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179
...c/test/java/org/apache/calcite/materialize/CustomMaterializedViewRecognitionRuleTest.java
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/* | ||
* 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.calcite.materialize; | ||
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import org.apache.calcite.plan.RelOptMaterialization; | ||
import org.apache.calcite.plan.RelOptMaterializations; | ||
import org.apache.calcite.plan.RelOptUtil; | ||
import org.apache.calcite.plan.RelTraitDef; | ||
import org.apache.calcite.plan.SubstitutionVisitor; | ||
import org.apache.calcite.plan.SubstitutionVisitor.UnifyRule; | ||
import org.apache.calcite.rel.RelNode; | ||
import org.apache.calcite.rel.mutable.MutableCalc; | ||
import org.apache.calcite.rel.type.RelDataType; | ||
import org.apache.calcite.rel.type.RelDataTypeFactory; | ||
import org.apache.calcite.rex.RexCall; | ||
import org.apache.calcite.rex.RexInputRef; | ||
import org.apache.calcite.rex.RexLiteral; | ||
import org.apache.calcite.rex.RexNode; | ||
import org.apache.calcite.rex.RexUtil; | ||
import org.apache.calcite.schema.SchemaPlus; | ||
import org.apache.calcite.schema.impl.AbstractTable; | ||
import org.apache.calcite.sql.SqlKind; | ||
import org.apache.calcite.sql.fun.SqlStdOperatorTable; | ||
import org.apache.calcite.sql.parser.SqlParser; | ||
import org.apache.calcite.sql.type.SqlTypeName; | ||
import org.apache.calcite.test.CalciteAssert; | ||
import org.apache.calcite.test.SqlToRelTestBase; | ||
import org.apache.calcite.tools.Frameworks; | ||
import org.apache.calcite.tools.RelBuilder; | ||
import org.apache.calcite.util.NlsString; | ||
import org.apache.calcite.util.Pair; | ||
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import com.google.common.collect.ImmutableList; | ||
import com.google.common.collect.Lists; | ||
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import org.junit.jupiter.api.Test; | ||
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import java.util.ArrayList; | ||
import java.util.List; | ||
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import static org.apache.calcite.test.Matchers.isLinux; | ||
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import static org.hamcrest.MatcherAssert.assertThat; | ||
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/** | ||
* Unit tests for {@link RelOptMaterializations#useMaterializedViews}. | ||
*/ | ||
public class CustomMaterializedViewRecognitionRuleTest extends SqlToRelTestBase { | ||
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public static Frameworks.ConfigBuilder config() { | ||
final SchemaPlus rootSchema = Frameworks.createRootSchema(true); | ||
rootSchema.add("mv0", new AbstractTable() { | ||
@Override public RelDataType getRowType(RelDataTypeFactory typeFactory) { | ||
return typeFactory.builder() | ||
.add("empno", SqlTypeName.INTEGER) | ||
.add("ename", SqlTypeName.VARCHAR) | ||
.add("job", SqlTypeName.VARCHAR) | ||
.add("mgr", SqlTypeName.SMALLINT) | ||
.add("hiredate", SqlTypeName.DATE) | ||
.add("sal", SqlTypeName.DECIMAL) | ||
.add("comm", SqlTypeName.DECIMAL) | ||
.add("deptno", SqlTypeName.TINYINT) | ||
.build(); | ||
} | ||
}); | ||
return Frameworks.newConfigBuilder() | ||
.parserConfig(SqlParser.Config.DEFAULT) | ||
.defaultSchema( | ||
CalciteAssert.addSchema(rootSchema, CalciteAssert.SchemaSpec.SCOTT_WITH_TEMPORAL)) | ||
.traitDefs((List<RelTraitDef>) null); | ||
} | ||
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@Test void testCushionLikeOperatorRecognitionRule() { | ||
final RelBuilder relBuilder = RelBuilder.create(config().build()); | ||
final RelNode query = relBuilder.scan("EMP") | ||
.filter( | ||
relBuilder.call(SqlStdOperatorTable.LIKE, | ||
relBuilder.field(1), relBuilder.literal("ABCD%"))) | ||
.build(); | ||
final RelNode target = relBuilder.scan("EMP") | ||
.filter( | ||
relBuilder.call(SqlStdOperatorTable.LIKE, | ||
relBuilder.field(1), relBuilder.literal("ABC%"))) | ||
