
|
|
gettext_noop("Vacuum cost for a page not found in the buffer cache."),
|
|
NULL
|
|
},
|
|
&VacuumCostPageMiss,
|
|
10, 0, 10000, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"vacuum_cost_page_dirty", PGC_USERSET, RESOURCES,
|
|
gettext_noop("Vacuum cost for a page dirtied by vacuum."),
|
|
NULL
|
|
},
|
|
&VacuumCostPageDirty,
|
|
20, 0, 10000, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"vacuum_cost_limit", PGC_USERSET, RESOURCES,
|
|
gettext_noop("Vacuum cost amount available before napping."),
|
|
NULL
|
|
},
|
|
&VacuumCostLimit,
|
|
200, 1, 10000, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"vacuum_cost_delay", PGC_USERSET, RESOURCES,
|
|
gettext_noop("Vacuum cost delay in milliseconds."),
|
|
NULL
|
|
},
|
|
&VacuumCostDelay,
|
|
0, 0, 1000, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"max_files_per_process", PGC_POSTMASTER, RESOURCES_KERNEL,
|
|
gettext_noop("Sets the maximum number of simultaneously open files for each server process."),
|
|
NULL
|
|
},
|
|
&max_files_per_process,
|
|
1000, 25, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
#ifdef LOCK_DEBUG
|
|
{
|
|
{"trace_lock_oidmin", PGC_SUSET, DEVELOPER_OPTIONS,
|
|
gettext_noop("no description available"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE
|
|
},
|
|
&Trace_lock_oidmin,
|
|
BootstrapObjectIdData, 1, INT_MAX, NULL, NULL
|
|
},
|
|
{
|
|
{"trace_lock_table", PGC_SUSET, DEVELOPER_OPTIONS,
|
|
gettext_noop("no description available"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE
|
|
},
|
|
&Trace_lock_table,
|
|
0, 0, INT_MAX, NULL, NULL
|
|
},
|
|
#endif
|
|
|
|
{
|
|
{"statement_timeout", PGC_USERSET, CLIENT_CONN_STATEMENT,
|
|
gettext_noop("Sets the maximum allowed duration (in milliseconds) of any statement."),
|
|
gettext_noop("A value of 0 turns off the timeout.")
|
|
},
|
|
&StatementTimeout,
|
|
0, 0, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"max_fsm_relations", PGC_POSTMASTER, RESOURCES_FSM,
|
|
gettext_noop("Sets the maximum number of tables and indexes for which free space is "
|
|
"tracked."),
|
|
NULL
|
|
},
|
|
&MaxFSMRelations,
|
|
1000, 100, INT_MAX, NULL, NULL
|
|
},
|
|
{
|
|
{"max_fsm_pages", PGC_POSTMASTER, RESOURCES_FSM,
|
|
gettext_noop("Sets the maximum number of disk pages for which free space is "
|
|
"tracked."),
|
|
NULL
|
|
},
|
|
&MaxFSMPages,
|
|
20000, 1000, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"max_locks_per_transaction", PGC_POSTMASTER, LOCK_MANAGEMENT,
|
|
gettext_noop("Sets the maximum number of locks per transaction."),
|
|
gettext_noop("The shared lock table is sized on the assumption that "
|
|
"at most max_locks_per_transaction * max_connections distinct "
|
|
"objects will need to be locked at any one time.")
|
|
},
|
|
&max_locks_per_xact,
|
|
64, 10, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"authentication_timeout", PGC_SIGHUP, CONN_AUTH_SECURITY,
|
|
gettext_noop("Sets the maximum time in seconds to complete client authentication."),
|
|
NULL
|
|
},
|
|
&AuthenticationTimeout,
|
|
60, 1, 600, NULL, NULL
|
|
},
|
|
|
|
{
|
|
/* Not for general use */
|
|
{"pre_auth_delay", PGC_SIGHUP, DEVELOPER_OPTIONS,
|
|
gettext_noop("no description available"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE
|
|
},
|
|
&PreAuthDelay,
|
|
0, 0, 60, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"checkpoint_segments", PGC_SIGHUP, WAL_CHECKPOINTS,
|
|
gettext_noop("Sets the maximum distance in log segments between automatic WAL checkpoints."),
|
|
NULL
|
|
},
|
|
&CheckPointSegments,
|
|
3, 1, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"checkpoint_timeout", PGC_SIGHUP, WAL_CHECKPOINTS,
|
|
gettext_noop("Sets the maximum time in seconds between automatic WAL checkpoints."),
|
|
NULL
|
|
},
|
|
&CheckPointTimeout,
|
|
300, 30, 3600, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"checkpoint_warning", PGC_SIGHUP, WAL_CHECKPOINTS,
|
|
gettext_noop("Logs if filling of checkpoint segments happens more "
|
|
"frequently than this (in seconds)."),
|
|
gettext_noop("Write a message to the server log if checkpoints "
|
|
"caused by the filling of checkpoint segment files happens more "
|
|
"frequently than this number of seconds. Zero turns off the warning.")
|
|
},
|
|
&CheckPointWarning,
|
|
30, 0, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"wal_buffers", PGC_POSTMASTER, WAL_SETTINGS,
|
|
gettext_noop("Sets the number of disk-page buffers in shared memory for WAL."),
|
|
NULL
|
|
},
|
|
&XLOGbuffers,
|
|
8, 4, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"commit_delay", PGC_USERSET, WAL_CHECKPOINTS,
|
|
gettext_noop("Sets the delay in microseconds between transaction commit and "
|
|
"flushing WAL to disk."),
|
|
NULL
|
|
},
|
|
&CommitDelay,
|
|
0, 0, 100000, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"commit_siblings", PGC_USERSET, WAL_CHECKPOINTS,
|
|
gettext_noop("Sets the minimum concurrent open transactions before performing "
|
|
"commit_delay."),
|
|
NULL
|
|
},
|
|
&CommitSiblings,
|
|
5, 1, 1000, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"extra_float_digits", PGC_USERSET, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Sets the number of digits displayed for floating-point values."),
|
|
gettext_noop("This affects real, double precision, and geometric data types. "
|
|
"The parameter value is added to the standard number of digits "
|
|
"(FLT_DIG or DBL_DIG as appropriate).")
|
|
},
|
|
&extra_float_digits,
|
|
0, -15, 2, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"log_min_duration_statement", PGC_USERLIMIT, LOGGING_WHEN,
|
|
gettext_noop("Sets the minimum execution time in milliseconds above which statements will "
|
|
"be logged."),
|
|
gettext_noop("Zero prints all queries. The default is -1 (turning this feature off).")
|
|
},
|
|
&log_min_duration_statement,
|
|
-1, -1, INT_MAX / 1000, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"debug_shared_buffers", PGC_POSTMASTER, STATS_MONITORING,
|
|
gettext_noop("Interval to report shared buffer status in seconds"),
|
|
NULL
|
|
},
|
|
&DebugSharedBuffers,
|
|
0, 0, 600, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"bgwriter_delay", PGC_SIGHUP, RESOURCES,
|
|
gettext_noop("Background writer sleep time between rounds in milliseconds"),
|
|
NULL
|
|
},
|
|
&BgWriterDelay,
|
|
200, 10, 5000, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"bgwriter_percent", PGC_SIGHUP, RESOURCES,
|
|
gettext_noop("Background writer percentage of dirty buffers to flush per round"),
|
|
NULL
|
|
},
|
|
&BgWriterPercent,
|
|
1, 1, 100, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"bgwriter_maxpages", PGC_SIGHUP, RESOURCES,
|
|
gettext_noop("Background writer maximum number of pages to flush per round"),
|
|
NULL
|
|
},
|
|
&BgWriterMaxPages,
|
|
100, 1, 1000, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"log_rotation_age", PGC_SIGHUP, LOGGING_WHERE,
|
|
gettext_noop("Automatic logfile rotation will occur after N minutes"),
|
|
NULL
|
|
},
|
|
&Log_RotationAge,
|
|
24*60, 0, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"log_rotation_size", PGC_SIGHUP, LOGGING_WHERE,
|
|
gettext_noop("Automatic logfile rotation will occur after N kilobytes"),
|
|
NULL
|
|
},
|
|
&Log_RotationSize,
|
|
10*1024, 0, INT_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"max_function_args", PGC_INTERNAL, COMPILE_OPTIONS,
|
|
gettext_noop("Shows the maximum number of function arguments"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&max_function_args,
|
|
FUNC_MAX_ARGS, FUNC_MAX_ARGS, FUNC_MAX_ARGS, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"max_index_keys", PGC_INTERNAL, COMPILE_OPTIONS,
|
|
gettext_noop("Shows the maximum number of index keys"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&max_index_keys,
|
|
INDEX_MAX_KEYS, INDEX_MAX_KEYS, INDEX_MAX_KEYS, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"max_identifier_length", PGC_INTERNAL, COMPILE_OPTIONS,
|
|
gettext_noop("Shows the maximum identifier length"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&max_identifier_length,
|
|
NAMEDATALEN - 1, NAMEDATALEN - 1, NAMEDATALEN - 1, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"block_size", PGC_INTERNAL, COMPILE_OPTIONS,
|
|
gettext_noop("Shows size of a disk block"),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&block_size,
|
|
BLCKSZ, BLCKSZ, BLCKSZ, NULL, NULL
|
|
},
|
|
|
|
/* End-of-list marker */
|
|
{
|
|
{NULL, 0, 0, NULL, NULL}, NULL, 0, 0, 0, NULL, NULL
|
|
}
|
|
};
|
|
|
|
|
|
static struct config_real ConfigureNamesReal[] =
|
|
{
|
|
{
|
|
{"effective_cache_size", PGC_USERSET, QUERY_TUNING_COST,
|
|
gettext_noop("Sets the planner's assumption about size of the disk cache."),
|
|
gettext_noop("That is, the portion of the kernel's disk cache that "
|
|
"will be used for PostgreSQL data files. This is measured in disk "
|
|
"pages, which are normally 8 kB each.")
|
|
},
|
|
&effective_cache_size,
|
|
DEFAULT_EFFECTIVE_CACHE_SIZE, 0, DBL_MAX, NULL, NULL
|
|
},
|
|
{
|
|
{"random_page_cost", PGC_USERSET, QUERY_TUNING_COST,
|
|
gettext_noop("Sets the planner's estimate of the cost of a nonsequentially "
|
|
"fetched disk page."),
|
|
gettext_noop("This is measured as a multiple of the cost of a "
|
|
"sequential page fetch. A higher value makes it more likely a "
|
|
"sequential scan will be used, a lower value makes it more likely an "
|
|
"index scan will be used.")
|
|
},
|
|
&random_page_cost,
|
|
DEFAULT_RANDOM_PAGE_COST, 0, DBL_MAX, NULL, NULL
|
|
},
|
|
{
|
|
{"cpu_tuple_cost", PGC_USERSET, QUERY_TUNING_COST,
|
|
gettext_noop("Sets the planner's estimate of the cost of processing each tuple (row)."),
|
|
gettext_noop("This is measured as a fraction of the cost of a "
|
|
"sequential page fetch.")
|
|
},
|
|
&cpu_tuple_cost,
|
|
DEFAULT_CPU_TUPLE_COST, 0, DBL_MAX, NULL, NULL
|
|
},
|
|
{
|
|
{"cpu_index_tuple_cost", PGC_USERSET, QUERY_TUNING_COST,
|
|
gettext_noop("Sets the planner's estimate of processing cost for each "
|
|
"index tuple (row) during index scan."),
|
|
gettext_noop("This is measured as a fraction of the cost of a "
|
|
"sequential page fetch.")
|
|
},
|
|
&cpu_index_tuple_cost,
|
|
DEFAULT_CPU_INDEX_TUPLE_COST, 0, DBL_MAX, NULL, NULL
|
|
},
|
|
{
|
|
{"cpu_operator_cost", PGC_USERSET, QUERY_TUNING_COST,
|
|
gettext_noop("Sets the planner's estimate of processing cost of each operator in WHERE."),
|
|
gettext_noop("This is measured as a fraction of the cost of a sequential "
|
|
"page fetch.")
|
|
},
|
|
&cpu_operator_cost,
|
|
DEFAULT_CPU_OPERATOR_COST, 0, DBL_MAX, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"geqo_selection_bias", PGC_USERSET, QUERY_TUNING_GEQO,
|
|
gettext_noop("GEQO: selective pressure within the population."),
|
|
NULL
|
|
},
|
|
&Geqo_selection_bias,
|
|
DEFAULT_GEQO_SELECTION_BIAS, MIN_GEQO_SELECTION_BIAS,
|
|
MAX_GEQO_SELECTION_BIAS, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"seed", PGC_USERSET, UNGROUPED,
|
|
gettext_noop("Sets the seed for random-number generation."),
|
|
NULL,
|
|
GUC_NO_SHOW_ALL | GUC_NO_RESET_ALL | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&phony_random_seed,
|
|
0.5, 0.0, 1.0, assign_random_seed, show_random_seed
|
|
},
|
|
|
|
/* End-of-list marker */
|
|
{
|
|
{NULL, 0, 0, NULL, NULL}, NULL, 0.0, 0.0, 0.0, NULL, NULL
|
|
}
|
|
};
|
|
|
|
|
|
static struct config_string ConfigureNamesString[] =
|
|
{
|
|
{
|
|
{"archive_command", PGC_SIGHUP, WAL_SETTINGS,
|
|
gettext_noop("WAL archiving command."),
|
|
gettext_noop("The shell command that will be called to archive a WAL file.")
|
|
},
|
|
&XLogArchiveCommand,
|
|
"", NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"client_encoding", PGC_USERSET, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Sets the client's character set encoding."),
|
|
NULL,
|
|
GUC_REPORT
|
|
},
|
|
&client_encoding_string,
|
|
"SQL_ASCII", assign_client_encoding, NULL
|
|
},
|
|
|
|
{
|
|
{"client_min_messages", PGC_USERSET, LOGGING_WHEN,
|
|
gettext_noop("Sets the message levels that are sent to the client."),
|
|
gettext_noop("Valid values are DEBUG5, DEBUG4, DEBUG3, DEBUG2, "
|
|
"DEBUG1, LOG, NOTICE, WARNING, and ERROR. Each level includes all the "
|
|
"levels that follow it. The later the level, the fewer messages are "
|
|
"sent.")
|
|
},
|
|
&client_min_messages_str,
|
|
"notice", assign_client_min_messages, NULL
|
|
},
|
|
|
|
{
|
|
{"log_min_messages", PGC_USERLIMIT, LOGGING_WHEN,
|
|
gettext_noop("Sets the message levels that are logged."),
|
|
gettext_noop("Valid values are DEBUG5, DEBUG4, DEBUG3, DEBUG2, DEBUG1, "
|
|
"INFO, NOTICE, WARNING, ERROR, LOG, FATAL, and PANIC. Each level "
|
|
"includes all the levels that follow it.")
|
|
},
|
|
&log_min_messages_str,
|
|
"notice", assign_log_min_messages, NULL
|
|
},
|
|
|
|
{
|
|
{"log_error_verbosity", PGC_SUSET, LOGGING_WHEN,
|
|
gettext_noop("Sets the verbosity of logged messages."),
|
|
gettext_noop("Valid values are \"terse\", \"default\", and \"verbose\".")
|
|
},
|
|
&log_error_verbosity_str,
|
|
"default", assign_log_error_verbosity, NULL
|
|
},
|
|
{
|
|
{"log_statement", PGC_USERLIMIT, LOGGING_WHAT,
|
|
gettext_noop("Sets the type of statements logged."),
|
|
gettext_noop("Valid values are \"none\", \"mod\", \"ddl\", and \"all\".")
|
|
},
|
|
&log_statement_str,
|
|
"none", assign_log_statement, NULL
|
|
},
|
|
|
|
{
|
|
{"log_min_error_statement", PGC_USERLIMIT, LOGGING_WHEN,
|
|
gettext_noop("Causes all statements generating error at or above this level to be logged."),
|
|
gettext_noop("All SQL statements that cause an error of the "
|
|
"specified level or a higher level are logged.")
|
|
},
|
|
&log_min_error_statement_str,
|
|
"panic", assign_min_error_statement, NULL
|
|
},
|
|
|
|
{
|
|
{"log_line_prefix", PGC_SIGHUP, LOGGING_WHAT,
|
|
gettext_noop("Controls information prefixed to each log line"),
|
|
gettext_noop("if blank no prefix is used")
|
|
},
|
|
&Log_line_prefix,
|
|
"", NULL, NULL
|
|
},
|
|
|
|
|
|
{
|
|
{"DateStyle", PGC_USERSET, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Sets the display format for date and time values."),
|
|
gettext_noop("Also controls interpretation of ambiguous "
|
|
"date inputs."),
|
|
GUC_LIST_INPUT | GUC_REPORT
|
|
},
|
|
&datestyle_string,
|
|
"ISO, MDY", assign_datestyle, NULL
|
|
},
|
|
|
|
{
|
|
{"default_transaction_isolation", PGC_USERSET, CLIENT_CONN_STATEMENT,
|
|
gettext_noop("Sets the transaction isolation level of each new transaction."),
|
|
gettext_noop("Each SQL transaction has an isolation level, which "
|
|
"can be either \"read uncommitted\", \"read committed\", \"repeatable read\", or \"serializable\".")
|
|
},
|
|
&default_iso_level_string,
|
|
"read committed", assign_defaultxactisolevel, NULL
|
|
},
|
|
|
|
{
|
|
{"dynamic_library_path", PGC_SUSET, CLIENT_CONN_OTHER,
|
|
gettext_noop("Sets the path for dynamically loadable modules."),
|
|
gettext_noop("If a dynamically loadable module needs to be opened and "
|
|
"the specified name does not have a directory component (i.e., the "
|
|
"name does not contain a slash), the system will search this path for "
|
|
"the specified file.")
