Added Bloom Filter for Orc Files

shalumariamsheji commented 2 years ago

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 commented 2 years ago

[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 commented 2 years ago

lgtm

openlookeng / hetu-core