mirror of
https://git.postgresql.org/git/postgresql.git
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c6b3c939b7
While the SQL standard is pretty vague on the overall topic of operator precedence (because it never presents a unified BNF for all expressions), it does seem reasonable to conclude from the spec for <boolean value expression> that OR has the lowest precedence, then AND, then NOT, then IS tests, then the six standard comparison operators, then everything else (since any non-boolean operator in a WHERE clause would need to be an argument of one of these). We were only sort of on board with that: most notably, while "<" ">" and "=" had properly low precedence, "<=" ">=" and "<>" were treated as generic operators and so had significantly higher precedence. And "IS" tests were even higher precedence than those, which is very clearly wrong per spec. Another problem was that "foo NOT SOMETHING bar" constructs, such as "x NOT LIKE y", were treated inconsistently because of a bison implementation artifact: they had the documented precedence with respect to operators to their right, but behaved like NOT (i.e., very low priority) with respect to operators to their left. Fixing the precedence issues is just a small matter of rearranging the precedence declarations in gram.y, except for the NOT problem, which requires adding an additional lookahead case in base_yylex() so that we can attach a different token precedence to NOT LIKE and allied two-word operators. The bulk of this patch is not the bug fix per se, but adding logic to parse_expr.c to allow giving warnings if an expression has changed meaning because of these precedence changes. These warnings are off by default and are enabled by the new GUC operator_precedence_warning. It's believed that very few applications will be affected by these changes, but it was agreed that a warning mechanism is essential to help debug any that are.
626 lines
21 KiB
Plaintext
626 lines
21 KiB
Plaintext
# -----------------------------
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# PostgreSQL configuration file
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# -----------------------------
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#
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# This file consists of lines of the form:
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#
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# name = value
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#
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# (The "=" is optional.) Whitespace may be used. Comments are introduced with
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# "#" anywhere on a line. The complete list of parameter names and allowed
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# values can be found in the PostgreSQL documentation.
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#
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# The commented-out settings shown in this file represent the default values.
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# Re-commenting a setting is NOT sufficient to revert it to the default value;
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# you need to reload the server.
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#
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# This file is read on server startup and when the server receives a SIGHUP
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# signal. If you edit the file on a running system, you have to SIGHUP the
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# server for the changes to take effect, or use "pg_ctl reload". Some
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# parameters, which are marked below, require a server shutdown and restart to
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# take effect.
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#
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# Any parameter can also be given as a command-line option to the server, e.g.,
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# "postgres -c log_connections=on". Some parameters can be changed at run time
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# with the "SET" SQL command.
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#
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# Memory units: kB = kilobytes Time units: ms = milliseconds
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# MB = megabytes s = seconds
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# GB = gigabytes min = minutes
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# TB = terabytes h = hours
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# d = days
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#------------------------------------------------------------------------------
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# FILE LOCATIONS
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#------------------------------------------------------------------------------
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# The default values of these variables are driven from the -D command-line
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# option or PGDATA environment variable, represented here as ConfigDir.
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#data_directory = 'ConfigDir' # use data in another directory
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# (change requires restart)
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#hba_file = 'ConfigDir/pg_hba.conf' # host-based authentication file
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# (change requires restart)
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#ident_file = 'ConfigDir/pg_ident.conf' # ident configuration file
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# (change requires restart)
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# If external_pid_file is not explicitly set, no extra PID file is written.
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#external_pid_file = '' # write an extra PID file
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# (change requires restart)
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#------------------------------------------------------------------------------
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# CONNECTIONS AND AUTHENTICATION
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#------------------------------------------------------------------------------
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# - Connection Settings -
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#listen_addresses = 'localhost' # what IP address(es) to listen on;
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# comma-separated list of addresses;
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# defaults to 'localhost'; use '*' for all
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# (change requires restart)
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#port = 5432 # (change requires restart)
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#max_connections = 100 # (change requires restart)
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# Note: Increasing max_connections costs ~400 bytes of shared memory per
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# connection slot, plus lock space (see max_locks_per_transaction).
