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guc.c
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guc.c
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/*--------------------------------------------------------------------
* guc.c
*
* Support for grand unified configuration scheme, including SET
* command, configuration file, and command line options.
* See src/backend/utils/misc/README for more information.
*
*
* Copyright (c) 2000-2020, PostgreSQL Global Development Group
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* src/backend/utils/misc/guc.c
*
*--------------------------------------------------------------------
*/
#include "postgres.h"
#include <ctype.h>
#include <float.h>
#include <math.h>
#include <limits.h>
#ifndef WIN32
#include <sys/mman.h>
#endif
#include <sys/stat.h>
#ifdef HAVE_SYSLOG
#include <syslog.h>
#endif
#include <unistd.h>
#include "access/commit_ts.h"
#include "access/gin.h"
#include "access/rmgr.h"
#include "access/tableam.h"
#include "access/transam.h"
#include "access/twophase.h"
#include "access/xact.h"
#include "access/xlog_internal.h"
#include "catalog/namespace.h"
#include "catalog/pg_authid.h"
#include "catalog/storage.h"
#include "commands/async.h"
#include "commands/prepare.h"
#include "commands/trigger.h"
#include "commands/user.h"
#include "commands/vacuum.h"
#include "commands/variable.h"
#include "common/string.h"
#include "funcapi.h"
#include "jit/jit.h"
#include "libpq/auth.h"
#include "libpq/libpq.h"
#include "libpq/pqformat.h"
#include "miscadmin.h"
#include "optimizer/cost.h"
#include "optimizer/geqo.h"
#include "optimizer/optimizer.h"
#include "optimizer/paths.h"
#include "optimizer/planmain.h"
#include "parser/parse_expr.h"
#include "parser/parse_type.h"
#include "parser/parser.h"
#include "parser/scansup.h"
#include "pgstat.h"
#include "postmaster/autovacuum.h"
#include "postmaster/bgworker_internals.h"
#include "postmaster/bgwriter.h"
#include "postmaster/postmaster.h"
#include "postmaster/syslogger.h"
#include "postmaster/walwriter.h"
#include "replication/logicallauncher.h"
#include "replication/reorderbuffer.h"
#include "replication/slot.h"
#include "replication/syncrep.h"
#include "replication/walreceiver.h"
#include "replication/walsender.h"
#include "storage/bufmgr.h"
#include "storage/dsm_impl.h"
#include "storage/fd.h"
#include "storage/large_object.h"
#include "storage/pg_shmem.h"
#include "storage/predicate.h"
#include "storage/proc.h"
#include "storage/standby.h"
#include "tcop/tcopprot.h"
#include "tsearch/ts_cache.h"
#include "utils/acl.h"
#include "utils/builtins.h"
#include "utils/bytea.h"
#include "utils/float.h"
#include "utils/guc_tables.h"
#include "utils/memutils.h"
#include "utils/pg_locale.h"
#include "utils/pg_lsn.h"
#include "utils/plancache.h"
#include "utils/portal.h"
#include "utils/ps_status.h"
#include "utils/rls.h"
#include "utils/snapmgr.h"
#include "utils/tzparser.h"
#include "utils/varlena.h"
#include "utils/xml.h"
#ifndef PG_KRB_SRVTAB
#define PG_KRB_SRVTAB ""
#endif
#define CONFIG_FILENAME "postgresql.conf"
#define HBA_FILENAME "pg_hba.conf"
#define IDENT_FILENAME "pg_ident.conf"
#ifdef EXEC_BACKEND
#define CONFIG_EXEC_PARAMS "global/config_exec_params"
#define CONFIG_EXEC_PARAMS_NEW "global/config_exec_params.new"
#endif
/*
* Precision with which REAL type guc values are to be printed for GUC
* serialization.