|
|
},
|
|
&Dynamic_library_path,
|
|
"$libdir", NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"krb_server_keyfile", PGC_POSTMASTER, CONN_AUTH_SECURITY,
|
|
gettext_noop("Sets the location of the Kerberos server key file."),
|
|
NULL
|
|
},
|
|
&pg_krb_server_keyfile,
|
|
PG_KRB_SRVTAB, NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"rendezvous_name", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
|
|
gettext_noop("Sets the Rendezvous broadcast service name."),
|
|
NULL
|
|
},
|
|
&rendezvous_name,
|
|
"", NULL, NULL
|
|
},
|
|
|
|
/* See main.c about why defaults for LC_foo are not all alike */
|
|
|
|
{
|
|
{"lc_collate", PGC_INTERNAL, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Shows the collation order locale."),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&locale_collate,
|
|
"C", NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"lc_ctype", PGC_INTERNAL, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Shows the character classification and case conversion locale."),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&locale_ctype,
|
|
"C", NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"lc_messages", PGC_SUSET, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Sets the language in which messages are displayed."),
|
|
NULL
|
|
},
|
|
&locale_messages,
|
|
"", locale_messages_assign, NULL
|
|
},
|
|
|
|
{
|
|
{"lc_monetary", PGC_USERSET, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Sets the locale for formatting monetary amounts."),
|
|
NULL
|
|
},
|
|
&locale_monetary,
|
|
"C", locale_monetary_assign, NULL
|
|
},
|
|
|
|
{
|
|
{"lc_numeric", PGC_USERSET, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Sets the locale for formatting numbers."),
|
|
NULL
|
|
},
|
|
&locale_numeric,
|
|
"C", locale_numeric_assign, NULL
|
|
},
|
|
|
|
{
|
|
{"lc_time", PGC_USERSET, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Sets the locale for formatting date and time values."),
|
|
NULL
|
|
},
|
|
&locale_time,
|
|
"C", locale_time_assign, NULL
|
|
},
|
|
|
|
{
|
|
{"preload_libraries", PGC_POSTMASTER, RESOURCES_KERNEL,
|
|
gettext_noop("Lists shared libraries to preload into server."),
|
|
NULL,
|
|
GUC_LIST_INPUT | GUC_LIST_QUOTE
|
|
},
|
|
&preload_libraries_string,
|
|
"", NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"regex_flavor", PGC_USERSET, COMPAT_OPTIONS_PREVIOUS,
|
|
gettext_noop("Sets the regular expression \"flavor\"."),
|
|
gettext_noop("This can be set to advanced, extended, or basic.")
|
|
},
|
|
®ex_flavor_string,
|
|
"advanced", assign_regex_flavor, NULL
|
|
},
|
|
|
|
{
|
|
{"search_path", PGC_USERSET, CLIENT_CONN_STATEMENT,
|
|
gettext_noop("Sets the schema search order for names that are not schema-qualified."),
|
|
NULL,
|
|
GUC_LIST_INPUT | GUC_LIST_QUOTE
|
|
},
|
|
&namespace_search_path,
|
|
"$user,public", assign_search_path, NULL
|
|
},
|
|
|
|
{
|
|
/* Can't be set in postgresql.conf */
|
|
{"server_encoding", PGC_INTERNAL, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Sets the server (database) character set encoding."),
|
|
NULL,
|
|
GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&server_encoding_string,
|
|
"SQL_ASCII", NULL, NULL
|
|
},
|
|
|
|
{
|
|
/* Can't be set in postgresql.conf */
|
|
{"server_version", PGC_INTERNAL, UNGROUPED,
|
|
gettext_noop("Shows the server version."),
|
|
NULL,
|
|
GUC_REPORT | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&server_version_string,
|
|
PG_VERSION, NULL, NULL
|
|
},
|
|
|
|
{
|
|
/* Not for general use --- used by SET SESSION AUTHORIZATION */
|
|
{"session_authorization", PGC_USERSET, UNGROUPED,
|
|
gettext_noop("Sets the session user name."),
|
|
NULL,
|
|
GUC_REPORT | GUC_NO_SHOW_ALL | GUC_NO_RESET_ALL | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&session_authorization_string,
|
|
NULL, assign_session_authorization, show_session_authorization
|
|
},
|
|
|
|
{
|
|
{"log_destination", PGC_SIGHUP, LOGGING_WHERE,
|
|
gettext_noop("Sets the destination for server log output."),
|
|
gettext_noop("Valid values are combinations of stderr, syslog "
|
|
"and eventlog, depending on platform."),
|
|
GUC_LIST_INPUT
|
|
},
|
|
&log_destination_string,
|
|
"stderr", assign_log_destination, NULL
|
|
},
|
|
{
|
|
{"log_directory", PGC_SIGHUP, LOGGING_WHERE,
|
|
gettext_noop("Sets the destination directory for logfiles."),
|
|
gettext_noop("May be specified as relative to the cluster directory "
|
|
"or as absolute path.")
|
|
},
|
|
&Log_directory,
|
|
"pg_log", NULL, NULL
|
|
},
|
|
{
|
|
{"log_filename_prefix", PGC_SIGHUP, LOGGING_WHERE,
|
|
gettext_noop("Prefix for file names created in the log_directory."),
|
|
NULL
|
|
},
|
|
&Log_filename_prefix,
|
|
"postgresql-", NULL, NULL
|
|
},
|
|
|
|
#ifdef HAVE_SYSLOG
|
|
{
|
|
{"syslog_facility", PGC_POSTMASTER, LOGGING_WHERE,
|
|
gettext_noop("Sets the syslog \"facility\" to be used when syslog enabled."),
|
|
gettext_noop("Valid values are LOCAL0, LOCAL1, LOCAL2, LOCAL3, "
|
|
"LOCAL4, LOCAL5, LOCAL6, LOCAL7.")
|
|
},
|
|
&Syslog_facility,
|
|
"LOCAL0", assign_facility, NULL
|
|
},
|
|
{
|
|
{"syslog_ident", PGC_POSTMASTER, LOGGING_WHERE,
|
|
gettext_noop("Sets the program name used to identify PostgreSQL messages "
|
|
"in syslog."),
|
|
NULL
|
|
},
|
|
&Syslog_ident,
|
|
"postgres", NULL, NULL
|
|
},
|
|
#endif
|
|
|
|
{
|
|
{"TimeZone", PGC_USERSET, CLIENT_CONN_LOCALE,
|
|
gettext_noop("Sets the time zone for displaying and interpreting time stamps."),
|
|
NULL
|
|
},
|
|
&timezone_string,
|
|
"UNKNOWN", assign_timezone, show_timezone
|
|
},
|
|
|
|
{
|
|
{"transaction_isolation", PGC_USERSET, CLIENT_CONN_STATEMENT,
|
|
gettext_noop("Sets the current transaction's isolation level."),
|
|
NULL,
|
|
GUC_NO_RESET_ALL | GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
|
|
},
|
|
&XactIsoLevel_string,
|
|
NULL, assign_XactIsoLevel, show_XactIsoLevel
|
|
},
|
|
|
|
{
|
|
{"unix_socket_group", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
|
|
gettext_noop("Sets the owning group of the Unix-domain socket."),
|
|
gettext_noop("(The owning user of the socket is always the user "
|
|
"that starts the server.)")
|
|
},
|
|
&Unix_socket_group,
|
|
"", NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"unix_socket_directory", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
|
|
gettext_noop("Sets the directory where the Unix-domain socket will be created."),
|
|
NULL
|
|
},
|
|
&UnixSocketDir,
|
|
"", assign_canonical_path, NULL
|
|
},
|
|
|
|
{
|
|
{"listen_addresses", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
|
|
gettext_noop("Sets the host name or IP address(es) to listen to."),
|
|
NULL,
|
|
GUC_LIST_INPUT
|
|
},
|
|
&ListenAddresses,
|
|
"localhost", NULL, NULL
|
|
},
|
|
|
|
{
|
|
{"wal_sync_method", PGC_SIGHUP, WAL_SETTINGS,
|
|
gettext_noop("Selects the method used for forcing WAL updates out to disk."),
|
|
NULL
|
|
},
|
|
&XLOG_sync_method,
|
|
XLOG_sync_method_default, assign_xlog_sync_method, NULL
|
|
},
|
|
|
|
{
|
|
{"custom_variable_classes", PGC_POSTMASTER, RESOURCES_KERNEL,
|
|
gettext_noop("Sets the list of known custom variable classes"),
|
|
NULL,
|
|
GUC_LIST_INPUT | GUC_LIST_QUOTE
|
|
},
|
|
&custom_variable_classes,
|
|
NULL, assign_custom_variable_classes, NULL
|
|
},
|
|
|
|
{
|
|
{"pgdata", PGC_POSTMASTER, 0, gettext_noop("Sets the location of the data directory"), NULL},
|
|
&guc_pgdata,
|
|
NULL, assign_canonical_path, NULL
|
|
},
|
|
|
|
{
|
|
{"hba_conf", PGC_SIGHUP, 0, gettext_noop("Sets the location of the \"hba\" configuration file"), NULL},
|
|
&guc_hbafile,
|
|
NULL, assign_canonical_path, NULL
|
|
},
|
|
|
|
{
|
|
{"ident_conf", PGC_SIGHUP, 0, gettext_noop("Sets the location of the \"ident\" configuration file"), NULL},
|
|
&guc_identfile,
|
|
NULL, assign_canonical_path, NULL
|
|
},
|
|
|
|
{
|
|
{"external_pidfile", PGC_POSTMASTER, 0, gettext_noop("Writes the postmaster PID to the specified file"), NULL},
|
|
&external_pidfile,
|
|
NULL, assign_canonical_path, NULL
|
|
},
|
|
|
|
/* End-of-list marker */
|
|
{
|
|
{NULL, 0, 0, NULL, NULL}, NULL, NULL, NULL, NULL
|
|
}
|
|
};
|
|
|
|
|
|
/******** end of options list ********/
|
|
|
|
|
|
/*
|
|
* To allow continued support of obsolete names for GUC variables, we apply
|
|
* the following mappings to any unrecognized name. Note that an old name
|
|
* should be mapped to a new one only if the new variable has very similar
|
|
* semantics to the old.
|
|
*/
|
|
static const char * const map_old_guc_names[] = {
|
|
"sort_mem", "work_mem",
|
|
"vacuum_mem", "maintenance_work_mem",
|
|
NULL
|
|
};
|
|
|
|
|
|
/*
|
|
* Actual lookup of variables is done through this single, sorted array.
|
|
*/
|
|
static struct config_generic **guc_variables;
|
|
|
|
/* Current number of variables contained in the vector */
|
|
static int num_guc_variables;
|
|
|
|
/* Vector capacity */
|
|
static int size_guc_variables;
|
|
|
|
|
|
static bool guc_dirty; /* TRUE if need to do commit/abort work */
|
|
|
|
static bool reporting_enabled; /* TRUE to enable GUC_REPORT */
|
|
|
|
static char *guc_string_workspace; /* for avoiding memory leaks */
|
|
|
|
|
|
static int guc_var_compare(const void *a, const void *b);
|
|
static int guc_name_compare(const char *namea, const char *nameb);
|
|
static void push_old_value(struct config_generic *gconf);
|
|
static void ReportGUCOption(struct config_generic * record);
|
|
static char *_ShowOption(struct config_generic * record);
|
|
|
|
|
|
/*
|
|
* Some infrastructure for checking malloc/strdup/realloc calls
|
|
*/
|
|
static void *
|
|
guc_malloc(int elevel, size_t size)
|
|
{
|
|
void *data;
|
|
|
|
data = malloc(size);
|
|
if (data == NULL)
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_OUT_OF_MEMORY),
|
|
errmsg("out of memory")));
|
|
return data;
|
|
}
|
|
|
|
static void *
|
|
guc_realloc(int elevel, void *old, size_t size)
|
|
{
|
|
void *data;
|
|
|
|
data = realloc(old, size);
|
|
if (data == NULL)
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_OUT_OF_MEMORY),
|
|
errmsg("out of memory")));
|
|
return data;
|
|
}
|
|
|
|
static char *
|
|
guc_strdup(int elevel, const char *src)
|
|
{
|
|
char *data;
|
|
|
|
data = strdup(src);
|
|
if (data == NULL)
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_OUT_OF_MEMORY),
|
|
errmsg("out of memory")));
|
|
return data;
|
|
}
|
|
|
|
|
|
/*
|
|
* Support for assigning to a field of a string GUC item. Free the prior
|
|
* value if it's not referenced anywhere else in the item (including stacked
|
|
* states).
|
|
*/
|
|
static void
|
|
set_string_field(struct config_string *conf, char **field, char *newval)
|
|
{
|
|
char *oldval = *field;
|
|
GucStack *stack;
|
|
|
|
/* Do the assignment */
|
|
*field = newval;
|
|
|
|
/* Exit if any duplicate references, or if old value was NULL anyway */
|
|
if (oldval == NULL ||
|
|
oldval == *(conf->variable) ||
|
|
oldval == conf->reset_val ||
|
|
oldval == conf->tentative_val)
|
|
return;
|
|
for (stack = conf->gen.stack; stack; stack = stack->prev)
|
|
{
|
|
if (oldval == stack->tentative_val.stringval ||
|
|
oldval == stack->value.stringval)
|
|
return;
|
|
}
|
|
|
|
/* Not used anymore, so free it */
|
|
free(oldval);
|
|
}
|
|
|
|
/*
|
|
* Detect whether strval is referenced anywhere in a GUC string item
|
|
*/
|
|
static bool
|
|
string_field_used(struct config_string *conf, char *strval)
|
|
{
|
|
GucStack *stack;
|
|
|
|
if (strval == *(conf->variable) ||
|
|
strval == conf->reset_val ||
|
|
strval == conf->tentative_val)
|
|
return true;
|
|
for (stack = conf->gen.stack; stack; stack = stack->prev)
|
|
{
|
|
if (strval == stack->tentative_val.stringval ||
|
|
strval == stack->value.stringval)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
struct config_generic **
|
|
get_guc_variables(void)
|
|
{
|
|
return guc_variables;
|
|
}
|
|
|
|
|
|
/*
|
|
* Build the sorted array. This is split out so that it could be
|
|
* re-executed after startup (eg, we could allow loadable modules to
|
|
* add vars, and then we'd need to re-sort).
|
|
*/
|
|
void
|
|
build_guc_variables(void)
|
|
{
|
|
int size_vars;
|
|
int num_vars = 0;
|
|
struct config_generic **guc_vars;
|
|
int i;
|
|
|
|
for (i = 0; ConfigureNamesBool[i].gen.name; i++)
|
|
{
|
|
struct config_bool *conf = &ConfigureNamesBool[i];
|
|
|
|
/* Rather than requiring vartype to be filled in by hand, do this: */
|
|
conf->gen.vartype = PGC_BOOL;
|
|
num_vars++;
|
|
}
|
|
|
|
for (i = 0; ConfigureNamesInt[i].gen.name; i++)
|
|
{
|
|
struct config_int *conf = &ConfigureNamesInt[i];
|
|
|
|
conf->gen.vartype = PGC_INT;
|
|
num_vars++;
|
|
}
|
|
|
|
for (i = 0; ConfigureNamesReal[i].gen.name; i++)
|
|
{
|
|
struct config_real *conf = &ConfigureNamesReal[i];
|
|
|
|
conf->gen.vartype = PGC_REAL;
|
|
num_vars++;
|
|
}
|
|
|
|
for (i = 0; ConfigureNamesString[i].gen.name; i++)
|
|
{
|
|
struct config_string *conf = &ConfigureNamesString[i];
|
|
|
|
conf->gen.vartype = PGC_STRING;
|
|
num_vars++;
|
|
}
|
|
|
|
/* Create table with 20% slack
|
|
*/
|
|
size_vars = num_vars + num_vars / 4;
|
|
|
|
guc_vars = (struct config_generic **)
|
|
guc_malloc(FATAL, size_vars * sizeof(struct config_generic *));
|
|
|
|
num_vars = 0;
|
|
|
|
for (i = 0; ConfigureNamesBool[i].gen.name; i++)
|
|
guc_vars[num_vars++] = &ConfigureNamesBool[i].gen;
|
|
|
|
for (i = 0; ConfigureNamesInt[i].gen.name; i++)
|
|
guc_vars[num_vars++] = &ConfigureNamesInt[i].gen;
|
|
|
|
for (i = 0; ConfigureNamesReal[i].gen.name; i++)
|
|
guc_vars[num_vars++] = &ConfigureNamesReal[i].gen;
|
|
|
|
for (i = 0; ConfigureNamesString[i].gen.name; i++)
|
|
guc_vars[num_vars++] = &ConfigureNamesString[i].gen;
|
|
|
|
if (guc_variables)
|
|
free(guc_variables);
|
|
guc_variables = guc_vars;
|
|
num_guc_variables = num_vars;
|
|
size_guc_variables = size_vars;
|
|
qsort((void*) guc_variables, num_guc_variables,
|
|
sizeof(struct config_generic*), guc_var_compare);
|
|
}
|
|
|
|
static bool
|
|
is_custom_class(const char *name, int dotPos)
|
|
{
|
|
/* The assign_custom_variable_classes has made sure no empty
|
|
* identifiers or whitespace exists in the variable
|
|
*/
|
|
bool result = false;
|
|
const char *ccs = GetConfigOption("custom_variable_classes");
|
|
if(ccs != NULL)
|
|
{
|
|
const char *start = ccs;
|
|
for(;; ++ccs)
|
|
{
|
|
int c = *ccs;
|
|
if(c == 0 || c == ',')
|
|
{
|
|
if(dotPos == ccs - start && strncmp(start, name, dotPos) == 0)
|
|
{
|
|
result = true;
|
|
break;
|
|
}
|
|
if(c == 0)
|
|
break;
|
|
start = ccs + 1;
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Add a new GUC variable to the list of known variables. The
|
|
* list is expanded if needed.
