Github user sandhyasun commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/826#discussion_r87479021
--- Diff: core/sql/optimizer/BindRelExpr.cpp ---
@@ -2436,6 +2437,32 @@ Scan *RelExpr::getLeftmostScanNode() const
return (Scan *)result;
}
+
+
+Join * RelExpr::getLeftJoinChild() const
+{
+ RelExpr *result = (RelExpr *)this;
+
+ while(result)
+ {
+ if (result->getOperatorType() == REL_LEFT_JOIN) break;
+ result = result->child(0);
--- End diff --
This is cloned from the existing method getLeftMostScanNode(). They can
atmost return NULL which is ok.
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