*/
#define REALTYPE_PRECISION 17
/* XXX these should appear in other modules' header files */
extern bool Log_disconnections;
extern int CommitDelay;
extern int CommitSiblings;
extern char *default_tablespace;
extern char *temp_tablespaces;
extern bool ignore_checksum_failure;
extern bool ignore_invalid_pages;
extern bool synchronize_seqscans;
#ifdef TRACE_SYNCSCAN
extern bool trace_syncscan;
#endif
#ifdef DEBUG_BOUNDED_SORT
extern bool optimize_bounded_sort;
#endif
static int GUC_check_errcode_value;
/* global variables for check hook support */
char *GUC_check_errmsg_string;
char *GUC_check_errdetail_string;
char *GUC_check_errhint_string;
static void do_serialize(char **destptr, Size *maxbytes, const char *fmt,...) pg_attribute_printf(3, 4);
static void set_config_sourcefile(const char *name, char *sourcefile,
int sourceline);
static bool call_bool_check_hook(struct config_bool *conf, bool *newval,
void **extra, GucSource source, int elevel);
static bool call_int_check_hook(struct config_int *conf, int *newval,
void **extra, GucSource source, int elevel);
static bool call_real_check_hook(struct config_real *conf, double *newval,
void **extra, GucSource source, int elevel);
static bool call_string_check_hook(struct config_string *conf, char **newval,
void **extra, GucSource source, int elevel);
static bool call_enum_check_hook(struct config_enum *conf, int *newval,
void **extra, GucSource source, int elevel);
static bool check_log_destination(char **newval, void **extra, GucSource source);
static void assign_log_destination(const char *newval, void *extra);
static bool check_wal_consistency_checking(char **newval, void **extra,
GucSource source);
static void assign_wal_consistency_checking(const char *newval, void *extra);
#ifdef HAVE_SYSLOG
static int syslog_facility = LOG_LOCAL0;
#else
static int syslog_facility = 0;
#endif
static void assign_syslog_facility(int newval, void *extra);
static void assign_syslog_ident(const char *newval, void *extra);
static void assign_session_replication_role(int newval, void *extra);
static bool check_temp_buffers(int *newval, void **extra, GucSource source);
static bool check_bonjour(bool *newval, void **extra, GucSource source);
static bool check_ssl(bool *newval, void **extra, GucSource source);
static bool check_stage_log_stats(bool *newval, void **extra, GucSource source);
static bool check_log_stats(bool *newval, void **extra, GucSource source);
static bool check_canonical_path(char **newval, void **extra, GucSource source);
static bool check_timezone_abbreviations(char **newval, void **extra, GucSource source);
static void assign_timezone_abbreviations(const char *newval, void *extra);
static void pg_timezone_abbrev_initialize(void);
static const char *show_archive_command(void);
static void assign_tcp_keepalives_idle(int newval, void *extra);
static void assign_tcp_keepalives_interval(int newval, void *extra);
static void assign_tcp_keepalives_count(int newval, void *extra);
static void assign_tcp_user_timeout(int newval, void *extra);
static const char *show_tcp_keepalives_idle(void);
static const char *show_tcp_keepalives_interval(void);
static const char *show_tcp_keepalives_count(void);
static const char *show_tcp_user_timeout(void);
static bool check_maxconnections(int *newval, void **extra, GucSource source);
static bool check_max_worker_processes(int *newval, void **extra, GucSource source);
static bool check_autovacuum_max_workers(int *newval, void **extra, GucSource source);
static bool check_max_wal_senders(int *newval, void **extra, GucSource source);
static bool check_autovacuum_work_mem(int *newval, void **extra, GucSource source);
static bool check_effective_io_concurrency(int *newval, void **extra, GucSource source);
static bool check_maintenance_io_concurrency(int *newval, void **extra, GucSource source);
static bool check_huge_page_size(int *newval, void **extra, GucSource source);
static void assign_pgstat_temp_directory(const char *newval, void *extra);
static bool check_application_name(char **newval, void **extra, GucSource source);
static void assign_application_name(const char *newval, void *extra);
static bool check_cluster_name(char **newval, void **extra, GucSource source);
static const char *show_unix_socket_permissions(void);
static const char *show_log_file_mode(void);
static const char *show_data_directory_mode(void);
static bool check_backtrace_functions(char **newval, void **extra, GucSource source);
static void assign_backtrace_functions(const char *newval, void *extra);
static bool check_recovery_target_timeline(char **newval, void **extra, GucSource source);
static void assign_recovery_target_timeline(const char *newval, void *extra);
static bool check_recovery_target(char **newval, void **extra, GucSource source);
static void assign_recovery_target(const char *newval, void *extra);
static bool check_recovery_target_xid(char **newval, void **extra, GucSource source);
static void assign_recovery_target_xid(const char *newval, void *extra);
static bool check_recovery_target_time(char **newval, void **extra, GucSource source);
static void assign_recovery_target_time(const char *newval, void *extra);
static bool check_recovery_target_name(char **newval, void **extra, GucSource source);
static void assign_recovery_target_name(const char *newval, void *extra);
static bool check_recovery_target_lsn(char **newval, void **extra, GucSource source);
static void assign_recovery_target_lsn(const char *newval, void *extra);
static bool check_primary_slot_name(char **newval, void **extra, GucSource source);
static bool check_default_with_oids(bool *newval, void **extra, GucSource source);
/* Private functions in guc-file.l that need to be called from guc.c */
static ConfigVariable *ProcessConfigFileInternal(GucContext context,
bool applySettings, int elevel);
/*
* Options for enum values defined in this module.
*
* NOTE! Option values may not contain double quotes!
*/
static const struct config_enum_entry bytea_output_options[] = {
{"escape", BYTEA_OUTPUT_ESCAPE, false},
{"hex", BYTEA_OUTPUT_HEX, false},
{NULL, 0, false}
};
StaticAssertDecl(lengthof(bytea_output_options) == (BYTEA_OUTPUT_HEX + 2),
"array length mismatch");
/*
* We have different sets for client and server message level options because
* they sort slightly different (see "log" level), and because "fatal"/"panic"
* aren't sensible for client_min_messages.
