vineetgarg02 commented on a change in pull request #783: HIVE-22232
URL: https://github.com/apache/hive/pull/783#discussion_r328282487
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/translator/ASTConverter.java
##########
@@ -160,17 +160,27 @@ private ASTNode convert() throws
CalciteSemanticException {
}
HiveAggregate hiveAgg = (HiveAggregate) groupBy;
- for (int pos : hiveAgg.getAggregateColumnsOrder()) {
- RexInputRef iRef = new RexInputRef(groupBy.getGroupSet().nth(pos),
-
groupBy.getCluster().getTypeFactory().createSqlType(SqlTypeName.ANY));
- b.add(iRef.accept(new RexVisitor(schema, false,
root.getCluster().getRexBuilder())));
- }
- for (int pos = 0; pos < groupBy.getGroupCount(); pos++) {
- if (!hiveAgg.getAggregateColumnsOrder().contains(pos)) {
+ if (hiveAgg.getAggregateColumnsOrder() != null) {
+ // Aggregation columns may have been sorted in specific order
+ for (int pos : hiveAgg.getAggregateColumnsOrder()) {
RexInputRef iRef = new RexInputRef(groupBy.getGroupSet().nth(pos),
groupBy.getCluster().getTypeFactory().createSqlType(SqlTypeName.ANY));
b.add(iRef.accept(new RexVisitor(schema, false,
root.getCluster().getRexBuilder())));
}
+ for (int pos = 0; pos < groupBy.getGroupCount(); pos++) {
+ if (!hiveAgg.getAggregateColumnsOrder().contains(pos)) {
Review comment:
Can we change this to `hiveAgg.getAggregateColumnsOrder == null ||
!hiveAgg.getAggregateColumnsOrder().contains(pos`) ?. Take this for loop off if
condition and get rid of the repetitive else block
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