|
|
*/
|
|
static bool
|
|
add_guc_variable(struct config_generic *var, int elevel)
|
|
{
|
|
if(num_guc_variables + 1 >= size_guc_variables)
|
|
{
|
|
/* Increase the vector by 25%
|
|
*/
|
|
int size_vars = size_guc_variables + size_guc_variables / 4;
|
|
struct config_generic** guc_vars;
|
|
|
|
if(size_vars == 0)
|
|
{
|
|
size_vars = 100;
|
|
guc_vars = (struct config_generic**)
|
|
guc_malloc(elevel, size_vars * sizeof(struct config_generic*));
|
|
}
|
|
else
|
|
{
|
|
guc_vars = (struct config_generic**)
|
|
guc_realloc(elevel, guc_variables, size_vars * sizeof(struct config_generic*));
|
|
}
|
|
|
|
if(guc_vars == NULL)
|
|
return false; /* out of memory */
|
|
|
|
guc_variables = guc_vars;
|
|
size_guc_variables = size_vars;
|
|
}
|
|
guc_variables[num_guc_variables++] = var;
|
|
qsort((void*) guc_variables, num_guc_variables,
|
|
sizeof(struct config_generic*), guc_var_compare);
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* Create and add a placeholder variable. It's presumed to belong
|
|
* to a valid custom variable class at this point.
|
|
*/
|
|
static struct config_string*
|
|
add_placeholder_variable(const char *name, int elevel)
|
|
{
|
|
size_t sz = sizeof(struct config_string) + sizeof(char*);
|
|
struct config_string* var;
|
|
struct config_generic* gen;
|
|
|
|
var = (struct config_string*)guc_malloc(elevel, sz);
|
|
if(var == NULL)
|
|
return NULL;
|
|
|
|
gen = &var->gen;
|
|
memset(var, 0, sz);
|
|
|
|
gen->name = guc_strdup(elevel, name);
|
|
if(gen->name == NULL)
|
|
{
|
|
free(var);
|
|
return NULL;
|
|
}
|
|
|
|
gen->context = PGC_USERSET;
|
|
gen->group = CUSTOM_OPTIONS;
|
|
gen->short_desc = "GUC placeholder variable";
|
|
gen->flags = GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE | GUC_CUSTOM_PLACEHOLDER;
|
|
gen->vartype = PGC_STRING;
|
|
|
|
/* The char* is allocated at the end of the struct since we have
|
|
* no 'static' place to point to.
|
|
*/
|
|
var->variable = (char**)(var + 1);
|
|
|
|
if(!add_guc_variable((struct config_generic*) var, elevel))
|
|
{
|
|
free((void *) gen->name);
|
|
free(var);
|
|
return NULL;
|
|
}
|
|
|
|
return var;
|
|
}
|
|
|
|
/*
|
|
* Look up option NAME. If it exists, return a pointer to its record,
|
|
* else return NULL.
|
|
*/
|
|
static struct config_generic *
|
|
find_option(const char *name, int elevel)
|
|
{
|
|
const char *dot;
|
|
const char **key = &name;
|
|
struct config_generic **res;
|
|
int i;
|
|
|
|
Assert(name);
|
|
|
|
/*
|
|
* By equating const char ** with struct config_generic *, we are
|
|
* assuming the name field is first in config_generic.
|
|
*/
|
|
res = (struct config_generic **) bsearch((void *) &key,
|
|
(void *) guc_variables,
|
|
num_guc_variables,
|
|
sizeof(struct config_generic *),
|
|
guc_var_compare);
|
|
if (res)
|
|
return *res;
|
|
|
|
/*
|
|
* See if the name is an obsolete name for a variable. We assume that
|
|
* the set of supported old names is short enough that a brute-force
|
|
* search is the best way.
|
|
*/
|
|
for (i = 0; map_old_guc_names[i] != NULL; i += 2)
|
|
{
|
|
if (guc_name_compare(name, map_old_guc_names[i]) == 0)
|
|
return find_option(map_old_guc_names[i+1], elevel);
|
|
}
|
|
|
|
/*
|
|
* Check if the name is qualified, and if so, check if the qualifier
|
|
* maps to a custom variable class.
|
|
*/
|
|
dot = strchr(name, GUC_QUALIFIER_SEPARATOR);
|
|
if(dot != NULL && is_custom_class(name, dot - name))
|
|
/* Add a placeholder variable for this name */
|
|
return (struct config_generic*)add_placeholder_variable(name, elevel);
|
|
|
|
/* Unknown name */
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* comparator for qsorting and bsearching guc_variables array
|
|
*/
|
|
static int
|
|
guc_var_compare(const void *a, const void *b)
|
|
{
|
|
struct config_generic *confa = *(struct config_generic **) a;
|
|
struct config_generic *confb = *(struct config_generic **) b;
|
|
|
|
return guc_name_compare(confa->name, confb->name);
|
|
}
|
|
|
|
|
|
static int
|
|
guc_name_compare(const char *namea, const char *nameb)
|
|
{
|
|
/*
|
|
* The temptation to use strcasecmp() here must be resisted, because
|
|
* the array ordering has to remain stable across setlocale() calls.
|
|
* So, build our own with a simple ASCII-only downcasing.
|
|
*/
|
|
while (*namea && *nameb)
|
|
{
|
|
char cha = *namea++;
|
|
char chb = *nameb++;
|
|
|
|
if (cha >= 'A' && cha <= 'Z')
|
|
cha += 'a' - 'A';
|
|
if (chb >= 'A' && chb <= 'Z')
|
|
chb += 'a' - 'A';
|
|
if (cha != chb)
|
|
return cha - chb;
|
|
}
|
|
if (*namea)
|
|
return 1; /* a is longer */
|
|
if (*nameb)
|
|
return -1; /* b is longer */
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialize GUC options during program startup.
|
|
*/
|
|
void
|
|
InitializeGUCOptions(void)
|
|
{
|
|
int i;
|
|
char *env;
|
|
|
|
/*
|
|
* Build sorted array of all GUC variables.
|
|
*/
|
|
build_guc_variables();
|
|
|
|
/*
|
|
* Load all variables with their compiled-in defaults, and initialize
|
|
* status fields as needed.
|
|
*/
|
|
for (i = 0; i < num_guc_variables; i++)
|
|
{
|
|
struct config_generic *gconf = guc_variables[i];
|
|
|
|
gconf->status = 0;
|
|
gconf->reset_source = PGC_S_DEFAULT;
|
|
gconf->tentative_source = PGC_S_DEFAULT;
|
|
gconf->source = PGC_S_DEFAULT;
|
|
gconf->stack = NULL;
|
|
|
|
switch (gconf->vartype)
|
|
{
|
|
case PGC_BOOL:
|
|
{
|
|
struct config_bool *conf = (struct config_bool *) gconf;
|
|
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (conf->reset_val, true,
|
|
PGC_S_DEFAULT))
|
|
elog(FATAL, "failed to initialize %s to %d",
|
|
conf->gen.name, (int) conf->reset_val);
|
|
*conf->variable = conf->reset_val;
|
|
break;
|
|
}
|
|
case PGC_INT:
|
|
{
|
|
struct config_int *conf = (struct config_int *) gconf;
|
|
|
|
Assert(conf->reset_val >= conf->min);
|
|
Assert(conf->reset_val <= conf->max);
|
|
|
|
/*
|
|
* Check to make sure we only have valid
|
|
* PGC_USERLIMITs
|
|
*/
|
|
Assert(conf->gen.context != PGC_USERLIMIT ||
|
|
strcmp(conf->gen.name, "log_min_duration_statement") == 0);
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (conf->reset_val, true,
|
|
PGC_S_DEFAULT))
|
|
elog(FATAL, "failed to initialize %s to %d",
|
|
conf->gen.name, conf->reset_val);
|
|
*conf->variable = conf->reset_val;
|
|
break;
|
|
}
|
|
case PGC_REAL:
|
|
{
|
|
struct config_real *conf = (struct config_real *) gconf;
|
|
|
|
Assert(conf->reset_val >= conf->min);
|
|
Assert(conf->reset_val <= conf->max);
|
|
Assert(conf->gen.context != PGC_USERLIMIT);
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (conf->reset_val, true,
|
|
PGC_S_DEFAULT))
|
|
elog(FATAL, "failed to initialize %s to %g",
|
|
conf->gen.name, conf->reset_val);
|
|
*conf->variable = conf->reset_val;
|
|
break;
|
|
}
|
|
case PGC_STRING:
|
|
{
|
|
struct config_string *conf = (struct config_string *) gconf;
|
|
char *str;
|
|
|
|
/* Check to make sure we only have valid PGC_USERLIMITs */
|
|
Assert(conf->gen.context != PGC_USERLIMIT ||
|
|
conf->assign_hook == assign_log_min_messages ||
|
|
conf->assign_hook == assign_min_error_statement ||
|
|
conf->assign_hook == assign_log_statement);
|
|
*conf->variable = NULL;
|
|
conf->reset_val = NULL;
|
|
conf->tentative_val = NULL;
|
|
|
|
if (conf->boot_val == NULL)
|
|
{
|
|
/* Cannot set value yet */
|
|
break;
|
|
}
|
|
|
|
str = guc_strdup(FATAL, conf->boot_val);
|
|
conf->reset_val = str;
|
|
|
|
if (conf->assign_hook)
|
|
{
|
|
const char *newstr;
|
|
|
|
newstr = (*conf->assign_hook) (str, true,
|
|
PGC_S_DEFAULT);
|
|
if (newstr == NULL)
|
|
{
|
|
elog(FATAL, "failed to initialize %s to \"%s\"",
|
|
conf->gen.name, str);
|
|
}
|
|
else if (newstr != str)
|
|
{
|
|
free(str);
|
|
|
|
/*
|
|
* See notes in set_config_option about
|
|
* casting
|
|
*/
|
|
str = (char *) newstr;
|
|
conf->reset_val = str;
|
|
}
|
|
}
|
|
*conf->variable = str;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
guc_dirty = false;
|
|
|
|
reporting_enabled = false;
|
|
|
|
guc_string_workspace = NULL;
|
|
|
|
/*
|
|
* Prevent any attempt to override the transaction modes from
|
|
* non-interactive sources.
|
|
*/
|
|
SetConfigOption("transaction_isolation", "default",
|
|
PGC_POSTMASTER, PGC_S_OVERRIDE);
|
|
SetConfigOption("transaction_read_only", "no",
|
|
PGC_POSTMASTER, PGC_S_OVERRIDE);
|
|
|
|
/*
|
|
* For historical reasons, some GUC parameters can receive defaults
|
|
* from environment variables. Process those settings.
|
|
*/
|
|
|
|
env = getenv("PGPORT");
|
|
if (env != NULL)
|
|
SetConfigOption("port", env, PGC_POSTMASTER, PGC_S_ENV_VAR);
|
|
|
|
env = getenv("PGDATESTYLE");
|
|
if (env != NULL)
|
|
SetConfigOption("datestyle", env, PGC_POSTMASTER, PGC_S_ENV_VAR);
|
|
|
|
env = getenv("PGCLIENTENCODING");
|
|
if (env != NULL)
|
|
SetConfigOption("client_encoding", env, PGC_POSTMASTER, PGC_S_ENV_VAR);
|
|
}
|
|
|
|
|
|
/*
|
|
* Reset all options to their saved default values (implements RESET ALL)
|
|
*/
|
|
void
|
|
ResetAllOptions(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < num_guc_variables; i++)
|
|
{
|
|
struct config_generic *gconf = guc_variables[i];
|
|
|
|
/* Don't reset non-SET-able values */
|
|
if (gconf->context != PGC_SUSET &&
|
|
gconf->context != PGC_USERLIMIT &&
|
|
gconf->context != PGC_USERSET)
|
|
continue;
|
|
/* Don't reset if special exclusion from RESET ALL */
|
|
if (gconf->flags & GUC_NO_RESET_ALL)
|
|
continue;
|
|
/* No need to reset if wasn't SET */
|
|
if (gconf->source <= PGC_S_OVERRIDE)
|
|
continue;
|
|
|
|
/* Save old value to support transaction abort */
|
|
push_old_value(gconf);
|
|
|
|
switch (gconf->vartype)
|
|
{
|
|
case PGC_BOOL:
|
|
{
|
|
struct config_bool *conf = (struct config_bool *) gconf;
|
|
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (conf->reset_val, true,
|
|
PGC_S_SESSION))
|
|
elog(ERROR, "failed to reset %s", conf->gen.name);
|
|
*conf->variable = conf->reset_val;
|
|
conf->tentative_val = conf->reset_val;
|
|
conf->gen.source = conf->gen.reset_source;
|
|
conf->gen.tentative_source = conf->gen.reset_source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
guc_dirty = true;
|
|
break;
|
|
}
|
|
case PGC_INT:
|
|
{
|
|
struct config_int *conf = (struct config_int *) gconf;
|
|
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (conf->reset_val, true,
|
|
PGC_S_SESSION))
|
|
elog(ERROR, "failed to reset %s", conf->gen.name);
|
|
*conf->variable = conf->reset_val;
|
|
conf->tentative_val = conf->reset_val;
|
|
conf->gen.source = conf->gen.reset_source;
|
|
conf->gen.tentative_source = conf->gen.reset_source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
guc_dirty = true;
|
|
break;
|
|
}
|
|
case PGC_REAL:
|
|
{
|
|
struct config_real *conf = (struct config_real *) gconf;
|
|
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (conf->reset_val, true,
|
|
PGC_S_SESSION))
|
|
elog(ERROR, "failed to reset %s", conf->gen.name);
|
|
*conf->variable = conf->reset_val;
|
|
conf->tentative_val = conf->reset_val;
|
|
conf->gen.source = conf->gen.reset_source;
|
|
conf->gen.tentative_source = conf->gen.reset_source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
guc_dirty = true;
|
|
break;
|
|
}
|
|
case PGC_STRING:
|
|
{
|
|
struct config_string *conf = (struct config_string *) gconf;
|
|
char *str;
|
|
|
|
if (conf->reset_val == NULL)
|
|
{
|
|
/* Nothing to reset to, as yet; so do nothing */
|
|
break;
|
|
}
|
|
|
|
/* We need not strdup here */
|
|
str = conf->reset_val;
|
|
|
|
if (conf->assign_hook)
|
|
{
|
|
const char *newstr;
|
|
|
|
newstr = (*conf->assign_hook) (str, true,
|
|
PGC_S_SESSION);
|
|
if (newstr == NULL)
|
|
elog(ERROR, "failed to reset %s", conf->gen.name);
|
|
else if (newstr != str)
|
|
{
|
|
/*
|
|
* See notes in set_config_option about
|
|
* casting
|
|
*/
|
|
str = (char *) newstr;
|
|
}
|
|
}
|
|
|
|
set_string_field(conf, conf->variable, str);
|
|
set_string_field(conf, &conf->tentative_val, str);
|
|
conf->gen.source = conf->gen.reset_source;
|
|
conf->gen.tentative_source = conf->gen.reset_source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
guc_dirty = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (gconf->flags & GUC_REPORT)
|
|
ReportGUCOption(gconf);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* push_old_value
|
|
* Push previous state during first assignment to a GUC variable
|
|
* within a particular transaction.
|
|
*
|
|
* We have to be willing to "back-fill" the state stack if the first
|
|
* assignment occurs within a subtransaction nested several levels deep.
|
|
* This ensures that if an intermediate transaction aborts, it will have
|
|
* the proper value available to restore the setting to.
|
|
*/
|
|
static void
|
|
push_old_value(struct config_generic *gconf)
|
|
{
|
|
int my_level = GetCurrentTransactionNestLevel();
|
|
GucStack *stack;
|
|
|
|
/* If we're not inside a transaction, do nothing */
|
|
if (my_level == 0)
|
|
return;
|
|
|
|
for (;;)
|
|
{
|
|
/* Done if we already pushed it at this nesting depth */
|
|
if (gconf->stack && gconf->stack->nest_level >= my_level)
|
|
return;
|
|
|
|
/*
|
|
* We keep all the stack entries in TopTransactionContext so as to
|
|
* avoid allocation problems when a subtransaction back-fills stack
|
|
* entries for upper transaction levels.
|
|
*/
|
|
stack = (GucStack *) MemoryContextAlloc(TopTransactionContext,
|
|
sizeof(GucStack));
|
|
|
|
stack->prev = gconf->stack;
|
|
stack->nest_level = stack->prev ? stack->prev->nest_level + 1 : 1;
|
|
stack->status = gconf->status;
|
|
stack->tentative_source = gconf->tentative_source;
|
|
stack->source = gconf->source;
|
|
|
|
switch (gconf->vartype)
|
|
{
|
|
case PGC_BOOL:
|
|
stack->tentative_val.boolval =
|
|
((struct config_bool *) gconf)->tentative_val;
|
|
stack->value.boolval =
|
|
*((struct config_bool *) gconf)->variable;
|
|
break;
|
|
|
|
case PGC_INT:
|
|
stack->tentative_val.intval =
|
|
((struct config_int *) gconf)->tentative_val;
|
|
stack->value.intval =
|
|
*((struct config_int *) gconf)->variable;
|
|
break;
|
|
|
|
case PGC_REAL:
|
|
stack->tentative_val.realval =
|
|
((struct config_real *) gconf)->tentative_val;
|
|
stack->value.realval =
|
|
*((struct config_real *) gconf)->variable;
|
|
break;
|
|
|
|
case PGC_STRING:
|
|
stack->tentative_val.stringval =
|
|
((struct config_string *) gconf)->tentative_val;
|
|
stack->value.stringval =
|
|
*((struct config_string *) gconf)->variable;
|
|
break;
|
|
}
|
|
|
|
gconf->stack = stack;
|
|
|
|
/* Set state to indicate nothing happened yet within this level */
|
|
gconf->status = GUC_HAVE_STACK;
|
|
|
|
/* Ensure we remember to pop at end of xact */
|
|
guc_dirty = true;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Do GUC processing at transaction or subtransaction commit or abort.
