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DRILL-4279: Improve query performance when no column is required from… #342

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jinfengni wants to merge 1 commit into apache:master from jinfengni:DRILL-4279

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jinfengni commented Jan 28, 2016

… scan operator.

Use different approaches, when no column is not required from scan operator.

If data source is schemed, use the first column in the schema.
Use 'columns[0]' for text reader.
Use the current skip_all reader for JSON input.
Use a default column name for other schema-less input.

jinfengni force-pushed the DRILL-4279 branch from 137f593 to 665ee7a Compare

January 28, 2016 19:58


          DRILL-4279: Improve performance for skipAll query against Text/JSON/P…

ffc12f7

…arquet table.

jinfengni force-pushed the DRILL-4279 branch from 665ee7a to ffc12f7 Compare

January 29, 2016 06:22

Contributor Author

jinfengni commented Oct 3, 2016

Close this PR, as the patch has been merged to Drill.

jinfengni closed this

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