Enable bushy and right-hand queries by default.
This commit is contained in:
Bruce Momjian
parent
65ccd1039a
commit
b4e7510e09
@ -413,64 +413,12 @@ SET TIME ZONE { '<REPLACEABLE CLASS="PARAMETER">timezone</REPLACEABLE>' | LOCAL
|
||||
<para>
|
||||
The frontend may be initialized by setting PGGEQO
|
||||
environment variable.
|
||||
|
||||
<variablelist>
|
||||
|
||||
<varlistentry>
|
||||
<term>
|
||||
R_PLANS
|
||||
</term>
|
||||
<listitem>
|
||||
<para>
|
||||
Determines whether right-hand plan evaluation is allowed:
|
||||
</para>
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term>
|
||||
On
|
||||
</term>
|
||||
<listitem>
|
||||
<para>
|
||||
enables right-hand evaluation of plans.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term>
|
||||
Off
|
||||
</term>
|
||||
<listitem>
|
||||
<para>
|
||||
disables right-hand evaluation of plans.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term>
|
||||
DEFAULT
|
||||
</term>
|
||||
<listitem>
|
||||
<para>
|
||||
Equivalent to specifying <command>SET R_PLANS='off'</command>.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</variablelist>
|
||||
</para>
|
||||
<para>
|
||||
It may be useful when joining big relations with
|
||||
small ones. This algorithm is off by default.
|
||||
It's not used by GEQO anyway.
|
||||
</para>
|
||||
<para>
|
||||
The frontend may be initialized by setting the PGRPLANS
|
||||
environment variable.
|
||||
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
<term>
|
||||
@ -527,7 +475,7 @@ SET TIME ZONE { '<REPLACEABLE CLASS="PARAMETER">timezone</REPLACEABLE>' | LOCAL
|
||||
It's not used by GEQO anyway.
|
||||
</para>
|
||||
<para>
|
||||
The frontend may be initialized by setting the PGRPLANS
|
||||
The frontend may be initialized by setting the PGKSQO
|
||||
environment variable.
|
||||
<variablelist>
|
||||
<varlistentry>
|
||||
@ -686,11 +634,6 @@ SET TIME ZONE { '<REPLACEABLE CLASS="PARAMETER">timezone</REPLACEABLE>' | LOCAL
|
||||
--
|
||||
SET GEQO = DEFAULT;
|
||||
</programlisting>
|
||||
<programlisting>
|
||||
--Turn on right-hand evaluation of plans:
|
||||
--
|
||||
SET R_PLANS TO 'on';
|
||||
</programlisting>
|
||||
<programlisting>
|
||||
--set the timezone for Berkeley, California:
|
||||
SET TIME ZONE 'PST8PDT';
|
||||
|
||||
@ -2,7 +2,7 @@
|
||||
* Routines for handling of 'SET var TO',
|
||||
* 'SHOW var' and 'RESET var' statements.
