[GitHub] incubator-hawq pull request #1349: HAWQ-1598. Vectorized Scan Node Framework...

[wengyanqing]

Github user wengyanqing commented on a diff in the pull request:

    https://github.com/apache/incubator-hawq/pull/1349#discussion_r177942413
  
    --- Diff: contrib/vexecutor/vexecutor.c ---
    @@ -66,12 +75,47 @@ _PG_fini(void)
        vmthd.ExecEndNode_Hook = NULL;
     }
     
    -static PlanState* VExecInitNode(PlanState *node,EState *eState,int eflags)
    +static void backportTupleDescriptor(PlanState* ps,TupleDesc td)
    --- End diff --
    
    What's the purpose of this function ? Would you give the comment ?


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