[jira] [Created] (CALCITE-1294) function gatherConstraint in class ReduceExpressionRule throws NullPointerException when both left RexNode and right RexNode are NULL RexLiteral

[chunwei (JIRA)]

chunwei created CALCITE-1294:
--------------------------------

             Summary: function gatherConstraint in class ReduceExpressionRule 
throws NullPointerException when both left RexNode and right RexNode are NULL 
RexLiteral
                 Key: CALCITE-1294
                 URL: https://issues.apache.org/jira/browse/CALCITE-1294
             Project: Calcite
          Issue Type: Bug
          Components: core
            Reporter: chunwei
            Assignee: Julian Hyde


function gatherConstraint in class ReduceExpressionRule throw 
NullPointerException when both left RexNode and right RexNode are NULL 
RexLiteral.

  private static <C extends RexNode> void gatherConstraint(Class<C> clazz,
      RexNode left, RexNode right, Map<RexNode, C> map, Set<RexNode> excludeSet,
      RexBuilder rexBuilder) {
     ......
else {
      if (existedValue instanceof RexLiteral
          && constant instanceof RexLiteral
          && !((RexLiteral) existedValue).getValue()
              .equals(((RexLiteral) constant).getValue())) {
        // we found conflicting values, e.g. left = 10 and left = 20
        map.remove(left);
        excludeSet.add(left);
      }
    }

}



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