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  1. Calcite
  2. CALCITE-3492

RexUtil.simplifyOrs() throws exception if terms has 1 RexNode

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 1.22.0
    • core

    Description

      This is a regression caused by the refactoring in 1.20.0.

      When terms has only 1 element, it will throw an exception. We discovered the issue when trying to upgrade Calcite.

         public static RexNode simplifyOrs(RexBuilder rexBuilder,
             List<RexNode> terms) {
           return new RexSimplify(rexBuilder, RelOptPredicateList.EMPTY, EXECUTOR)
              .simplifyUnknownAs(rexBuilder.makeCall(SqlStdOperatorTable.OR, terms),
                   RexUnknownAs.UNKNOWN);
         }
      

      We can't assume the terms always has more than 1 element. Although this method is deprecated, I think we need to correct the regression. Maybe we don't need a test case, given it is a deprecated method.

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              Unassigned Unassigned
              hyuan Haisheng Yuan
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