diff -cpr postgresql-8.1.5-orig/src/backend/catalog/heap.c postgresql-8.1.5/src/backend/catalog/heap.c
*** postgresql-8.1.5-orig/src/backend/catalog/heap.c	2006-04-24 10:40:39.000000000 +0900
--- postgresql-8.1.5/src/backend/catalog/heap.c	2006-10-23 16:50:22.000000000 +0900
*************** AddRelationRawConstraints(Relation rel,
*** 1525,1530 ****
--- 1525,1535 ----
  			continue;
  		Assert(cdef->cooked_expr == NULL);
  
+ 		if (numchecks == 0x7FFF)
+ 			ereport(ERROR,
+ 					(errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
+ 			  errmsg("cannot have more than 2^15-1 checks in a table")));
+ 
  		/*
  		 * Transform raw parsetree to executable expression.
  		 */