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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2015/08/28 23:26:46 UTC

[jira] [Created] (SPARK-10343) Consider nullability of expression in codegen

Davies Liu created SPARK-10343:
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             Summary: Consider nullability of expression in codegen
                 Key: SPARK-10343
                 URL: https://issues.apache.org/jira/browse/SPARK-10343
             Project: Spark
          Issue Type: Improvement
          Components: SQL
            Reporter: Davies Liu
            Priority: Critical


In codegen, we didn't consider nullability of expressions. Once considering this, we can avoid lots of null check (reduce the size of generated code, also improve performance).

Before that, we should double-check the correctness of nullablity of all expressions and schema, or we will hit NPE or wrong results.



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