|
|
*/
|
|
void
|
|
AtEOXact_GUC(bool isCommit, bool isSubXact)
|
|
{
|
|
int my_level;
|
|
int i;
|
|
|
|
/* Quick exit if nothing's changed in this transaction */
|
|
if (!guc_dirty)
|
|
return;
|
|
|
|
/* Prevent memory leak if ereport during an assign_hook */
|
|
if (guc_string_workspace)
|
|
{
|
|
free(guc_string_workspace);
|
|
guc_string_workspace = NULL;
|
|
}
|
|
|
|
my_level = GetCurrentTransactionNestLevel();
|
|
Assert(isSubXact ? (my_level > 1) : (my_level == 1));
|
|
|
|
for (i = 0; i < num_guc_variables; i++)
|
|
{
|
|
struct config_generic *gconf = guc_variables[i];
|
|
int my_status = gconf->status;
|
|
GucStack *stack = gconf->stack;
|
|
bool useTentative;
|
|
bool changed;
|
|
|
|
/*
|
|
* Skip if nothing's happened to this var in this transaction
|
|
*/
|
|
if (my_status == 0)
|
|
{
|
|
Assert(stack == NULL);
|
|
continue;
|
|
}
|
|
/* Assert that we stacked old value before changing it */
|
|
Assert(stack != NULL && (my_status & GUC_HAVE_STACK));
|
|
/* However, the last change may have been at an outer xact level */
|
|
if (stack->nest_level < my_level)
|
|
continue;
|
|
Assert(stack->nest_level == my_level);
|
|
|
|
/*
|
|
* We will pop the stack entry. Start by restoring outer xact status
|
|
* (since we may want to modify it below). Be careful to use
|
|
* my_status to reference the inner xact status below this point...
|
|
*/
|
|
gconf->status = stack->status;
|
|
|
|
/*
|
|
* We have two cases:
|
|
*
|
|
* If commit and HAVE_TENTATIVE, set actual value to tentative
|
|
* (this is to override a SET LOCAL if one occurred later than SET).
|
|
* We keep the tentative value and propagate HAVE_TENTATIVE to
|
|
* the parent status, allowing the SET's effect to percolate up.
|
|
* (But if we're exiting the outermost transaction, we'll drop the
|
|
* HAVE_TENTATIVE bit below.)
|
|
*
|
|
* Otherwise, we have a transaction that aborted or executed only
|
|
* SET LOCAL (or no SET at all). In either case it should have no
|
|
* further effect, so restore both tentative and actual values from
|
|
* the stack entry.
|
|
*/
|
|
|
|
useTentative = isCommit && (my_status & GUC_HAVE_TENTATIVE) != 0;
|
|
changed = false;
|
|
|
|
switch (gconf->vartype)
|
|
{
|
|
case PGC_BOOL:
|
|
{
|
|
struct config_bool *conf = (struct config_bool *) gconf;
|
|
bool newval;
|
|
GucSource newsource;
|
|
|
|
if (useTentative)
|
|
{
|
|
newval = conf->tentative_val;
|
|
newsource = conf->gen.tentative_source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
}
|
|
else
|
|
{
|
|
newval = stack->value.boolval;
|
|
newsource = stack->source;
|
|
conf->tentative_val = stack->tentative_val.boolval;
|
|
conf->gen.tentative_source = stack->tentative_source;
|
|
}
|
|
|
|
if (*conf->variable != newval)
|
|
{
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (newval,
|
|
true, PGC_S_OVERRIDE))
|
|
elog(LOG, "failed to commit %s",
|
|
conf->gen.name);
|
|
*conf->variable = newval;
|
|
changed = true;
|
|
}
|
|
conf->gen.source = newsource;
|
|
break;
|
|
}
|
|
case PGC_INT:
|
|
{
|
|
struct config_int *conf = (struct config_int *) gconf;
|
|
int newval;
|
|
GucSource newsource;
|
|
|
|
if (useTentative)
|
|
{
|
|
newval = conf->tentative_val;
|
|
newsource = conf->gen.tentative_source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
}
|
|
else
|
|
{
|
|
newval = stack->value.intval;
|
|
newsource = stack->source;
|
|
conf->tentative_val = stack->tentative_val.intval;
|
|
conf->gen.tentative_source = stack->tentative_source;
|
|
}
|
|
|
|
if (*conf->variable != newval)
|
|
{
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (newval,
|
|
true, PGC_S_OVERRIDE))
|
|
elog(LOG, "failed to commit %s",
|
|
conf->gen.name);
|
|
*conf->variable = newval;
|
|
changed = true;
|
|
}
|
|
conf->gen.source = newsource;
|
|
break;
|
|
}
|
|
case PGC_REAL:
|
|
{
|
|
struct config_real *conf = (struct config_real *) gconf;
|
|
double newval;
|
|
GucSource newsource;
|
|
|
|
if (useTentative)
|
|
{
|
|
newval = conf->tentative_val;
|
|
newsource = conf->gen.tentative_source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
}
|
|
else
|
|
{
|
|
newval = stack->value.realval;
|
|
newsource = stack->source;
|
|
conf->tentative_val = stack->tentative_val.realval;
|
|
conf->gen.tentative_source = stack->tentative_source;
|
|
}
|
|
|
|
if (*conf->variable != newval)
|
|
{
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (newval,
|
|
true, PGC_S_OVERRIDE))
|
|
elog(LOG, "failed to commit %s",
|
|
conf->gen.name);
|
|
*conf->variable = newval;
|
|
changed = true;
|
|
}
|
|
conf->gen.source = newsource;
|
|
break;
|
|
}
|
|
case PGC_STRING:
|
|
{
|
|
struct config_string *conf = (struct config_string *) gconf;
|
|
char *newval;
|
|
GucSource newsource;
|
|
|
|
if (useTentative)
|
|
{
|
|
newval = conf->tentative_val;
|
|
newsource = conf->gen.tentative_source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
}
|
|
else
|
|
{
|
|
newval = stack->value.stringval;
|
|
newsource = stack->source;
|
|
set_string_field(conf, &conf->tentative_val,
|
|
stack->tentative_val.stringval);
|
|
conf->gen.tentative_source = stack->tentative_source;
|
|
}
|
|
|
|
if (*conf->variable != newval)
|
|
{
|
|
if (conf->assign_hook)
|
|
{
|
|
const char *newstr;
|
|
|
|
newstr = (*conf->assign_hook) (newval, true,
|
|
PGC_S_OVERRIDE);
|
|
if (newstr == NULL)
|
|
elog(LOG, "failed to commit %s",
|
|
conf->gen.name);
|
|
else if (newstr != newval)
|
|
{
|
|
/*
|
|
* If newval should now be freed, it'll be
|
|
* taken care of below.
|
|
*
|
|
* See notes in set_config_option about
|
|
* casting
|
|
*/
|
|
newval = (char *) newstr;
|
|
}
|
|
}
|
|
|
|
set_string_field(conf, conf->variable, newval);
|
|
changed = true;
|
|
}
|
|
conf->gen.source = newsource;
|
|
/* Release stacked values if not used anymore */
|
|
set_string_field(conf, &stack->value.stringval,
|
|
NULL);
|
|
set_string_field(conf, &stack->tentative_val.stringval,
|
|
NULL);
|
|
/* Don't store tentative value separately after commit */
|
|
if (!isSubXact)
|
|
set_string_field(conf, &conf->tentative_val, NULL);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Finish popping the state stack */
|
|
gconf->stack = stack->prev;
|
|
pfree(stack);
|
|
|
|
/*
|
|
* If we're now out of all xact levels, forget TENTATIVE status bit;
|
|
* there's nothing tentative about the value anymore.
|
|
*/
|
|
if (!isSubXact)
|
|
{
|
|
Assert(gconf->stack == NULL);
|
|
gconf->status = 0;
|
|
}
|
|
|
|
/* Report new value if we changed it */
|
|
if (changed && (gconf->flags & GUC_REPORT))
|
|
ReportGUCOption(gconf);
|
|
}
|
|
|
|
/*
|
|
* If we're now out of all xact levels, we can clear guc_dirty.
|
|
* (Note: we cannot reset guc_dirty when exiting a subtransaction,
|
|
* because we know that all outer transaction levels will have stacked
|
|
* values to deal with.)
|
|
*/
|
|
if (!isSubXact)
|
|
guc_dirty = false;
|
|
}
|
|
|
|
|
|
/*
|
|
* Start up automatic reporting of changes to variables marked GUC_REPORT.
|
|
* This is executed at completion of backend startup.
|
|
*/
|
|
void
|
|
BeginReportingGUCOptions(void)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* Don't do anything unless talking to an interactive frontend of
|
|
* protocol 3.0 or later.
|
|
*/
|
|
if (whereToSendOutput != Remote ||
|
|
PG_PROTOCOL_MAJOR(FrontendProtocol) < 3)
|
|
return;
|
|
|
|
reporting_enabled = true;
|
|
|
|
/* Transmit initial values of interesting variables */
|
|
for (i = 0; i < num_guc_variables; i++)
|
|
{
|
|
struct config_generic *conf = guc_variables[i];
|
|
|
|
if (conf->flags & GUC_REPORT)
|
|
ReportGUCOption(conf);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ReportGUCOption: if appropriate, transmit option value to frontend
|
|
*/
|
|
static void
|
|
ReportGUCOption(struct config_generic * record)
|
|
{
|
|
if (reporting_enabled && (record->flags & GUC_REPORT))
|
|
{
|
|
char *val = _ShowOption(record);
|
|
StringInfoData msgbuf;
|
|
|
|
pq_beginmessage(&msgbuf, 'S');
|
|
pq_sendstring(&msgbuf, record->name);
|
|
pq_sendstring(&msgbuf, val);
|
|
pq_endmessage(&msgbuf);
|
|
|
|
pfree(val);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Try to interpret value as boolean value. Valid values are: true,
|
|
* false, yes, no, on, off, 1, 0. If the string parses okay, return
|
|
* true, else false. If result is not NULL, return the parsing result
|
|
* there.
|
|
*/
|
|
static bool
|
|
parse_bool(const char *value, bool *result)
|
|
{
|
|
size_t len = strlen(value);
|
|
|
|
if (pg_strncasecmp(value, "true", len) == 0)
|
|
{
|
|
if (result)
|
|
*result = true;
|
|
}
|
|
else if (pg_strncasecmp(value, "false", len) == 0)
|
|
{
|
|
if (result)
|
|
*result = false;
|
|
}
|
|
|
|
else if (pg_strncasecmp(value, "yes", len) == 0)
|
|
{
|
|
if (result)
|
|
*result = true;
|
|
}
|
|
else if (pg_strncasecmp(value, "no", len) == 0)
|
|
{
|
|
if (result)
|
|
*result = false;
|
|
}
|
|
|
|
else if (pg_strcasecmp(value, "on") == 0)
|
|
{
|
|
if (result)
|
|
*result = true;
|
|
}
|
|
else if (pg_strcasecmp(value, "off") == 0)
|
|
{
|
|
if (result)
|
|
*result = false;
|
|
}
|
|
|
|
else if (pg_strcasecmp(value, "1") == 0)
|
|
{
|
|
if (result)
|
|
*result = true;
|
|
}
|
|
else if (pg_strcasecmp(value, "0") == 0)
|
|
{
|
|
if (result)
|
|
*result = false;
|
|
}
|
|
|
|
else
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Try to parse value as an integer. The accepted formats are the
|
|
* usual decimal, octal, or hexadecimal formats. If the string parses
|
|
* okay, return true, else false. If result is not NULL, return the
|
|
* value there.
|
|
*/
|
|
static bool
|
|
parse_int(const char *value, int *result)
|
|
{
|
|
long val;
|
|
char *endptr;
|
|
|
|
errno = 0;
|
|
val = strtol(value, &endptr, 0);
|
|
if (endptr == value || *endptr != '\0' || errno == ERANGE
|
|
#ifdef HAVE_LONG_INT_64
|
|
/* if long > 32 bits, check for overflow of int4 */
|
|
|| val != (long) ((int32) val)
|
|
#endif
|
|
)
|
|
return false;
|
|
if (result)
|
|
*result = (int) val;
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Try to parse value as a floating point constant in the usual
|
|
* format. If the value parsed okay return true, else false. If
|
|
* result is not NULL, return the semantic value there.
|
|
*/
|
|
static bool
|
|
parse_real(const char *value, double *result)
|
|
{
|
|
double val;
|
|
char *endptr;
|
|
|
|
errno = 0;
|
|
val = strtod(value, &endptr);
|
|
if (endptr == value || *endptr != '\0' || errno == ERANGE)
|
|
return false;
|
|
if (result)
|
|
*result = val;
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Sets option `name' to given value. The value should be a string
|
|
* which is going to be parsed and converted to the appropriate data
|
|
* type. The context and source parameters indicate in which context this
|
|
* function is being called so it can apply the access restrictions
|
|
* properly.
|
|
*
|
|
* If value is NULL, set the option to its default value. If the
|
|
* parameter changeVal is false then don't really set the option but do all
|
|
* the checks to see if it would work.
|
|
*
|
|
* If there is an error (non-existing option, invalid value) then an
|
|
* ereport(ERROR) is thrown *unless* this is called in a context where we
|
|
* don't want to ereport (currently, startup or SIGHUP config file reread).
|
|
* In that case we write a suitable error message via ereport(DEBUG) and
|
|
* return false. This is working around the deficiencies in the ereport
|
|
* mechanism, so don't blame me. In all other cases, the function
|
|
* returns true, including cases where the input is valid but we chose
|
|
* not to apply it because of context or source-priority considerations.
|
|
*
|
|
* See also SetConfigOption for an external interface.
|
|
*/
|
|
bool
|
|
set_config_option(const char *name, const char *value,
|
|
GucContext context, GucSource source,
|
|
bool isLocal, bool changeVal)
|
|
{
|
|
struct config_generic *record;
|
|
int elevel;
|
|
bool makeDefault, changeValOrig = changeVal;
|
|
|
|
if (context == PGC_SIGHUP || source == PGC_S_DEFAULT)
|
|
elevel = DEBUG2;
|
|
else if (source == PGC_S_DATABASE || source == PGC_S_USER)
|
|
elevel = INFO;
|
|
else
|
|
elevel = ERROR;
|
|
|
|
record = find_option(name, elevel);
|
|
if (record == NULL)
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_UNDEFINED_OBJECT),
|
|
errmsg("unrecognized configuration parameter \"%s\"", name)));
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Check if the option can be set at this time. See guc.h for the
|
|
* precise rules. Note that we don't want to throw errors if we're in
|
|
* the SIGHUP context. In that case we just ignore the attempt and
|
|
* return true.
|
|
*/
|
|
switch (record->context)
|
|
{
|
|
case PGC_INTERNAL:
|
|
if (context == PGC_SIGHUP)
|
|
return true;
|
|
if (context != PGC_INTERNAL)
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
|
|
errmsg("parameter \"%s\" cannot be changed",
|
|
name)));
|
|
return false;
|
|
}
|
|
break;
|
|
case PGC_POSTMASTER:
|
|
if (context == PGC_SIGHUP)
|
|
return true;
|
|
if (context != PGC_POSTMASTER)
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
|
|
errmsg("parameter \"%s\" cannot be changed after server start",
|
|
name)));
|
|
return false;
|
|
}
|
|
break;
|
|
case PGC_SIGHUP:
|
|
if (context != PGC_SIGHUP && context != PGC_POSTMASTER)
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
|
|
errmsg("parameter \"%s\" cannot be changed now",
|
|
name)));
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Hmm, the idea of the SIGHUP context is "ought to be global,
|
|
* but can be changed after postmaster start". But there's
|
|
* nothing that prevents a crafty administrator from sending
|
|
* SIGHUP signals to individual backends only.
|
|
*/
|
|
break;
|
|
case PGC_BACKEND:
|
|
if (context == PGC_SIGHUP)
|
|
{
|
|
/*
|
|
* If a PGC_BACKEND parameter is changed in the config
|
|
* file, we want to accept the new value in the postmaster
|
|
* (whence it will propagate to subsequently-started
|
|
* backends), but ignore it in existing backends. This is
|
|
* a tad klugy, but necessary because we don't re-read the
|
|
* config file during backend start.
|
|
*/
|
|
if (IsUnderPostmaster)
|
|
return true;
|
|
}
|
|
else if (context != PGC_BACKEND && context != PGC_POSTMASTER)
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_CANT_CHANGE_RUNTIME_PARAM),
|
|
errmsg("parameter \"%s\" cannot be set after connection start",
|
|
name)));
|
|
return false;
|
|
}
|
|
break;
|
|
case PGC_SUSET:
|
|
if (context == PGC_USERSET || context == PGC_BACKEND)
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
|
|
errmsg("permission denied to set parameter \"%s\"",
|
|
name)));
|
|
return false;
|
|
}
|
|
break;
|
|
case PGC_USERLIMIT:
|
|
/* USERLIMIT permissions checked below */
|
|
break;
|
|
case PGC_USERSET:
|
|
/* always okay */
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Should we set reset/stacked values? (If so, the behavior is not
|
|
* transactional.)
