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From "Takuya Ueshin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-25058) Use Block.isEmpty/nonEmpty to check whether the code is empty or not.
Date Wed, 08 Aug 2018 17:08:00 GMT
Takuya Ueshin created SPARK-25058:
-------------------------------------

             Summary: Use Block.isEmpty/nonEmpty to check whether the code is empty or not.
                 Key: SPARK-25058
                 URL: https://issues.apache.org/jira/browse/SPARK-25058
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.4.0
            Reporter: Takuya Ueshin


We should use {{Block.isEmpty/nonEmpty}} instead of comparing with empty string to check whether
the code is empty or not.

{noformat}
[error] [warn] /.../sql/core/src/main/scala/org/apache/spark/sql/execution/WholeStageCodegenExec.scala:278:
org.apache.spark.sql.catalyst.expressions.codegen.Block and String are unrelated: they will
most likely always compare unequal
[error] [warn]       if (ev.code != "" && required.contains(attributes(i))) {
[error] [warn] 
[error] [warn] /.../sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashJoinExec.scala:323:
org.apache.spark.sql.catalyst.expressions.codegen.Block and String are unrelated: they will
most likely never compare equal
[error] [warn]          |  ${buildVars.filter(_.code == "").map(v => s"${v.isNull} = true;").mkString("\n")}
[error] [warn] 
{noformat}




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