*/
static const struct config_enum_entry client_message_level_options[] = {
{"debug5", DEBUG5, false},
{"debug4", DEBUG4, false},
{"debug3", DEBUG3, false},
{"debug2", DEBUG2, false},
{"debug1", DEBUG1, false},
{"debug", DEBUG2, true},
{"log", LOG, false},
{"info", INFO, true},
{"notice", NOTICE, false},
{"warning", WARNING, false},
{"error", ERROR, false},
{NULL, 0, false}
};
static const struct config_enum_entry server_message_level_options[] = {
{"debug5", DEBUG5, false},
{"debug4", DEBUG4, false},
{"debug3", DEBUG3, false},
{"debug2", DEBUG2, false},
{"debug1", DEBUG1, false},
{"debug", DEBUG2, true},
{"info", INFO, false},
{"notice", NOTICE, false},
{"warning", WARNING, false},
{"error", ERROR, false},
{"log", LOG, false},
{"fatal", FATAL, false},
{"panic", PANIC, false},
{NULL, 0, false}
};
static const struct config_enum_entry intervalstyle_options[] = {
{"postgres", INTSTYLE_POSTGRES, false},
{"postgres_verbose", INTSTYLE_POSTGRES_VERBOSE, false},
{"sql_standard", INTSTYLE_SQL_STANDARD, false},
{"iso_8601", INTSTYLE_ISO_8601, false},
{NULL, 0, false}
};
StaticAssertDecl(lengthof(intervalstyle_options) == (INTSTYLE_ISO_8601 + 2),
"array length mismatch");
static const struct config_enum_entry log_error_verbosity_options[] = {
{"terse", PGERROR_TERSE, false},
{"default", PGERROR_DEFAULT, false},
{"verbose", PGERROR_VERBOSE, false},
{NULL, 0, false}
};
StaticAssertDecl(lengthof(log_error_verbosity_options) == (PGERROR_VERBOSE + 2),
"array length mismatch");
static const struct config_enum_entry log_statement_options[] = {
{"none", LOGSTMT_NONE, false},
{"ddl", LOGSTMT_DDL, false},
{"mod", LOGSTMT_MOD, false},
{"all", LOGSTMT_ALL, false},
{NULL, 0, false}
};
StaticAssertDecl(lengthof(log_statement_options) == (LOGSTMT_ALL + 2),
"array length mismatch");
static const struct config_enum_entry isolation_level_options[] = {
{"serializable", XACT_SERIALIZABLE, false},
{"repeatable read", XACT_REPEATABLE_READ, false},
{"read committed", XACT_READ_COMMITTED, false},
{"read uncommitted", XACT_READ_UNCOMMITTED, false},
{NULL, 0}
};
static const struct config_enum_entry session_replication_role_options[] = {
{"origin", SESSION_REPLICATION_ROLE_ORIGIN, false},
{"replica", SESSION_REPLICATION_ROLE_REPLICA, false},
{"local", SESSION_REPLICATION_ROLE_LOCAL, false},
{NULL, 0, false}
};
StaticAssertDecl(lengthof(session_replication_role_options) == (SESSION_REPLICATION_ROLE_LOCAL + 2),
"array length mismatch");
static const struct config_enum_entry syslog_facility_options[] = {
#ifdef HAVE_SYSLOG
{"local0", LOG_LOCAL0, false},
{"local1", LOG_LOCAL1, false},
{"local2", LOG_LOCAL2, false},
{"local3", LOG_LOCAL3, false},
{"local4", LOG_LOCAL4, false},
{"local5", LOG_LOCAL5, false},
{"local6", LOG_LOCAL6, false},
{"local7", LOG_LOCAL7, false},
#else
{"none", 0, false},
#endif
{NULL, 0}
};
static const struct config_enum_entry track_function_options[] = {
{"none", TRACK_FUNC_OFF, false},
{"pl", TRACK_FUNC_PL, false},
{"all", TRACK_FUNC_ALL, false},
{NULL, 0, false}
};
StaticAssertDecl(lengthof(track_function_options) == (TRACK_FUNC_ALL + 2),
"array length mismatch");
static const struct config_enum_entry xmlbinary_options[] = {
{"base64", XMLBINARY_BASE64, false},
{"hex", XMLBINARY_HEX, false},
{NULL, 0, false}
};
StaticAssertDecl(lengthof(xmlbinary_options) == (XMLBINARY_HEX + 2),
"array length mismatch");
static const struct config_enum_entry xmloption_options[] = {
{"content", XMLOPTION_CONTENT, false},
{"document", XMLOPTION_DOCUMENT, false},
{NULL, 0, false}
};
StaticAssertDecl(lengthof(xmloption_options) == (XMLOPTION_CONTENT + 2),
"array length mismatch");
/*
* Although only "on", "off", and "safe_encoding" are documented, we
* accept all the likely variants of "on" and "off".