|
|
*/
|
|
makeDefault = changeVal && (source <= PGC_S_OVERRIDE) && (value != NULL);
|
|
|
|
/*
|
|
* Ignore attempted set if overridden by previously processed setting.
|
|
* However, if changeVal is false then plow ahead anyway since we are
|
|
* trying to find out if the value is potentially good, not actually
|
|
* use it. Also keep going if makeDefault is true, since we may want
|
|
* to set the reset/stacked values even if we can't set the variable
|
|
* itself.
|
|
*/
|
|
if (record->source > source)
|
|
{
|
|
if (changeVal && !makeDefault)
|
|
{
|
|
elog(DEBUG3, "\"%s\": setting ignored because previous source is higher priority",
|
|
name);
|
|
return true;
|
|
}
|
|
changeVal = false; /* this might be reset in USERLIMIT */
|
|
}
|
|
|
|
/*
|
|
* Evaluate value and set variable.
|
|
* USERLIMIT checks two things: 1) is the user making a change
|
|
* that is blocked by an administrator setting. 2) is the administrator
|
|
* changing a setting and doing a SIGHUP that requires us to override
|
|
* a user setting.
|
|
*/
|
|
switch (record->vartype)
|
|
{
|
|
case PGC_BOOL:
|
|
{
|
|
struct config_bool *conf = (struct config_bool *) record;
|
|
bool newval;
|
|
|
|
if (value)
|
|
{
|
|
if (!parse_bool(value, &newval))
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("parameter \"%s\" requires a Boolean value",
|
|
name)));
|
|
return false;
|
|
}
|
|
if (record->context == PGC_USERLIMIT)
|
|
{
|
|
if (newval < conf->reset_val)
|
|
{
|
|
/* Limit non-superuser changes */
|
|
if (source > PGC_S_UNPRIVILEGED && !superuser())
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
|
|
errmsg("permission denied to set parameter \"%s\"",
|
|
name),
|
|
errhint("must be superuser to change this value to false")));
|
|
return false;
|
|
}
|
|
}
|
|
if (newval > *conf->variable)
|
|
{
|
|
/* Allow change if admin should override */
|
|
if (source < PGC_S_UNPRIVILEGED &&
|
|
record->source > PGC_S_UNPRIVILEGED &&
|
|
!superuser())
|
|
changeVal = changeValOrig;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
newval = conf->reset_val;
|
|
source = conf->gen.reset_source;
|
|
}
|
|
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (newval, changeVal, source))
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("invalid value for parameter \"%s\": %d",
|
|
name, (int) newval)));
|
|
return false;
|
|
}
|
|
|
|
if (changeVal || makeDefault)
|
|
{
|
|
/* Save old value to support transaction abort */
|
|
if (!makeDefault)
|
|
push_old_value(&conf->gen);
|
|
if (changeVal)
|
|
{
|
|
*conf->variable = newval;
|
|
conf->gen.source = source;
|
|
}
|
|
if (makeDefault)
|
|
{
|
|
GucStack *stack;
|
|
|
|
if (conf->gen.reset_source <= source)
|
|
{
|
|
conf->reset_val = newval;
|
|
conf->gen.reset_source = source;
|
|
}
|
|
for (stack = conf->gen.stack; stack; stack = stack->prev)
|
|
{
|
|
if (stack->source <= source)
|
|
{
|
|
stack->value.boolval = newval;
|
|
stack->source = source;
|
|
}
|
|
}
|
|
}
|
|
else if (isLocal)
|
|
{
|
|
conf->gen.status |= GUC_HAVE_LOCAL;
|
|
guc_dirty = true;
|
|
}
|
|
else
|
|
{
|
|
conf->tentative_val = newval;
|
|
conf->gen.tentative_source = source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
guc_dirty = true;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PGC_INT:
|
|
{
|
|
struct config_int *conf = (struct config_int *) record;
|
|
int newval;
|
|
|
|
if (value)
|
|
{
|
|
if (!parse_int(value, &newval))
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("parameter \"%s\" requires an integer value",
|
|
name)));
|
|
return false;
|
|
}
|
|
if (newval < conf->min || newval > conf->max)
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("%d is outside the valid range for parameter \"%s\" (%d .. %d)",
|
|
newval, name, conf->min, conf->max)));
|
|
return false;
|
|
}
|
|
if (record->context == PGC_USERLIMIT)
|
|
{
|
|
/* handle log_min_duration_statement, -1=disable */
|
|
if ((newval != -1 && conf->reset_val != -1 &&
|
|
newval > conf->reset_val) || /* increase duration */
|
|
(newval == -1 && conf->reset_val != -1)) /* turn off */
|
|
{
|
|
/* Limit non-superuser changes */
|
|
if (source > PGC_S_UNPRIVILEGED && !superuser())
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
|
|
errmsg("permission denied to set parameter \"%s\"",
|
|
name),
|
|
errhint("Must be superuser to increase this value or turn it off.")));
|
|
return false;
|
|
}
|
|
}
|
|
/* Allow change if admin should override */
|
|
if ((newval != -1 && *conf->variable != -1 &&
|
|
newval < *conf->variable) || /* decrease duration */
|
|
(newval != -1 && *conf->variable == -1)) /* turn on */
|
|
{
|
|
if (source < PGC_S_UNPRIVILEGED &&
|
|
record->source > PGC_S_UNPRIVILEGED &&
|
|
!superuser())
|
|
changeVal = changeValOrig;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
newval = conf->reset_val;
|
|
source = conf->gen.reset_source;
|
|
}
|
|
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (newval, changeVal, source))
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("invalid value for parameter \"%s\": %d",
|
|
name, newval)));
|
|
return false;
|
|
}
|
|
|
|
if (changeVal || makeDefault)
|
|
{
|
|
/* Save old value to support transaction abort */
|
|
if (!makeDefault)
|
|
push_old_value(&conf->gen);
|
|
if (changeVal)
|
|
{
|
|
*conf->variable = newval;
|
|
conf->gen.source = source;
|
|
}
|
|
if (makeDefault)
|
|
{
|
|
GucStack *stack;
|
|
|
|
if (conf->gen.reset_source <= source)
|
|
{
|
|
conf->reset_val = newval;
|
|
conf->gen.reset_source = source;
|
|
}
|
|
for (stack = conf->gen.stack; stack; stack = stack->prev)
|
|
{
|
|
if (stack->source <= source)
|
|
{
|
|
stack->value.intval = newval;
|
|
stack->source = source;
|
|
}
|
|
}
|
|
}
|
|
else if (isLocal)
|
|
{
|
|
conf->gen.status |= GUC_HAVE_LOCAL;
|
|
guc_dirty = true;
|
|
}
|
|
else
|
|
{
|
|
conf->tentative_val = newval;
|
|
conf->gen.tentative_source = source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
guc_dirty = true;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PGC_REAL:
|
|
{
|
|
struct config_real *conf = (struct config_real *) record;
|
|
double newval;
|
|
|
|
if (value)
|
|
{
|
|
if (!parse_real(value, &newval))
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("parameter \"%s\" requires a numeric value",
|
|
name)));
|
|
return false;
|
|
}
|
|
if (newval < conf->min || newval > conf->max)
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("%g is outside the valid range for parameter \"%s\" (%g .. %g)",
|
|
newval, name, conf->min, conf->max)));
|
|
return false;
|
|
}
|
|
if (record->context == PGC_USERLIMIT)
|
|
/* No REAL PGC_USERLIMIT */
|
|
{
|
|
/* Limit non-superuser changes */
|
|
if (source > PGC_S_UNPRIVILEGED && !superuser())
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
|
|
errmsg("permission denied to set parameter \"%s\"",
|
|
name),
|
|
errhint("Must be superuser to increase this value or turn it off.")));
|
|
return false;
|
|
}
|
|
/* Allow change if admin should override */
|
|
if (source < PGC_S_UNPRIVILEGED &&
|
|
record->source > PGC_S_UNPRIVILEGED &&
|
|
!superuser())
|
|
changeVal = false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
newval = conf->reset_val;
|
|
source = conf->gen.reset_source;
|
|
}
|
|
|
|
if (conf->assign_hook)
|
|
if (!(*conf->assign_hook) (newval, changeVal, source))
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("invalid value for parameter \"%s\": %g",
|
|
name, newval)));
|
|
return false;
|
|
}
|
|
|
|
if (changeVal || makeDefault)
|
|
{
|
|
/* Save old value to support transaction abort */
|
|
if (!makeDefault)
|
|
push_old_value(&conf->gen);
|
|
if (changeVal)
|
|
{
|
|
*conf->variable = newval;
|
|
conf->gen.source = source;
|
|
}
|
|
if (makeDefault)
|
|
{
|
|
GucStack *stack;
|
|
|
|
if (conf->gen.reset_source <= source)
|
|
{
|
|
conf->reset_val = newval;
|
|
conf->gen.reset_source = source;
|
|
}
|
|
for (stack = conf->gen.stack; stack; stack = stack->prev)
|
|
{
|
|
if (stack->source <= source)
|
|
{
|
|
stack->value.realval = newval;
|
|
stack->source = source;
|
|
}
|
|
}
|
|
}
|
|
else if (isLocal)
|
|
{
|
|
conf->gen.status |= GUC_HAVE_LOCAL;
|
|
guc_dirty = true;
|
|
}
|
|
else
|
|
{
|
|
conf->tentative_val = newval;
|
|
conf->gen.tentative_source = source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
guc_dirty = true;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PGC_STRING:
|
|
{
|
|
struct config_string *conf = (struct config_string *) record;
|
|
char *newval;
|
|
|
|
if (value)
|
|
{
|
|
newval = guc_strdup(elevel, value);
|
|
if (newval == NULL)
|
|
return false;
|
|
|
|
if (record->context == PGC_USERLIMIT)
|
|
{
|
|
int var_value, reset_value, new_value;
|
|
const char * (*var_hook) (int *var, const char *newval,
|
|
bool doit, GucSource source);
|
|
|
|
if (conf->assign_hook == assign_log_statement)
|
|
var_hook = assign_log_stmtlvl;
|
|
else
|
|
var_hook = assign_msglvl;
|
|
|
|
(*var_hook) (&new_value, newval, true, source);
|
|
(*var_hook) (&reset_value, conf->reset_val, true,
|
|
source);
|
|
(*var_hook) (&var_value, *conf->variable, true,
|
|
source);
|
|
|
|
/* Limit non-superuser changes */
|
|
if (new_value > reset_value)
|
|
{
|
|
/* Limit non-superuser changes */
|
|
if (source > PGC_S_UNPRIVILEGED && !superuser())
|
|
{
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
|
|
errmsg("permission denied to set parameter \"%s\"",
|
|
name),
|
|
errhint("Must be superuser to increase this value.")));
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/* Allow change if admin should override */
|
|
if (new_value < var_value)
|
|
{
|
|
if (source < PGC_S_UNPRIVILEGED &&
|
|
record->source > PGC_S_UNPRIVILEGED &&
|
|
!superuser())
|
|
changeVal = changeValOrig;
|
|
}
|
|
}
|
|
}
|
|
else if (conf->reset_val)
|
|
{
|
|
/*
|
|
* We could possibly avoid strdup here, but easier to
|
|
* make this case work the same as the normal
|
|
* assignment case.
|
|
*/
|
|
newval = guc_strdup(elevel, conf->reset_val);
|
|
if (newval == NULL)
|
|
return false;
|
|
source = conf->gen.reset_source;
|
|
}
|
|
else
|
|
{
|
|
/* Nothing to reset to, as yet; so do nothing */
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Remember string in workspace, so that we can free it
|
|
* and avoid a permanent memory leak if hook ereports.
|
|
*/
|
|
if (guc_string_workspace)
|
|
free(guc_string_workspace);
|
|
guc_string_workspace = newval;
|
|
|
|
if (conf->assign_hook)
|
|
{
|
|
const char *hookresult;
|
|
|
|
hookresult = (*conf->assign_hook) (newval,
|
|
changeVal, source);
|
|
guc_string_workspace = NULL;
|
|
if (hookresult == NULL)
|
|
{
|
|
free(newval);
|
|
ereport(elevel,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("invalid value for parameter \"%s\": \"%s\"",
|
|
name, value ? value : "")));
|
|
return false;
|
|
}
|
|
else if (hookresult != newval)
|
|
{
|
|
free(newval);
|
|
|
|
/*
|
|
* Having to cast away const here is annoying, but
|
|
* the alternative is to declare assign_hooks as
|
|
* returning char*, which would mean they'd have
|
|
* to cast away const, or as both taking and
|
|
* returning char*, which doesn't seem attractive
|
|
* either --- we don't want them to scribble on
|
|
* the passed str.
|
|
*/
|
|
newval = (char *) hookresult;
|
|
}
|
|
}
|
|
|
|
guc_string_workspace = NULL;
|
|
|
|
if (changeVal || makeDefault)
|
|
{
|
|
/* Save old value to support transaction abort */
|
|
if (!makeDefault)
|
|
push_old_value(&conf->gen);
|
|
if (changeVal)
|
|
{
|
|
set_string_field(conf, conf->variable, newval);
|
|
conf->gen.source = source;
|
|
}
|
|
if (makeDefault)
|
|
{
|
|
GucStack *stack;
|
|
|
|
if (conf->gen.reset_source <= source)
|
|
{
|
|
set_string_field(conf, &conf->reset_val, newval);
|
|
conf->gen.reset_source = source;
|
|
}
|
|
for (stack = conf->gen.stack; stack; stack = stack->prev)
|
|
{
|
|
if (stack->source <= source)
|
|
{
|
|
set_string_field(conf, &stack->value.stringval,
|
|
newval);
|
|
stack->source = source;
|
|
}
|
|
}
|
|
/* Perhaps we didn't install newval anywhere */
|
|
if (!string_field_used(conf, newval))
|
|
free(newval);
|
|
}
|
|
else if (isLocal)
|
|
{
|
|
conf->gen.status |= GUC_HAVE_LOCAL;
|
|
guc_dirty = true;
|
|
}
|
|
else
|
|
{
|
|
set_string_field(conf, &conf->tentative_val, newval);
|
|
conf->gen.tentative_source = source;
|
|
conf->gen.status |= GUC_HAVE_TENTATIVE;
|
|
guc_dirty = true;
|
|
}
|
|
}
|
|
else
|
|
free(newval);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (changeVal && (record->flags & GUC_REPORT))
|
|
ReportGUCOption(record);
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Set a config option to the given value. See also set_config_option,
|
|
* this is just the wrapper to be called from outside GUC. NB: this
|
|
* is used only for non-transactional operations.
|
|
*/
|
|
void
|
|
SetConfigOption(const char *name, const char *value,
|
|
GucContext context, GucSource source)
|
|
{
|
|
(void) set_config_option(name, value, context, source, false, true);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Fetch the current value of the option `name'. If the option doesn't exist,
|
|
* throw an ereport and don't return.
|
|
*
|
|
* The string is *not* allocated for modification and is really only
|
|
* valid until the next call to configuration related functions.
|
|
*/
|
|
const char *
|
|
GetConfigOption(const char *name)
|
|
{
|
|
struct config_generic *record;
|
|
static char buffer[256];
|
|
|
|
record = find_option(name, ERROR);
|
|
if (record == NULL)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_OBJECT),
|
|
errmsg("unrecognized configuration parameter \"%s\"", name)));
|
|
|
|
switch (record->vartype)
|
|
{
|
|
case PGC_BOOL:
|
|
return *((struct config_bool *) record)->variable ? "on" : "off";
|
|
|
|
case PGC_INT:
|
|
snprintf(buffer, sizeof(buffer), "%d",
|
|
*((struct config_int *) record)->variable);
|
|
return buffer;
|
|
|
|
case PGC_REAL:
|
|
snprintf(buffer, sizeof(buffer), "%g",
|
|
*((struct config_real *) record)->variable);
|
|
return buffer;
|
|
|
|
case PGC_STRING:
|
|
return *((struct config_string *) record)->variable;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Get the RESET value associated with the given option.
|
|
*/
|
|
const char *
|
|
GetConfigOptionResetString(const char *name)
|
|
{
|
|
struct config_generic *record;
|
|
static char buffer[256];
|
|
|
|
record = find_option(name, ERROR);
|
|
if (record == NULL)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_OBJECT),
|
|
errmsg("unrecognized configuration parameter \"%s\"", name)));
|
|
|
|
switch (record->vartype)
|
|
{
|
|
case PGC_BOOL:
|
|
return ((struct config_bool *) record)->reset_val ? "on" : "off";
|
|
|
|
case PGC_INT:
|
|
snprintf(buffer, sizeof(buffer), "%d",
|
|
((struct config_int *) record)->reset_val);
|
|
return buffer;
|
|
|
|
case PGC_REAL:
|
|
snprintf(buffer, sizeof(buffer), "%g",
|
|
((struct config_real *) record)->reset_val);
|
|
return buffer;
|
|
|
|
case PGC_STRING:
|
|
return ((struct config_string *) record)->reset_val;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* flatten_set_variable_args
|
|
* Given a parsenode List as emitted by the grammar for SET,
|
|
* convert to the flat string representation used by GUC.
|
|
*
|
|
* We need to be told the name of the variable the args are for, because
|
|
* the flattening rules vary (ugh).
|
|
*
|
|
* The result is NULL if input is NIL (ie, SET ... TO DEFAULT), otherwise
|
|
* a palloc'd string.
|
|
*/
|
|
char *
|
|
flatten_set_variable_args(const char *name, List *args)
|
|
{
|
|
struct config_generic *record;
|
|
int flags;
|
|
StringInfoData buf;
|
|
ListCell *l;
|
|
|
|
/*
|
|
* Fast path if just DEFAULT. We do not check the variable name in
|
|
* this case --- necessary for RESET ALL to work correctly.
