Fix introspection query for planetscaledb
ERROR 1105 (HY000): vtgate: <...> symbol referenced_column_name not found
@@ -446,7 +446,7 @@ impl SqlSchemaDescriber {
WHERE
kcu.table_schema = ?
AND rc.constraint_schema = ?
- AND referenced_column_name IS NOT NULL
+ AND kcu.referenced_column_name IS NOT NULL
ORDER BY ordinal_position
";