.build(); | ||
final RelNode replacement = relBuilder.scan("mv0").build(); | ||
final RelOptMaterialization relOptMaterialization = | ||
new RelOptMaterialization(replacement, | ||
target, null, Lists.newArrayList("mv0")); | ||
final List<UnifyRule> rules = new ArrayList<>(); | ||
rules.addAll(SubstitutionVisitor.DEFAULT_RULES); | ||
rules.add(CustomizedMaterializationRule.INSTANCE); | ||
final List<Pair<RelNode, List<RelOptMaterialization>>> relOptimized = | ||
RelOptMaterializations.useMaterializedViews(query, | ||
ImmutableList.of(relOptMaterialization), rules); | ||
final String optimized = "" | ||
+ "LogicalCalc(expr#0..7=[{inputs}], expr#8=['ABCD%'], expr#9=[LIKE($t1, $t8)], proj#0." | ||
+ ".7=[{exprs}], $condition=[$t9])\n" | ||
+ " LogicalProject(empno=[CAST($0):SMALLINT NOT NULL], ename=[CAST($1):VARCHAR(10)], " | ||
+ "job=[CAST($2):VARCHAR(9)], mgr=[CAST($3):SMALLINT], hiredate=[CAST($4):DATE], " | ||
+ "sal=[CAST($5):DECIMAL(7, 2)], comm=[CAST($6):DECIMAL(7, 2)], deptno=[CAST($7)" | ||
+ ":TINYINT])\n" | ||
+ " LogicalTableScan(table=[[mv0]])\n"; | ||
final String relOptimizedStr = RelOptUtil.toString(relOptimized.get(0).getKey()); | ||
assertThat(relOptimizedStr, isLinux(optimized)); | ||
} | ||
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/** | ||
* A customized materialization rule, which match expression of 'LIKE' | ||
* and match by compensation. | ||
*/ | ||
private static class CustomizedMaterializationRule | ||
extends SubstitutionVisitor.AbstractUnifyRule { | ||
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public static final CustomizedMaterializationRule INSTANCE = | ||
new CustomizedMaterializationRule(); | ||
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private CustomizedMaterializationRule() { | ||
super(operand(MutableCalc.class, query(0)), | ||
operand(MutableCalc.class, target(0)), 1); | ||
} | ||
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@Override protected SubstitutionVisitor.UnifyResult apply( | ||
SubstitutionVisitor.UnifyRuleCall call) { | ||
final MutableCalc query = (MutableCalc) call.query; | ||
final Pair<RexNode, List<RexNode>> queryExplained = SubstitutionVisitor.explainCalc(query); | ||
final RexNode queryCond = queryExplained.left; | ||
final List<RexNode> queryProjs = queryExplained.right; | ||
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final MutableCalc target = (MutableCalc) call.target; | ||
final Pair<RexNode, List<RexNode>> targetExplained = SubstitutionVisitor.explainCalc(target); | ||
final RexNode targetCond = targetExplained.left; | ||
final List<RexNode> targetProjs = targetExplained.right; | ||
final List parsedQ = parseLikeCondition(queryCond); | ||
final List parsedT = parseLikeCondition(targetCond); | ||
if (RexUtil.isIdentity(queryProjs, query.getInput().rowType) | ||
&& RexUtil.isIdentity(targetProjs, target.getInput().rowType) | ||
&& parsedQ != null && parsedT != null) { | ||
if (parsedQ.get(0).equals(parsedT.get(0))) { | ||
String literalQ = ((NlsString) parsedQ.get(1)).getValue(); | ||
String literalT = ((NlsString) parsedT.get(1)).getValue(); | ||
if (literalQ.endsWith("%") && literalT.endsWith("%") | ||
&& !literalQ.equals(literalT) | ||
&& literalQ.startsWith(literalT.substring(0, literalT.length() - 1))) { | ||
return call.result(MutableCalc.of(target, query.program)); | ||
} | ||
} | ||
} | ||
return null; | ||
} | ||
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private List parseLikeCondition(RexNode rexNode) { | ||
if (rexNode instanceof RexCall) { | ||
RexCall rexCall = (RexCall) rexNode; | ||
if (rexCall.getKind() == SqlKind.LIKE | ||
&& rexCall.operands.get(0) instanceof RexInputRef | ||
&& rexCall.operands.get(1) instanceof RexLiteral) { | ||
return ImmutableList.of(rexCall.operands.get(0), | ||
((RexLiteral) (rexCall.operands.get(1))).getValue()); | ||
} | ||
} | ||
return null; | ||
} | ||
} | ||
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} |
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