Hello Zoltan Borok-Nagy, Peter Rozsa, Impala Public Jenkins,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/23958
to look at the new patch set (#2).
Change subject: IMPALA-14734: Optimize sorting file descriptors during planning
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IMPALA-14734: Optimize sorting file descriptors during planning
IcebergScanNode sorts the file descriptors by path (IMPALA-12765).
This can dominate planning time if there are many files.
This change makes this faster by avoiding extracting Java
Strings from flatbuffer, which involves utf8 decoding. Also
changes a few similar functions to avoid duplicate decoding.
For a table with ~1 million files:
explain select * from bigice limit 1;
before: ~12s
after: ~6.5s
Change-Id: Icb914eb4de7bdadeb876f7dd101e8737b9527b6f
---
M fe/src/main/java/org/apache/impala/catalog/FileDescriptor.java
M fe/src/main/java/org/apache/impala/planner/IcebergScanNode.java
2 files changed, 23 insertions(+), 8 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/58/23958/2
--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Icb914eb4de7bdadeb876f7dd101e8737b9527b6f
Gerrit-Change-Number: 23958
Gerrit-PatchSet: 2
Gerrit-Owner: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Peter Rozsa <[email protected]>
Gerrit-Reviewer: Zoltan Borok-Nagy <[email protected]>
