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Postgres FD Implementation
Commit b4e7510e authored by Bruce Momjian's avatar Bruce Momjian
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Enable bushy and right-hand queries by default.

parent 65ccd103
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Showing with 12 additions and 153 deletions
doc/src/sgml/ref/set.sgml
View file @ b4e7510e
......@@ -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';
......
src/backend/commands/variable.c
View file @ b4e7510e
......@@ -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
......
src/backend/optimizer/path/joinrels.c
View file @ b4e7510e
......@@ -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;
......
src/backend/tcop/postgres.c
View file @ b4e7510e
......@@ -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");
}
/* ----------------
......
src/interfaces/libpq/fe-connect.c
View file @ b4e7510e
......@@ -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"
},
......
src/man/set.l
View file @ b4e7510e
.\" 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.
......
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