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Pushdown dereference expression to Parquet reader #870

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Pushdown dereference expression to Parquet reader #870

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JamesRTaylor
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Rebased @qqibrow patch to Presto master. When querying nested data, this patch improved our performance 40x (120 seconds -> 3 seconds). Great work, @qqibrow!

@oneonestar oneonestar mentioned this pull request Jul 29, 2019
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@tooptoop4
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@JamesRTaylor many conflicts

@martint
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martint commented Aug 4, 2020

This has already been merged as part of another PR.

@martint martint closed this Aug 4, 2020
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@JamesRTaylor @tooptoop4 @martint @qqibrow