[SPARK] Optimize : SELECT COUNT(*) FROM Table WHERE partitition=1 #3345
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cc @felipepessoto Can you help with review or guidance? |
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@7mming7 I'm travelling on vacation, it will take some time to review it. Anyway, you will need an approval from one of the maintainers. |
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@felipepessoto I see. Have a nice vacation. |
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Which Delta project/connector is this regarding?
Description
Running the query "SELECT COUNT(*), MIN(X), MAX(X) FROM table WHERE partition_column = 1" takes a lot of time for big tables, Spark scan all the parquet files just to return the number of rows and min max values, that information is available from Delta Logs
Resolves #1916
How was this patch tested?
Created unit tests to validate the optimization works
Does this PR introduce any user-facing changes?
Only performance improvement