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Posted to issues@spark.apache.org by "Hongbo (JIRA)" <ji...@apache.org> on 2017/11/03 20:15:00 UTC

[jira] [Created] (SPARK-22441) JDBC REAL type is mapped to Double instead of Float

Hongbo created SPARK-22441:
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             Summary: JDBC REAL type is mapped to Double instead of Float
                 Key: SPARK-22441
                 URL: https://issues.apache.org/jira/browse/SPARK-22441
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.2.0
            Reporter: Hongbo
            Priority: Minor


In [JDBC Specification|http://download.oracle.com/otn-pub/jcp/jdbc-4_1-mrel-eval-spec/jdbc4.1-fr-spec.pdf], REAL should be mapped to Float. 
But now, it's mapped to Double:
[https://github.com/apache/spark/blob/bc7ca9786e162e33f29d57c4aacb830761b97221/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala#L220]

Should it be changed according to the specification?



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