kasakrisz commented on a change in pull request #1811:
URL: https://github.com/apache/hive/pull/1811#discussion_r564597536
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File path: ql/src/java/org/apache/hadoop/hive/ql/ppd/OpProcFactory.java
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@@ -728,6 +769,134 @@ private void applyFilterTransitivity(JoinOperator join,
int targetPos, OpWalkerI
}
}
}
+
+ private void extractColumnExprNodes(ExprNodeDesc exprNodeDesc,
List<ExprNodeColumnDesc> result) {
+ if (exprNodeDesc instanceof ExprNodeColumnDesc) {
+ result.add((ExprNodeColumnDesc) exprNodeDesc);
+ return;
+ }
+ if (exprNodeDesc instanceof ExprNodeGenericFuncDesc) {
+ for (ExprNodeDesc child : exprNodeDesc.getChildren()) {
+ extractColumnExprNodes(child, result);
+ }
+ }
+ }
+
+ private ExprNodeDesc replaceColumnExprNodes(ExprNodeDesc exprNodeDesc,
Map<ExprNodeDesc, ExprNodeDesc> replaceMap) {
+ if (exprNodeDesc instanceof ExprNodeColumnDesc) {
+ return replaceMap.getOrDefault(exprNodeDesc, exprNodeDesc);
+ }
+ if (exprNodeDesc instanceof ExprNodeGenericFuncDesc) {
+ ExprNodeGenericFuncDesc exprNodeGenericFuncDesc =
(ExprNodeGenericFuncDesc) exprNodeDesc.clone();
+ List<ExprNodeDesc> replacedChildren = new
ArrayList<>(exprNodeDesc.getChildren().size());
+ for (ExprNodeDesc child : exprNodeDesc.getChildren()) {
+ replacedChildren.add(replaceColumnExprNodes(child, replaceMap));
+ }
+ exprNodeGenericFuncDesc.setChildren(replacedChildren);
+ return exprNodeGenericFuncDesc;
+ }
+
+ return exprNodeDesc;
+ }
+
+ private Map<ExprNodeDesc, String> walk(Operator<?> operator,
List<ExprNodeColumnDesc> exprNodeDescList) {
Review comment:
changed to `searchForEqualities`
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