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Posted to issues-all@impala.apache.org by "Csaba Ringhofer (JIRA)" <ji...@apache.org> on 2018/11/26 17:56:00 UTC

[jira] [Created] (IMPALA-7889) Write new logical types in Parquet

Csaba Ringhofer created IMPALA-7889:
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             Summary: Write new logical types in Parquet
                 Key: IMPALA-7889
                 URL: https://issues.apache.org/jira/browse/IMPALA-7889
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend
            Reporter: Csaba Ringhofer
            Assignee: Csaba Ringhofer


Parquet added LogicalTypeAnnotation as a new way to express metadata about columns. For types that already exist, the old way (ConvertedType) should be also written to remain compatible with older readers, but new types (like int64 nano) are only added as LogicalTypeAnnotation.



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