|
||||
*
|
||||
* $Id: variable.c,v 1.18 1998/12/18 09:10:20 vadim Exp $
|
||||
* $Id: variable.c,v 1.19 1999/02/18 06:00:44 momjian Exp $
|
||||
*
|
||||
*/
|
||||
|
||||
@ -36,9 +36,6 @@ static bool parse_cost_heap(const char *);
|
||||
static bool show_cost_index(void);
|
||||
static bool reset_cost_index(void);
|
||||
static bool parse_cost_index(const char *);
|
||||
static bool show_r_plans(void);
|
||||
static bool reset_r_plans(void);
|
||||
static bool parse_r_plans(const char *);
|
||||
static bool reset_geqo(void);
|
||||
static bool show_geqo(void);
|
||||
static bool parse_geqo(const char *);
|
||||
@ -58,7 +55,6 @@ extern Cost _cpu_page_wight_;
|
||||
extern Cost _cpu_index_page_wight_;
|
||||
extern bool _use_geqo_;
|
||||
extern int32 _use_geqo_rels_;
|
||||
extern bool _use_right_sided_plans_;
|
||||
extern bool _use_keyset_query_optimizer;
|
||||
|
||||
/*
|
||||
@ -242,53 +238,6 @@ reset_geqo(void)
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/*
|
||||
*
|
||||
* R_PLANS
|
||||
*
|
||||
*/
|
||||
static bool
|
||||
parse_r_plans(const char *value)
|
||||
{
|
||||
if (value == NULL)
|
||||
{
|
||||
reset_r_plans();
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
if (strcasecmp(value, "on") == 0)
|
||||
_use_right_sided_plans_ = true;
|
||||
else if (strcasecmp(value, "off") == 0)
|
||||
_use_right_sided_plans_ = false;
|
||||
else
|
||||
elog(ERROR, "Bad value for Right-sided Plans (%s)", value);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static bool
|
||||
show_r_plans()
|
||||
{
|
||||
|
||||
if (_use_right_sided_plans_)
|
||||
elog(NOTICE, "Right-sided Plans are ON");
|
||||
else
|
||||
elog(NOTICE, "Right-sided Plans are OFF");
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static bool
|
||||
reset_r_plans()
|
||||
{
|
||||
|
||||
#ifdef USE_RIGHT_SIDED_PLANS
|
||||
_use_right_sided_plans_ = true;
|
||||
#else
|
||||
_use_right_sided_plans_ = false;
|
||||
#endif
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/*
|
||||
*
|
||||
* COST_HEAP
|
||||
@ -659,9 +608,6 @@ struct VariableParsers
|
||||
{
|
||||
"geqo", parse_geqo, show_geqo, reset_geqo
|
||||
},
|
||||
{
|
||||
"r_plans", parse_r_plans, show_r_plans, reset_r_plans
|
||||
},
|
||||
#ifdef MULTIBYTE
|
||||
{
|
||||
"client_encoding", parse_client_encoding, show_client_encoding, reset_client_encoding
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinrels.c,v 1.29 1999/02/18 05:26:19 momjian Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/joinrels.c,v 1.30 1999/02/18 06:00:46 momjian Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -23,14 +23,6 @@
|
||||
#include "optimizer/joininfo.h"
|
||||
#include "optimizer/pathnode.h"
|
||||
|
||||
#ifdef USE_RIGHT_SIDED_PLANS
|
||||
bool _use_right_sided_plans_ = true;
|
||||
|
||||
#else
|
||||
bool _use_right_sided_plans_ = false;
|
||||
|
||||
#endif
|
||||
|
||||
static List *new_joininfo_list(List *joininfo_list, Relids join_relids);
|
||||
static bool nonoverlap_sets(List *s1, List *s2);
|
||||
static bool is_subset(List *s1, List *s2);
|
||||
@ -122,8 +114,7 @@ make_rels_by_clause_joins(Query *root, RelOptInfo *old_rel,
|
||||
join_list = lappend(join_list, joined_rel);
|
||||
|
||||
/* Right-sided plan */
|
||||
if (_use_right_sided_plans_ &&
|
||||
length(old_rel->relids) > 1)
|
||||
if (length(old_rel->relids) > 1)
|
||||
{
|
||||
joined_rel = make_join_rel(
|
||||
get_base_rel(root, lfirsti(unjoined_relids)),
