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issued by autovacuum. Add accessor functions to them, and use those in the pg_stat_*_tables system views. Catalog version bumped due to changes in the pgstat views and the pgstat file. Patch from Larry Rosenman, minor improvements by me.
662 lines
13 KiB
C
662 lines
13 KiB
C
/*-------------------------------------------------------------------------
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*
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* pgstatfuncs.c
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* Functions for accessing the statistics collector data
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*
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* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/adt/pgstatfuncs.c,v 1.29 2006/05/19 19:08:26 alvherre 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 "access/xact.h"
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#include "fmgr.h"
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#include "funcapi.h"
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#include "miscadmin.h"
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#include "nodes/execnodes.h"
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#include "pgstat.h"
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#include "utils/hsearch.h"
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#include "utils/inet.h"
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#include "utils/builtins.h"
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#include "libpq/ip.h"
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/* bogus ... these externs should be in a header file */
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extern Datum pg_stat_get_numscans(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_tuples_returned(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_tuples_fetched(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_tuples_inserted(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_tuples_updated(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_tuples_deleted(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_blocks_hit(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_last_vacuum_time(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_last_autovacuum_time(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_last_analyze_time(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_last_autoanalyze_time(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_idset(PG_FUNCTION_ARGS);
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extern Datum pg_backend_pid(PG_FUNCTION_ARGS);
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extern Datum pg_stat_reset(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_pid(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_dbid(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_userid(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_activity(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_activity_start(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_start(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_client_addr(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_backend_client_port(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_db_numbackends(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_db_xact_commit(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_db_xact_rollback(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_db_blocks_fetched(PG_FUNCTION_ARGS);
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extern Datum pg_stat_get_db_blocks_hit(PG_FUNCTION_ARGS);
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Datum
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pg_stat_get_numscans(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->numscans);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_returned(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->tuples_returned);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_fetched(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->tuples_fetched);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_inserted(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->tuples_inserted);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_updated(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->tuples_updated);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_tuples_deleted(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->tuples_deleted);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->blocks_fetched);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_blocks_hit(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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int64 result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = (int64) (tabentry->blocks_hit);
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PG_RETURN_INT64(result);
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}
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Datum
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pg_stat_get_last_vacuum_time(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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TimestampTz result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = tabentry->vacuum_timestamp;
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if (result == 0)
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PG_RETURN_NULL();
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else
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PG_RETURN_TIMESTAMPTZ(result);
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}
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Datum
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pg_stat_get_last_autovacuum_time(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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TimestampTz result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = tabentry->autovac_vacuum_timestamp;
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if (result == 0)
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PG_RETURN_NULL();
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else
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PG_RETURN_TIMESTAMPTZ(result);
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}
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Datum
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pg_stat_get_last_analyze_time(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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TimestampTz result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = tabentry->analyze_timestamp;
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if (result == 0)
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PG_RETURN_NULL();
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else
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PG_RETURN_TIMESTAMPTZ(result);
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}
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Datum
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pg_stat_get_last_autoanalyze_time(PG_FUNCTION_ARGS)
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{
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PgStat_StatTabEntry *tabentry;
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Oid relid;
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TimestampTz result;
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relid = PG_GETARG_OID(0);
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if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL)
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result = 0;
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else
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result = tabentry->autovac_analyze_timestamp;
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if (result == 0)
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PG_RETURN_NULL();
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else
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PG_RETURN_TIMESTAMPTZ(result);
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}
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Datum
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pg_stat_get_backend_idset(PG_FUNCTION_ARGS)
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{
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FuncCallContext *funcctx;
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int *fctx;
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int32 result;
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/* stuff done only on the first call of the function */
