diff --git a/db/sql.php b/db/sql.php
index d3d79dd1..692f3938 100644
--- a/db/sql.php
+++ b/db/sql.php
@@ -375,6 +375,7 @@ function schema($table,$fields=NULL,$ttl=0) {
 							('AND K.TABLE_CATALOG=T.TABLE_CATALOG '):'').
 				'WHERE '.
 					'C.TABLE_NAME='.$this->quote($table).
+					(empty($schema) ?: ' AND C.TABLE_SCHEMA='.$this->quote($schema)).
 					($this->dbname?
 						(' AND C.TABLE_CATALOG='.
 							$this->quote($this->dbname)):''),