*/
static const struct config_enum_entry backslash_quote_options[] = {
{"safe_encoding", BACKSLASH_QUOTE_SAFE_ENCODING, false},
{"on", BACKSLASH_QUOTE_ON, false},
{"off", BACKSLASH_QUOTE_OFF, false},
{"true", BACKSLASH_QUOTE_ON, true},
{"false", BACKSLASH_QUOTE_OFF, true},
{"yes", BACKSLASH_QUOTE_ON, true},
{"no", BACKSLASH_QUOTE_OFF, true},
{"1", BACKSLASH_QUOTE_ON, true},
{"0", BACKSLASH_QUOTE_OFF, true},
{NULL, 0, false}
};
/*
* Although only "on", "off", and "partition" are documented, we
* accept all the likely variants of "on" and "off".
*/
static const struct config_enum_entry constraint_exclusion_options[] = {
{"partition", CONSTRAINT_EXCLUSION_PARTITION, false},
{"on", CONSTRAINT_EXCLUSION_ON, false},
{"off", CONSTRAINT_EXCLUSION_OFF, false},
{"true", CONSTRAINT_EXCLUSION_ON, true},
{"false", CONSTRAINT_EXCLUSION_OFF, true},
{"yes", CONSTRAINT_EXCLUSION_ON, true},
{"no", CONSTRAINT_EXCLUSION_OFF, true},
{"1", CONSTRAINT_EXCLUSION_ON, true},
{"0", CONSTRAINT_EXCLUSION_OFF, true},
{NULL, 0, false}
};
/*
* Although only "on", "off", "remote_apply", "remote_write", and "local" are
* documented, we accept all the likely variants of "on" and "off".
*/
static const struct config_enum_entry synchronous_commit_options[] = {
{"local", SYNCHRONOUS_COMMIT_LOCAL_FLUSH, false},
{"remote_write", SYNCHRONOUS_COMMIT_REMOTE_WRITE, false},
{"remote_apply", SYNCHRONOUS_COMMIT_REMOTE_APPLY, false},
{"on", SYNCHRONOUS_COMMIT_ON, false},
{"off", SYNCHRONOUS_COMMIT_OFF, false},
{"true", SYNCHRONOUS_COMMIT_ON, true},
{"false", SYNCHRONOUS_COMMIT_OFF, true},
{"yes", SYNCHRONOUS_COMMIT_ON, true},
{"no", SYNCHRONOUS_COMMIT_OFF, true},
{"1", SYNCHRONOUS_COMMIT_ON, true},
{"0", SYNCHRONOUS_COMMIT_OFF, true},
{NULL, 0, false}
};
/*
* Although only "on", "off", "try" are documented, we accept all the likely
* variants of "on" and "off".
*/
static const struct config_enum_entry huge_pages_options[] = {
{"off", HUGE_PAGES_OFF, false},
{"on", HUGE_PAGES_ON, false},
{"try", HUGE_PAGES_TRY, false},
{"true", HUGE_PAGES_ON, true},
{"false", HUGE_PAGES_OFF, true},
{"yes", HUGE_PAGES_ON, true},
{"no", HUGE_PAGES_OFF, true},
{"1", HUGE_PAGES_ON, true},
{"0", HUGE_PAGES_OFF, true},
{NULL, 0, false}
};
static const struct config_enum_entry force_parallel_mode_options[] = {
{"off", FORCE_PARALLEL_OFF, false},
{"on", FORCE_PARALLEL_ON, false},
{"regress", FORCE_PARALLEL_REGRESS, false},
{"true", FORCE_PARALLEL_ON, true},
{"false", FORCE_PARALLEL_OFF, true},
{"yes", FORCE_PARALLEL_ON, true},
{"no", FORCE_PARALLEL_OFF, true},
{"1", FORCE_PARALLEL_ON, true},
{"0", FORCE_PARALLEL_OFF, true},
{NULL, 0, false}
};
static const struct config_enum_entry plan_cache_mode_options[] = {
{"auto", PLAN_CACHE_MODE_AUTO, false},
{"force_generic_plan", PLAN_CACHE_MODE_FORCE_GENERIC_PLAN, false},
{"force_custom_plan", PLAN_CACHE_MODE_FORCE_CUSTOM_PLAN, false},
{NULL, 0, false}
};
static const struct config_enum_entry password_encryption_options[] = {
{"md5", PASSWORD_TYPE_MD5, false},
{"scram-sha-256", PASSWORD_TYPE_SCRAM_SHA_256, false},
{NULL, 0, false}
};
const struct config_enum_entry ssl_protocol_versions_info[] = {
{"", PG_TLS_ANY, false},
{"TLSv1", PG_TLS1_VERSION, false},
{"TLSv1.1", PG_TLS1_1_VERSION, false},
{"TLSv1.2", PG_TLS1_2_VERSION, false},
{"TLSv1.3", PG_TLS1_3_VERSION, false},
{NULL, 0, false}
};
StaticAssertDecl(lengthof(ssl_protocol_versions_info) == (PG_TLS1_3_VERSION + 2),
"array length mismatch");
static struct config_enum_entry shared_memory_options[] = {
#ifndef WIN32
{"sysv", SHMEM_TYPE_SYSV, false},
#endif
#ifndef EXEC_BACKEND
{"mmap", SHMEM_TYPE_MMAP, false},
#endif
#ifdef WIN32
{"windows", SHMEM_TYPE_WINDOWS, false},
#endif
{NULL, 0, false}
};
/*
* Options for enum values stored in other modules
*/
extern const struct config_enum_entry wal_level_options[];
extern const struct config_enum_entry archive_mode_options[];
extern const struct config_enum_entry recovery_target_action_options[];
