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". -- To view, visit http://gerrit.cloudera.org:8080/15370 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings 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