|
|
*/
|
|
if (args == NIL)
|
|
return NULL;
|
|
|
|
/* Else get flags for the variable */
|
|
record = find_option(name, ERROR);
|
|
if (record == NULL)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_OBJECT),
|
|
errmsg("unrecognized configuration parameter \"%s\"", name)));
|
|
|
|
flags = record->flags;
|
|
|
|
/* Complain if list input and non-list variable */
|
|
if ((flags & GUC_LIST_INPUT) == 0 &&
|
|
list_length(args) != 1)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("SET %s takes only one argument", name)));
|
|
|
|
initStringInfo(&buf);
|
|
|
|
foreach(l, args)
|
|
{
|
|
A_Const *arg = (A_Const *) lfirst(l);
|
|
char *val;
|
|
|
|
if (l != list_head(args))
|
|
appendStringInfo(&buf, ", ");
|
|
|
|
if (!IsA(arg, A_Const))
|
|
elog(ERROR, "unrecognized node type: %d", (int) nodeTag(arg));
|
|
|
|
switch (nodeTag(&arg->val))
|
|
{
|
|
case T_Integer:
|
|
appendStringInfo(&buf, "%ld", intVal(&arg->val));
|
|
break;
|
|
case T_Float:
|
|
/* represented as a string, so just copy it */
|
|
appendStringInfoString(&buf, strVal(&arg->val));
|
|
break;
|
|
case T_String:
|
|
val = strVal(&arg->val);
|
|
if (arg->typename != NULL)
|
|
{
|
|
/*
|
|
* Must be a ConstInterval argument for TIME ZONE.
|
|
* Coerce to interval and back to normalize the value
|
|
* and account for any typmod.
|
|
*/
|
|
Datum interval;
|
|
char *intervalout;
|
|
|
|
interval =
|
|
DirectFunctionCall3(interval_in,
|
|
CStringGetDatum(val),
|
|
ObjectIdGetDatum(InvalidOid),
|
|
Int32GetDatum(arg->typename->typmod));
|
|
|
|
intervalout =
|
|
DatumGetCString(DirectFunctionCall3(interval_out,
|
|
interval,
|
|
ObjectIdGetDatum(InvalidOid),
|
|
Int32GetDatum(-1)));
|
|
appendStringInfo(&buf, "INTERVAL '%s'", intervalout);
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Plain string literal or identifier. For quote
|
|
* mode, quote it if it's not a vanilla identifier.
|
|
*/
|
|
if (flags & GUC_LIST_QUOTE)
|
|
appendStringInfoString(&buf, quote_identifier(val));
|
|
else
|
|
appendStringInfoString(&buf, val);
|
|
}
|
|
break;
|
|
default:
|
|
elog(ERROR, "unrecognized node type: %d",
|
|
(int) nodeTag(&arg->val));
|
|
break;
|
|
}
|
|
}
|
|
|
|
return buf.data;
|
|
}
|
|
|
|
|
|
/*
|
|
* SET command
|
|
*/
|
|
void
|
|
SetPGVariable(const char *name, List *args, bool is_local)
|
|
{
|
|
char *argstring = flatten_set_variable_args(name, args);
|
|
|
|
/* Note SET DEFAULT (argstring == NULL) is equivalent to RESET */
|
|
set_config_option(name,
|
|
argstring,
|
|
(superuser() ? PGC_SUSET : PGC_USERSET),
|
|
PGC_S_SESSION,
|
|
is_local,
|
|
true);
|
|
}
|
|
|
|
/*
|
|
* SET command wrapped as a SQL callable function.
|
|
*/
|
|
Datum
|
|
set_config_by_name(PG_FUNCTION_ARGS)
|
|
{
|
|
char *name;
|
|
char *value;
|
|
char *new_value;
|
|
bool is_local;
|
|
text *result_text;
|
|
|
|
if (PG_ARGISNULL(0))
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED),
|
|
errmsg("SET requires parameter name")));
|
|
|
|
/* Get the GUC variable name */
|
|
name = DatumGetCString(DirectFunctionCall1(textout, PG_GETARG_DATUM(0)));
|
|
|
|
/* Get the desired value or set to NULL for a reset request */
|
|
if (PG_ARGISNULL(1))
|
|
value = NULL;
|
|
else
|
|
value = DatumGetCString(DirectFunctionCall1(textout, PG_GETARG_DATUM(1)));
|
|
|
|
/*
|
|
* Get the desired state of is_local. Default to false if provided
|
|
* value is NULL
|
|
*/
|
|
if (PG_ARGISNULL(2))
|
|
is_local = false;
|
|
else
|
|
is_local = PG_GETARG_BOOL(2);
|
|
|
|
/* Note SET DEFAULT (argstring == NULL) is equivalent to RESET */
|
|
set_config_option(name,
|
|
value,
|
|
(superuser() ? PGC_SUSET : PGC_USERSET),
|
|
PGC_S_SESSION,
|
|
is_local,
|
|
true);
|
|
|
|
/* get the new current value */
|
|
new_value = GetConfigOptionByName(name, NULL);
|
|
|
|
/* Convert return string to text */
|
|
result_text = DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(new_value)));
|
|
|
|
/* return it */
|
|
PG_RETURN_TEXT_P(result_text);
|
|
}
|
|
|
|
static void
|
|
define_custom_variable(struct config_generic* variable)
|
|
{
|
|
const char* name = variable->name;
|
|
const char** nameAddr = &name;
|
|
const char* value;
|
|
struct config_string* pHolder;
|
|
struct config_generic** res = (struct config_generic**)bsearch(
|
|
(void*)&nameAddr,
|
|
(void*)guc_variables,
|
|
num_guc_variables,
|
|
sizeof(struct config_generic*),
|
|
guc_var_compare);
|
|
|
|
if(res == NULL)
|
|
{
|
|
add_guc_variable(variable, ERROR);
|
|
return;
|
|
}
|
|
|
|
/* This better be a placeholder
|
|
*/
|
|
if(((*res)->flags & GUC_CUSTOM_PLACEHOLDER) == 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INTERNAL_ERROR),
|
|
errmsg("attempt to redefine parameter \"%s\"", name)));
|
|
|
|
Assert((*res)->vartype == PGC_STRING);
|
|
pHolder = (struct config_string*) *res;
|
|
|
|
/* We have the same name, no sorting is necessary */
|
|
*res = variable;
|
|
|
|
value = *pHolder->variable;
|
|
|
|
/*
|
|
* Assign the string value stored in the placeholder to the real variable.
|
|
*
|
|
* XXX this is not really good enough --- it should be a nontransactional
|
|
* assignment, since we don't want it to roll back if the current xact
|
|
* fails later.
|
|
*/
|
|
set_config_option(name, value,
|
|
pHolder->gen.context, pHolder->gen.source,
|
|
false, true);
|
|
|
|
/*
|
|
* Free up as much as we conveniently can of the placeholder structure
|
|
* (this neglects any stack items...)
|
|
*/
|
|
set_string_field(pHolder, pHolder->variable, NULL);
|
|
set_string_field(pHolder, &pHolder->reset_val, NULL);
|
|
set_string_field(pHolder, &pHolder->tentative_val, NULL);
|
|
|
|
free(pHolder);
|
|
}
|
|
|
|
static void init_custom_variable(
|
|
struct config_generic* gen,
|
|
const char* name,
|
|
const char* short_desc,
|
|
const char* long_desc,
|
|
GucContext context,
|
|
enum config_type type)
|
|
{
|
|
gen->name = guc_strdup(ERROR, name);
|
|
gen->context = context;
|
|
gen->group = CUSTOM_OPTIONS;
|
|
gen->short_desc = short_desc;
|
|
gen->long_desc = long_desc;
|
|
gen->vartype = type;
|
|
}
|
|
|
|
void DefineCustomBoolVariable(
|
|
const char* name,
|
|
const char* short_desc,
|
|
const char* long_desc,
|
|
bool* valueAddr,
|
|
GucContext context,
|
|
GucBoolAssignHook assign_hook,
|
|
GucShowHook show_hook)
|
|
{
|
|
size_t sz = sizeof(struct config_bool);
|
|
struct config_bool* var = (struct config_bool*)guc_malloc(ERROR, sz);
|
|
|
|
memset(var, 0, sz);
|
|
init_custom_variable(&var->gen, name, short_desc, long_desc, context, PGC_BOOL);
|
|
|
|
var->variable = valueAddr;
|
|
var->reset_val = *valueAddr;
|
|
var->assign_hook = assign_hook;
|
|
var->show_hook = show_hook;
|
|
define_custom_variable(&var->gen);
|
|
}
|
|
|
|
void DefineCustomIntVariable(
|
|
const char* name,
|
|
const char* short_desc,
|
|
const char* long_desc,
|
|
int* valueAddr,
|
|
GucContext context,
|
|
GucIntAssignHook assign_hook,
|
|
GucShowHook show_hook)
|
|
{
|
|
size_t sz = sizeof(struct config_int);
|
|
struct config_int* var = (struct config_int*)guc_malloc(ERROR, sz);
|
|
|
|
memset(var, 0, sz);
|
|
init_custom_variable(&var->gen, name, short_desc, long_desc, context, PGC_INT);
|
|
|
|
var->variable = valueAddr;
|
|
var->reset_val = *valueAddr;
|
|
var->assign_hook = assign_hook;
|
|
var->show_hook = show_hook;
|
|
define_custom_variable(&var->gen);
|
|
}
|
|
|
|
void DefineCustomRealVariable(
|
|
const char* name,
|
|
const char* short_desc,
|
|
const char* long_desc,
|
|
double* valueAddr,
|
|
GucContext context,
|
|
GucRealAssignHook assign_hook,
|
|
GucShowHook show_hook)
|
|
{
|
|
size_t sz = sizeof(struct config_real);
|
|
struct config_real* var = (struct config_real*)guc_malloc(ERROR, sz);
|
|
|
|
memset(var, 0, sz);
|
|
init_custom_variable(&var->gen, name, short_desc, long_desc, context, PGC_REAL);
|
|
|
|
var->variable = valueAddr;
|
|
var->reset_val = *valueAddr;
|
|
var->assign_hook = assign_hook;
|
|
var->show_hook = show_hook;
|
|
define_custom_variable(&var->gen);
|
|
}
|
|
|
|
void DefineCustomStringVariable(
|
|
const char* name,
|
|
const char* short_desc,
|
|
const char* long_desc,
|
|
char** valueAddr,
|
|
GucContext context,
|
|
GucStringAssignHook assign_hook,
|
|
GucShowHook show_hook)
|
|
{
|
|
size_t sz = sizeof(struct config_string);
|
|
struct config_string* var = (struct config_string*)guc_malloc(ERROR, sz);
|
|
|
|
memset(var, 0, sz);
|
|
init_custom_variable(&var->gen, name, short_desc, long_desc, context, PGC_STRING);
|
|
|
|
var->variable = valueAddr;
|
|
var->reset_val = *valueAddr;
|
|
var->assign_hook = assign_hook;
|
|
var->show_hook = show_hook;
|
|
define_custom_variable(&var->gen);
|
|
}
|
|
|
|
extern void EmitWarningsOnPlaceholders(const char* className)
|
|
{
|
|
struct config_generic** vars = guc_variables;
|
|
struct config_generic** last = vars + num_guc_variables;
|
|
|
|
int nameLen = strlen(className);
|
|
while(vars < last)
|
|
{
|
|
struct config_generic* var = *vars++;
|
|
if((var->flags & GUC_CUSTOM_PLACEHOLDER) != 0 &&
|
|
strncmp(className, var->name, nameLen) == 0 &&
|
|
var->name[nameLen] == GUC_QUALIFIER_SEPARATOR)
|
|
{
|
|
ereport(INFO,
|
|
(errcode(ERRCODE_UNDEFINED_OBJECT),
|
|
errmsg("unrecognized configuration parameter \"%s\"", var->name)));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* SHOW command
|
|
*/
|
|
void
|
|
GetPGVariable(const char *name, DestReceiver *dest)
|
|
{
|
|
if (pg_strcasecmp(name, "all") == 0)
|
|
ShowAllGUCConfig(dest);
|
|
else
|
|
ShowGUCConfigOption(name, dest);
|
|
}
|
|
|
|
TupleDesc
|
|
GetPGVariableResultDesc(const char *name)
|
|
{
|
|
TupleDesc tupdesc;
|
|
|
|
if (pg_strcasecmp(name, "all") == 0)
|
|
{
|
|
/* need a tuple descriptor representing two TEXT columns */
|
|
tupdesc = CreateTemplateTupleDesc(2, false);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
|
|
TEXTOID, -1, 0);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
|
|
TEXTOID, -1, 0);
|
|
}
|
|
else
|
|
{
|
|
const char *varname;
|
|
|
|
/* Get the canonical spelling of name */
|
|
(void) GetConfigOptionByName(name, &varname);
|
|
|
|
/* need a tuple descriptor representing a single TEXT column */
|
|
tupdesc = CreateTemplateTupleDesc(1, false);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 1, varname,
|
|
TEXTOID, -1, 0);
|
|
}
|
|
return tupdesc;
|
|
}
|
|
|
|
/*
|
|
* RESET command
|
|
*/
|
|
void
|
|
ResetPGVariable(const char *name)
|
|
{
|
|
if (pg_strcasecmp(name, "all") == 0)
|
|
ResetAllOptions();
|
|
else
|
|
set_config_option(name,
|
|
NULL,
|
|
(superuser() ? PGC_SUSET : PGC_USERSET),
|
|
PGC_S_SESSION,
|
|
false,
|
|
true);
|
|
}
|
|
|
|
|
|
/*
|
|
* SHOW command
|
|
*/
|
|
void
|
|
ShowGUCConfigOption(const char *name, DestReceiver *dest)
|
|
{
|
|
TupOutputState *tstate;
|
|
TupleDesc tupdesc;
|
|
const char *varname;
|
|
char *value;
|
|
|
|
/* Get the value and canonical spelling of name */
|
|
value = GetConfigOptionByName(name, &varname);
|
|
|
|
/* need a tuple descriptor representing a single TEXT column */
|
|
tupdesc = CreateTemplateTupleDesc(1, false);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 1, varname,
|
|
TEXTOID, -1, 0);
|
|
|
|
/* prepare for projection of tuples */
|
|
tstate = begin_tup_output_tupdesc(dest, tupdesc);
|
|
|
|
/* Send it */
|
|
do_text_output_oneline(tstate, value);
|
|
|
|
end_tup_output(tstate);
|
|
}
|
|
|
|
/*
|
|
* SHOW ALL command
|
|
*/
|
|
void
|
|
ShowAllGUCConfig(DestReceiver *dest)
|
|
{
|
|
int i;
|
|
TupOutputState *tstate;
|
|
TupleDesc tupdesc;
|
|
char *values[2];
|
|
|
|
/* need a tuple descriptor representing two TEXT columns */
|
|
tupdesc = CreateTemplateTupleDesc(2, false);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
|
|
TEXTOID, -1, 0);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
|
|
TEXTOID, -1, 0);
|
|
|
|
/* prepare for projection of tuples */
|
|
tstate = begin_tup_output_tupdesc(dest, tupdesc);
|
|
|
|
for (i = 0; i < num_guc_variables; i++)
|
|
{
|
|
struct config_generic *conf = guc_variables[i];
|
|
|
|
if (conf->flags & GUC_NO_SHOW_ALL)
|
|
continue;
|
|
|
|
/* assign to the values array */
|
|
values[0] = (char *) conf->name;
|
|
values[1] = _ShowOption(conf);
|
|
|
|
/* send it to dest */
|
|
do_tup_output(tstate, values);
|
|
|
|
/* clean up */
|
|
if (values[1] != NULL)
|
|
pfree(values[1]);
|
|
}
|
|
|
|
end_tup_output(tstate);
|
|
}
|
|
|
|
/*
|
|
* Return GUC variable value by name; optionally return canonical
|
|
* form of name. Return value is palloc'd.
|
|
*/
|
|
char *
|
|
GetConfigOptionByName(const char *name, const char **varname)
|
|
{
|
|
struct config_generic *record;
|
|
|
|
record = find_option(name, ERROR);
|
|
if (record == NULL)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_UNDEFINED_OBJECT),
|
|
errmsg("unrecognized configuration parameter \"%s\"", name)));
|
|
|
|
if (varname)
|
|
*varname = record->name;
|
|
|
|
return _ShowOption(record);
|
|
}
|
|
|
|
/*
|
|
* Return GUC variable value by variable number; optionally return canonical
|
|
* form of name. Return value is palloc'd.
