diff options
4 files changed, 61 insertions, 8 deletions
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/sources/ddl.scala b/sql/core/src/main/scala/org/apache/spark/sql/sources/ddl.scala index 9c37e0169f..a692ef51b3 100644 --- a/sql/core/src/main/scala/org/apache/spark/sql/sources/ddl.scala +++ b/sql/core/src/main/scala/org/apache/spark/sql/sources/ddl.scala @@ -296,11 +296,14 @@ private[sql] case class ResolvedDataSource(provider: Class[_], relation: BaseRel private[sql] case class DescribeCommand( table: LogicalPlan, isExtended: Boolean) extends Command { - override def output = Seq( + override val output = Seq( // Column names are based on Hive. - AttributeReference("col_name", StringType, nullable = false)(), - AttributeReference("data_type", StringType, nullable = false)(), - AttributeReference("comment", StringType, nullable = false)()) + AttributeReference("col_name", StringType, nullable = false, + new MetadataBuilder().putString("comment", "name of the column").build())(), + AttributeReference("data_type", StringType, nullable = false, + new MetadataBuilder().putString("comment", "data type of the column").build())(), + AttributeReference("comment", StringType, nullable = false, + new MetadataBuilder().putString("comment", "comment of the column").build())()) } private[sql] case class CreateTableUsing( diff --git a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala index be63aa1a93..4b7fa06532 100644 --- a/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala +++ b/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveQl.scala @@ -497,15 +497,14 @@ https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C // TODO: Actually, a user may mean tableName.columnName. Need to resolve this issue. val tableIdent = extractTableIdent(nameParts.head) DescribeCommand( - UnresolvedRelation(tableIdent, None), extended.isDefined) + UnresolvedRelation(tableIdent, None), isExtended = extended.isDefined) case Token(".", dbName :: tableName :: colName :: Nil) => // It is describing a column with the format like "describe db.table column". NativePlaceholder case tableName => // It is describing a table with the format like "describe table". DescribeCommand( - UnresolvedRelation(Seq(tableName.getText), None), - extended.isDefined) + UnresolvedRelation(Seq(tableName.getText), None), isExtended = extended.isDefined) } } // All other cases. diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveOperatorQueryableSuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveOperatorQueryableSuite.scala new file mode 100644 index 0000000000..efbef68cd4 --- /dev/null +++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveOperatorQueryableSuite.scala @@ -0,0 +1,51 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.spark.sql.hive.execution + +import org.apache.spark.sql.{Row, QueryTest} +import org.apache.spark.sql.hive.test.TestHive._ + +/** + * A set of tests that validates commands can also be queried by like a table + */ +class HiveOperatorQueryableSuite extends QueryTest { + test("SPARK-5324 query result of describe command") { + loadTestTable("src") + + // register a describe command to be a temp table + sql("desc src").registerTempTable("mydesc") + checkAnswer( + sql("desc mydesc"), + Seq( + Row("col_name", "string", "name of the column"), + Row("data_type", "string", "data type of the column"), + Row("comment", "string", "comment of the column"))) + + checkAnswer( + sql("select * from mydesc"), + Seq( + Row("key", "int", null), + Row("value", "string", null))) + + checkAnswer( + sql("select col_name, data_type, comment from mydesc"), + Seq( + Row("key", "int", null), + Row("value", "string", null))) + } +} diff --git a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala index d16a1e0b73..27047ce4b1 100644 --- a/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala +++ b/sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveQuerySuite.scala @@ -59,7 +59,7 @@ class HiveQuerySuite extends HiveComparisonTest with BeforeAndAfter { Locale.setDefault(originalLocale) } - test("SPARK-4908: concurent hive native commands") { + test("SPARK-4908: concurrent hive native commands") { (1 to 100).par.map { _ => sql("USE default") sql("SHOW TABLES") |