Riza Suminto has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/15370 )

Change subject: IMPALA-6636: Use async IO in ORC scanner
......................................................................


Patch Set 25:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/15370/25/fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java
File fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java:

http://gerrit.cloudera.org:8080/#/c/15370/25/fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java@2199
PS25, Line 2199: the current ORC scanner does not have the select
               :         // count(*) optimization yet like in Parquet.
> Select count(*) over nested column still need to read an ORC column, for ex
typo, I mean "not doing it in async manner".



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I348ad9e55f0cae7dff0d74d941b026dcbf5e4074
Gerrit-Change-Number: 15370
Gerrit-PatchSet: 25
Gerrit-Owner: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Kurt Deschler <[email protected]>
Gerrit-Reviewer: Quanlong Huang <[email protected]>
Gerrit-Reviewer: Riza Suminto <[email protected]>
Gerrit-Comment-Date: Tue, 01 Feb 2022 04:50:34 +0000
Gerrit-HasComments: Yes

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