|
|
*/
|
|
void
|
|
GetConfigOptionByNum(int varnum, const char **values, bool *noshow)
|
|
{
|
|
char buffer[256];
|
|
struct config_generic *conf;
|
|
|
|
/* check requested variable number valid */
|
|
Assert((varnum >= 0) && (varnum < num_guc_variables));
|
|
|
|
conf = guc_variables[varnum];
|
|
|
|
if (noshow)
|
|
*noshow = (conf->flags & GUC_NO_SHOW_ALL) ? true : false;
|
|
|
|
/* first get the generic attributes */
|
|
|
|
/* name */
|
|
values[0] = conf->name;
|
|
|
|
/* setting : use _ShowOption in order to avoid duplicating the logic */
|
|
values[1] = _ShowOption(conf);
|
|
|
|
/* group */
|
|
values[2] = config_group_names[conf->group];
|
|
|
|
/* short_desc */
|
|
values[3] = conf->short_desc;
|
|
|
|
/* extra_desc */
|
|
values[4] = conf->long_desc;
|
|
|
|
/* context */
|
|
values[5] = GucContext_Names[conf->context];
|
|
|
|
/* vartype */
|
|
values[6] = config_type_names[conf->vartype];
|
|
|
|
/* source */
|
|
values[7] = GucSource_Names[conf->source];
|
|
|
|
/* now get the type specifc attributes */
|
|
switch (conf->vartype)
|
|
{
|
|
case PGC_BOOL:
|
|
{
|
|
/* min_val */
|
|
values[8] = NULL;
|
|
|
|
/* max_val */
|
|
values[9] = NULL;
|
|
}
|
|
break;
|
|
|
|
case PGC_INT:
|
|
{
|
|
struct config_int *lconf = (struct config_int *) conf;
|
|
|
|
/* min_val */
|
|
snprintf(buffer, sizeof(buffer), "%d", lconf->min);
|
|
values[8] = pstrdup(buffer);
|
|
|
|
/* max_val */
|
|
snprintf(buffer, sizeof(buffer), "%d", lconf->max);
|
|
values[9] = pstrdup(buffer);
|
|
}
|
|
break;
|
|
|
|
case PGC_REAL:
|
|
{
|
|
struct config_real *lconf = (struct config_real *) conf;
|
|
|
|
/* min_val */
|
|
snprintf(buffer, sizeof(buffer), "%g", lconf->min);
|
|
values[8] = pstrdup(buffer);
|
|
|
|
/* max_val */
|
|
snprintf(buffer, sizeof(buffer), "%g", lconf->max);
|
|
values[9] = pstrdup(buffer);
|
|
}
|
|
break;
|
|
|
|
case PGC_STRING:
|
|
{
|
|
/* min_val */
|
|
values[8] = NULL;
|
|
|
|
/* max_val */
|
|
values[9] = NULL;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
{
|
|
/*
|
|
* should never get here, but in case we do, set 'em to
|
|
* NULL
|
|
*/
|
|
|
|
/* min_val */
|
|
values[8] = NULL;
|
|
|
|
/* max_val */
|
|
values[9] = NULL;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Return the total number of GUC variables
|
|
*/
|
|
int
|
|
GetNumConfigOptions(void)
|
|
{
|
|
return num_guc_variables;
|
|
}
|
|
|
|
/*
|
|
* show_config_by_name - equiv to SHOW X command but implemented as
|
|
* a function.
|
|
*/
|
|
Datum
|
|
show_config_by_name(PG_FUNCTION_ARGS)
|
|
{
|
|
char *varname;
|
|
char *varval;
|
|
text *result_text;
|
|
|
|
/* Get the GUC variable name */
|
|
varname = DatumGetCString(DirectFunctionCall1(textout, PG_GETARG_DATUM(0)));
|
|
|
|
/* Get the value */
|
|
varval = GetConfigOptionByName(varname, NULL);
|
|
|
|
/* Convert to text */
|
|
result_text = DatumGetTextP(DirectFunctionCall1(textin, CStringGetDatum(varval)));
|
|
|
|
/* return it */
|
|
PG_RETURN_TEXT_P(result_text);
|
|
}
|
|
|
|
/*
|
|
* show_all_settings - equiv to SHOW ALL command but implemented as
|
|
* a Table Function.
|
|
*/
|
|
#define NUM_PG_SETTINGS_ATTS 10
|
|
|
|
Datum
|
|
show_all_settings(PG_FUNCTION_ARGS)
|
|
{
|
|
FuncCallContext *funcctx;
|
|
TupleDesc tupdesc;
|
|
int call_cntr;
|
|
int max_calls;
|
|
AttInMetadata *attinmeta;
|
|
MemoryContext oldcontext;
|
|
|
|
/* stuff done only on the first call of the function */
|
|
if (SRF_IS_FIRSTCALL())
|
|
{
|
|
/* create a function context for cross-call persistence */
|
|
funcctx = SRF_FIRSTCALL_INIT();
|
|
|
|
/*
|
|
* switch to memory context appropriate for multiple function
|
|
* calls
|
|
*/
|
|
oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
|
|
|
|
/*
|
|
* need a tuple descriptor representing NUM_PG_SETTINGS_ATTS
|
|
* columns of the appropriate types
|
|
*/
|
|
tupdesc = CreateTemplateTupleDesc(NUM_PG_SETTINGS_ATTS, false);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 1, "name",
|
|
TEXTOID, -1, 0);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
|
|
TEXTOID, -1, 0);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 3, "category",
|
|
TEXTOID, -1, 0);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 4, "short_desc",
|
|
TEXTOID, -1, 0);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 5, "extra_desc",
|
|
TEXTOID, -1, 0);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 6, "context",
|
|
TEXTOID, -1, 0);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 7, "vartype",
|
|
TEXTOID, -1, 0);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 8, "source",
|
|
TEXTOID, -1, 0);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 9, "min_val",
|
|
TEXTOID, -1, 0);
|
|
TupleDescInitEntry(tupdesc, (AttrNumber) 10, "max_val",
|
|
TEXTOID, -1, 0);
|
|
|
|
/*
|
|
* Generate attribute metadata needed later to produce tuples from
|
|
* raw C strings
|
|
*/
|
|
attinmeta = TupleDescGetAttInMetadata(tupdesc);
|
|
funcctx->attinmeta = attinmeta;
|
|
|
|
/* total number of tuples to be returned */
|
|
funcctx->max_calls = GetNumConfigOptions();
|
|
|
|
MemoryContextSwitchTo(oldcontext);
|
|
}
|
|
|
|
/* stuff done on every call of the function */
|
|
funcctx = SRF_PERCALL_SETUP();
|
|
|
|
call_cntr = funcctx->call_cntr;
|
|
max_calls = funcctx->max_calls;
|
|
attinmeta = funcctx->attinmeta;
|
|
|
|
if (call_cntr < max_calls) /* do when there is more left to send */
|
|
{
|
|
char *values[NUM_PG_SETTINGS_ATTS];
|
|
bool noshow;
|
|
HeapTuple tuple;
|
|
Datum result;
|
|
|
|
/*
|
|
* Get the next visible GUC variable name and value
|
|
*/
|
|
do
|
|
{
|
|
GetConfigOptionByNum(call_cntr, (const char **) values, &noshow);
|
|
if (noshow)
|
|
{
|
|
/* bump the counter and get the next config setting */
|
|
call_cntr = ++funcctx->call_cntr;
|
|
|
|
/* make sure we haven't gone too far now */
|
|
if (call_cntr >= max_calls)
|
|
SRF_RETURN_DONE(funcctx);
|
|
}
|
|
} while (noshow);
|
|
|
|
/* build a tuple */
|
|
tuple = BuildTupleFromCStrings(attinmeta, values);
|
|
|
|
/* make the tuple into a datum */
|
|
result = HeapTupleGetDatum(tuple);
|
|
|
|
SRF_RETURN_NEXT(funcctx, result);
|
|
}
|
|
else
|
|
{
|
|
/* do when there is no more left */
|
|
SRF_RETURN_DONE(funcctx);
|
|
}
|
|
}
|
|
|
|
static char *
|
|
_ShowOption(struct config_generic * record)
|
|
{
|
|
char buffer[256];
|
|
const char *val;
|
|
|
|
switch (record->vartype)
|
|
{
|
|
case PGC_BOOL:
|
|
{
|
|
struct config_bool *conf = (struct config_bool *) record;
|
|
|
|
if (conf->show_hook)
|
|
val = (*conf->show_hook) ();
|
|
else
|
|
val = *conf->variable ? "on" : "off";
|
|
}
|
|
break;
|
|
|
|
case PGC_INT:
|
|
{
|
|
struct config_int *conf = (struct config_int *) record;
|
|
|
|
if (conf->show_hook)
|
|
val = (*conf->show_hook) ();
|
|
else
|
|
{
|
|
snprintf(buffer, sizeof(buffer), "%d",
|
|
*conf->variable);
|
|
val = buffer;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case PGC_REAL:
|
|
{
|
|
struct config_real *conf = (struct config_real *) record;
|
|
|
|
if (conf->show_hook)
|
|
val = (*conf->show_hook) ();
|
|
else
|
|
{
|
|
snprintf(buffer, sizeof(buffer), "%g",
|
|
*conf->variable);
|
|
val = buffer;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case PGC_STRING:
|
|
{
|
|
struct config_string *conf = (struct config_string *) record;
|
|
|
|
if (conf->show_hook)
|
|
val = (*conf->show_hook) ();
|
|
else if (*conf->variable && **conf->variable)
|
|
val = *conf->variable;
|
|
else
|
|
val = "unset";
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/* just to keep compiler quiet */
|
|
val = "???";
|
|
break;
|
|
}
|
|
|
|
return pstrdup(val);
|
|
}
|
|
|
|
|
|
#ifdef EXEC_BACKEND
|
|
/*
|
|
* This routine dumps out all non-default GUC options into a binary
|
|
* file that is read by all exec'ed backends. The format is:
|
|
*
|
|
* variable name, string, null terminated
|
|
* variable value, string, null terminated
|
|
* variable source, integer
|
|
*/
|
|
void
|
|
write_nondefault_variables(GucContext context)
|
|
{
|
|
int i;
|
|
char *new_filename,
|
|
*filename;
|
|
int elevel;
|
|
FILE *fp;
|
|
|
|
Assert(context == PGC_POSTMASTER || context == PGC_SIGHUP);
|
|
Assert(DataDir);
|
|
elevel = (context == PGC_SIGHUP) ? DEBUG4 : ERROR;
|
|
|
|
/*
|
|
* Open file
|
|
*/
|
|
new_filename = guc_malloc(elevel, strlen(DataDir) + strlen(CONFIG_EXEC_PARAMS) +
|
|
strlen(".new") + 2);
|
|
if(new_filename == NULL)
|
|
return;
|
|
|
|
filename = guc_malloc(elevel, strlen(DataDir) + strlen(CONFIG_EXEC_PARAMS) + 2);
|
|
if (filename == NULL)
|
|
{
|
|
free(new_filename);
|
|
return;
|
|
}
|
|
|
|
sprintf(new_filename, "%s/" CONFIG_EXEC_PARAMS ".new", DataDir);
|
|
sprintf(filename, "%s/" CONFIG_EXEC_PARAMS, DataDir);
|
|
|
|
fp = AllocateFile(new_filename, "w");
|
|
if (!fp)
|
|
{
|
|
free(new_filename);
|
|
free(filename);
|
|
ereport(elevel,
|
|
(errcode_for_file_access(),
|
|
errmsg("could not write to file \"%s\": %m", CONFIG_EXEC_PARAMS)));
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < num_guc_variables; i++)
|
|
{
|
|
struct config_generic *gconf = guc_variables[i];
|
|
|
|
if (gconf->source != PGC_S_DEFAULT)
|
|
{
|
|
fprintf(fp, "%s", gconf->name);
|
|
fputc(0, fp);
|
|
|
|
switch (gconf->vartype)
|
|
{
|
|
case PGC_BOOL:
|
|
{
|
|
struct config_bool *conf = (struct config_bool *) gconf;
|
|
|
|
if (*conf->variable == 0)
|
|
fprintf(fp, "false");
|
|
else
|
|
fprintf(fp, "true");
|
|
}
|
|
break;
|
|
|
|
case PGC_INT:
|
|
{
|
|
struct config_int *conf = (struct config_int *) gconf;
|
|
|
|
fprintf(fp, "%d", *conf->variable);
|
|
}
|
|
break;
|
|
|
|
case PGC_REAL:
|
|
{
|
|
struct config_real *conf = (struct config_real *) gconf;
|
|
|
|
/* Could lose precision here? */
|
|
fprintf(fp, "%f", *conf->variable);
|
|
}
|
|
break;
|
|
|
|
case PGC_STRING:
|
|
{
|
|
struct config_string *conf = (struct config_string *) gconf;
|
|
|
|
fprintf(fp, "%s", *conf->variable);
|
|
}
|
|
break;
|
|
}
|
|
|
|
fputc(0, fp);
|
|
|
|
fwrite(&gconf->source, sizeof(gconf->source), 1, fp);
|
|
}
|
|
}
|
|
|
|
if (FreeFile(fp))
|
|
{
|
|
free(new_filename);
|
|
free(filename);
|
|
ereport(elevel,
|
|
(errcode_for_file_access(),
|
|
errmsg("could not write to file \"%s\": %m", CONFIG_EXEC_PARAMS)));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Put new file in place. This could delay on Win32, but we don't hold
|
|
* any exclusive locks.
|
|
*/
|
|
rename(new_filename, filename);
|
|
free(new_filename);
|
|
free(filename);
|
|
}
|
|
|
|
|
|
/*
|
|
* Read string, including null byte from file
|
|
*
|
|
* Return NULL on EOF and nothing read
|
|
*/
|
|
static char *
|
|
read_string_with_null(FILE *fp)
|
|
{
|
|
int i = 0,
|
|
ch,
|
|
maxlen = 256;
|
|
char *str = NULL;
|
|
|
|
do
|
|
{
|
|
if ((ch = fgetc(fp)) == EOF)
|
|
{
|
|
if (i == 0)
|
|
return NULL;
|
|
else
|
|
elog(FATAL, "invalid format of exec config params file");
|
|
}
|
|
if (i == 0)
|
|
str = guc_malloc(FATAL, maxlen);
|
|
else if (i == maxlen)
|
|
str = guc_realloc(FATAL, str, maxlen *= 2);
|
|
str[i++] = ch;
|
|
} while (ch != 0);
|
|
|
|
return str;
|
|
}
|
|
|
|
|
|
/*
|
|
* This routine loads a previous postmaster dump of its non-default
|
|
* settings.
|
|
*/
|
|
void
|
|
read_nondefault_variables(void)
|
|
{
|
|
char *filename;
|
|
FILE *fp;
|
|
char *varname,
|
|
*varvalue;
|
|
int varsource;
|
|
|
|
Assert(DataDir);
|
|
|
|
/*
|
|
* Open file
|
|
*/
|
|
filename = guc_malloc(FATAL, strlen(DataDir) + strlen(CONFIG_EXEC_PARAMS) + 2);
|
|
sprintf(filename, "%s/" CONFIG_EXEC_PARAMS, DataDir);
|
|
|
|
fp = AllocateFile(filename, "r");
|
|
if (!fp)
|
|
{
|
|
free(filename);
|
|
/* File not found is fine */
|
|
if (errno != ENOENT)
|
|
ereport(FATAL,
|
|
(errcode_for_file_access(),
|
|
errmsg("could not read from file \"%s\": %m", CONFIG_EXEC_PARAMS)));
|
|
return;
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
struct config_generic *record;
|
|
|
|
if ((varname = read_string_with_null(fp)) == NULL)
|
|
break;
|
|
|
|
if ((record = find_option(varname, FATAL)) == NULL)
|
|
elog(FATAL, "failed to locate variable %s in exec config params file",varname);
|
|
if ((varvalue = read_string_with_null(fp)) == NULL)
|
|
elog(FATAL, "invalid format of exec config params file");
|
|
if (fread(&varsource, sizeof(varsource), 1, fp) == 0)
|
|
elog(FATAL, "invalid format of exec config params file");
|
|
|
|
(void) set_config_option(varname, varvalue, record->context,
|
|
varsource, false, true);
|
|
free(varname);
|
|
free(varvalue);
|
|
}
|
|
|
|
FreeFile(fp);
|
|
free(filename);
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
* A little "long argument" simulation, although not quite GNU
|
|
* compliant. Takes a string of the form "some-option=some value" and
|
|
* returns name = "some_option" and value = "some value" in malloc'ed
|
|
* storage. Note that '-' is converted to '_' in the option name. If
|
|
* there is no '=' in the input string then value will be NULL.
|
|
*/
|
|
void
|
|
ParseLongOption(const char *string, char **name, char **value)
|
|
{
|
|
size_t equal_pos;
|
|
char *cp;
|
|
|
|
AssertArg(string);
|
|
AssertArg(name);
|
|
AssertArg(value);
|
|
|
|
equal_pos = strcspn(string, "=");
|
|
|
|
if (string[equal_pos] == '=')
|
|
{
|
|
*name = guc_malloc(FATAL, equal_pos + 1);
|
|
strncpy(*name, string, equal_pos);
|
|
(*name)[equal_pos] = '\0';
|
|
|
|
*value = guc_strdup(FATAL, &string[equal_pos + 1]);
|
|
}
|
|
else
|
|
{
|
|
/* no equal sign in string */
|
|
*name = guc_strdup(FATAL, string);
|
|
*value = NULL;
|
|
}
|
|
|
|
for (cp = *name; *cp; cp++)
|
|
if (*cp == '-')
|
|
*cp = '_';
|
|
}
|
|
|
|
|
|
/*
|
|
* Handle options fetched from pg_database.datconfig or pg_shadow.useconfig.
|
|
* The array parameter must be an array of TEXT (it must not be NULL).
|
|
*/
|
|
void
|
|
ProcessGUCArray(ArrayType *array, GucSource source)
|
|
{
|
|
int i;
|
|
|
|
Assert(array != NULL);
|
|
Assert(ARR_ELEMTYPE(array) == TEXTOID);
|
|
Assert(ARR_NDIM(array) == 1);
|
|
Assert(ARR_LBOUND(array)[0] == 1);
|
|
Assert(source == PGC_S_DATABASE || source == PGC_S_USER);
|
|
|
|
for (i = 1; i <= ARR_DIMS(array)[0]; i++)
|
|
{
|
|
Datum d;
|
|
bool isnull;
|
|
char *s;
|
|
char *name;
|
|
char *value;
|
|
|
|
d = array_ref(array, 1, &i,
|
|
-1 /* varlenarray */ ,
|
|
-1 /* TEXT's typlen */ ,
|
|
false /* TEXT's typbyval */ ,
|
|
'i' /* TEXT's typalign */ ,
|
|
&isnull);
|
|
|
|
if (isnull)
|
|
continue;
|
|
|
|
s = DatumGetCString(DirectFunctionCall1(textout, d));
|
|
|
|
ParseLongOption(s, &name, &value);
|
|
if (!value)
|
|
{
|
|
ereport(WARNING,
|
|
(errcode(ERRCODE_SYNTAX_ERROR),
|
|
errmsg("could not parse setting for parameter \"%s\"", name)));
|
|
free(name);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* We process all these options at SUSET level. We assume that
|
|
* the right to insert an option into pg_database or pg_shadow was
|
|
* checked when it was inserted.
