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Support SQL-compliant triggers on columns, ie fire only if certain columns

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are named in the UPDATE's SET list.

Note: the schema of pg_trigger has not actually changed; we've just started
to use a column that was there all along.  catversion bumped anyway so that
this commit is included in the history of potentially interesting changes
to system catalog contents.

Itagaki Takahiro
This commit is contained in:
Tom Lane
2009-10-14 22:14:25 +00:00
parent be922e8555
commit b2734a0d79
17 changed files with 433 additions and 183 deletions
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19
src/backend/utils/adt/ruleutils.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.309 2009/10/10 01:43:49 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.310 2009/10/14 22:14:23 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -543,6 +543,23 @@ pg_get_triggerdef_worker(Oid trigid, bool pretty)
appendStringInfo(&buf, " OR UPDATE");
else
appendStringInfo(&buf, " UPDATE");
/* tgattr is first var-width field, so OK to access directly */
if (trigrec->tgattr.dim1 > 0)
{
int i;
appendStringInfoString(&buf, " OF ");
for (i = 0; i < trigrec->tgattr.dim1; i++)
{
char *attname;
if (i > 0)
appendStringInfoString(&buf, ", ");
attname = get_relid_attribute_name(trigrec->tgrelid,
trigrec->tgattr.values[i]);
appendStringInfoString(&buf, quote_identifier(attname));
}
}
}
if (TRIGGER_FOR_TRUNCATE(trigrec->tgtype))
{