reset all: command line and .conf options change defaults

on RESET ALL those are restored.

show all: GUC + non-GUC.

SHOW ALL, RESET ALL

Marko Kreen

doc/src/sgml/ref/reset.sgml

 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/reset.sgml,v 1.10 2000/12/25 23:15:26 petere Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/reset.sgml,v 1.11 2001/06/07 04:50:56 momjian Exp $
 Postgres documentation
 -->
 
@@ -16,6 +16,9 @@ Postgres documentation
   <synopsis>
 RESET <replaceable class="PARAMETER">variable</replaceable>
   </synopsis>
+  <synopsis>
+RESET ALL
+  </synopsis>
 
   <refsect2 id="R2-SQL-RESET-1">
    <title>Inputs</title>
@@ -30,6 +33,14 @@ RESET <replaceable class="PARAMETER">variable</replaceable>
        </para>
       </listitem>
      </varlistentry>
+     <varlistentry>
+      <term>ALL</term>
+      <listitem>
+       <para>
+        Resets all run-time parameters to default values.
+       </para>
+      </listitem>
+     </varlistentry>
     </variablelist>
    </para>
   </refsect2>

doc/src/sgml/ref/show.sgml

 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/show.sgml,v 1.11 2000/12/25 23:15:26 petere Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/show.sgml,v 1.12 2001/06/07 04:50:56 momjian Exp $
 Postgres documentation
 -->
 
@@ -16,6 +16,9 @@ Postgres documentation
   <synopsis>
 SHOW <replaceable class="PARAMETER">name</replaceable>
   </synopsis>
+  <synopsis>
+SHOW ALL
+  </synopsis>
 
   <refsect2 id="R2-SQL-SHOW-1">
    <title>Inputs</title>
@@ -32,6 +35,14 @@ SHOW <replaceable class="PARAMETER">name</replaceable>
        </para>
       </listitem>
      </varlistentry>
+     <varlistentry>
+      <term>ALL</term>
+      <listitem>
+       <para>
+        Show all current session parameters.
+       </para>
+      </listitem>
+     </varlistentry>
     </variablelist>
    </para>
   </refsect2>

src/backend/commands/variable.c

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/commands/variable.c,v 1.48 2001/05/08 21:06:42 petere Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/commands/variable.c,v 1.49 2001/06/07 04:50:56 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -39,9 +39,9 @@
 #endif
 
 
-static bool show_date(void);
-static bool reset_date(void);
-static bool parse_date(char *);
+static bool show_datestyle(void);
+static bool reset_datestyle(void);
+static bool parse_datestyle(char *);
 static bool show_timezone(void);
 static bool reset_timezone(void);
 static bool parse_timezone(char *);
@@ -192,7 +192,7 @@ static int	DefaultDateStyle;
 static bool DefaultEuroDates;
 
 static bool
-parse_date(char *value)
+parse_datestyle(char *value)
 {
 	char	   *tok;
 	int			dcnt = 0,
@@ -200,7 +200,7 @@ parse_date(char *value)
 
 	if (value == NULL)
 	{
-		reset_date();
+		reset_datestyle();
 		return TRUE;
 	}
 
@@ -261,7 +261,7 @@ parse_date(char *value)
 }
 
 static bool
-show_date(void)
+show_datestyle(void)
 {
 	char		buf[64];
 
@@ -291,7 +291,7 @@ show_date(void)
 }
 
 static bool
-reset_date(void)
+reset_datestyle(void)
 {
 	DateStyle = DefaultDateStyle;
 	EuroDates = DefaultEuroDates;
@@ -325,7 +325,7 @@ set_default_datestyle(void)
 	DBDate = strdup(DBDate);
 
 	/* Parse desired setting into DateStyle/EuroDates */
-	parse_date(DBDate);
+	parse_datestyle(DBDate);
 
 	free(DBDate);
 
@@ -396,7 +396,7 @@ show_timezone(void)
 
 	tz = getenv("TZ");
 
-	elog(NOTICE, "Time zone is %s", ((tz != NULL) ? tz : "unknown"));
+	elog(NOTICE, "Time zone is %s", ((tz != NULL) ? tz : "unset"));
 
 	return TRUE;
 }	/* show_timezone() */
@@ -586,7 +586,7 @@ parse_random_seed(char *value)
 static bool
 show_random_seed(void)
 {
-	elog(NOTICE, "Seed for random number generator is not known");
+	elog(NOTICE, "Seed for random number generator is unavailable");
 	return (TRUE);
 }
 
