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From hsuanyi <...@git.apache.org>
Subject [GitHub] drill pull request: Drill 4372 for review
Date Fri, 19 Feb 2016 23:22:54 GMT
Github user hsuanyi commented on a diff in the pull request:

    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/expr/fn/impl/StringFunctions.java
    @@ -216,6 +217,20 @@ public void eval() {
       @FunctionTemplate(names = {"char_length", "character_length", "length"}, scope = FunctionScope.SIMPLE,
nulls = NullHandling.NULL_IF_NULL)
    +  public static class DummyCharLength implements DrillSimpleFunc {
    --- End diff --
    As you can see, there are a bunch of dummy functions added in. 
    As here:
    If there is no a dummy, this line cannot find a DrillFuncHolder which matches the given
    Their bodies are empty and it is fine because later in DrillOptiq, the functions which
will actually be used will be chosen.

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