extern const struct config_enum_entry sync_method_options[];
extern const struct config_enum_entry dynamic_shared_memory_options[];
/*
* GUC option variables that are exported from this module
*/
bool log_duration = false;
bool Debug_print_plan = false;
bool Debug_print_parse = false;
bool Debug_print_rewritten = false;
bool Debug_pretty_print = true;
bool log_parser_stats = false;
bool log_planner_stats = false;
bool log_executor_stats = false;
bool log_statement_stats = false; /* this is sort of all three above
* together */
bool log_btree_build_stats = false;
char *event_source;
bool row_security;
bool check_function_bodies = true;
/*
* This GUC exists solely for backward compatibility, check its definition for
* details.
*/
bool default_with_oids = false;
bool session_auth_is_superuser;
int log_min_error_statement = ERROR;
int log_min_messages = WARNING;
int client_min_messages = NOTICE;
int log_min_duration_sample = -1;
int log_min_duration_statement = -1;
int log_parameter_max_length = -1;
int log_parameter_max_length_on_error = 0;
int log_temp_files = -1;
double log_statement_sample_rate = 1.0;
double log_xact_sample_rate = 0;
int trace_recovery_messages = LOG;
char *backtrace_functions;
char *backtrace_symbol_list;
int temp_file_limit = -1;
int num_temp_buffers = 1024;
char *cluster_name = "";
char *ConfigFileName;
char *HbaFileName;
char *IdentFileName;
char *external_pid_file;
char *pgstat_temp_directory;
char *application_name;
int tcp_keepalives_idle;
int tcp_keepalives_interval;
int tcp_keepalives_count;
int tcp_user_timeout;
/*
* SSL renegotiation was been removed in PostgreSQL 9.5, but we tolerate it
* being set to zero (meaning never renegotiate) for backward compatibility.
* This avoids breaking compatibility with clients that have never supported
* renegotiation and therefore always try to zero it.
*/
int ssl_renegotiation_limit;
/*
* This really belongs in pg_shmem.c, but is defined here so that it doesn't
* need to be duplicated in all the different implementations of pg_shmem.c.
*/
int huge_pages;
int huge_page_size;
/*
* These variables are all dummies that don't do anything, except in some
* cases provide the value for SHOW to display. The real state is elsewhere
* and is kept in sync by assign_hooks.
*/
static char *syslog_ident_str;
static double phony_random_seed;
static char *client_encoding_string;
static char *datestyle_string;
static char *locale_collate;
static char *locale_ctype;
static char *server_encoding_string;
static char *server_version_string;
static int server_version_num;
static char *timezone_string;
static char *log_timezone_string;
static char *timezone_abbreviations_string;
static char *data_directory;
static char *session_authorization_string;
static int max_function_args;
static int max_index_keys;
static int max_identifier_length;
static int block_size;
static int segment_size;
static int wal_block_size;
static bool data_checksums;
static bool integer_datetimes;
static bool assert_enabled;
static char *recovery_target_timeline_string;
static char *recovery_target_string;
static char *recovery_target_xid_string;
static char *recovery_target_name_string;
static char *recovery_target_lsn_string;
/* should be static, but commands/variable.c needs to get at this */
char *role_string;
/*
* Displayable names for context types (enum GucContext)
*
* Note: these strings are deliberately not localized.
*/
const char *const GucContext_Names[] =
{
/* PGC_INTERNAL */ "internal",
/* PGC_POSTMASTER */ "postmaster",
/* PGC_SIGHUP */ "sighup",
/* PGC_SU_BACKEND */ "superuser-backend",
/* PGC_BACKEND */ "backend",
/* PGC_SUSET */ "superuser",
/* PGC_USERSET */ "user"
};
StaticAssertDecl(lengthof(GucContext_Names) == (PGC_USERSET + 1),
"array length mismatch");
/*
* Displayable names for source types (enum GucSource)
*
* Note: these strings are deliberately not localized.
