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New QUERY_LIMIT set command.

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This commit is contained in:
Bruce Momjian
1998-10-14 05:10:12 +00:00
parent 39f2ec55d7
commit 8cec4cf91b
6 changed files with 161 additions and 18 deletions
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103
src/backend/commands/variable.c
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@ -2,7 +2,7 @@
* Routines for handling of 'SET var TO',
* 'SHOW var' and 'RESET var' statements.
*
* $Id: variable.c,v 1.15 1998/10/08 23:50:28 tgl Exp $
* $Id: variable.c,v 1.16 1998/10/14 05:09:58 momjian Exp $
*
*/
@ -18,6 +18,10 @@
#ifdef MULTIBYTE
#include "mb/pg_wchar.h"
#endif
#ifdef QUERY_LIMIT
#include "executor/executor.h"
#include "executor/execdefs.h"
#endif
static bool show_date(void);
static bool reset_date(void);
@ -40,6 +44,11 @@ static bool parse_geqo(const char *);
static bool show_ksqo(void);
static bool reset_ksqo(void);
static bool parse_ksqo(const char *);
#ifdef QUERY_LIMIT
static bool show_query_limit(void);
static bool reset_query_limit(void);
static bool parse_query_limit(const char *);
#endif
extern Cost _cpu_page_wight_;
extern Cost _cpu_index_page_wight_;
@ -48,7 +57,11 @@ extern int32 _use_geqo_rels_;
extern bool _use_right_sided_plans_;
extern bool _use_keyset_query_optimizer;
/*-----------------------------------------------------------------------*/
/*
*
* Get_Token
*
*/
static const char *
get_token(char **tok, char **val, const char *str)
{
@ -149,7 +162,11 @@ get_token(char **tok, char **val, const char *str)
return str;
}
/*-----------------------------------------------------------------------*/
/*
*
* GEQO
*
*/
static bool
parse_geqo(const char *value)
{
@ -221,6 +238,11 @@ reset_geqo(void)
return TRUE;
}
/*
*
* R_PLANS
*
*/
static bool
parse_r_plans(const char *value)
{
@ -240,7 +262,6 @@ parse_r_plans(const char *value)
return TRUE;
}
/*-----------------------------------------------------------------------*/
static bool
show_r_plans()
{
@ -264,7 +285,11 @@ reset_r_plans()
return TRUE;
}
/*-----------------------------------------------------------------------*/
/*
*
* COST_HEAP
*
*/
static bool
parse_cost_heap(const char *value)
{
@ -297,7 +322,11 @@ reset_cost_heap()
return TRUE;
}
/*-----------------------------------------------------------------------*/
/*
*
* COST_INDEX
*
*/
static bool
parse_cost_index(const char *value)
{
@ -330,7 +359,11 @@ reset_cost_index()
return TRUE;
}
/*-----------------------------------------------------------------------*/
/*
*
* DATE_STYLE
*
*/
static bool
parse_date(const char *value)
{
@ -448,6 +481,11 @@ static char *defaultTZ = NULL;
static char TZvalue[64];
static char tzbuf[64];
/*
*
* TIMEZONE
*
*/
/* parse_timezone()
* Handle SET TIME ZONE...
* Try to save existing TZ environment variable for later use in RESET TIME ZONE.
@ -545,7 +583,53 @@ reset_timezone()
return TRUE;
} /* reset_timezone() */
/*
*
* Query_limit
*
*/
#ifdef QUERY_LIMIT
static bool
parse_query_limit(const char *value)
{
int32 limit;
if (value == NULL) {
reset_query_limit();
return(TRUE);
}
limit = pg_atoi(value, sizeof(int32), '\0');
if (limit <= -1) {
elog(ERROR, "Bad value for # of query limit (%s)", value);
}
ExecutorLimit(limit);
return(TRUE);
}
static bool
show_query_limit(void)
{
int limit;
limit = ExecutorGetLimit();
if (limit == ALL_TUPLES) {
elog(NOTICE, "No query limit is set");
} else {
elog(NOTICE, "query limit is %d",limit);
}
return(TRUE);
}
static bool
reset_query_limit(void)
{
ExecutorLimit(ALL_TUPLES);
return(TRUE);
}
#endif
/*-----------------------------------------------------------------------*/
struct VariableParsers
{
const char *name;
@ -584,6 +668,11 @@ struct VariableParsers
{
"ksqo", parse_ksqo, show_ksqo, reset_ksqo
},
#ifdef QUERY_LIMIT
{
"query_limit", parse_query_limit, show_query_limit, reset_query_limit
},
#endif
{
NULL, NULL, NULL, NULL
}