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Posted to reviews@spark.apache.org by koertkuipers <gi...@git.apache.org> on 2018/08/15 21:50:03 UTC

[GitHub] spark issue #21296: [SPARK-24244][SQL] Passing only required columns to the ...

Github user koertkuipers commented on the issue:

    https://github.com/apache/spark/pull/21296
  
    if i do not select a schema (and i use inferSchema), and i do a select for only a few column, does this push down the column selection into the reading of data (for schema inference and for the actual data read)?


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