zml1206 commented on code in PR #44145:
URL: https://github.com/apache/spark/pull/44145#discussion_r1473972315
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/InferWindowGroupLimit.scala:
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@@ -17,21 +17,25 @@
package org.apache.spark.sql.catalyst.optimizer
-import org.apache.spark.sql.catalyst.expressions.{Alias, Attribute,
CurrentRow, DenseRank, EqualTo, Expression, GreaterThan, GreaterThanOrEqual,
IntegerLiteral, LessThan, LessThanOrEqual, Literal, NamedExpression,
PredicateHelper, Rank, RowFrame, RowNumber, SpecifiedWindowFrame,
UnboundedPreceding, WindowExpression, WindowSpecDefinition}
-import org.apache.spark.sql.catalyst.plans.logical.{Filter, Limit,
LocalRelation, LogicalPlan, Window, WindowGroupLimit}
+import org.apache.spark.sql.catalyst.expressions.{Alias, Attribute,
CurrentRow, DenseRank, EqualTo, Expression, GreaterThan, GreaterThanOrEqual,
IntegerLiteral, LessThan, LessThanOrEqual, Literal, NamedExpression,
PredicateHelper, Rank, RowFrame, RowNumber, SizeBasedWindowFunction,
SpecifiedWindowFrame, UnboundedPreceding, WindowExpression,
WindowSpecDefinition}
+import org.apache.spark.sql.catalyst.plans.logical._
import org.apache.spark.sql.catalyst.rules.Rule
-import org.apache.spark.sql.catalyst.trees.TreePattern.{FILTER, WINDOW}
+import org.apache.spark.sql.catalyst.trees.TreePattern.{FILTER, LIMIT, WINDOW}
/**
* Inserts a `WindowGroupLimit` below `Window` if the `Window` has rank-like
functions
- * and the function results are further filtered by limit-like predicates.
Example query:
+ * and the function results are further filtered by limit-like predicates or
cumulative
+ * aggregation with limit excludes `SizeBasedWindowFunction`. Example query:
Review Comment:
Start a new PR is better? Because bug is caused by rank-like filter throuth
window, this pr is limit throuth window.
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