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synced 2025-03-07 19:47:50 +08:00
Added new group of read-only GUC variables to allow simple access
to certain compile-time options (FUNC_MAX_ARGS, INDEX_MAX_KEYS, NAMEDATALEN, BLCKSZ, HAVE_INT64_TIMESTAMP). Also added "category", "short_desc", and "extra_desc" to the pg_settings view. Per recent discussion here: http://archives.postgresql.org/pgsql-patches/2003-11/msg00363.php
This commit is contained in:
Joe Conway
parent
7f8f7665fc
commit
66989aa2d6
@ -3,7 +3,7 @@
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*
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* Copyright 1996-2003, PostgreSQL Global Development Group
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*
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* $PostgreSQL: pgsql/src/backend/catalog/system_views.sql,v 1.3 2003/11/29 22:39:40 pgsql Exp $
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* $PostgreSQL: pgsql/src/backend/catalog/system_views.sql,v 1.4 2003/12/03 18:52:00 joe Exp $
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*/
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CREATE VIEW pg_user AS
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@ -260,8 +260,8 @@ CREATE VIEW pg_locks AS
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CREATE VIEW pg_settings AS
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SELECT *
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FROM pg_show_all_settings() AS A
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(name text, setting text, context text, vartype text,
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source text, min_val text, max_val text);
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(name text, setting text, category text, short_desc text, extra_desc text,
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context text, vartype text, source text, min_val text, max_val text);
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CREATE RULE pg_settings_u AS
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ON UPDATE TO pg_settings
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@ -10,7 +10,7 @@
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* Written by Peter Eisentraut <peter_e@gmx.net>.
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*
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* IDENTIFICATION
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* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.174 2003/12/01 22:08:00 momjian Exp $
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* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.175 2003/12/03 18:52:00 joe Exp $
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*
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*--------------------------------------------------------------------
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*/
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@ -158,7 +158,11 @@ static char *server_version_string;
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static char *session_authorization_string;
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static char *timezone_string;
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static char *XactIsoLevel_string;
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static int max_function_args;
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static int max_index_keys;
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static int max_identifier_length;
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static int block_size;
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static bool integer_datetimes;
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/* Macros for freeing malloc'd pointers only if appropriate to do so */
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/* Some of these tests are probably redundant, but be safe ... */
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@ -304,6 +308,8 @@ const char *const config_group_names[] =
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gettext_noop("Version and Platform Compatibility / Other Platforms and Clients"),
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/* DEVELOPER_OPTIONS */
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gettext_noop("Developer Options"),
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/* COMPILE_OPTIONS */
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gettext_noop("Compiled-in Options"),
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/* help_config wants this array to be null-terminated */
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NULL
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};
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@ -842,6 +848,20 @@ static struct config_bool ConfigureNamesBool[] =
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true, NULL, NULL
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},
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{
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{"integer_datetimes", PGC_INTERNAL, COMPILE_OPTIONS,
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gettext_noop("Datetimes are integer based"),
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NULL,
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GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
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},
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&integer_datetimes,
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#ifdef HAVE_INT64_TIMESTAMP
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true, NULL, NULL
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#else
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false, NULL, NULL
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#endif
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},
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/* End-of-list marker */
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{
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{NULL, 0, 0, NULL, NULL}, NULL, false, NULL, NULL
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@ -1238,6 +1258,46 @@ static struct config_int ConfigureNamesInt[] =
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100, 1, 1000, NULL, NULL
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},
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{
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{"max_function_args", PGC_INTERNAL, COMPILE_OPTIONS,
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gettext_noop("Shows the maximum number of function arguments"),
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NULL,
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GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
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},
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&max_function_args,
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FUNC_MAX_ARGS, FUNC_MAX_ARGS, FUNC_MAX_ARGS, NULL, NULL
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},
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{
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{"max_index_keys", PGC_INTERNAL, COMPILE_OPTIONS,
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gettext_noop("Shows the maximum number of index keys"),
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NULL,
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GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
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},
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&max_index_keys,