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#superuser_reserved_connections = 3 # (change requires restart)
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#unix_socket_directories = '/tmp' # comma-separated list of directories
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# (change requires restart)
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#unix_socket_group = '' # (change requires restart)
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#unix_socket_permissions = 0777 # begin with 0 to use octal notation
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# (change requires restart)
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#bonjour = off # advertise server via Bonjour
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# (change requires restart)
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#bonjour_name = '' # defaults to the computer name
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# (change requires restart)
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# - Security and Authentication -
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#authentication_timeout = 1min # 1s-600s
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#ssl = off # (change requires restart)
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#ssl_ciphers = 'HIGH:MEDIUM:+3DES:!aNULL' # allowed SSL ciphers
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# (change requires restart)
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#ssl_prefer_server_ciphers = on # (change requires restart)
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#ssl_ecdh_curve = 'prime256v1' # (change requires restart)
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#ssl_renegotiation_limit = 512MB # amount of data between renegotiations
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#ssl_cert_file = 'server.crt' # (change requires restart)
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#ssl_key_file = 'server.key' # (change requires restart)
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#ssl_ca_file = '' # (change requires restart)
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#ssl_crl_file = '' # (change requires restart)
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#password_encryption = on
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#db_user_namespace = off
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#row_security = on
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# GSSAPI using Kerberos
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#krb_server_keyfile = ''
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#krb_caseins_users = off
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# - TCP Keepalives -
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# see "man 7 tcp" for details
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#tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in seconds;
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# 0 selects the system default
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#tcp_keepalives_interval = 0 # TCP_KEEPINTVL, in seconds;
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# 0 selects the system default
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#tcp_keepalives_count = 0 # TCP_KEEPCNT;
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# 0 selects the system default
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#------------------------------------------------------------------------------
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# RESOURCE USAGE (except WAL)
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#------------------------------------------------------------------------------
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# - Memory -
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#shared_buffers = 32MB # min 128kB
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# (change requires restart)
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#huge_pages = try # on, off, or try
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# (change requires restart)
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#temp_buffers = 8MB # min 800kB
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#max_prepared_transactions = 0 # zero disables the feature
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# (change requires restart)
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# Note: Increasing max_prepared_transactions costs ~600 bytes of shared memory
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# per transaction slot, plus lock space (see max_locks_per_transaction).
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# It is not advisable to set max_prepared_transactions nonzero unless you
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# actively intend to use prepared transactions.
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#work_mem = 4MB # min 64kB
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#maintenance_work_mem = 64MB # min 1MB
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#autovacuum_work_mem = -1 # min 1MB, or -1 to use maintenance_work_mem
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#max_stack_depth = 2MB # min 100kB
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#dynamic_shared_memory_type = posix # the default is the first option
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# supported by the operating system:
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# posix
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# sysv
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# windows
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# mmap
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# use none to disable dynamic shared memory
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# - Disk -
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#temp_file_limit = -1 # limits per-session temp file space
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# in kB, or -1 for no limit
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# - Kernel Resource Usage -
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#max_files_per_process = 1000 # min 25
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# (change requires restart)
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#shared_preload_libraries = '' # (change requires restart)
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# - Cost-Based Vacuum Delay -
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#vacuum_cost_delay = 0 # 0-100 milliseconds
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#vacuum_cost_page_hit = 1 # 0-10000 credits
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#vacuum_cost_page_miss = 10 # 0-10000 credits
