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Add planner tests for SetFlatteningOptimizer
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132
...c/test/java/com/facebook/presto/sql/planner/optimizations/TestSetFlatteningOptimizer.java
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| /* | ||
| * Licensed 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 com.facebook.presto.sql.planner.optimizations; | ||
|
|
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| import com.facebook.presto.sql.planner.assertions.BasePlanTest; | ||
| import com.facebook.presto.sql.planner.assertions.PlanMatchPattern; | ||
| import com.google.common.collect.ImmutableList; | ||
| import org.testng.annotations.Test; | ||
|
|
||
| import java.util.List; | ||
|
|
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| import static com.facebook.presto.sql.planner.assertions.PlanMatchPattern.anyTree; | ||
| import static com.facebook.presto.sql.planner.assertions.PlanMatchPattern.except; | ||
| import static com.facebook.presto.sql.planner.assertions.PlanMatchPattern.intersect; | ||
| import static com.facebook.presto.sql.planner.assertions.PlanMatchPattern.tableScan; | ||
| import static com.facebook.presto.sql.planner.assertions.PlanMatchPattern.union; | ||
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|
||
| public class TestSetFlatteningOptimizer | ||
| extends BasePlanTest | ||
| { | ||
| @Test | ||
| public void testFlattensUnion() | ||
| { | ||
| assertPlan( | ||
| "(SELECT * FROM nation UNION SELECT * FROM nation)" + | ||
| "UNION (SELECT * FROM nation UNION SELECT * FROM nation)", | ||
| anyTree( | ||
| union( | ||
| tableScan("nation"), | ||
| tableScan("nation"), | ||
| tableScan("nation"), | ||
| tableScan("nation")))); | ||
| } | ||
|
|
||
| @Test | ||
| public void testFlattensUnionAll() | ||
| { | ||
| assertPlan( | ||
| "(SELECT * FROM nation UNION ALL SELECT * FROM nation)" + | ||
| "UNION ALL (SELECT * FROM nation UNION ALL SELECT * FROM nation)", | ||
| anyTree( | ||
| union( | ||
| tableScan("nation"), | ||
| tableScan("nation"), | ||
| tableScan("nation"), | ||
| tableScan("nation")))); | ||
| } | ||
|
|
||
| @Test | ||
| public void testFlattensUnionAndUnionAllWhenAllowed() | ||
| { | ||
| assertPlan( | ||
| "SELECT * FROM nation " + | ||
| "UNION ALL (SELECT * FROM nation " + | ||
| "UNION (SELECT * FROM nation UNION ALL select * FROM nation))", | ||
| anyTree( | ||
| union( | ||
| tableScan("nation"), | ||
| anyTree( | ||
| union( | ||
| tableScan("nation"), | ||
| tableScan("nation"), | ||
| tableScan("nation")))))); | ||
| } | ||
|
|
||
| @Test | ||
| public void testFlattensIntersect() | ||
| { | ||
| assertPlan( | ||
| "(SELECT * FROM nation INTERSECT SELECT * FROM nation)" + | ||
| "INTERSECT (SELECT * FROM nation INTERSECT SELECT * FROM nation)", | ||
| anyTree( | ||
| intersect( | ||
| tableScan("nation"), | ||
| tableScan("nation"), | ||
| tableScan("nation"), | ||
| tableScan("nation")))); | ||
| } | ||
|
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| @Test | ||
| public void testFlattensOnlyFirstInputOfExcept() | ||
| { | ||
| assertPlan( | ||
| "(SELECT * FROM nation EXCEPT SELECT * FROM nation)" + | ||
| "EXCEPT (SELECT * FROM nation EXCEPT SELECT * FROM nation)", | ||
| anyTree( | ||
| except( | ||
| tableScan("nation"), | ||
| tableScan("nation"), | ||
| except( | ||
| tableScan("nation"), | ||
| tableScan("nation"))))); | ||
| } | ||
|
|
||
| @Test | ||
| public void testDoesNotFlattenDifferentSetOperations() | ||
| { | ||
| assertPlan( | ||
| "(SELECT * FROM nation EXCEPT SELECT * FROM nation)" + | ||
| "UNION (SELECT * FROM nation INTERSECT SELECT * FROM nation)", | ||
| anyTree( | ||
| union( | ||
| except( | ||
| tableScan("nation"), | ||
| tableScan("nation")), | ||
| intersect( | ||
| tableScan("nation"), | ||
| tableScan("nation"))))); | ||
| } | ||
|
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||
| public void assertPlan(String sql, PlanMatchPattern pattern) | ||
| { | ||
| List<PlanOptimizer> optimizers = ImmutableList.of( | ||
| new UnaliasSymbolReferences(), | ||
| new PruneUnreferencedOutputs(), | ||
| new PruneIdentityProjections(), | ||
| new SetFlatteningOptimizer()); | ||
| assertPlanWithOptimizers(sql, pattern, optimizers); | ||
| } | ||
| } |