Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/13494#discussion_r69395014
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/MetadataOnlyOptimizerSuite.scala
---
@@ -0,0 +1,87 @@
+/*
+ * 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.execution
+
+import org.apache.spark.sql._
+import org.apache.spark.sql.catalyst.plans.logical.LocalRelation
+import org.apache.spark.sql.internal.SQLConf
+import org.apache.spark.sql.test.SharedSQLContext
+
+class MetadataOnlyOptimizerSuite extends QueryTest with SharedSQLContext {
+ import testImplicits._
+
+ override def beforeAll(): Unit = {
+ super.beforeAll()
+ val data = (1 to 10).map(i => (i, s"data-$i", i % 2, if ((i % 2) == 0)
"even" else "odd"))
+ .toDF("id", "data", "partId", "part")
+ data.write.partitionBy("partId",
"part").mode("append").saveAsTable("srcpart_15752")
+ }
+
+ private def checkWithMetadataOnly(df: DataFrame): Unit = {
+ val localRelations = df.queryExecution.optimizedPlan.collect {
+ case l @ LocalRelation(_, _) => l
+ }
+ assert(localRelations.size == 1)
+ }
+
+ private def checkWithoutMetadataOnly(df: DataFrame): Unit = {
+ val localRelations = df.queryExecution.optimizedPlan.collect{
+ case l @ LocalRelation(_, _) => l
+ }
+ assert(localRelations.size == 0)
+ }
+
+ test("spark-15752 metadata only optimizer for partition table") {
+ withSQLConf(SQLConf.OPTIMIZER_METADATA_ONLY.key -> "true") {
+ checkWithMetadataOnly(sql("select part from srcpart_15752 where part
= 0 group by part"))
+ checkWithMetadataOnly(sql("select max(part) from srcpart_15752"))
+ checkWithMetadataOnly(sql("select max(part) from srcpart_15752 where
part = 0"))
+ checkWithMetadataOnly(
+ sql("select part, min(partId) from srcpart_15752 where part = 0
group by part"))
+ checkWithMetadataOnly(
+ sql("select max(x) from (select part + 1 as x from srcpart_15752
where part = 1) t"))
+ checkWithMetadataOnly(sql("select distinct part from srcpart_15752"))
+ checkWithMetadataOnly(sql("select distinct part, partId from
srcpart_15752"))
+ checkWithMetadataOnly(
+ sql("select distinct x from (select part + 1 as x from
srcpart_15752 where part = 0) t"))
+
+ // Now donot support metadata only optimizer
+ checkWithoutMetadataOnly(sql("select part, max(id) from
srcpart_15752 group by part"))
+ checkWithoutMetadataOnly(sql("select distinct part, id from
srcpart_15752"))
+ checkWithoutMetadataOnly(sql("select part, sum(partId) from
srcpart_15752 group by part"))
+ checkWithoutMetadataOnly(
+ sql("select part from srcpart_15752 where part = 1 group by
rollup(part)"))
+ checkWithoutMetadataOnly(
+ sql("select part from (select part from srcpart_15752 where part =
0 union all " +
--- End diff --
the last 2 cases can be added in follow-up PRs :)
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