Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/15168#discussion_r80419524
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/tables.scala ---
@@ -420,17 +424,40 @@ case class DescribeTableCommand(table:
TableIdentifier, isExtended: Boolean, isF
val catalog = sparkSession.sessionState.catalog
if (catalog.isTemporaryTable(table)) {
+ if (partitionSpec.nonEmpty) {
+ throw new AnalysisException(
+ s"DESC PARTITION is not allowed on a temporary view:
${table.identifier}")
+ }
describeSchema(catalog.lookupRelation(table).schema, result)
} else {
val metadata = catalog.getTableMetadata(table)
describeSchema(metadata.schema, result)
- if (isExtended) {
- describeExtended(metadata, result)
- } else if (isFormatted) {
- describeFormatted(metadata, result)
+ describePartitionInfo(metadata, result)
+
+ if (partitionSpec.isEmpty) {
+ if (isExtended) {
+ describeExtendedTableInfo(metadata, result)
+ } else if (isFormatted) {
+ describeFormattedTableInfo(metadata, result)
+ describeStorageInfo(metadata, result)
+ }
} else {
- describePartitionInfo(metadata, result)
+ if (metadata.tableType == CatalogTableType.VIEW) {
+ throw new AnalysisException(
+ s"DESC PARTITION is not allowed on a view:
${table.identifier}")
+ }
+ if (DDLUtils.isDatasourceTable(metadata)) {
+ throw new AnalysisException(
+ s"DESC PARTITION is not allowed on a datasource table:
${table.identifier}")
+ }
+ val partition = catalog.getPartition(table, partitionSpec)
+ if (isExtended) {
+ describeExtendedDetailPartitionInfo(table, metadata, partition,
result)
+ } else if (isFormatted) {
+ describeFormattedDetailPartitionInfo(table, metadata, partition,
result)
+ describeStorageInfo(metadata, result)
+ }
--- End diff --
Create another function for LOC 446 to LOC 460? Compared with the existing
one, the new implementation looks a little bit cumbersome
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