If we're going to use a SQL function for this, at least make it schema-proof.

Author: tglsfdc

src/include/catalog/pg_proc.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.525 2008/11/12 13:09:28 petere Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.526 2008/11/12 13:38:04 tgl Exp $
  *
  * NOTES
  *	  The script catalog/genbki.sh reads this file and generates .bki
@@ -998,7 +998,7 @@ DATA(insert OID = 2092 (  array_upper	   PGNSP PGUID 12 1 0 0 f f t f i 2 23 "22
 DESCR("array upper dimension");
 DATA(insert OID = 2176 (  array_length     PGNSP PGUID 12 1 0 0 f f t f i 2 23 "2277 23" _null_ _null_ _null_ array_length _null_ _null_ _null_ ));
 DESCR("array length");
-DATA(insert OID = 2179 (  cardinality      PGNSP PGUID 14 1 0 0 f f t f i 1 23 "2277" _null_ _null_ _null_ "select array_length($1, 1)" _null_ _null_ _null_ ));
+DATA(insert OID = 2179 (  cardinality      PGNSP PGUID 14 1 0 0 f f t f i 1 23 "2277" _null_ _null_ _null_ "select pg_catalog.array_length($1, 1)" _null_ _null_ _null_ ));
 DESCR("array length");
 DATA(insert OID = 378 (  array_append	   PGNSP PGUID 12 1 0 0 f f f f i 2 2277 "2277 2283" _null_ _null_ _null_ array_push _null_ _null_ _null_ ));
 DESCR("append element onto end of array");