abstractdog commented on pull request #1950:
URL: https://github.com/apache/hive/pull/1950#issuecomment-775826706
> Hey @abstractdog change makes sense to me -- question is how often do we
really call the TsBoundary Scanner during range computation? Is the test
representative of the scanario?
>
> Would the optimization make sense to other types as well e.g.,
TimestampLocalTZ or Date?
this could be heavy code path yes, as in case range based windows, every row
needs to be checked:
```
at
org.apache.hadoop.hive.common.type.Timestamp.setTimeInSeconds(Timestamp.java:133)
at
org.apache.hadoop.hive.serde2.io.TimestampWritableV2.populateTimestamp(TimestampWritableV2.java:401)
at
org.apache.hadoop.hive.serde2.io.TimestampWritableV2.getTimestamp(TimestampWritableV2.java:210)
at
org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorUtils.getTimestamp(PrimitiveObjectInspectorUtils.java:1239)
at
org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorUtils.getTimestamp(PrimitiveObjectInspectorUtils.java:1181)
at
org.apache.hadoop.hive.ql.udf.ptf.TimestampValueBoundaryScanner.isEqual(ValueBoundaryScanner.java:848)
at
org.apache.hadoop.hive.ql.udf.ptf.SingleValueBoundaryScanner.computeEndCurrentRow(ValueBoundaryScanner.java:593)
at
org.apache.hadoop.hive.ql.udf.ptf.SingleValueBoundaryScanner.computeEnd(ValueBoundaryScanner.java:530)
at
org.apache.hadoop.hive.ql.udf.ptf.BasePartitionEvaluator.getRange(BasePartitionEvaluator.java:273)
at
org.apache.hadoop.hive.ql.udf.ptf.BasePartitionEvaluator.iterate(BasePartitionEvaluator.java:219)
at
org.apache.hadoop.hive.ql.udf.ptf.WindowingTableFunction.evaluateWindowFunction(WindowingTableFunction.java:147)
at
org.apache.hadoop.hive.ql.udf.ptf.WindowingTableFunction.access$100(WindowingTableFunction.java:61)
at
org.apache.hadoop.hive.ql.udf.ptf.WindowingTableFunction$WindowingIterator.next(WindowingTableFunction.java:755)
at
org.apache.hadoop.hive.ql.exec.PTFOperator$PTFInvocation.finishPartition(PTFOperator.java:373)
at
org.apache.hadoop.hive.ql.exec.PTFOperator.closeOp(PTFOperator.java:104)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:732)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:756)
at
org.apache.hadoop.hive.ql.exec.tez.ReduceRecordProcessor.close(ReduceRecordProcessor.java:383)
at
org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:284)
at
org.apache.hadoop.hive.ql.exec.tez.TezProcessor.run(TezProcessor.java:250)
```
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