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https://issues.apache.org/jira/browse/IMPALA-9040?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17401503#comment-17401503
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Quanlong Huang edited comment on IMPALA-9040 at 8/19/21, 7:05 AM:
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[[email protected]] IIRC, bloom filters in ORC files will be used if we push
down predicates into the ORC reader (ORC library). So IMPALA-6505 and
IMPALA-10873 will cover this.
was (Author: stiga-huang):
[[email protected]] IIRC, bloom filters will be used if we push down
predicates into the ORC reader (ORC library). So IMPALA-6505 and IMPALA-10873
will cover this.
> Read performance improvements in ORC support
> --------------------------------------------
>
> Key: IMPALA-9040
> URL: https://issues.apache.org/jira/browse/IMPALA-9040
> Project: IMPALA
> Issue Type: Epic
> Components: Backend
> Reporter: Quanlong Huang
> Priority: Major
>
> Performance improvements in ORC scanner includes memory management, async-io,
> Codegen, predicates pushdown etc.
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