diff options
Diffstat (limited to 'src/backend/utils/adt/ruleutils.c')
| -rw-r--r-- | src/backend/utils/adt/ruleutils.c | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c index 1040ff3e238..27259044c19 100644 --- a/src/backend/utils/adt/ruleutils.c +++ b/src/backend/utils/adt/ruleutils.c @@ -3,7 +3,7 @@ * back to source text * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.141 2003/05/28 16:03:59 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.142 2003/06/25 03:56:30 momjian Exp $ * * This software is copyrighted by Jan Wieck - Hamburg. * @@ -894,6 +894,10 @@ pg_get_constraintdef(PG_FUNCTION_ARGS) { Datum val; bool isnull; + char *conbin; + char *consrc; + Node *expr; + List *context; /* Start off the constraint definition */ /* The consrc for CHECK constraints always seems to be @@ -901,14 +905,39 @@ pg_get_constraintdef(PG_FUNCTION_ARGS) appendStringInfo(&buf, "CHECK "); /* Fetch constraint source */ - val = heap_getattr(tup, Anum_pg_constraint_consrc, + val = heap_getattr(tup, Anum_pg_constraint_conbin, RelationGetDescr(conDesc), &isnull); if (isnull) elog(ERROR, "pg_get_constraintdef: Null consrc for constraint %u", constraintId); + conbin = DatumGetCString(DirectFunctionCall1(textout, val)); + expr = stringToNode(conbin); + + /* + * If top level is a List, assume it is an implicit-AND structure, and + * convert to explicit AND. This is needed for partial index + * predicates. + */ + if (expr && IsA(expr, List)) + expr = (Node *) make_ands_explicit((List *) expr); + + if (conForm->conrelid != InvalidOid) + /* It's a Relation */ + context = deparse_context_for(get_rel_name(conForm->conrelid), + conForm->conrelid); + else + /* + * Since VARNOs aren't allowed in domain constraints, relation context + * isn't required as anything other than a shell. + */ + context = deparse_context_for(get_typname(conForm->contypid), + InvalidOid); + + consrc = deparse_expression(expr, context, false, false); + /* Append the constraint source */ - appendStringInfoString(&buf, DatumGetCString(DirectFunctionCall1(textout, val))); + appendStringInfoString(&buf, consrc); break; } |