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if (SRF_IS_FIRSTCALL())
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{
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/* create a function context for cross-call persistence */
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funcctx = SRF_FIRSTCALL_INIT();
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fctx = MemoryContextAlloc(funcctx->multi_call_memory_ctx,
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2 * sizeof(int));
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funcctx->user_fctx = fctx;
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fctx[0] = 0;
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fctx[1] = pgstat_fetch_stat_numbackends();
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}
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/* stuff done on every call of the function */
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funcctx = SRF_PERCALL_SETUP();
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fctx = funcctx->user_fctx;
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fctx[0] += 1;
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result = fctx[0];
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if (result <= fctx[1])
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{
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/* do when there is more left to send */
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SRF_RETURN_NEXT(funcctx, Int32GetDatum(result));
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}
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else
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{
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/* do when there is no more left */
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SRF_RETURN_DONE(funcctx);
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}
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}
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Datum
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pg_backend_pid(PG_FUNCTION_ARGS)
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{
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PG_RETURN_INT32(MyProcPid);
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}
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/*
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* Built-in function for resetting the counters
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*/
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Datum
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pg_stat_reset(PG_FUNCTION_ARGS)
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{
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pgstat_reset_counters();
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PG_RETURN_BOOL(true);
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}
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Datum
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pg_stat_get_backend_pid(PG_FUNCTION_ARGS)
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{
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PgStat_StatBeEntry *beentry;
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int32 beid;
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beid = PG_GETARG_INT32(0);
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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PG_RETURN_NULL();
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PG_RETURN_INT32(beentry->procpid);
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}
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Datum
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pg_stat_get_backend_dbid(PG_FUNCTION_ARGS)
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{
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PgStat_StatBeEntry *beentry;
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int32 beid;
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beid = PG_GETARG_INT32(0);
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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PG_RETURN_NULL();
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/* Not initialized yet? */
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if (!OidIsValid(beentry->databaseid))
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PG_RETURN_NULL();
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PG_RETURN_OID(beentry->databaseid);
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}
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Datum
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pg_stat_get_backend_userid(PG_FUNCTION_ARGS)
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{
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PgStat_StatBeEntry *beentry;
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int32 beid;
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beid = PG_GETARG_INT32(0);
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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PG_RETURN_NULL();
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/* Not initialized yet? */
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if (!OidIsValid(beentry->userid))
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PG_RETURN_NULL();
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PG_RETURN_OID(beentry->userid);
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}
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Datum
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pg_stat_get_backend_activity(PG_FUNCTION_ARGS)
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{
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PgStat_StatBeEntry *beentry;
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int32 beid;
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int len;
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char *activity;
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text *result;
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beid = PG_GETARG_INT32(0);
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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activity = "<backend information not available>";
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else if (!superuser() && beentry->userid != GetUserId())
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activity = "<insufficient privilege>";
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else if (*(beentry->activity) == '\0')
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activity = "<command string not enabled>";
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else
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activity = beentry->activity;
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len = strlen(activity);
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result = palloc(VARHDRSZ + len);
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VARATT_SIZEP(result) = VARHDRSZ + len;
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memcpy(VARDATA(result), activity, len);
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PG_RETURN_TEXT_P(result);
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}
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Datum
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pg_stat_get_backend_activity_start(PG_FUNCTION_ARGS)
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{
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int32 beid = PG_GETARG_INT32(0);
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TimestampTz result;
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PgStat_StatBeEntry *beentry;
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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PG_RETURN_NULL();
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if (!superuser() && beentry->userid != GetUserId())
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PG_RETURN_NULL();
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result = beentry->activity_start_timestamp;
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/*
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* No time recorded for start of current query -- this is the case if the
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* user hasn't enabled query-level stats collection.
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*/
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if (result == 0)
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PG_RETURN_NULL();
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PG_RETURN_TIMESTAMPTZ(result);
