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From jianqiao <...@git.apache.org>
Subject [GitHub] incubator-quickstep pull request #240: Fix the issues with the common subexp...
Date Mon, 24 Apr 2017 21:54:36 GMT
Github user jianqiao commented on a diff in the pull request:

    https://github.com/apache/incubator-quickstep/pull/240#discussion_r113066280
  
    --- Diff: query_optimizer/rules/ExtractCommonSubexpression.hpp ---
    @@ -111,7 +111,7 @@ class ExtractCommonSubexpression : public Rule<physical::Physical>
{
       bool visitAndCount(
           const expressions::ExpressionPtr &expression,
           ScalarCounter *counter,
    -      ScalarHashable *hashable);
    +      ScalarHashable *hashable) const;
    --- End diff --
    
    These three methods involve the invoking of `optimizer_context_->nextExprId()` which
modifies  the context (symbol id counter) of `optimizer_context_`.


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