@@ -708,7 +708,7 @@ SetPGVariable(const char *name, const char *value)
 	 * Special cases ought to be removed and handled separately by TCOP
 	 */
 	if (strcasecmp(name, "datestyle") == 0)
-		parse_date(mvalue);
+		parse_datestyle(mvalue);
 	else if (strcasecmp(name, "timezone") == 0)
 		parse_timezone(mvalue);
 	else if (strcasecmp(name, "DefaultXactIsoLevel") == 0)
@@ -724,18 +724,17 @@ SetPGVariable(const char *name, const char *value)
 	else if (strcasecmp(name, "session_authorization") == 0)
 		SetSessionAuthorization(value);
 	else
-		SetConfigOption(name, value, superuser() ? PGC_SUSET : PGC_USERSET);
+		SetConfigOption(name, value, superuser() ? PGC_SUSET : PGC_USERSET, false);
 
 	if (mvalue)
 		pfree(mvalue);
 }
 
-
 void
 GetPGVariable(const char *name)
 {
 	if (strcasecmp(name, "datestyle") == 0)
-		show_date();
+		show_datestyle();
 	else if (strcasecmp(name, "timezone") == 0)
 		show_timezone();
 	else if (strcasecmp(name, "DefaultXactIsoLevel") == 0)
@@ -748,7 +747,17 @@ GetPGVariable(const char *name)
 		show_server_encoding();
 	else if (strcasecmp(name, "seed") == 0)
 		show_random_seed();
-	else
+	else if (strcasecmp(name, "all") == 0)
+	{
+		ShowAllGUCConfig();
+		show_datestyle();
+		show_timezone();
+		show_DefaultXactIsoLevel();
+		show_XactIsoLevel();
+		show_client_encoding();
+		show_server_encoding();
+		show_random_seed();
+	} else
 	{
 		const char *val = GetConfigOption(name);
 
@@ -760,7 +769,7 @@ void
 ResetPGVariable(const char *name)
 {
 	if (strcasecmp(name, "datestyle") == 0)
-		reset_date();
+		reset_datestyle();
 	else if (strcasecmp(name, "timezone") == 0)
 		reset_timezone();
 	else if (strcasecmp(name, "DefaultXactIsoLevel") == 0)
@@ -773,6 +782,17 @@ ResetPGVariable(const char *name)
 		reset_server_encoding();
 	else if (strcasecmp(name, "seed") == 0)
 		reset_random_seed();
-	else
-		SetConfigOption(name, NULL, superuser() ? PGC_SUSET : PGC_USERSET);
+	else if (strcasecmp(name, "all") == 0)
+	{
+		reset_DefaultXactIsoLevel();
+		reset_XactIsoLevel();
+		reset_random_seed();
+		/* reset_server_encoding(); */
+		reset_client_encoding();
+		reset_datestyle();
+		reset_timezone();
+
+		ResetAllOptions();
+	} else
+		SetConfigOption(name, NULL, superuser() ? PGC_SUSET : PGC_USERSET, false);
 }

src/backend/parser/gram.y

@@ -11,7 +11,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.228 2001/06/04 23:27:23 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.229 2001/06/07 04:50:56 momjian Exp $
  *
  * HISTORY
  *	  AUTHOR			DATE			MAJOR EVENT
@@ -860,6 +860,12 @@ VariableShowStmt:  SHOW ColId
 					n->name  = "timezone";
 					$$ = (Node *) n;
 				}
+		| SHOW ALL
+				{
+					VariableShowStmt *n = makeNode(VariableShowStmt);
+					n->name  = "all";
+					$$ = (Node *) n;
+				}
 		| SHOW TRANSACTION ISOLATION LEVEL
 				{
 					VariableShowStmt *n = makeNode(VariableShowStmt);
@@ -886,6 +892,12 @@ VariableResetStmt:	RESET ColId
 					n->name  = "XactIsoLevel";
 					$$ = (Node *) n;
 				}
+		| RESET ALL
+				{
+					VariableResetStmt *n = makeNode(VariableResetStmt);
+					n->name  = "all";
+					$$ = (Node *) n;
+				}
 		;
 
 

src/backend/postmaster/postmaster.c

@@ -28,7 +28,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.216 2001/06/03 14:53:56 petere Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.217 2001/06/07 04:50:57 momjian Exp $
  *
  * NOTES
  *
@@ -533,7 +533,7 @@ PostmasterMain(int argc, char *argv[])
 							elog(ERROR, "-c %s requires argument", optarg);
 					}
 
