mihaibudiu commented on code in PR #4201:
URL: https://github.com/apache/calcite/pull/4201#discussion_r2012526900
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core/src/main/java/org/apache/calcite/rel/rules/ProjectAggregateMergeRule.java:
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@@ -154,9 +156,22 @@ && kindCount(project.getProjects(), SqlKind.CASE) == 0) {
builder.push(aggregate.getInput());
builder.aggregate(
builder.groupKey(aggregate.getGroupSet(), aggregate.groupSets),
aggCallList);
- builder.project(
- RexPermuteInputsShuttle.of(mapping).visitList(projects2),
- project.getRowType().getFieldNames());
+ // If the output type of Aggregate does not match the input type required
by original Project,
+ // CAST needs to be added
+ List<RexNode> rexInputRefs =
RexPermuteInputsShuttle.of(mapping).visitList(projects2);
Review Comment:
in other words, what you have done is the only thing reasonable
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