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Added Bloom Filter for Orc Files #345

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@shalumariamsheji shalumariamsheji commented Apr 19, 2022

What type of PR is this?

task

What does this PR do / why do we need it:

Added bloom index to ORC Files for performance improvement while reading.

  • Utf8-Bloom Index Write Support is added in ORC files for Real, Date, Timestamp and Char data types for both transactional and non-transactional tables.
  • Read flow modified to skip stripes and row groups in ORC based on bloom index.
  • Added Timestamp Statistics to Column Statistics.

The table created with bloom filter is skipping few splits and reading less rows:

Screenshot from 2022-04-19 19-17-43 (copy)

Which issue(s) this PR fixes:

None

Special notes for your reviewers:

@it-is-a-robot
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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: shalumariamsheji
To complete the pull request process, please assign sraghunandan
You can assign the PR to them by writing /assign @sraghunandan in a comment when ready.

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@Nitin-Kashyap
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lgtm

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3 participants