-					SetConfigOption(name, value, PGC_POSTMASTER);
+					SetConfigOption(name, value, PGC_POSTMASTER, true);
 					free(name);
 					if (value)
 						free(value);

src/backend/tcop/postgres.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.218 2001/04/14 19:11:45 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.219 2001/06/07 04:50:57 momjian Exp $
  *
  * NOTES
  *	  this is the "main" module of the postgres backend and
@@ -1462,7 +1462,7 @@ PostgresMain(int argc, char *argv[], int real_argc, char *real_argv[], const cha
 
 					/* all options are allowed if not under postmaster */
 					SetConfigOption(name, value,
-					 (IsUnderPostmaster) ? PGC_BACKEND : PGC_POSTMASTER);
+					 (IsUnderPostmaster) ? PGC_BACKEND : PGC_POSTMASTER, true);
 					free(name);
 					if (value)
 						free(value);
@@ -1709,7 +1709,7 @@ PostgresMain(int argc, char *argv[], int real_argc, char *real_argv[], const cha
 	if (!IsUnderPostmaster)
 	{
 		puts("\nPOSTGRES backend interactive interface ");
-		puts("$Revision: 1.218 $ $Date: 2001/04/14 19:11:45 $\n");
+		puts("$Revision: 1.219 $ $Date: 2001/06/07 04:50:57 $\n");
 	}
 
 	/*

src/backend/utils/misc/guc-file.l

@@ -4,7 +4,7 @@
  *
  * Copyright 2000 by PostgreSQL Global Development Group
  *
- * $Header: /cvsroot/pgsql/src/backend/utils/misc/guc-file.l,v 1.7 2001/06/01 20:29:43 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/misc/guc-file.l,v 1.8 2001/06/07 04:50:57 momjian Exp $
  */
 
 %{
@@ -260,13 +260,13 @@ ProcessConfigFile(GucContext context)
 	 */
     for(item = head; item; item=item->next)
 	{
-		if (!set_config_option(item->name, item->value, context, false))
+		if (!set_config_option(item->name, item->value, context, false, false))
 			goto cleanup_exit;
 	}
 
     /* If we got here all the options parsed okay. */
 	for(item = head; item; item=item->next)
-		set_config_option(item->name, item->value, context, true);
+		set_config_option(item->name, item->value, context, true, true);
 
  cleanup_exit:
 	free_name_value_list(head);

src/backend/utils/misc/guc.c

@@ -4,7 +4,7 @@
  * Support for grand unified configuration scheme, including SET
  * command, configuration file, and command line options.
  *
- * $Header: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v 1.36 2001/05/17 17:44:18 petere Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/misc/guc.c,v 1.37 2001/06/07 04:50:57 momjian Exp $
  *
  * Copyright 2000 by PostgreSQL Global Development Group
  * Written by Peter Eisentraut <peter_e@gmx.net>.
@@ -136,9 +136,10 @@ struct config_string
 	const char *name;
 	GucContext	context;
 	char	  **variable;
-	const char *default_val;
+	const char *boot_default_val;
 	bool		(*parse_hook) (const char *proposed);
 	void		(*assign_hook) (const char *newval);
+	char		*default_val;
 };
 
 
@@ -433,6 +434,15 @@ ResetAllOptions(void)
 	{
 		char	   *str = NULL;
 
+		if (!ConfigureNamesString[i].default_val
+				&& ConfigureNamesString[i].boot_default_val)
+		{
+			str = strdup(ConfigureNamesString[i].boot_default_val);
+			if (str == NULL)
+				elog(ERROR, "out of memory");
+
+			ConfigureNamesString[i].default_val = str;
+		}
 		if (ConfigureNamesString[i].default_val)
 		{
 			str = strdup(ConfigureNamesString[i].default_val);
@@ -582,7 +592,7 @@ parse_real(const char *value, double *result)
  */
 bool
 set_config_option(const char *name, const char *value, GucContext
-				  context, bool DoIt)
+				  context, bool DoIt, bool makeDefault)
 {
 	struct config_generic *record;
 	enum config_type type;
@@ -653,7 +663,11 @@ set_config_option(const char *name, const char *value, GucContext
 						return false;
 					}
 					if (DoIt)
+					{
 						*conf->variable = boolval;
+						if (makeDefault)
+							conf->default_val = boolval;
+					}
 				}
 				else if (DoIt)
 					*conf->variable = conf->default_val;
@@ -681,7 +695,11 @@ set_config_option(const char *name, const char *value, GucContext
 						return false;
 					}
 					if (DoIt)
+					{
 						*conf->variable = intval;
+						if (makeDefault)
+							conf->default_val = intval;
+					}
 				}
 				else if (DoIt)
 					*conf->variable = conf->default_val;
@@ -709,7 +727,11 @@ set_config_option(const char *name, const char *value, GucContext
 						return false;
 					}
 					if (DoIt)
+					{
 						*conf->variable = dval;
+						if (makeDefault)
+							conf->default_val = dval;
+					}
 				}
 				else if (DoIt)
 					*conf->variable = conf->default_val;
@@ -742,12 +764,33 @@ set_config_option(const char *name, const char *value, GucContext
 						if (*conf->variable)
 							free(*conf->variable);
 						*conf->variable = str;
+						if (makeDefault)
+						{
+							if (conf->default_val)
+								free(conf->default_val);
+							str = strdup(value);
+							if (str == NULL) {
+								elog(elevel, "out of memory");
+								return false;
+							}
+							conf->default_val = str;
+						}
 					}
 				}
 				else if (DoIt)
 				{
 					char	   *str;
 
