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Posted to issues@spark.apache.org by "Maxim Gekk (JIRA)" <ji...@apache.org> on 2019/03/02 12:16:00 UTC

[jira] [Created] (SPARK-27031) Avoid double formatting in timestampToString

Maxim Gekk created SPARK-27031:
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             Summary: Avoid double formatting in timestampToString
                 Key: SPARK-27031
                 URL: https://issues.apache.org/jira/browse/SPARK-27031
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.4.0
            Reporter: Maxim Gekk


The method DateTimeUtils.timestampToString performs converting of its input to string twice:
- First time by converting microseconds to java.sql.Timestamp and toString: https://github.com/apache/spark/blob/8e5f9995cad409799f3646b3d03761a771ea1664/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala#L103
- Second time by using provided formatter: https://github.com/apache/spark/blob/8e5f9995cad409799f3646b3d03761a771ea1664/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala#L104

This could be avoided by using specialised TimestampFormatter. 




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