Sh-Zh-7 commented on code in PR #15151:
URL: https://github.com/apache/iotdb/pull/15151#discussion_r2096899551
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iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/process/FilterAndProjectOperator.java:
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@@ -170,6 +170,7 @@ private TsBlock getFilterTsBlock(TsBlock input) {
if (!hasNonMappableUDF) {
// get result of calculated common sub expressions
for (ColumnTransformer columnTransformer : commonTransformerList) {
+ columnTransformer.tryEvaluate();
Review Comment:
Window function use CASE WHEN operator, which would clear all its cache in
the end for efficiency purpose.
If there is CASE WHEN, and no `.tryEvaluate()`, the `.getColumn()` would
return null.
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