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}
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Datum
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pg_stat_get_backend_start(PG_FUNCTION_ARGS)
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{
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int32 beid = PG_GETARG_INT32(0);
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TimestampTz result;
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PgStat_StatBeEntry *beentry;
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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PG_RETURN_NULL();
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if (!superuser() && beentry->userid != GetUserId())
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PG_RETURN_NULL();
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result = beentry->start_timestamp;
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if (result == 0) /* probably can't happen? */
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PG_RETURN_NULL();
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PG_RETURN_TIMESTAMPTZ(result);
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}
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Datum
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pg_stat_get_backend_client_addr(PG_FUNCTION_ARGS)
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{
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PgStat_StatBeEntry *beentry;
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SockAddr zero_clientaddr;
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int32 beid;
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char remote_host[NI_MAXHOST];
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int ret;
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beid = PG_GETARG_INT32(0);
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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PG_RETURN_NULL();
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/* Not initialized yet? */
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if (!OidIsValid(beentry->userid))
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PG_RETURN_NULL();
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if (!superuser() && beentry->userid != GetUserId())
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PG_RETURN_NULL();
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/* A zeroed client addr means we don't know */
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memset(&zero_clientaddr, 0, sizeof(zero_clientaddr));
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if (memcmp(&(beentry->clientaddr), &zero_clientaddr,
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sizeof(zero_clientaddr) == 0))
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PG_RETURN_NULL();
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switch (beentry->clientaddr.addr.ss_family)
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{
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case AF_INET:
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#ifdef HAVE_IPV6
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case AF_INET6:
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#endif
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break;
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default:
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PG_RETURN_NULL();
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}
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remote_host[0] = '\0';
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ret = pg_getnameinfo_all(&beentry->clientaddr.addr, beentry->clientaddr.salen,
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remote_host, sizeof(remote_host),
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NULL, 0,
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NI_NUMERICHOST | NI_NUMERICSERV);
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if (ret)
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PG_RETURN_NULL();
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PG_RETURN_INET_P(DirectFunctionCall1(inet_in,
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CStringGetDatum(remote_host)));
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}
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Datum
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pg_stat_get_backend_client_port(PG_FUNCTION_ARGS)
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{
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PgStat_StatBeEntry *beentry;
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SockAddr zero_clientaddr;
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int32 beid;
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char remote_port[NI_MAXSERV];
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int ret;
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beid = PG_GETARG_INT32(0);
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if ((beentry = pgstat_fetch_stat_beentry(beid)) == NULL)
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PG_RETURN_NULL();
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/* Not initialized yet? */
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if (!OidIsValid(beentry->userid))
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PG_RETURN_NULL();
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if (!superuser() && beentry->userid != GetUserId())
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PG_RETURN_NULL();
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/* A zeroed client addr means we don't know */
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memset(&zero_clientaddr, 0, sizeof(zero_clientaddr));
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if (memcmp(&(beentry->clientaddr), &zero_clientaddr,
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sizeof(zero_clientaddr) == 0))
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PG_RETURN_NULL();
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switch (beentry->clientaddr.addr.ss_family)
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{
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case AF_INET:
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#ifdef HAVE_IPV6
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case AF_INET6:
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#endif
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break;
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case AF_UNIX:
|
|
PG_RETURN_INT32(-1);
|
|
default:
|
|
PG_RETURN_NULL();
|
|
}
|
|
|
|
remote_port[0] = '\0';
|
|
ret = pg_getnameinfo_all(&beentry->clientaddr.addr,
|
|
beentry->clientaddr.salen,
|
|
NULL, 0,
|
|
remote_port, sizeof(remote_port),
|
|
NI_NUMERICHOST | NI_NUMERICSERV);
|
|
if (ret)
|
|
PG_RETURN_NULL();
|
|
|
|
PG_RETURN_DATUM(DirectFunctionCall1(int4in, CStringGetDatum(remote_port)));
|
|
}
|
|
|
|
|
|
Datum
|
|
pg_stat_get_db_numbackends(PG_FUNCTION_ARGS)
|
|
{
|
|
PgStat_StatDBEntry *dbentry;
|
|
Oid dbid;
|
|
int32 result;
|
|
|
|
dbid = PG_GETARG_OID(0);
|
|
|
|
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
|
|
result = 0;
|
|
else
|
|
result = (int32) (dbentry->n_backends);
|
|
|
|
PG_RETURN_INT32(result);
|
|
}
|
|
|
|
|
|
Datum
|
|
pg_stat_get_db_xact_commit(PG_FUNCTION_ARGS)
|
|
{
|
|
PgStat_StatDBEntry *dbentry;
|
|
Oid dbid;
|
|
int64 result;
|
|
|
|
dbid = PG_GETARG_OID(0);
|
|
|
|
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
|
|
result = 0;
|
|
else
|
|
result = (int64) (dbentry->n_xact_commit);
|
|
|
|
PG_RETURN_INT64(result);
|
|
}
|
|
|
|
|
|
Datum
|
|
pg_stat_get_db_xact_rollback(PG_FUNCTION_ARGS)
|
|
{
|
|
PgStat_StatDBEntry *dbentry;
|
|
Oid dbid;
|
|
int64 result;
|
|
|
|
dbid = PG_GETARG_OID(0);
|
|
|
|
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
|
|
result = 0;
|
|
else
|
|
result = (int64) (dbentry->n_xact_rollback);
|
|
|
|
PG_RETURN_INT64(result);
|
|
}
|
|
|
|
|
|
Datum
|
|
pg_stat_get_db_blocks_fetched(PG_FUNCTION_ARGS)
|
|
{
|
|
PgStat_StatDBEntry *dbentry;
|
|
Oid dbid;
|
|
int64 result;
|
|
|
|
dbid = PG_GETARG_OID(0);
|
|
|
|
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
|
|
result = 0;
|
|
else
|
|
result = (int64) (dbentry->n_blocks_fetched);
|
|
|
|
PG_RETURN_INT64(result);
|
|
}
|
|
|
|
|
|
Datum
|
|
pg_stat_get_db_blocks_hit(PG_FUNCTION_ARGS)
|
|
{
|
|
PgStat_StatDBEntry *dbentry;
|
|
Oid dbid;
|
|
int64 result;
|
|
|
|
dbid = PG_GETARG_OID(0);
|
|
|
|
if ((dbentry = pgstat_fetch_stat_dbentry(dbid)) == NULL)
|
|
result = 0;
|
|
else
|
|
result = (int64) (dbentry->n_blocks_hit);
|
|
|
|
PG_RETURN_INT64(result);
|
|
}
|