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https://issues.apache.org/jira/browse/SPARK-29379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16946526#comment-16946526
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angerszhu commented on SPARK-29379:
-----------------------------------
Don't need to add new expression class.
If we just add code in ShowFunctionsCommand, we should change a lot UT about
functions:
{code:java}
case class ShowFunctionsCommand(
db: Option[String],
pattern: Option[String],
showUserFunctions: Boolean,
showSystemFunctions: Boolean) extends RunnableCommand {
override val output: Seq[Attribute] = {
val schema = StructType(StructField("function", StringType, nullable =
false) :: Nil)
schema.toAttributes
}
override def run(sparkSession: SparkSession): Seq[Row] = {
val dbName =
db.getOrElse(sparkSession.sessionState.catalog.getCurrentDatabase)
// If pattern is not specified, we use '*', which is used to
// match any sequence of characters (including no characters).
val functionNames =
sparkSession.sessionState.catalog
.listFunctions(dbName, pattern.getOrElse("*"))
.collect {
case (f, "USER") if showUserFunctions => f.unquotedString
case (f, "SYSTEM") if showSystemFunctions => f.unquotedString
}
(functionNames ++ Seq("!=", "<>", "between", "case")).sorted.map(Row(_))
}
}
{code}
> SHOW FUNCTIONS don't show '!=', '<>' , 'between', 'case'
> --------------------------------------------------------
>
> Key: SPARK-29379
> URL: https://issues.apache.org/jira/browse/SPARK-29379
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.0, 3.0.0
> Reporter: angerszhu
> Priority: Major
>
> SHOW FUNCTIONS don't show '!=', '<>' , 'between', 'case'
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