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INDEX_MAX_KEYS, INDEX_MAX_KEYS, INDEX_MAX_KEYS, NULL, NULL
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},
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{
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{"max_identifier_length", PGC_INTERNAL, COMPILE_OPTIONS,
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gettext_noop("Shows the maximum identifier length"),
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NULL,
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GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
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},
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&max_identifier_length,
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NAMEDATALEN - 1, NAMEDATALEN - 1, NAMEDATALEN - 1, NULL, NULL
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},
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{
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{"block_size", PGC_INTERNAL, COMPILE_OPTIONS,
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gettext_noop("Shows size of a disk block"),
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NULL,
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GUC_NOT_IN_SAMPLE | GUC_DISALLOW_IN_FILE
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},
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&block_size,
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BLCKSZ, BLCKSZ, BLCKSZ, NULL, NULL
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},
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/* End-of-list marker */
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{
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{NULL, 0, 0, NULL, NULL}, NULL, 0, 0, 0, NULL, NULL
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@ -3478,14 +3538,23 @@ GetConfigOptionByNum(int varnum, const char **values, bool *noshow)
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/* setting : use _ShowOption in order to avoid duplicating the logic */
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values[1] = _ShowOption(conf);
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/* group */
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values[2] = config_group_names[conf->group];
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/* short_desc */
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values[3] = conf->short_desc;
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/* extra_desc */
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values[4] = conf->long_desc;
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/* context */
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values[2] = GucContext_Names[conf->context];
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values[5] = GucContext_Names[conf->context];
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/* vartype */
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values[3] = config_type_names[conf->vartype];
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values[6] = config_type_names[conf->vartype];
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/* source */
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values[4] = GucSource_Names[conf->source];
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values[7] = GucSource_Names[conf->source];
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/* now get the type specifc attributes */
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switch (conf->vartype)
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@ -3493,10 +3562,10 @@ GetConfigOptionByNum(int varnum, const char **values, bool *noshow)
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case PGC_BOOL:
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{
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/* min_val */
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values[5] = NULL;
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values[8] = NULL;
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/* max_val */
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values[6] = NULL;
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values[9] = NULL;
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}
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break;
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@ -3506,11 +3575,11 @@ GetConfigOptionByNum(int varnum, const char **values, bool *noshow)
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/* min_val */
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snprintf(buffer, sizeof(buffer), "%d", lconf->min);
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values[5] = pstrdup(buffer);
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values[8] = pstrdup(buffer);
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/* max_val */
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snprintf(buffer, sizeof(buffer), "%d", lconf->max);
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values[6] = pstrdup(buffer);
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values[9] = pstrdup(buffer);
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}
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break;
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@ -3520,21 +3589,21 @@ GetConfigOptionByNum(int varnum, const char **values, bool *noshow)
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/* min_val */
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snprintf(buffer, sizeof(buffer), "%g", lconf->min);
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values[5] = pstrdup(buffer);
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values[8] = pstrdup(buffer);
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/* max_val */
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snprintf(buffer, sizeof(buffer), "%g", lconf->max);
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values[6] = pstrdup(buffer);
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values[9] = pstrdup(buffer);
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}
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break;
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case PGC_STRING:
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{
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/* min_val */
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values[5] = NULL;
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values[8] = NULL;
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/* max_val */
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values[6] = NULL;
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values[9] = NULL;
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}
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break;
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@ -3546,10 +3615,10 @@ GetConfigOptionByNum(int varnum, const char **values, bool *noshow)
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*/
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/* min_val */
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values[5] = NULL;
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values[8] = NULL;
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/* max_val */
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values[6] = NULL;
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values[9] = NULL;
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}
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break;
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}
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@ -3592,7 +3661,7 @@ show_config_by_name(PG_FUNCTION_ARGS)
