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Add a couple of information functions to support direct checks on whether

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a schema is our own temp schema or another backend's temp schema, and use
these in place of some former kluges in information_schema.  Per my
proposal of yesterday.
This commit is contained in:
Tom Lane
2006-09-14 22:05:06 +00:00
parent 2a20412c45
commit 65ab9f4f24
5 changed files with 67 additions and 16 deletions
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32
doc/src/sgml/func.sgml
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@@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.336 2006/09/10 19:03:57 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.337 2006/09/14 22:05:05 tgl Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@@ -9232,6 +9232,18 @@ select current_date + s.a as dates from generate_series(0,14,7) as s(a);
<entry>port of the local connection</entry>
</row>
<row>
<entry><literal><function>pg_my_temp_schema</function>()</literal></entry>
<entry><type>oid</type></entry>
<entry>OID of session's temporary schema, or 0 if none</entry>
</row>
<row>
<entry><literal><function>pg_is_other_temp_schema</function>(<type>oid</type>)</literal></entry>
<entry><type>boolean</type></entry>
<entry>is schema another session's temporary schema?</entry>
</row>
<row>
<entry><literal><function>pg_postmaster_start_time</function>()</literal></entry>
<entry><type>timestamp with time zone</type></entry>
@@ -9343,6 +9355,24 @@ SET search_path TO <replaceable>schema</> <optional>, <replaceable>schema</>, ..
Unix-domain socket.
</para>
<indexterm zone="functions-info">
<primary>pg_my_temp_schema</primary>
</indexterm>
<indexterm zone="functions-info">
<primary>pg_is_other_temp_schema</primary>
</indexterm>
<para>
<function>pg_my_temp_schema</function> returns the OID of the current
session's temporary schema, or 0 if it has none (because it has not
created any temporary tables).
<function>pg_is_other_temp_schema</function> returns true if the
given OID is the OID of any other session's temporary schema.
(This can be useful, for example, to exclude other sessions' temporary
tables from a catalog display.)
</para>
<indexterm zone="functions-info">
<primary>pg_postmaster_start_time</primary>
</indexterm>