Github user zellerh commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/826#discussion_r87304583
--- 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);
+ }
+ return (Join *)result;
+}
+
+RelSequence* RelExpr::getOlapChild() const
--- End diff --
Might be nice to make this a more generic method and pass the operator type
in as a parameter, so we don't have two new methods on RelExpr that have only
very limited use? Sorry, that would mean you have to do the dirty cast in the
caller.
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