*/
const char *const GucSource_Names[] =
{
/* PGC_S_DEFAULT */ "default",
/* PGC_S_DYNAMIC_DEFAULT */ "default",
/* PGC_S_ENV_VAR */ "environment variable",
/* PGC_S_FILE */ "configuration file",
/* PGC_S_ARGV */ "command line",
/* PGC_S_GLOBAL */ "global",
/* PGC_S_DATABASE */ "database",
/* PGC_S_USER */ "user",
/* PGC_S_DATABASE_USER */ "database user",
/* PGC_S_CLIENT */ "client",
/* PGC_S_OVERRIDE */ "override",
/* PGC_S_INTERACTIVE */ "interactive",
/* PGC_S_TEST */ "test",
/* PGC_S_SESSION */ "session"
};
StaticAssertDecl(lengthof(GucSource_Names) == (PGC_S_SESSION + 1),
"array length mismatch");
/*
* Displayable names for the groupings defined in enum config_group
*/
const char *const config_group_names[] =
{
/* UNGROUPED */
gettext_noop("Ungrouped"),
/* FILE_LOCATIONS */
gettext_noop("File Locations"),
/* CONN_AUTH */
gettext_noop("Connections and Authentication"),
/* CONN_AUTH_SETTINGS */
gettext_noop("Connections and Authentication / Connection Settings"),
/* CONN_AUTH_AUTH */
gettext_noop("Connections and Authentication / Authentication"),
/* CONN_AUTH_SSL */
gettext_noop("Connections and Authentication / SSL"),
/* RESOURCES */
gettext_noop("Resource Usage"),
/* RESOURCES_MEM */
gettext_noop("Resource Usage / Memory"),
/* RESOURCES_DISK */
gettext_noop("Resource Usage / Disk"),
/* RESOURCES_KERNEL */
gettext_noop("Resource Usage / Kernel Resources"),
/* RESOURCES_VACUUM_DELAY */
gettext_noop("Resource Usage / Cost-Based Vacuum Delay"),
/* RESOURCES_BGWRITER */
gettext_noop("Resource Usage / Background Writer"),
/* RESOURCES_ASYNCHRONOUS */
gettext_noop("Resource Usage / Asynchronous Behavior"),
/* WAL */
gettext_noop("Write-Ahead Log"),
/* WAL_SETTINGS */
gettext_noop("Write-Ahead Log / Settings"),
/* WAL_CHECKPOINTS */
gettext_noop("Write-Ahead Log / Checkpoints"),
/* WAL_ARCHIVING */
gettext_noop("Write-Ahead Log / Archiving"),
/* WAL_ARCHIVE_RECOVERY */
gettext_noop("Write-Ahead Log / Archive Recovery"),
/* WAL_RECOVERY_TARGET */
gettext_noop("Write-Ahead Log / Recovery Target"),
/* REPLICATION */
gettext_noop("Replication"),
/* REPLICATION_SENDING */
gettext_noop("Replication / Sending Servers"),
/* REPLICATION_PRIMARY */
gettext_noop("Replication / Primary Server"),
/* REPLICATION_STANDBY */
gettext_noop("Replication / Standby Servers"),
/* REPLICATION_SUBSCRIBERS */
gettext_noop("Replication / Subscribers"),
/* QUERY_TUNING */
gettext_noop("Query Tuning"),
/* QUERY_TUNING_METHOD */
gettext_noop("Query Tuning / Planner Method Configuration"),
/* QUERY_TUNING_COST */
gettext_noop("Query Tuning / Planner Cost Constants"),
/* QUERY_TUNING_GEQO */
gettext_noop("Query Tuning / Genetic Query Optimizer"),
/* QUERY_TUNING_OTHER */
gettext_noop("Query Tuning / Other Planner Options"),
/* LOGGING */
gettext_noop("Reporting and Logging"),
/* LOGGING_WHERE */
gettext_noop("Reporting and Logging / Where to Log"),
/* LOGGING_WHEN */
gettext_noop("Reporting and Logging / When to Log"),
/* LOGGING_WHAT */
gettext_noop("Reporting and Logging / What to Log"),
/* PROCESS_TITLE */
gettext_noop("Process Title"),
/* STATS */
gettext_noop("Statistics"),
/* STATS_MONITORING */
gettext_noop("Statistics / Monitoring"),
/* STATS_COLLECTOR */
gettext_noop("Statistics / Query and Index Statistics Collector"),
/* AUTOVACUUM */
gettext_noop("Autovacuum"),
/* CLIENT_CONN */
gettext_noop("Client Connection Defaults"),
/* CLIENT_CONN_STATEMENT */
gettext_noop("Client Connection Defaults / Statement Behavior"),
/* CLIENT_CONN_LOCALE */
gettext_noop("Client Connection Defaults / Locale and Formatting"),
/* CLIENT_CONN_PRELOAD */
gettext_noop("Client Connection Defaults / Shared Library Preloading"),
/* CLIENT_CONN_OTHER */
gettext_noop("Client Connection Defaults / Other Defaults"),
/* LOCK_MANAGEMENT */
gettext_noop("Lock Management"),
/* COMPAT_OPTIONS */
gettext_noop("Version and Platform Compatibility"),
/* COMPAT_OPTIONS_PREVIOUS */
gettext_noop("Version and Platform Compatibility / Previous PostgreSQL Versions"),
/* COMPAT_OPTIONS_CLIENT */
gettext_noop("Version and Platform Compatibility / Other Platforms and Clients"),
/* ERROR_HANDLING */
gettext_noop("Error Handling"),
/* PRESET_OPTIONS */
gettext_noop("Preset Options"),
/* CUSTOM_OPTIONS */
gettext_noop("Customized Options"),
/* DEVELOPER_OPTIONS */
gettext_noop("Developer Options"),
/* help_config wants this array to be null-terminated */
NULL
};
StaticAssertDecl(lengthof(config_group_names) == (DEVELOPER_OPTIONS + 2),
"array length mismatch");
/*
* Displayable names for GUC variable types (enum config_type)
*
* Note: these strings are deliberately not localized.