|
|
*/
|
|
SetConfigOption(name, value, PGC_SUSET, source);
|
|
|
|
free(name);
|
|
if (value)
|
|
free(value);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Add an entry to an option array. The array parameter may be NULL
|
|
* to indicate the current table entry is NULL.
|
|
*/
|
|
ArrayType *
|
|
GUCArrayAdd(ArrayType *array, const char *name, const char *value)
|
|
{
|
|
const char *varname;
|
|
Datum datum;
|
|
char *newval;
|
|
ArrayType *a;
|
|
|
|
Assert(name);
|
|
Assert(value);
|
|
|
|
/* test if the option is valid */
|
|
set_config_option(name, value,
|
|
superuser() ? PGC_SUSET : PGC_USERSET,
|
|
PGC_S_TEST, false, false);
|
|
|
|
/* convert name to canonical spelling, so we can use plain strcmp */
|
|
(void) GetConfigOptionByName(name, &varname);
|
|
name = varname;
|
|
|
|
newval = palloc(strlen(name) + 1 + strlen(value) + 1);
|
|
sprintf(newval, "%s=%s", name, value);
|
|
datum = DirectFunctionCall1(textin, CStringGetDatum(newval));
|
|
|
|
if (array)
|
|
{
|
|
int index;
|
|
bool isnull;
|
|
int i;
|
|
|
|
Assert(ARR_ELEMTYPE(array) == TEXTOID);
|
|
Assert(ARR_NDIM(array) == 1);
|
|
Assert(ARR_LBOUND(array)[0] == 1);
|
|
|
|
index = ARR_DIMS(array)[0] + 1; /* add after end */
|
|
|
|
for (i = 1; i <= ARR_DIMS(array)[0]; i++)
|
|
{
|
|
Datum d;
|
|
char *current;
|
|
|
|
d = array_ref(array, 1, &i,
|
|
-1 /* varlenarray */ ,
|
|
-1 /* TEXT's typlen */ ,
|
|
false /* TEXT's typbyval */ ,
|
|
'i' /* TEXT's typalign */ ,
|
|
&isnull);
|
|
if (isnull)
|
|
continue;
|
|
current = DatumGetCString(DirectFunctionCall1(textout, d));
|
|
if (strncmp(current, newval, strlen(name) + 1) == 0)
|
|
{
|
|
index = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
isnull = false;
|
|
a = array_set(array, 1, &index,
|
|
datum,
|
|
-1 /* varlenarray */ ,
|
|
-1 /* TEXT's typlen */ ,
|
|
false /* TEXT's typbyval */ ,
|
|
'i' /* TEXT's typalign */ ,
|
|
&isnull);
|
|
}
|
|
else
|
|
a = construct_array(&datum, 1,
|
|
TEXTOID,
|
|
-1, false, 'i');
|
|
|
|
return a;
|
|
}
|
|
|
|
|
|
/*
|
|
* Delete an entry from an option array. The array parameter may be NULL
|
|
* to indicate the current table entry is NULL. Also, if the return value
|
|
* is NULL then a null should be stored.
|
|
*/
|
|
ArrayType *
|
|
GUCArrayDelete(ArrayType *array, const char *name)
|
|
{
|
|
const char *varname;
|
|
ArrayType *newarray;
|
|
int i;
|
|
int index;
|
|
|
|
Assert(name);
|
|
|
|
/* test if the option is valid */
|
|
set_config_option(name, NULL,
|
|
superuser() ? PGC_SUSET : PGC_USERSET,
|
|
PGC_S_TEST, false, false);
|
|
|
|
/* convert name to canonical spelling, so we can use plain strcmp */
|
|
(void) GetConfigOptionByName(name, &varname);
|
|
name = varname;
|
|
|
|
/* if array is currently null, then surely nothing to delete */
|
|
if (!array)
|
|
return NULL;
|
|
|
|
newarray = NULL;
|
|
index = 1;
|
|
|
|
for (i = 1; i <= ARR_DIMS(array)[0]; i++)
|
|
{
|
|
Datum d;
|
|
char *val;
|
|
bool isnull;
|
|
|
|
d = array_ref(array, 1, &i,
|
|
-1 /* varlenarray */ ,
|
|
-1 /* TEXT's typlen */ ,
|
|
false /* TEXT's typbyval */ ,
|
|
'i' /* TEXT's typalign */ ,
|
|
&isnull);
|
|
if (isnull)
|
|
continue;
|
|
val = DatumGetCString(DirectFunctionCall1(textout, d));
|
|
|
|
/* ignore entry if it's what we want to delete */
|
|
if (strncmp(val, name, strlen(name)) == 0
|
|
&& val[strlen(name)] == '=')
|
|
continue;
|
|
|
|
/* else add it to the output array */
|
|
if (newarray)
|
|
{
|
|
isnull = false;
|
|
newarray = array_set(newarray, 1, &index,
|
|
d,
|
|
-1 /* varlenarray */ ,
|
|
-1 /* TEXT's typlen */ ,
|
|
false /* TEXT's typbyval */ ,
|
|
'i' /* TEXT's typalign */ ,
|
|
&isnull);
|
|
}
|
|
else
|
|
newarray = construct_array(&d, 1,
|
|
TEXTOID,
|
|
-1, false, 'i');
|
|
|
|
index++;
|
|
}
|
|
|
|
return newarray;
|
|
}
|
|
|
|
|
|
/*
|
|
* assign_hook subroutines
|
|
*/
|
|
|
|
static const char *
|
|
assign_log_destination(const char *value, bool doit, GucSource source)
|
|
{
|
|
char *rawstring;
|
|
List *elemlist;
|
|
ListCell *l;
|
|
int newlogdest = 0;
|
|
|
|
/* Need a modifiable copy of string */
|
|
rawstring = pstrdup(value);
|
|
|
|
/* Parse string into list of identifiers */
|
|
if (!SplitIdentifierString(rawstring, ',', &elemlist))
|
|
{
|
|
/* syntax error in list */
|
|
pfree(rawstring);
|
|
list_free(elemlist);
|
|
if (source >= PGC_S_INTERACTIVE)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("invalid list syntax for parameter \"log_destination\"")));
|
|
return NULL;
|
|
}
|
|
|
|
foreach(l, elemlist)
|
|
{
|
|
char *tok = (char *) lfirst(l);
|
|
|
|
if (pg_strcasecmp(tok,"stderr") == 0)
|
|
newlogdest |= LOG_DESTINATION_STDERR;
|
|
#ifdef HAVE_SYSLOG
|
|
else if (pg_strcasecmp(tok,"syslog") == 0)
|
|
newlogdest |= LOG_DESTINATION_SYSLOG;
|
|
#endif
|
|
#ifdef WIN32
|
|
else if (pg_strcasecmp(tok,"eventlog") == 0)
|
|
newlogdest |= LOG_DESTINATION_EVENTLOG;
|
|
#endif
|
|
else {
|
|
if (source >= PGC_S_INTERACTIVE)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("unrecognised \"log_destination\" key word: \"%s\"",
|
|
tok)));
|
|
pfree(rawstring);
|
|
list_free(elemlist);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (doit)
|
|
Log_destination = newlogdest;
|
|
|
|
pfree(rawstring);
|
|
list_free(elemlist);
|
|
|
|
return value;
|
|
}
|
|
|
|
#ifdef HAVE_SYSLOG
|
|
|
|
static const char *
|
|
assign_facility(const char *facility, bool doit, GucSource source)
|
|
{
|
|
if (pg_strcasecmp(facility, "LOCAL0") == 0)
|
|
return facility;
|
|
if (pg_strcasecmp(facility, "LOCAL1") == 0)
|
|
return facility;
|
|
if (pg_strcasecmp(facility, "LOCAL2") == 0)
|
|
return facility;
|
|
if (pg_strcasecmp(facility, "LOCAL3") == 0)
|
|
return facility;
|
|
if (pg_strcasecmp(facility, "LOCAL4") == 0)
|
|
return facility;
|
|
if (pg_strcasecmp(facility, "LOCAL5") == 0)
|
|
return facility;
|
|
if (pg_strcasecmp(facility, "LOCAL6") == 0)
|
|
return facility;
|
|
if (pg_strcasecmp(facility, "LOCAL7") == 0)
|
|
return facility;
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
|
|
static const char *
|
|
assign_defaultxactisolevel(const char *newval, bool doit, GucSource source)
|
|
{
|
|
if (pg_strcasecmp(newval, "serializable") == 0)
|
|
{
|
|
if (doit)
|
|
DefaultXactIsoLevel = XACT_SERIALIZABLE;
|
|
}
|
|
else if (pg_strcasecmp(newval, "repeatable read") == 0)
|
|
{
|
|
if (doit)
|
|
DefaultXactIsoLevel = XACT_REPEATABLE_READ;
|
|
}
|
|
else if (pg_strcasecmp(newval, "read committed") == 0)
|
|
{
|
|
if (doit)
|
|
DefaultXactIsoLevel = XACT_READ_COMMITTED;
|
|
}
|
|
else if (pg_strcasecmp(newval, "read uncommitted") == 0)
|
|
{
|
|
if (doit)
|
|
DefaultXactIsoLevel = XACT_READ_UNCOMMITTED;
|
|
}
|
|
else
|
|
return NULL;
|
|
return newval;
|
|
}
|
|
|
|
static const char *
|
|
assign_log_min_messages(const char *newval,
|
|
bool doit, GucSource source)
|
|
{
|
|
return (assign_msglvl(&log_min_messages, newval, doit, source));
|
|
}
|
|
|
|
static const char *
|
|
assign_client_min_messages(const char *newval, bool doit, GucSource source)
|
|
{
|
|
return (assign_msglvl(&client_min_messages, newval, doit, source));
|
|
}
|
|
|
|
static const char *
|
|
assign_min_error_statement(const char *newval, bool doit, GucSource source)
|
|
{
|
|
return (assign_msglvl(&log_min_error_statement, newval, doit, source));
|
|
}
|
|
|
|
static const char *
|
|
assign_msglvl(int *var, const char *newval, bool doit, GucSource source)
|
|
{
|
|
if (pg_strcasecmp(newval, "debug") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = DEBUG2;
|
|
}
|
|
else if (pg_strcasecmp(newval, "debug5") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = DEBUG5;
|
|
}
|
|
else if (pg_strcasecmp(newval, "debug4") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = DEBUG4;
|
|
}
|
|
else if (pg_strcasecmp(newval, "debug3") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = DEBUG3;
|
|
}
|
|
else if (pg_strcasecmp(newval, "debug2") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = DEBUG2;
|
|
}
|
|
else if (pg_strcasecmp(newval, "debug1") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = DEBUG1;
|
|
}
|
|
else if (pg_strcasecmp(newval, "log") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = LOG;
|
|
}
|
|
/*
|
|
* Client_min_messages always prints 'info', but
|
|
* we allow it as a value anyway.
|
|
*/
|
|
else if (pg_strcasecmp(newval, "info") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = INFO;
|
|
}
|
|
else if (pg_strcasecmp(newval, "notice") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = NOTICE;
|
|
}
|
|
else if (pg_strcasecmp(newval, "warning") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = WARNING;
|
|
}
|
|
else if (pg_strcasecmp(newval, "error") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = ERROR;
|
|
}
|
|
/* We allow FATAL/PANIC for client-side messages too. */
|
|
else if (pg_strcasecmp(newval, "fatal") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = FATAL;
|
|
}
|
|
else if (pg_strcasecmp(newval, "panic") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = PANIC;
|
|
}
|
|
else
|
|
return NULL; /* fail */
|
|
return newval; /* OK */
|
|
}
|
|
|
|
static const char *
|
|
assign_log_error_verbosity(const char *newval, bool doit, GucSource source)
|
|
{
|
|
if (pg_strcasecmp(newval, "terse") == 0)
|
|
{
|
|
if (doit)
|
|
Log_error_verbosity = PGERROR_TERSE;
|
|
}
|
|
else if (pg_strcasecmp(newval, "default") == 0)
|
|
{
|
|
if (doit)
|
|
Log_error_verbosity = PGERROR_DEFAULT;
|
|
}
|
|
else if (pg_strcasecmp(newval, "verbose") == 0)
|
|
{
|
|
if (doit)
|
|
Log_error_verbosity = PGERROR_VERBOSE;
|
|
}
|
|
else
|
|
return NULL; /* fail */
|
|
return newval; /* OK */
|
|
}
|
|
|
|
static const char *
|
|
assign_log_statement(const char *newval, bool doit, GucSource source)
|
|
{
|
|
return (assign_log_stmtlvl((int *)&log_statement, newval, doit, source));
|
|
}
|
|
|
|
static const char *
|
|
assign_log_stmtlvl(int *var, const char *newval, bool doit, GucSource source)
|
|
{
|
|
if (pg_strcasecmp(newval, "none") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = LOGSTMT_NONE;
|
|
}
|
|
else if (pg_strcasecmp(newval, "mod") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = LOGSTMT_MOD;
|
|
}
|
|
else if (pg_strcasecmp(newval, "ddl") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = LOGSTMT_DDL;
|
|
}
|
|
else if (pg_strcasecmp(newval, "all") == 0)
|
|
{
|
|
if (doit)
|
|
(*var) = LOGSTMT_ALL;
|
|
}
|
|
else
|
|
return NULL; /* fail */
|
|
return newval; /* OK */
|
|
}
|
|
|
|
static bool
|
|
assign_phony_autocommit(bool newval, bool doit, GucSource source)
|
|
{
|
|
if (!newval)
|
|
{
|
|
if (doit && source >= PGC_S_INTERACTIVE)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
|
|
errmsg("SET AUTOCOMMIT TO OFF is no longer supported")));
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static const char *
|
|
assign_custom_variable_classes(const char *newval, bool doit, GucSource source)
|
|
{
|
|
/* Check syntax. newval must be a comma separated list of identifiers.
|
|
* Whitespace is allowed but skipped.
|
|
*/
|
|
bool hasSpaceAfterToken = false;
|
|
const char *cp = newval;
|
|
int symLen = 0;
|
|
int c;
|
|
StringInfoData buf;
|
|
|
|
initStringInfo(&buf);
|
|
while((c = *cp++) != 0)
|
|
{
|
|
if(isspace(c))
|
|
{
|
|
if(symLen > 0)
|
|
hasSpaceAfterToken = true;
|
|
continue;
|
|
}
|
|
|
|
if(c == ',')
|
|
{
|
|
hasSpaceAfterToken = false;
|
|
if(symLen > 0)
|
|
{
|
|
symLen = 0;
|
|
appendStringInfoChar(&buf, ',');
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if(hasSpaceAfterToken || !isalnum(c))
|
|
{
|
|
/* Syntax error due to token following space after
|
|
* token or non alpha numeric character
|
|
*/
|
|
pfree(buf.data);
|
|
ereport(WARNING,
|
|
(errcode(ERRCODE_SYNTAX_ERROR),
|
|
errmsg("illegal syntax for custom_variable_classes \"%s\"", newval)));
|
|
return NULL;
|
|
}
|
|
symLen++;
|
|
appendStringInfoChar(&buf, (char)c);
|
|
}
|
|
|
|
if(symLen == 0 && buf.len > 0)
|
|
/*
|
|
* Remove stray ',' at end
|
|
*/
|
|
buf.data[--buf.len] = 0;
|
|
|
|
if(buf.len == 0)
|
|
newval = NULL;
|
|
else if(doit)
|
|
newval = strdup(buf.data);
|
|
|
|
pfree(buf.data);
|
|
return newval;
|
|
}
|
|
|
|
static bool
|
|
assign_stage_log_stats(bool newval, bool doit, GucSource source)
|
|
{
|
|
if (newval)
|
|
{
|
|
if (log_statement_stats)
|
|
{
|
|
if (doit)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("cannot enable parameter when \"log_statement_stats\" is true.")));
|
|
else
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
static bool
|
|
assign_log_stats(bool newval, bool doit, GucSource source)
|
|
{
|
|
if (newval)
|
|
{
|
|
if (log_parser_stats || log_planner_stats || log_executor_stats)
|
|
{
|
|
if (doit)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("cannot enable \"log_statement_stats\" when \"log_parser_stats\",\n"
|
|
"\"log_planner_stats\", or \"log_executor_stats\" is true.")));
|
|
else
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
assign_transaction_read_only(bool newval, bool doit, GucSource source)
|
|
{
|
|
/* Can't go to r/w mode inside a r/o transaction */
|
|
if (newval == false && XactReadOnly && IsSubTransaction())
|
|
{
|
|
if (source >= PGC_S_INTERACTIVE)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("cannot set transaction read-write mode inside a read-only transaction")));
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static const char *
|
|
assign_canonical_path(const char *newval, bool doit, GucSource source)
|
|
{
|
|
|
|
if (doit)
|
|
{
|
|
/* We have to create a new pointer to force the change */
|
|
char *canon_val = guc_strdup(ERROR, newval);
|
|
canonicalize_path(canon_val);
|
|
return canon_val;
|
|
}
|
|
else
|
|
return newval;
|
|
}
|
|
|
|
#include "guc-file.c"
|