index 10ee725b30ab5bc46a2d5999001eb67a2ce44d80..205ffd7540b123e27fbe46e7435336bac8f621ec 100644 (file)
* back to source text
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.134 2003年02月03日 21:15:44 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.135 2003年02月13日 05:10:39 momjian Exp $
*
* This software is copyrighted by Jan Wieck - Hamburg.
*
*
* Returns the definition for the constraint, ie, everything that needs to
* appear after "ALTER TABLE ... ADD CONSTRAINT <constraintname>".
- *
- * XXX The present implementation only works for foreign-key constraints, but
- * it could and should handle anything pg_constraint stores.
*/
Datum
pg_get_constraintdef(PG_FUNCTION_ARGS)
break;
}
+ case CONSTRAINT_PRIMARY:
+ case CONSTRAINT_UNIQUE:
+ {
+ Datum val;
+ bool isnull;
- /*
- * XXX Add more code here for other contypes
- */
+ /* Start off the constraint definition */
+ if (conForm->contype == CONSTRAINT_PRIMARY)
+ appendStringInfo(&buf, "PRIMARY KEY (");
+ else
+ appendStringInfo(&buf, "UNIQUE (");
+
+ /* Fetch and build target column list */
+ val = heap_getattr(tup, Anum_pg_constraint_conkey,
+ RelationGetDescr(conDesc), &isnull);
+ if (isnull)
+ elog(ERROR, "pg_get_constraintdef: Null conkey for constraint %u",
+ constraintId);
+
+ decompile_column_index_array(val, conForm->conrelid, &buf);
+
+ appendStringInfo(&buf, ")");
+
+ break;
+ }
+ case CONSTRAINT_CHECK:
+ {
+ Datum val;
+ bool isnull;
+
+ /* Start off the constraint definition */
+ /* The consrc for CHECK constraints always seems to be
+ bracketed, so we don't add extra brackets here. */
+ appendStringInfo(&buf, "CHECK ");
+
+ /* Fetch constraint source */
+ val = heap_getattr(tup, Anum_pg_constraint_consrc,
+ RelationGetDescr(conDesc), &isnull);
+ if (isnull)
+ elog(ERROR, "pg_get_constraintdef: Null consrc for constraint %u",
+ constraintId);
+
+ /* Append the constraint source */
+ appendStringInfo(&buf, DatumGetCString(DirectFunctionCall1(textout, val)));
+
+ break;
+ }
default:
elog(ERROR, "pg_get_constraintdef: unsupported constraint type '%c'",
conForm->contype);