Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/10733#discussion_r49819690
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateViewAsSelect.scala
---
@@ -44,26 +47,36 @@ private[hive] case class CreateViewAsSelect(
override def run(sqlContext: SQLContext): Seq[Row] = {
val hiveContext = sqlContext.asInstanceOf[HiveContext]
- if (hiveContext.catalog.tableExists(tableIdentifier)) {
- if (allowExisting) {
+ hiveContext.catalog.tableExists(tableIdentifier) match {
+ case true if allowExisting =>
// view already exists, will do nothing, to keep consistent with
Hive
- } else if (orReplace) {
- hiveContext.catalog.client.alertView(prepareTable())
- } else {
+
+ case true if orReplace =>
+ hiveContext.catalog.client.alertView(prepareTable(sqlContext))
+
+ case true =>
throw new AnalysisException(s"View $tableIdentifier already
exists. " +
"If you want to update the view definition, please use ALTER
VIEW AS or " +
"CREATE OR REPLACE VIEW AS")
- }
- } else {
- hiveContext.catalog.client.createView(prepareTable())
+
+ case false =>
+ hiveContext.catalog.client.createView(prepareTable(sqlContext))
}
Seq.empty[Row]
}
- private def prepareTable(): HiveTable = {
- // setup column types according to the schema of child.
- val schema = if (tableDesc.schema == Nil) {
+ private def prepareTable(sqlContext: SQLContext): HiveTable = {
+ val expandedText = if (sqlContext.conf.canonicalView) {
+ rebuildViewQueryString(sqlContext).getOrElse(expandViewText)
+ } else {
+ expandViewText
+ }
+ tableDesc.copy(schema = viewSchema, viewText = Some(expandedText))
+ }
+
+ private def viewSchema: Seq[HiveColumn] = {
--- End diff --
Should we inline this?
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