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doc: Add more compatibility information for triggers

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Louis-Claude Canon and Josh Kupershmidt
This commit is contained in:
Peter Eisentraut 2013-02-23 00:28:33 -05:00
parent 4f36292669
commit 8e8d0f7e80
1 changed files with 12 additions and 1 deletions
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13
doc/src/sgml/ref/create_trigger.sgml
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@ -484,7 +484,8 @@ CREATE TRIGGER view_insert
<para>
The <command>CREATE TRIGGER</command> statement in
<productname>PostgreSQL</productname> implements a subset of the
<acronym>SQL</> standard. The following functionality is currently missing:
<acronym>SQL</> standard. The following functionalities are currently
missing:
<itemizedlist>
<listitem>
@ -500,6 +501,16 @@ CREATE TRIGGER view_insert
</para>
</listitem>
<listitem>
<para>
<productname>PostgreSQL</productname> does not allow the old and new
tables to be referenced in statement-level triggers, i.e., the tables
that contain all the old and/or new rows, which are referred to by the
<literal>OLD TABLE</literal> and <literal>NEW TABLE</literal> clauses in
the <acronym>SQL</> standard.
</para>
</listitem>
<listitem>
<para><productname>PostgreSQL</productname> only allows the execution
of a user-defined function for the triggered action. The standard