Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/6745#discussion_r32119209
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/commands.scala ---
@@ -256,3 +256,33 @@ case class CreateMetastoreDataSourceAsSelect(
Seq.empty[Row]
}
}
+
+private[hive]
+case class ShowTablesCommand(databaseName: Option[String], pattern:
Option[String]) extends RunnableCommand {
+
+ // The result of SHOW TABLES has two columns, tableName and isTemporary.
+ override val output: Seq[Attribute] = {
+ val schema = StructType(
+ StructField("tableName", StringType, false) ::
+ StructField("isTemporary", BooleanType, false) :: Nil)
+
+ schema.toAttributes
+ }
+
+ override def run(sqlContext: SQLContext): Seq[Row] = {
+ // Since we need to return a Seq of rows, we will call getTables
directly
+ // instead of calling tables in sqlContext.
+ val rows = pattern.isDefined match {
--- End diff --
Use `pattern.map(...).getOrElse(...)` instead.
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