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https://issues.apache.org/jira/browse/SPARK-33945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-33945:
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Assignee: (was: Apache Spark)
> Handles a random seed consisting of an expr tree
> ------------------------------------------------
>
> Key: SPARK-33945
> URL: https://issues.apache.org/jira/browse/SPARK-33945
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.8, 3.0.2, 3.1.0
> Reporter: Takeshi Yamamuro
> Priority: Minor
>
> This ticket aims at fixing the minor bug that throws an analysis exception
> when a seed param in `rand`/`randn` having a expr tree (e.g., `rand(1 + 1)`)
> with constant folding (`ConstantFolding` and `ReorderAssociativeOperator`)
> disabled. A query to reproduce this issue is as follows;
> {code}
> // v3.1.0, v3.0.2, and v2.4.8
> $./bin/spark-shell
> scala> sql("select rand(1 + 2)").show()
> +-------------------+
> | rand((1 + 2))|
> +-------------------+
> |0.25738143505962285|
> +-------------------+
> $./bin/spark-shell --conf
> spark.sql.optimizer.excludedRules=org.apache.spark.sql.catalyst.optimizer.ConstantFolding,org.apache.spark.sql.catalyst.optimizer.ReorderAssociativeOperator
> scala> sql("select rand(1 + 2)").show()
> org.apache.spark.sql.AnalysisException: Input argument to rand must be an
> integer, long or null literal.;
> at
> org.apache.spark.sql.catalyst.expressions.RDG.seed$lzycompute(randomExpressions.scala:49)
> at
> org.apache.spark.sql.catalyst.expressions.RDG.seed(randomExpressions.scala:46)
> at
> org.apache.spark.sql.catalyst.expressions.Rand.doGenCode(randomExpressions.scala:98)
> at
> org.apache.spark.sql.catalyst.expressions.Expression.$anonfun$genCode$3(Expression.scala:146)
> at scala.Option.getOrElse(Option.scala:189)
> ...
> {code}
> A root cause is that the match-case code below cannot handle the case
> described above:
> https://github.com/apache/spark/blob/42f5e62403469cec6da680b9fbedd0aa508dcbe5/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/randomExpressions.scala#L46-L51
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