Github user bomeng commented on a diff in the pull request:
https://github.com/apache/spark/pull/12104#discussion_r58268616
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/commands.scala
---
@@ -365,18 +364,20 @@ case class ShowFunctions(db: Option[String], pattern:
Option[String]) extends Ru
schema.toAttributes
}
- override def run(sqlContext: SQLContext): Seq[Row] = pattern match {
- case Some(p) =>
- try {
- val regex = java.util.regex.Pattern.compile(p)
- sqlContext.sessionState.functionRegistry.listFunction()
- .filter(regex.matcher(_).matches()).map(Row(_))
- } catch {
- // probably will failed in the regex that user provided, then
returns empty row.
- case _: Throwable => Seq.empty[Row]
- }
- case None =>
- sqlContext.sessionState.functionRegistry.listFunction().map(Row(_))
+ override def run(sqlContext: SQLContext): Seq[Row] = {
+ val catalog = sqlContext.sessionState.catalog
+ val database = db.getOrElse(catalog.getCurrentDatabase)
+ pattern match {
+ case Some(p) =>
+ try {
+ catalog.listFunctions(database, p).map{f: FunctionIdentifier =>
Row(f.name)}
+ } catch {
+ // probably will failed in the regex that user provided, then
returns empty row.
+ case _: Throwable => Seq.empty[Row]
--- End diff --
Is this an over-kill? I think the original code is fine.
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