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Posted to issues@spark.apache.org by "Cheng Lian (JIRA)" <ji...@apache.org> on 2014/09/20 00:52:33 UTC

[jira] [Created] (SPARK-3609) Add sizeInBytes statistics to Limit operator

Cheng Lian created SPARK-3609:
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             Summary: Add sizeInBytes statistics to Limit operator
                 Key: SPARK-3609
                 URL: https://issues.apache.org/jira/browse/SPARK-3609
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 1.1.0
            Reporter: Cheng Lian


The {{sizeInBytes}} statistics of a {{LIMIT}} operator can be estimated fairly precisely when all output attributes are of native data types, all native data types except {{StringType}} have fixed size. For {{StringType}}, we can use a relatively large (say 4K) default size.



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