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Posted to issues@spark.apache.org by "Maxim Gekk (JIRA)" <ji...@apache.org> on 2018/07/28 16:07:00 UTC

[jira] [Created] (SPARK-24959) Do not invoke the CSV/JSON parser for empty schema

Maxim Gekk created SPARK-24959:
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             Summary: Do not invoke the CSV/JSON parser for empty schema
                 Key: SPARK-24959
                 URL: https://issues.apache.org/jira/browse/SPARK-24959
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.3.1
            Reporter: Maxim Gekk


Currently JSON and CSV parsers are called even if required schema is empty. Invoking the parser per each line has some non-zero overhead. The action can be skipped. Such optimization should speed up count(), for example.



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