*/
const char *const config_type_names[] =
{
/* PGC_BOOL */ "bool",
/* PGC_INT */ "integer",
/* PGC_REAL */ "real",
/* PGC_STRING */ "string",
/* PGC_ENUM */ "enum"
};
StaticAssertDecl(lengthof(config_type_names) == (PGC_ENUM + 1),
"array length mismatch");
/*
* Unit conversion tables.
*
* There are two tables, one for memory units, and another for time units.
* For each supported conversion from one unit to another, we have an entry
* in the table.
*
* To keep things simple, and to avoid possible roundoff error,
* conversions are never chained. There needs to be a direct conversion
* between all units (of the same type).
*
* The conversions for each base unit must be kept in order from greatest to
* smallest human-friendly unit; convert_xxx_from_base_unit() rely on that.
* (The order of the base-unit groups does not matter.)
*/
#define MAX_UNIT_LEN 3 /* length of longest recognized unit string */
typedef struct
{
char unit[MAX_UNIT_LEN + 1]; /* unit, as a string, like "kB" or
* "min" */
int base_unit; /* GUC_UNIT_XXX */
double multiplier; /* Factor for converting unit -> base_unit */
} unit_conversion;
/* Ensure that the constants in the tables don't overflow or underflow */
#if BLCKSZ < 1024 || BLCKSZ > (1024*1024)
#error BLCKSZ must be between 1KB and 1MB
#endif
#if XLOG_BLCKSZ < 1024 || XLOG_BLCKSZ > (1024*1024)
#error XLOG_BLCKSZ must be between 1KB and 1MB
#endif
static const char *memory_units_hint = gettext_noop("Valid units for this parameter are \"B\", \"kB\", \"MB\", \"GB\", and \"TB\".");
static const unit_conversion memory_unit_conversion_table[] =
{
{"TB", GUC_UNIT_BYTE, 1024.0 * 1024.0 * 1024.0 * 1024.0},
{"GB", GUC_UNIT_BYTE, 1024.0 * 1024.0 * 1024.0},
{"MB", GUC_UNIT_BYTE, 1024.0 * 1024.0},
{"kB", GUC_UNIT_BYTE, 1024.0},
{"B", GUC_UNIT_BYTE, 1.0},
{"TB", GUC_UNIT_KB, 1024.0 * 1024.0 * 1024.0},
{"GB", GUC_UNIT_KB, 1024.0 * 1024.0},
{"MB", GUC_UNIT_KB, 1024.0},
{"kB", GUC_UNIT_KB, 1.0},
{"B", GUC_UNIT_KB, 1.0 / 1024.0},
{"TB", GUC_UNIT_MB, 1024.0 * 1024.0},
{"GB", GUC_UNIT_MB, 1024.0},
{"MB", GUC_UNIT_MB, 1.0},
{"kB", GUC_UNIT_MB, 1.0 / 1024.0},
{"B", GUC_UNIT_MB, 1.0 / (1024.0 * 1024.0)},
{"TB", GUC_UNIT_BLOCKS, (1024.0 * 1024.0 * 1024.0) / (BLCKSZ / 1024)},
{"GB", GUC_UNIT_BLOCKS, (1024.0 * 1024.0) / (BLCKSZ / 1024)},
{"MB", GUC_UNIT_BLOCKS, 1024.0 / (BLCKSZ / 1024)},
{"kB", GUC_UNIT_BLOCKS, 1.0 / (BLCKSZ / 1024)},
{"B", GUC_UNIT_BLOCKS, 1.0 / BLCKSZ},
{"TB", GUC_UNIT_XBLOCKS, (1024.0 * 1024.0 * 1024.0) / (XLOG_BLCKSZ / 1024)},
{"GB", GUC_UNIT_XBLOCKS, (1024.0 * 1024.0) / (XLOG_BLCKSZ / 1024)},
{"MB", GUC_UNIT_XBLOCKS, 1024.0 / (XLOG_BLCKSZ / 1024)},
{"kB", GUC_UNIT_XBLOCKS, 1.0 / (XLOG_BLCKSZ / 1024)},
{"B", GUC_UNIT_XBLOCKS, 1.0 / XLOG_BLCKSZ},
{""} /* end of table marker */
};
static const char *time_units_hint = gettext_noop("Valid units for this parameter are \"us\", \"ms\", \"s\", \"min\", \"h\", and \"d\".");
