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https://issues.apache.org/jira/browse/IMPALA-5050?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16575124#comment-16575124
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Csaba Ringhofer commented on IMPALA-5050:
-----------------------------------------
I have done some benchmarks with https://gerrit.cloudera.org/#/c/11057/ :
reading a parquet file with 9999999 timestamps took 0.42 sec with int64
milli/micro, and 0.32 sec with int96 nano (my work desktop machine, release
build, quite stable results).
With some changes in sub-second unix time->TimestampValue conversion I could
bring down reading milli/micro to 0.32 too.
I plan to do this change in a separate commit, IMPALA-7417 is created to track
this.
> Add support to read TIMESTAMP_MILLIS and TIMESTAMP_MICROS to the parquet
> scanner
> --------------------------------------------------------------------------------
>
> Key: IMPALA-5050
> URL: https://issues.apache.org/jira/browse/IMPALA-5050
> Project: IMPALA
> Issue Type: New Feature
> Components: Backend
> Affects Versions: Impala 2.9.0
> Reporter: Lars Volker
> Assignee: Csaba Ringhofer
> Priority: Major
>
> This requires updating {{parquet.thrift}} to a version that includes the
> {{TIMESTAMP_MICROS}} logical type.
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