+					if (!conf->default_val && conf->boot_default_val)
+					{
+						str = strdup(conf->boot_default_val);
+						if (str == NULL)
+						{
+							elog(elevel, "out of memory");
+							return false;
+						}
+						conf->boot_default_val = str;
+					}
 					str = strdup(conf->default_val);
 					if (str == NULL)
 					{
@@ -776,9 +819,9 @@ set_config_option(const char *name, const char *value, GucContext
  */
 void
 SetConfigOption(const char *name, const char *value, GucContext
-				context)
+				context, bool makeDefault)
 {
-	(void) set_config_option(name, value, context, true);
+	(void) set_config_option(name, value, context, true, makeDefault);
 }
 
 
@@ -826,6 +869,58 @@ GetConfigOption(const char *name)
 	return NULL;
 }
 
+static void
+_ShowOption(enum config_type opttype, struct config_generic *record)
+{
+	static char buffer[256];
+	char *val;
+
+	switch (opttype)
+	{
+		case PGC_BOOL:
+			val = *((struct config_bool *) record)->variable ? "on" : "off";
+			break;
+		case PGC_INT:
+			snprintf(buffer, 256, "%d", *((struct config_int *) record)->variable);
+			val = buffer;
+			break;
+
+		case PGC_REAL:
+			snprintf(buffer, 256, "%g", *((struct config_real *) record)->variable);
+			val = buffer;
+			break;
+
+		case PGC_STRING:
+			val = strlen(*((struct config_string *) record)->variable) != 0 ?
+				*((struct config_string *) record)->variable : "unset";
+			break;
+
+		default:
+			val = "???";
+	}
+	elog(NOTICE, "%s is %s", record->name, val);
+}
+
+void
+ShowAllGUCConfig(void)
+{
+	int			i;
+
+	for (i = 0; ConfigureNamesBool[i].name; i++)
+		_ShowOption(PGC_BOOL, (struct config_generic *)&ConfigureNamesBool[i]);
+
+	for (i = 0; ConfigureNamesInt[i].name; i++)
+		_ShowOption(PGC_INT, (struct config_generic *)&ConfigureNamesInt[i]);
+
+	for (i = 0; ConfigureNamesReal[i].name; i++)
+		_ShowOption(PGC_REAL, (struct config_generic *)&ConfigureNamesReal[i]);
+
+	for (i = 0; ConfigureNamesString[i].name; i++)
+		_ShowOption(PGC_STRING, (struct config_generic *)&ConfigureNamesString[i]);
+}
+
+
+
 
 
 /*

src/include/utils/guc.h

@@ -4,7 +4,7 @@
  * External declarations pertaining to backend/utils/misc/guc.c and
  * backend/utils/misc/guc-file.l
  *
- * $Header: /cvsroot/pgsql/src/include/utils/guc.h,v 1.6 2001/03/22 04:01:12 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/include/utils/guc.h,v 1.7 2001/06/07 04:50:57 momjian Exp $
  */
 #ifndef GUC_H
 #define GUC_H
@@ -46,12 +46,13 @@ typedef enum
 } GucContext;
 
 
-void		SetConfigOption(const char *name, const char *value, GucContext context);
+void		SetConfigOption(const char *name, const char *value, GucContext context, bool makeDefault);
 const char *GetConfigOption(const char *name);
 void		ProcessConfigFile(GucContext context);
 void		ResetAllOptions(void);
 void		ParseLongOption(const char *string, char **name, char **value);
-bool		set_config_option(const char *name, const char *value, GucContext context, bool DoIt);
+bool		set_config_option(const char *name, const char *value, GucContext context, bool DoIt, bool makeDefault);
+void		ShowAllGUCConfig(void);
 
 
 extern bool Debug_print_query;