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#vacuum_cost_page_dirty = 20 # 0-10000 credits
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#vacuum_cost_limit = 200 # 1-10000 credits
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# - Background Writer -
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#bgwriter_delay = 200ms # 10-10000ms between rounds
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#bgwriter_lru_maxpages = 100 # 0-1000 max buffers written/round
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#bgwriter_lru_multiplier = 2.0 # 0-10.0 multipler on buffers scanned/round
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# - Asynchronous Behavior -
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#effective_io_concurrency = 1 # 1-1000; 0 disables prefetching
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#max_worker_processes = 8
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#------------------------------------------------------------------------------
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# WRITE AHEAD LOG
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#------------------------------------------------------------------------------
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# - Settings -
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#wal_level = minimal # minimal, archive, hot_standby, or logical
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# (change requires restart)
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#fsync = on # turns forced synchronization on or off
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#synchronous_commit = on # synchronization level;
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# off, local, remote_write, or on
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#wal_sync_method = fsync # the default is the first option
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# supported by the operating system:
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# open_datasync
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# fdatasync (default on Linux)
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# fsync
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# fsync_writethrough
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# open_sync
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#full_page_writes = on # recover from partial page writes
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#wal_compression = off # enable compression of full-page writes
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#wal_log_hints = off # also do full page writes of non-critical updates
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# (change requires restart)
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#wal_buffers = -1 # min 32kB, -1 sets based on shared_buffers
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# (change requires restart)
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#wal_writer_delay = 200ms # 1-10000 milliseconds
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#commit_delay = 0 # range 0-100000, in microseconds
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#commit_siblings = 5 # range 1-1000
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# - Checkpoints -
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#checkpoint_timeout = 5min # range 30s-1h
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#max_wal_size = 128MB # in logfile segments
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#min_wal_size = 80MB
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#checkpoint_completion_target = 0.5 # checkpoint target duration, 0.0 - 1.0
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#checkpoint_warning = 30s # 0 disables
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# - Archiving -
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#archive_mode = off # allows archiving to be done
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# (change requires restart)
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#archive_command = '' # command to use to archive a logfile segment
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# placeholders: %p = path of file to archive
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# %f = file name only
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# e.g. 'test ! -f /mnt/server/archivedir/%f && cp %p /mnt/server/archivedir/%f'
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#archive_timeout = 0 # force a logfile segment switch after this
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# number of seconds; 0 disables
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#------------------------------------------------------------------------------
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# REPLICATION
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#------------------------------------------------------------------------------
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# - Sending Server(s) -
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# Set these on the master and on any standby that will send replication data.
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#max_wal_senders = 0 # max number of walsender processes
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# (change requires restart)
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#wal_keep_segments = 0 # in logfile segments, 16MB each; 0 disables
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#wal_sender_timeout = 60s # in milliseconds; 0 disables
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#max_replication_slots = 0 # max number of replication slots
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# (change requires restart)
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#track_commit_timestamp = off # collect timestamp of transaction commit
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# (change requires restart)
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# - Master Server -
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# These settings are ignored on a standby server.
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#synchronous_standby_names = '' # standby servers that provide sync rep
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# comma-separated list of application_name
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# from standby(s); '*' = all
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#vacuum_defer_cleanup_age = 0 # number of xacts by which cleanup is delayed
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# - Standby Servers -
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# These settings are ignored on a master server.
