deal where  is not null
@@ -150,6 +150,9 @@ public class RdbAsyncSideInfo extends SideInfo {
return quoteIdentifier(info.getFieldName()) + " != " + info.getCondition();
case "BETWEEN":
return quoteIdentifier(info.getFieldName()) + " BETWEEN " + info.getCondition();
+ case "IS_NOT_NULL":
+ case "IS_NULL":
+ return quoteIdentifier(info.getFieldName()) + " " + info.getOperatorName();
default:
return quoteIdentifier(info.getFieldName()) + " " + info.getOperatorName() + " " + info.getCondition();
}
