[CALCITE-1397] ClassCastException in FilterReduceExpressionsRule

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.9.0
• Fix Version/s: 1.10.0
• Component/s: core
• Assignee: Jesús Camacho Rodríguez
• Reporter: Jesús Camacho Rodríguez
• Created: 28/Sep/16 14:49
• Updated: 27/Feb/24 22:23
• Resolved: 29/Sep/16 11:04

Description

L184 in ReduceExpressionsRule.

...
        if (newConditionExp instanceof RexCall) {
          RexCall rexCall = (RexCall) newConditionExp;
          boolean reverse = rexCall.getKind() == SqlKind.NOT;
          if (reverse) {
            rexCall = (RexCall) rexCall.getOperands().get(0);
          }
          reduceNotNullableFilter(call, filter, rexCall, reverse);
        }
...

When we take the NOT input, we do not consider that it might not be a RexCall, which may lead to the ClassCastException.