com.hazelcast.jet.sql.impl.opt.logical.DeleteByKeyMapLogicalRule Maven / Gradle / Ivy
/*
* Copyright 2021 Hazelcast Inc.
*
* Licensed under the Hazelcast Community License (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://hazelcast.com/hazelcast-community-license
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.jet.sql.impl.opt.logical;
import com.hazelcast.jet.sql.impl.opt.OptUtils;
import com.hazelcast.sql.impl.schema.map.PartitionedMapTable;
import com.hazelcast.org.apache.calcite.plan.RelOptRule;
import com.hazelcast.org.apache.calcite.plan.RelOptRuleCall;
import com.hazelcast.org.apache.calcite.plan.RelOptTable;
import com.hazelcast.org.apache.calcite.rel.core.TableModify;
import com.hazelcast.org.apache.calcite.rel.core.TableScan;
import com.hazelcast.org.apache.calcite.rex.RexNode;
/**
* Planner rule that matches single key, constant expression,
* {@link PartitionedMapTable} DELETE.
* For example,
* DELETE FROM map WHERE __key = 1
*
* Such DELETE is translated to optimized, direct key {@code IMap} operation
* which does not involve starting any job.
*/
public final class DeleteByKeyMapLogicalRule extends RelOptRule {
static final RelOptRule INSTANCE = new DeleteByKeyMapLogicalRule();
private DeleteByKeyMapLogicalRule() {
super(
operandJ(
TableModify.class, null, modify -> !OptUtils.requiresJob(modify) && modify.isDelete(),
operandJ(
TableScan.class,
null,
scan -> OptUtils.hasTableType(scan, PartitionedMapTable.class),
none()
)
),
DeleteByKeyMapLogicalRule.class.getSimpleName()
);
}
@Override
public void onMatch(RelOptRuleCall call) {
TableModify delete = call.rel(0);
TableScan scan = call.rel(1);
RelOptTable table = scan.getTable();
RexNode keyCondition = OptUtils.extractKeyConstantExpression(table, delete.getCluster().getRexBuilder());
if (keyCondition != null) {
DeleteByKeyMapLogicalRel rel = new DeleteByKeyMapLogicalRel(
delete.getCluster(),
OptUtils.toLogicalConvention(delete.getTraitSet()),
table,
keyCondition
);
call.transformTo(rel);
}
}
}