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From sudheeshkatkam <...@git.apache.org>
Subject [GitHub] drill pull request: Drill 4372 review
Date Wed, 16 Mar 2016 23:04:52 GMT
Github user sudheeshkatkam commented on a diff in the pull request:

    https://github.com/apache/drill/pull/397#discussion_r56431255
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/DrillAvgVarianceConvertlet.java
---
    @@ -40,7 +43,16 @@
     public class DrillAvgVarianceConvertlet implements SqlRexConvertlet {
     
       private final SqlAvgAggFunction.Subtype subtype;
    -  private static final DrillSqlOperator CastHighOp = new DrillSqlOperator("CastHigh",
1, false);
    +  private static final DrillSqlOperator CastHighOp = new DrillSqlOperator("CastHigh",
1, false,
    +      new SqlReturnTypeInference() {
    +        @Override
    +        public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
    +          return TypeInferenceUtils.createCalciteTypeWithNullability(
    +              opBinding.getTypeFactory(),
    +              SqlTypeName.ANY,
    --- End diff --
    
    (1) Can the return type be inferred based on TypeCastRules?
    (2) Are *Convertlet part of validation phase? If not, what guarantees that return type
at validation and at execution are same?


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