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#hot_standby = off # "on" allows queries during recovery
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# (change requires restart)
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#max_standby_archive_delay = 30s # max delay before canceling queries
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# when reading WAL from archive;
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# -1 allows indefinite delay
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#max_standby_streaming_delay = 30s # max delay before canceling queries
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# when reading streaming WAL;
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# -1 allows indefinite delay
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#wal_receiver_status_interval = 10s # send replies at least this often
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# 0 disables
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#hot_standby_feedback = off # send info from standby to prevent
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# query conflicts
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#wal_receiver_timeout = 60s # time that receiver waits for
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# communication from master
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# in milliseconds; 0 disables
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#wal_retrieve_retry_interval = 5s # time to wait before retrying to
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# retrieve WAL after a failed attempt
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#------------------------------------------------------------------------------
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# QUERY TUNING
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#------------------------------------------------------------------------------
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# - Planner Method Configuration -
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#enable_bitmapscan = on
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#enable_hashagg = on
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#enable_hashjoin = on
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#enable_indexscan = on
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#enable_indexonlyscan = on
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#enable_material = on
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#enable_mergejoin = on
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#enable_nestloop = on
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#enable_seqscan = on
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#enable_sort = on
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#enable_tidscan = on
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# - Planner Cost Constants -
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#seq_page_cost = 1.0 # measured on an arbitrary scale
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#random_page_cost = 4.0 # same scale as above
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#cpu_tuple_cost = 0.01 # same scale as above
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#cpu_index_tuple_cost = 0.005 # same scale as above
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#cpu_operator_cost = 0.0025 # same scale as above
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#effective_cache_size = 4GB
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# - Genetic Query Optimizer -
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#geqo = on
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#geqo_threshold = 12
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#geqo_effort = 5 # range 1-10
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#geqo_pool_size = 0 # selects default based on effort
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#geqo_generations = 0 # selects default based on effort
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#geqo_selection_bias = 2.0 # range 1.5-2.0
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#geqo_seed = 0.0 # range 0.0-1.0
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# - Other Planner Options -
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#default_statistics_target = 100 # range 1-10000
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#constraint_exclusion = partition # on, off, or partition
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#cursor_tuple_fraction = 0.1 # range 0.0-1.0
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#from_collapse_limit = 8
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#join_collapse_limit = 8 # 1 disables collapsing of explicit
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# JOIN clauses
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#------------------------------------------------------------------------------
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# ERROR REPORTING AND LOGGING
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#------------------------------------------------------------------------------
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# - Where to Log -
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#log_destination = 'stderr' # Valid values are combinations of
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# stderr, csvlog, syslog, and eventlog,
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# depending on platform. csvlog
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# requires logging_collector to be on.
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# This is used when logging to stderr:
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#logging_collector = off # Enable capturing of stderr and csvlog
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# into log files. Required to be on for
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# csvlogs.
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# (change requires restart)
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# These are only used if logging_collector is on:
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#log_directory = 'pg_log' # directory where log files are written,
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# can be absolute or relative to PGDATA
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#log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # log file name pattern,
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# can include strftime() escapes
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#log_file_mode = 0600 # creation mode for log files,
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# begin with 0 to use octal notation
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#log_truncate_on_rotation = off # If on, an existing log file with the
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# same name as the new log file will be
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# truncated rather than appended to.
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# But such truncation only occurs on
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# time-driven rotation, not on restarts
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# or size-driven rotation. Default is
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# off, meaning append to existing files
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# in all cases.
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#log_rotation_age = 1d # Automatic rotation of logfiles will
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# happen after that time. 0 disables.
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#log_rotation_size = 10MB # Automatic rotation of logfiles will
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# happen after that much log output.
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# 0 disables.
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# These are relevant when logging to syslog:
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#syslog_facility = 'LOCAL0'
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#syslog_ident = 'postgres'
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# This is only relevant when logging to eventlog (win32):
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#event_source = 'PostgreSQL'
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# - When to Log -
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#client_min_messages = notice # values in order of decreasing detail:
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# debug5
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# debug4
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# debug3
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# debug2
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# debug1
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# log
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# notice
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# warning
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# error
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#log_min_messages = warning # values in order of decreasing detail:
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# debug5
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# debug4
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# debug3
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# debug2
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# debug1
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# info