static const unit_conversion time_unit_conversion_table[] =
{
{"d", GUC_UNIT_MS, 1000 * 60 * 60 * 24},
{"h", GUC_UNIT_MS, 1000 * 60 * 60},
{"min", GUC_UNIT_MS, 1000 * 60},
{"s", GUC_UNIT_MS, 1000},
{"ms", GUC_UNIT_MS, 1},
{"us", GUC_UNIT_MS, 1.0 / 1000},
{"d", GUC_UNIT_S, 60 * 60 * 24},
{"h", GUC_UNIT_S, 60 * 60},
{"min", GUC_UNIT_S, 60},
{"s", GUC_UNIT_S, 1},
{"ms", GUC_UNIT_S, 1.0 / 1000},
{"us", GUC_UNIT_S, 1.0 / (1000 * 1000)},
{"d", GUC_UNIT_MIN, 60 * 24},
{"h", GUC_UNIT_MIN, 60},
{"min", GUC_UNIT_MIN, 1},
{"s", GUC_UNIT_MIN, 1.0 / 60},
{"ms", GUC_UNIT_MIN, 1.0 / (1000 * 60)},
{"us", GUC_UNIT_MIN, 1.0 / (1000 * 1000 * 60)},
{""} /* end of table marker */
};
/*
* Contents of GUC tables
*
* See src/backend/utils/misc/README for design notes.
*
* TO ADD AN OPTION:
*
* 1. Declare a global variable of type bool, int, double, or char*
* and make use of it.
*
* 2. Decide at what times it's safe to set the option. See guc.h for
* details.
*
* 3. Decide on a name, a default value, upper and lower bounds (if
* applicable), etc.
*
* 4. Add a record below.
*
* 5. Add it to src/backend/utils/misc/postgresql.conf.sample, if
* appropriate.
*
* 6. Don't forget to document the option (at least in config.sgml).
*
* 7. If it's a new GUC_LIST_QUOTE option, you must add it to
* variable_is_guc_list_quote() in src/bin/pg_dump/dumputils.c.
*/
/******** option records follow ********/
static struct config_bool ConfigureNamesBool[] =
{
{
{"enable_seqscan", PGC_USERSET, QUERY_TUNING_METHOD,
gettext_noop("Enables the planner's use of sequential-scan plans."),
NULL,
GUC_EXPLAIN
},
&enable_seqscan,
true,
NULL, NULL, NULL
},
{
{"enable_indexscan", PGC_USERSET, QUERY_TUNING_METHOD,
gettext_noop("Enables the planner's use of index-scan plans."),
NULL,
GUC_EXPLAIN
},
&enable_indexscan,
true,
NULL, NULL, NULL
},
{
{"enable_indexonlyscan", PGC_USERSET, QUERY_TUNING_METHOD,
gettext_noop("Enables the planner's use of index-only-scan plans."),
NULL,
GUC_EXPLAIN
},
&enable_indexonlyscan,
true,
NULL, NULL, NULL
},
{
{"enable_bitmapscan", PGC_USERSET, QUERY_TUNING_METHOD,
gettext_noop("Enables the planner's use of bitmap-scan plans."),
NULL,
GUC_EXPLAIN
},
&enable_bitmapscan,
true,
NULL, NULL, NULL
},
{
{"enable_tidscan", PGC_USERSET, QUERY_TUNING_METHOD,
gettext_noop("Enables the planner's use of TID scan plans."),
NULL,
GUC_EXPLAIN
},
&enable_tidscan,
true,
NULL, NULL, NULL
},
{
{"enable_sort", PGC_USERSET, QUERY_TUNING_METHOD,
gettext_noop("Enables the planner's use of explicit sort steps."),
NULL,
GUC_EXPLAIN
},
&enable_sort,
true,
NULL, NULL, NULL
},
{
{"enable_incremental_sort", PGC_USERSET, QUERY_TUNING_METHOD,
gettext_noop("Enables the planner's use of incremental sort steps."),
NULL
},
&enable_incremental_sort,
true,
NULL, NULL, NULL
},
{
{"enable_hashagg", PGC_USERSET, QUERY_TUNING_METHOD,