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Posted to commits@wayang.apache.org by "github-actions[bot] (via GitHub)" <gi...@apache.org> on 2023/04/16 08:50:18 UTC
[GitHub] [incubator-wayang] github-actions[bot] opened a new issue, #293: a cleaner way to handle this
github-actions[bot] opened a new issue, #293:
URL: https://github.com/apache/incubator-wayang/issues/293
a cleaner way to handle this
https://github.com/apache/incubator-wayang/blob/d46f3c3f0fb963c2ee2640f00a106042fba55431/wayang-api/wayang-api-sql/src/main/java/org/apache/wayang/api/sql/calcite/rules/WayangRules.java#L134
```java
/*
* 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.wayang.api.sql.calcite.rules;
import org.apache.calcite.adapter.enumerable.EnumerableConvention;
import org.apache.calcite.plan.Convention;
import org.apache.calcite.plan.RelOptRule;
import org.apache.calcite.plan.RelOptTable;
import org.apache.calcite.rel.RelNode;
import org.apache.calcite.rel.convert.ConverterRule;
import org.apache.calcite.rel.core.TableScan;
import org.apache.calcite.rel.logical.LogicalFilter;
import org.apache.calcite.rel.logical.LogicalJoin;
import org.apache.calcite.rel.logical.LogicalProject;
import org.apache.calcite.rel.logical.LogicalTableScan;
import org.apache.wayang.api.sql.calcite.convention.WayangConvention;
import org.apache.wayang.api.sql.calcite.rel.WayangFilter;
import org.apache.wayang.api.sql.calcite.rel.WayangJoin;
import org.apache.wayang.api.sql.calcite.rel.WayangProject;
import org.apache.wayang.api.sql.calcite.rel.WayangTableScan;
import org.checkerframework.checker.nullness.qual.Nullable;
import java.util.ArrayList;
import java.util.List;
//TODO: split into multiple classes
public class WayangRules {
private WayangRules(){
}
public static final RelOptRule WAYANG_JOIN_RULE = new WayangJoinRule(WayangJoinRule.DEFAULT_CONFIG);
public static final RelOptRule WAYANG_PROJECT_RULE = new WayangProjectRule(WayangProjectRule.DEFAULT_CONFIG);
public static final RelOptRule WAYANG_FILTER_RULE = new WayangFilterRule(WayangFilterRule.DEFAULT_CONFIG);
public static final RelOptRule WAYANG_TABLESCAN_RULE = new WayangTableScanRule(WayangTableScanRule.DEFAULT_CONFIG);
public static final RelOptRule WAYANG_TABLESCAN_ENUMERABLE_RULE =
new WayangTableScanRule(WayangTableScanRule.ENUMERABLE_CONFIG);
private static class WayangProjectRule extends ConverterRule {
public static final Config DEFAULT_CONFIG = Config.INSTANCE
.withConversion(LogicalProject.class,
Convention.NONE, WayangConvention.INSTANCE,
"WayangProjectRule")
.withRuleFactory(WayangProjectRule::new);
protected WayangProjectRule(Config config) {
super(config);
}
public RelNode convert(RelNode rel) {
final LogicalProject project = (LogicalProject) rel;
return new WayangProject(
project.getCluster(),
project.getTraitSet().replace(WayangConvention.INSTANCE),
convert(project.getInput(), project.getInput().getTraitSet()
.replace(WayangConvention.INSTANCE)),
project.getProjects(),
project.getRowType());
}
}
private static class WayangFilterRule extends ConverterRule {
public static final Config DEFAULT_CONFIG = Config.INSTANCE
.withConversion(LogicalFilter.class,
Convention.NONE, WayangConvention.INSTANCE,
"WayangFilterRule")
.withRuleFactory(WayangFilterRule::new);
protected WayangFilterRule(Config config) {
super(config);
}
@Override
public RelNode convert(RelNode rel) {
final LogicalFilter filter = (LogicalFilter) rel;
return new WayangFilter(
rel.getCluster(),
rel.getTraitSet().replace(WayangConvention.INSTANCE),
convert(filter.getInput(), filter.getInput().getTraitSet().
replace(WayangConvention.INSTANCE)),
filter.getCondition());
}
}
private static class WayangTableScanRule extends ConverterRule {
public static final Config DEFAULT_CONFIG = Config.INSTANCE
.withConversion(LogicalTableScan.class,
Convention.NONE, WayangConvention.INSTANCE,
"WayangTableScanRule")
.withRuleFactory(WayangTableScanRule::new);
public static final Config ENUMERABLE_CONFIG = Config.INSTANCE
.withConversion(TableScan.class,
EnumerableConvention.INSTANCE, WayangConvention.INSTANCE,
"WayangTableScanRule1")
.withRuleFactory(WayangTableScanRule::new);
protected WayangTableScanRule(Config config) {
super(config);
}
@Override
public @Nullable RelNode convert(RelNode relNode) {
TableScan scan = (TableScan) relNode;
final RelOptTable relOptTable = scan.getTable();
/**
* This is quick hack to prevent volcano from merging projects on to TableScans
* TODO: a cleaner way to handle this
*/
if(relOptTable.getRowType() == scan.getRowType()) {
return WayangTableScan.create(scan.getCluster(), relOptTable);
}
return null;
}
}
private static class WayangJoinRule extends ConverterRule {
public static final Config DEFAULT_CONFIG = Config.INSTANCE
.withConversion(LogicalJoin.class, Convention.NONE,
WayangConvention.INSTANCE, "WayangJoinRule")
.withRuleFactory(WayangJoinRule::new);
protected WayangJoinRule(Config config) {
super(config);
}
@Override
public @Nullable RelNode convert(RelNode relNode) {
LogicalJoin join = (LogicalJoin) relNode;
List<RelNode> newInputs = new ArrayList<>();
for(RelNode input : join.getInputs()) {
if(!(input.getConvention() instanceof WayangConvention)) {
input = convert(input, input.getTraitSet().replace(WayangConvention.INSTANCE));
}
newInputs.add(input);
}
return new WayangJoin(
join.getCluster(),
join.getTraitSet().replace(WayangConvention.INSTANCE),
newInputs.get(0),
newInputs.get(1),
join.getCondition(),
join.getVariablesSet(),
join.getJoinType()
);
}
}
}
```
0f23df970ae28b4fb0903f6f11d9ad9196a81871
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