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Fill in information schema column for trigger WHEN condition

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This commit is contained in:
Peter Eisentraut
2009-12-30 22:48:10 +00:00
parent e6df063cf2
commit 3c505ef577
2 changed files with 13 additions and 4 deletions
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8
doc/src/sgml/information_schema.sgml
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@@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/information_schema.sgml,v 1.42 2009/12/05 21:31:05 petere Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/information_schema.sgml,v 1.43 2009/12/30 22:48:10 petere Exp $ -->
<chapter id="information-schema"> <chapter id="information-schema">
<title>The Information Schema</title> <title>The Information Schema</title>
@@ -4875,7 +4875,11 @@ ORDER BY c.ordinal_position;
<row> <row>
<entry><literal>action_condition</literal></entry> <entry><literal>action_condition</literal></entry>
<entry><type>character_data</type></entry> <entry><type>character_data</type></entry>
<entry>Applies to a feature not available in <productname>PostgreSQL</></entry> <entry>
<literal>WHEN</literal> condition of the trigger, null if none
(also null if the table is not owned by a currently enabled
role)
</entry>
</row> </row>
<row> <row>

9
src/backend/catalog/information_schema.sql
View File

@@ -4,7 +4,7 @@
* *
* Copyright (c) 2003-2009, PostgreSQL Global Development Group * Copyright (c) 2003-2009, PostgreSQL Global Development Group
* *
* $PostgreSQL: pgsql/src/backend/catalog/information_schema.sql,v 1.60 2009/12/07 05:22:21 tgl Exp $ * $PostgreSQL: pgsql/src/backend/catalog/information_schema.sql,v 1.61 2009/12/30 22:48:10 petere Exp $
*/ */
/* /*
@@ -1909,7 +1909,12 @@ CREATE VIEW triggers AS
CAST(n.nspname AS sql_identifier) AS event_object_schema, CAST(n.nspname AS sql_identifier) AS event_object_schema,
CAST(c.relname AS sql_identifier) AS event_object_table, CAST(c.relname AS sql_identifier) AS event_object_table,
CAST(null AS cardinal_number) AS action_order, CAST(null AS cardinal_number) AS action_order,
CAST(null AS character_data) AS action_condition, -- XXX strange hacks follow
CAST(
CASE WHEN pg_has_role(c.relowner, 'USAGE')
THEN (SELECT m[1] FROM regexp_matches(pg_get_triggerdef(t.oid), E'.{35,} WHEN \\((.+)\\) EXECUTE PROCEDURE') AS rm(m) LIMIT 1)
ELSE null END
AS character_data) AS action_condition,
CAST( CAST(
substring(pg_get_triggerdef(t.oid) from substring(pg_get_triggerdef(t.oid) from
position('EXECUTE PROCEDURE' in substring(pg_get_triggerdef(t.oid) from 48)) + 47) position('EXECUTE PROCEDURE' in substring(pg_get_triggerdef(t.oid) from 48)) + 47)