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* show_all_settings - equiv to SHOW ALL command but implemented as
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* a Table Function.
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*/
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#define NUM_PG_SETTINGS_ATTS 7
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#define NUM_PG_SETTINGS_ATTS 10
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Datum
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show_all_settings(PG_FUNCTION_ARGS)
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@ -3626,15 +3695,21 @@ show_all_settings(PG_FUNCTION_ARGS)
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TEXTOID, -1, 0, false);
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TupleDescInitEntry(tupdesc, (AttrNumber) 2, "setting",
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TEXTOID, -1, 0, false);
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TupleDescInitEntry(tupdesc, (AttrNumber) 3, "context",
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TupleDescInitEntry(tupdesc, (AttrNumber) 3, "category",
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TEXTOID, -1, 0, false);
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TupleDescInitEntry(tupdesc, (AttrNumber) 4, "vartype",
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TupleDescInitEntry(tupdesc, (AttrNumber) 4, "short_desc",
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TEXTOID, -1, 0, false);
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TupleDescInitEntry(tupdesc, (AttrNumber) 5, "source",
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TupleDescInitEntry(tupdesc, (AttrNumber) 5, "extra_desc",
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TEXTOID, -1, 0, false);
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TupleDescInitEntry(tupdesc, (AttrNumber) 6, "min_val",
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TupleDescInitEntry(tupdesc, (AttrNumber) 6, "context",
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TEXTOID, -1, 0, false);
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TupleDescInitEntry(tupdesc, (AttrNumber) 7, "max_val",
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TupleDescInitEntry(tupdesc, (AttrNumber) 7, "vartype",
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TEXTOID, -1, 0, false);
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TupleDescInitEntry(tupdesc, (AttrNumber) 8, "source",
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TEXTOID, -1, 0, false);
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TupleDescInitEntry(tupdesc, (AttrNumber) 9, "min_val",
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TEXTOID, -1, 0, false);
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TupleDescInitEntry(tupdesc, (AttrNumber) 10, "max_val",
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TEXTOID, -1, 0, false);
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/* allocate a slot for a tuple with this tupdesc */
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@ -7,7 +7,7 @@
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*
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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*
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* $PostgreSQL: pgsql/src/include/utils/guc_tables.h,v 1.7 2003/11/29 22:41:15 pgsql Exp $
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* $PostgreSQL: pgsql/src/include/utils/guc_tables.h,v 1.8 2003/12/03 18:52:00 joe Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -50,7 +50,8 @@ enum config_group
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COMPAT_OPTIONS,
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COMPAT_OPTIONS_PREVIOUS,
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COMPAT_OPTIONS_CLIENT,
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DEVELOPER_OPTIONS
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DEVELOPER_OPTIONS,
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COMPILE_OPTIONS
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};
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/*
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@ -1278,7 +1278,7 @@ SELECT viewname, definition FROM pg_views WHERE schemaname <> 'information_schem
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pg_indexes | SELECT n.nspname AS schemaname, c.relname AS tablename, i.relname AS indexname, pg_get_indexdef(i.oid) AS indexdef FROM (((pg_index x JOIN pg_class c ON ((c.oid = x.indrelid))) JOIN pg_class i ON ((i.oid = x.indexrelid))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE ((c.relkind = 'r'::"char") AND (i.relkind = 'i'::"char"));
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pg_locks | SELECT l.relation, l."database", l."transaction", l.pid, l."mode", l.granted FROM pg_lock_status() l(relation oid, "database" oid, "transaction" xid, pid integer, "mode" text, granted boolean);
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pg_rules | SELECT n.nspname AS schemaname, c.relname AS tablename, r.rulename, pg_get_ruledef(r.oid) AS definition FROM ((pg_rewrite r JOIN pg_class c ON ((c.oid = r.ev_class))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (r.rulename <> '_RETURN'::name);
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pg_settings | SELECT a.name, a.setting, a.context, a.vartype, a.source, a.min_val, a.max_val FROM pg_show_all_settings() a(name text, setting text, context text, vartype text, source text, min_val text, max_val text);
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pg_settings | SELECT a.name, a.setting, a.category, a.short_desc, a.extra_desc, a.context, a.vartype, a.source, a.min_val, a.max_val FROM pg_show_all_settings() a(name text, setting text, category text, short_desc text, extra_desc text, context text, vartype text, source text, min_val text, max_val text);
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pg_stat_activity | SELECT d.oid AS datid, d.datname, pg_stat_get_backend_pid(s.backendid) AS procpid, pg_stat_get_backend_userid(s.backendid) AS usesysid, u.usename, pg_stat_get_backend_activity(s.backendid) AS current_query, pg_stat_get_backend_activity_start(s.backendid) AS query_start FROM pg_database d, (SELECT pg_stat_get_backend_idset() AS backendid) s, pg_shadow u WHERE ((pg_stat_get_backend_dbid(s.backendid) = d.oid) AND (pg_stat_get_backend_userid(s.backendid) = u.usesysid));
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pg_stat_all_indexes | SELECT c.oid AS relid, i.oid AS indexrelid, n.nspname AS schemaname, c.relname, i.relname AS indexrelname, pg_stat_get_numscans(i.oid) AS idx_scan, pg_stat_get_tuples_returned(i.oid) AS idx_tup_read, pg_stat_get_tuples_fetched(i.oid) AS idx_tup_fetch FROM (((pg_class c JOIN pg_index x ON ((c.oid = x.indrelid))) JOIN pg_class i ON ((i.oid = x.indexrelid))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (c.relkind = 'r'::"char");
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pg_stat_all_tables | SELECT c.oid AS relid, n.nspname AS schemaname, c.relname, pg_stat_get_numscans(c.oid) AS seq_scan, pg_stat_get_tuples_returned(c.oid) AS seq_tup_read, sum(pg_stat_get_numscans(i.indexrelid)) AS idx_scan, sum(pg_stat_get_tuples_fetched(i.indexrelid)) AS idx_tup_fetch, pg_stat_get_tuples_inserted(c.oid) AS n_tup_ins, pg_stat_get_tuples_updated(c.oid) AS n_tup_upd, pg_stat_get_tuples_deleted(c.oid) AS n_tup_del FROM ((pg_class c LEFT JOIN pg_index i ON ((c.oid = i.indrelid))) LEFT JOIN pg_namespace n ON ((n.oid = c.relnamespace))) WHERE (c.relkind = 'r'::"char") GROUP BY c.oid, n.nspname, c.relname;
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