yashmayya commented on code in PR #14233:
URL: https://github.com/apache/pinot/pull/14233#discussion_r1804044667
##########
pinot-query-planner/src/main/java/org/apache/pinot/calcite/rel/rules/PinotWindowExchangeNodeInsertRule.java:
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@@ -209,23 +244,37 @@ private void validateWindows(Window window) {
}
private void validateWindowAggCallsSupported(Window.Group windowGroup) {
- for (int i = 0; i < windowGroup.aggCalls.size(); i++) {
- Window.RexWinAggCall aggCall = windowGroup.aggCalls.get(i);
+ for (Window.RexWinAggCall aggCall : windowGroup.aggCalls) {
SqlKind aggKind = aggCall.getKind();
Preconditions.checkState(SUPPORTED_WINDOW_FUNCTION_KIND.contains(aggKind),
String.format("Unsupported Window function kind: %s. Only
aggregation functions are supported!", aggKind));
}
}
private void validateWindowFrames(Window.Group windowGroup) {
- // Has ROWS only aggregation call kind (e.g. ROW_NUMBER)?
- boolean isRowsOnlyTypeAggregateCall =
isRowsOnlyAggregationCallType(windowGroup.aggCalls);
+ // Has rank based aggregation call kind (e.g. ROW_NUMBER, RANK, DENSE_RANK)
+ boolean hasRankBasedAgg = hasRankBasedAgg(windowGroup.aggCalls);
+
+ // FOLLOWING lower bound or PRECEDING upper bound is not allowed, and
won't reach here
Review Comment:
`UNBOUNDED PRECEDING` is not allowed for upper frame boundary and `UNBOUNDED
FOLLOWING` is not allowed for lower frame boundary. However, `n PRECEDING` is
allowed for upper frame boundary and `n FOLLOWING` is allowed for lower frame
boundary (not at the same time though). This behavior is similar in both
Calcite and Postgres.
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