KurtYoung commented on a change in pull request #8244: [FLINK-11945]
[table-runtime-blink] Support over aggregation for blink streaming runtime
URL: https://github.com/apache/flink/pull/8244#discussion_r283598342
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File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/plan/nodes/physical/stream/StreamExecOverAggregate.scala
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@@ -17,25 +17,35 @@
*/
package org.apache.flink.table.plan.nodes.physical.stream
-import org.apache.flink.streaming.api.transformations.StreamTransformation
-import org.apache.flink.table.CalcitePair
-import org.apache.flink.table.api.{StreamTableEnvironment, TableException}
-import org.apache.flink.table.calcite.FlinkTypeFactory
-import org.apache.flink.table.dataformat.BaseRow
-import org.apache.flink.table.plan.nodes.exec.{ExecNode, StreamExecNode}
-import org.apache.flink.table.plan.util.RelExplainUtil
-
import org.apache.calcite.plan.{RelOptCluster, RelOptCost, RelOptPlanner,
RelTraitSet}
import org.apache.calcite.rel.`type`.RelDataType
import org.apache.calcite.rel.core.Window.Group
import org.apache.calcite.rel.core.{AggregateCall, Window}
import org.apache.calcite.rel.metadata.RelMetadataQuery
import org.apache.calcite.rel.{RelNode, RelWriter, SingleRel}
import org.apache.calcite.rex.RexLiteral
+import org.apache.calcite.rel.RelFieldCollation.Direction.ASCENDING
Review comment:
Please keep import order align with other files, you can find some
explaination here: https://flink.apache.org/contribute-code.html#imports
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