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# notice
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# warning
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# error
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# log
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# fatal
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# panic
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#log_min_error_statement = error # values in order of decreasing detail:
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# debug5
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# debug4
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# debug3
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# debug2
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# debug1
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# info
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# notice
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# warning
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# error
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# log
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# fatal
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# panic (effectively off)
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#log_min_duration_statement = -1 # -1 is disabled, 0 logs all statements
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# and their durations, > 0 logs only
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# statements running at least this number
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# of milliseconds
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# - What to Log -
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#debug_print_parse = off
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#debug_print_rewritten = off
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#debug_print_plan = off
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#debug_pretty_print = on
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#log_checkpoints = off
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#log_connections = off
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#log_disconnections = off
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#log_duration = off
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#log_error_verbosity = default # terse, default, or verbose messages
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#log_hostname = off
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#log_line_prefix = '' # special values:
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# %a = application name
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# %u = user name
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# %d = database name
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# %r = remote host and port
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# %h = remote host
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# %p = process ID
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# %t = timestamp without milliseconds
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# %m = timestamp with milliseconds
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# %i = command tag
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# %e = SQL state
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# %c = session ID
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# %l = session line number
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# %s = session start timestamp
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# %v = virtual transaction ID
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# %x = transaction ID (0 if none)
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# %q = stop here in non-session
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# processes
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# %% = '%'
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# e.g. '<%u%%%d> '
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#log_lock_waits = off # log lock waits >= deadlock_timeout
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#log_statement = 'none' # none, ddl, mod, all
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#log_replication_commands = off
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#log_temp_files = -1 # log temporary files equal or larger
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# than the specified size in kilobytes;
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# -1 disables, 0 logs all temp files
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#log_timezone = 'GMT'
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#cluster_name = '' # added to process titles if nonempty
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# (change requires restart)
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#------------------------------------------------------------------------------
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# RUNTIME STATISTICS
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#------------------------------------------------------------------------------
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# - Query/Index Statistics Collector -
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#track_activities = on
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#track_counts = on
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#track_io_timing = off
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#track_functions = none # none, pl, all
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#track_activity_query_size = 1024 # (change requires restart)
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#update_process_title = on
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#stats_temp_directory = 'pg_stat_tmp'
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# - Statistics Monitoring -
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#log_parser_stats = off
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#log_planner_stats = off
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#log_executor_stats = off
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#log_statement_stats = off
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#------------------------------------------------------------------------------
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# AUTOVACUUM PARAMETERS
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#------------------------------------------------------------------------------
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#autovacuum = on # Enable autovacuum subprocess? 'on'
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# requires track_counts to also be on.
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#log_autovacuum_min_duration = -1 # -1 disables, 0 logs all actions and
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# their durations, > 0 logs only
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# actions running at least this number
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# of milliseconds.
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#autovacuum_max_workers = 3 # max number of autovacuum subprocesses
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# (change requires restart)
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#autovacuum_naptime = 1min # time between autovacuum runs
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#autovacuum_vacuum_threshold = 50 # min number of row updates before
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# vacuum
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#autovacuum_analyze_threshold = 50 # min number of row updates before
|
|
# analyze
|
|
#autovacuum_vacuum_scale_factor = 0.2 # fraction of table size before vacuum
|
|
#autovacuum_analyze_scale_factor = 0.1 # fraction of table size before analyze
|
|
#autovacuum_freeze_max_age = 200000000 # maximum XID age before forced vacuum
|
|
# (change requires restart)
|
|
#autovacuum_multixact_freeze_max_age = 400000000 # maximum multixact age
|
|
# before forced vacuum
|
|
# (change requires restart)
|
|
#autovacuum_vacuum_cost_delay = 20ms # default vacuum cost delay for
|
|
# autovacuum, in milliseconds;
|
|
# -1 means use vacuum_cost_delay
|
|
#autovacuum_vacuum_cost_limit = -1 # default vacuum cost limit for
|
|
# autovacuum, -1 means use
|
|
# vacuum_cost_limit
|
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
# CLIENT CONNECTION DEFAULTS
|
|
#------------------------------------------------------------------------------
|
|
|
|
# - Statement Behavior -
|
|
|
|
#search_path = '"$user", public' # schema names
|
|
#default_tablespace = '' # a tablespace name, '' uses the default
|
|
#temp_tablespaces = '' # a list of tablespace names, '' uses
|
|
# only default tablespace
|
|
#check_function_bodies = on
|
|
#default_transaction_isolation = 'read committed'
|
|
#default_transaction_read_only = off
|
|
#default_transaction_deferrable = off
|
|
#session_replication_role = 'origin'
|
|
#statement_timeout = 0 # in milliseconds, 0 is disabled
|
|
#lock_timeout = 0 # in milliseconds, 0 is disabled
|
|
#vacuum_freeze_min_age = 50000000
|
|
#vacuum_freeze_table_age = 150000000
|
|
#vacuum_multixact_freeze_min_age = 5000000
|
|
#vacuum_multixact_freeze_table_age = 150000000
|
|
#bytea_output = 'hex' # hex, escape
|
|
#xmlbinary = 'base64'
|
|
#xmloption = 'content'
|
|
#gin_pending_list_limit = 4MB
|
|
|
|
# - Locale and Formatting -
|
|
|
|
#datestyle = 'iso, mdy'
|
|
#intervalstyle = 'postgres'
|
|
#timezone = 'GMT'
