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  1. Spark
  2. SPARK-25672

Inferring schema from CSV string literal

Details

    • Improvement
    • Status: Resolved
    • Minor
    • Resolution: Fixed
    • 2.4.0
    • 3.0.0
    • SQL
    • None

    Description

      Need to add new function - schema_of_csv(). The function should infer schema of CSV string literal. The result of the function is a schema in DDL format.

      One of the use cases is passing output of schema_of_csv() to from_csv() (see SPARK-25393). The new function should allow schema inferring from an example. Let's say csv_col is a column containing CSV string with the same schema. It should be possible to pass a CSV string with the same schema to schema_of_csv() which infers schema for the particular example.

      select from_csv(csv_col, schema_of_csv('1,a,0.1'))
      from csv_table;
      

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        Activity

          apachespark Apache Spark added a comment -

          User 'MaxGekk' has created a pull request for this issue:
          https://github.com/apache/spark/pull/22666

          apachespark Apache Spark added a comment - User 'MaxGekk' has created a pull request for this issue: https://github.com/apache/spark/pull/22666
          apachespark Apache Spark added a comment -

          User 'MaxGekk' has created a pull request for this issue:
          https://github.com/apache/spark/pull/22666

          apachespark Apache Spark added a comment - User 'MaxGekk' has created a pull request for this issue: https://github.com/apache/spark/pull/22666
          gurwls223 Hyukjin Kwon added a comment - - edited

          Issue resolved by pull request 22666
          https://github.com/apache/spark/pull/22666

          gurwls223 Hyukjin Kwon added a comment - - edited Issue resolved by pull request 22666 https://github.com/apache/spark/pull/22666

          People

            maxgekk Max Gekk
            maxgekk Max Gekk
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            Dates

              Created:
              Updated:
              Resolved: