miklosgergely commented on a change in pull request #544: HIVE-16924 Support
distinct in presence of Group By
URL: https://github.com/apache/hive/pull/544#discussion_r259958209
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File path: ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
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@@ -4230,6 +4229,34 @@ public static long unsetBit(long bitmap, int bitIdx) {
}
}
+ protected boolean isGroupBy(ASTNode expr) {
+ boolean isGroupBy = false;
+ if (expr.getParent() != null && expr.getParent() instanceof Node)
+ for (Node sibling : ((Node)expr.getParent()).getChildren()) {
+ isGroupBy |= sibling instanceof ASTNode && ((ASTNode)sibling).getType()
== HiveParser.TOK_GROUPBY;
+ }
+
+ return isGroupBy;
+ }
+
+ protected boolean isSelectDistinct(ASTNode expr) {
+ return expr.getType() == HiveParser.TOK_SELECTDI;
+ }
+
+ protected boolean isAggregateInSelect(Node node, Collection<ASTNode>
aggregateFunction) {
+ if (node.getChildren() == null) {
+ return false;
+ }
+
+ for (Node child : node.getChildren()) {
Review comment:
I doubt there is any. The above example is not valid, it says:
Unsupported SubQuery Expression Invalid subquery. Subquery with DISTINCT
clause is not supported!
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