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Posted to issues@spark.apache.org by "Cheng Lian (JIRA)" <ji...@apache.org> on 2018/02/22 01:14:00 UTC

[jira] [Created] (SPARK-23486) LookupFunctions should not check the same function name more than once

Cheng Lian created SPARK-23486:
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             Summary: LookupFunctions should not check the same function name more than once
                 Key: SPARK-23486
                 URL: https://issues.apache.org/jira/browse/SPARK-23486
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.2.1, 2.3.0
            Reporter: Cheng Lian


For a query invoking the same function multiple times, the current {{LookupFunctions}} rule performs a check for each invocation. For users using Hive metastore as external catalog, this issues unnecessary metastore accesses and can slow down the analysis phase quite a bit.



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