|
|
#timezone_abbreviations = 'Default' # Select the set of available time zone
|
|
# abbreviations. Currently, there are
|
|
# Default
|
|
# Australia (historical usage)
|
|
# India
|
|
# You can create your own file in
|
|
# share/timezonesets/.
|
|
#extra_float_digits = 0 # min -15, max 3
|
|
#client_encoding = sql_ascii # actually, defaults to database
|
|
# encoding
|
|
|
|
# These settings are initialized by initdb, but they can be changed.
|
|
#lc_messages = 'C' # locale for system error message
|
|
# strings
|
|
#lc_monetary = 'C' # locale for monetary formatting
|
|
#lc_numeric = 'C' # locale for number formatting
|
|
#lc_time = 'C' # locale for time formatting
|
|
|
|
# default configuration for text search
|
|
#default_text_search_config = 'pg_catalog.simple'
|
|
|
|
# - Other Defaults -
|
|
|
|
#dynamic_library_path = '$libdir'
|
|
#local_preload_libraries = ''
|
|
#session_preload_libraries = ''
|
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
# LOCK MANAGEMENT
|
|
#------------------------------------------------------------------------------
|
|
|
|
#deadlock_timeout = 1s
|
|
#max_locks_per_transaction = 64 # min 10
|
|
# (change requires restart)
|
|
# Note: Each lock table slot uses ~270 bytes of shared memory, and there are
|
|
# max_locks_per_transaction * (max_connections + max_prepared_transactions)
|
|
# lock table slots.
|
|
#max_pred_locks_per_transaction = 64 # min 10
|
|
# (change requires restart)
|
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
# VERSION/PLATFORM COMPATIBILITY
|
|
#------------------------------------------------------------------------------
|
|
|
|
# - Previous PostgreSQL Versions -
|
|
|
|
#array_nulls = on
|
|
#backslash_quote = safe_encoding # on, off, or safe_encoding
|
|
#default_with_oids = off
|
|
#escape_string_warning = on
|
|
#lo_compat_privileges = off
|
|
#operator_precedence_warning = off
|
|
#quote_all_identifiers = off
|
|
#sql_inheritance = on
|
|
#standard_conforming_strings = on
|
|
#synchronize_seqscans = on
|
|
|
|
# - Other Platforms and Clients -
|
|
|
|
#transform_null_equals = off
|
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
# ERROR HANDLING
|
|
#------------------------------------------------------------------------------
|
|
|
|
#exit_on_error = off # terminate session on any error?
|
|
#restart_after_crash = on # reinitialize after backend crash?
|
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
# CONFIG FILE INCLUDES
|
|
#------------------------------------------------------------------------------
|
|
|
|
# These options allow settings to be loaded from files other than the
|
|
# default postgresql.conf.
|
|
|
|
#include_dir = 'conf.d' # include files ending in '.conf' from
|
|
# directory 'conf.d'
|
|
#include_if_exists = 'exists.conf' # include file only if it exists
|
|
#include = 'special.conf' # include file
|
|
|
|
|
|
#------------------------------------------------------------------------------
|
|
# CUSTOMIZED OPTIONS
|
|
#------------------------------------------------------------------------------
|
|
|
|
# Add settings for extensions here
|