database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-27 12:41:57 +03:00
Code Activity

Enable bushy and right-hand queries by default.

Browse Source
This commit is contained in:
Bruce Momjian
1999-02-18 06:01:11 +00:00
parent 65ccd1039a
commit b4e7510e09
6 changed files with 12 additions and 153 deletions
Download Patch File Download Diff File Expand all files Collapse all files

61
doc/src/sgml/ref/set.sgml
View File

@ -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';