|
||||
@ -133,7 +124,7 @@ make_rels_by_clause_joins(Query *root, RelOptInfo *old_rel,
|
||||
}
|
||||
}
|
||||
|
||||
if (BushyPlanFlag && only_relids == NIL) /* no bushy from geqo */
|
||||
if (only_relids == NIL) /* no bushy from geqo */
|
||||
{
|
||||
List *r;
|
||||
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.102 1999/02/18 05:26:24 momjian Exp $
|
||||
* $Header: /cvsroot/pgsql/src/backend/tcop/postgres.c,v 1.103 1999/02/18 06:00:49 momjian Exp $
|
||||
*
|
||||
* NOTES
|
||||
* this is the "main" module of the postgres backend and
|
||||
@ -907,7 +907,7 @@ usage(char *progname)
|
||||
fprintf(stderr,
|
||||
"Usage: %s [options] [dbname]\n", progname);
|
||||
#ifdef USE_ASSERT_CHECKING
|
||||
fprintf(stderr, " A: enable/disable assert checking\n");
|
||||
fprintf(stderr, "\t-A enable/disable assert checking\n");
|
||||
#endif
|
||||
fprintf(stderr, "\t-B buffers\tset number of buffers in buffer pool\n");
|
||||
fprintf(stderr, "\t-C \t\tsupress version info\n");
|
||||
@ -1017,7 +1017,7 @@ PostgresMain(int argc, char *argv[], int real_argc, char *real_argv[])
|
||||
optind = 1; /* reset after postmaster usage */
|
||||
|
||||
while ((flag = getopt(argc, argv,
|
||||
"A:B:bCD:d:Eef:iK:Lm:MNo:P:pQS:st:v:x:FW:"))
|
||||
"A:B:CD:d:Eef:iK:Lm:MNo:P:pQS:st:v:x:FW:"))
|
||||
!= EOF)
|
||||
switch (flag)
|
||||
{
|
||||
@ -1522,7 +1522,7 @@ PostgresMain(int argc, char *argv[], int real_argc, char *real_argv[])
|
||||
if (!IsUnderPostmaster)
|
||||
{
|
||||
puts("\nPOSTGRES backend interactive interface ");
|
||||
puts("$Revision: 1.102 $ $Date: 1999/02/18 05:26:24 $\n");
|
||||
puts("$Revision: 1.103 $ $Date: 1999/02/18 06:00:49 $\n");
|
||||
}
|
||||
|
||||
/* ----------------
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.92 1999/02/13 23:22:40 momjian Exp $
|
||||
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-connect.c,v 1.93 1999/02/18 06:01:00 momjian Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
@ -136,9 +136,6 @@ static struct EnvironmentOptions
|
||||
{
|
||||
"PGCOSTINDEX", "cost_index"
|
||||
},
|
||||
{
|
||||
"PGRPLANS", "r_plans"
|
||||
},
|
||||
{
|
||||
"PGGEQO", "geqo"
|
||||
},
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
.\" This is -*-nroff-*-
|
||||
.\" XXX standard disclaimer belongs here....
|
||||
.\" $Header: /cvsroot/pgsql/src/man/Attic/set.l,v 1.14 1999/02/14 04:57:02 momjian Exp $
|
||||
.\" $Header: /cvsroot/pgsql/src/man/Attic/set.l,v 1.15 1999/02/18 06:01:11 momjian Exp $
|
||||
.TH SET SQL 05/14/97 PostgreSQL PostgreSQL
|
||||
.SH NAME
|
||||
set - set run-time parameters for session
|
||||
@ -60,24 +60,6 @@ for more information.
|
||||
on=10 - use for statements with 10 or more tables
|
||||
off - do not use the genetic optimizer
|
||||
.fi
|
||||
.PP
|
||||
.IR R_PLANS
|
||||
enables or disables right-hand evaluation of plans. It may be useful
|
||||
when joining big relations with small ones. This algorithm is
|
||||
.IR off
|
||||
by default. It's not used by GEQO anyway.
|
||||
|
||||
.if n .ta 5 +15 +40
|
||||
.if t .ta 0.5i +1.5i +3.0i
|
||||
.in 0
|
||||
.nf
|
||||
.ce 1
|
||||
\fBR_PLANS Values\fR
|
||||
|
||||
on - turn right-hand plan evaluation 'on'
|
||||
off - do not use right-hand plan evaluation
|
||||
.fi
|
||||
|
||||
.PP
|
||||
.IR QUERY_LIMIT
|
||||
restricts the number of rows returned by a query.
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user