com.hazelcast.jet.sql.impl.opt.physical.JoinValidationRule Maven / Gradle / Ivy
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* Copyright 2024 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.
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package com.hazelcast.jet.sql.impl.opt.physical;
import com.hazelcast.jet.sql.impl.opt.logical.JoinLogicalRel;
import com.hazelcast.shaded.org.apache.calcite.plan.RelOptRule;
import com.hazelcast.shaded.org.apache.calcite.plan.RelOptRuleCall;
import com.hazelcast.shaded.org.apache.calcite.plan.RelRule;
import com.hazelcast.shaded.org.apache.calcite.plan.RelRule.Config;
import com.hazelcast.shaded.org.apache.calcite.rel.rules.TransformationRule;
import org.immutables.value.Value;
import static com.hazelcast.jet.sql.impl.opt.OptUtils.isUnbounded;
import static com.hazelcast.jet.sql.impl.opt.OptUtils.toPhysicalConvention;
import static com.hazelcast.shaded.org.apache.calcite.rel.core.JoinRelType.INNER;
import static com.hazelcast.shaded.org.apache.calcite.rel.core.JoinRelType.LEFT;
@Value.Enclosing
public final class JoinValidationRule extends RelRule implements TransformationRule {
@Value.Immutable
public interface Config extends RelRule.Config {
Config DEFAULT = ImmutableJoinValidationRule.Config.builder()
.description(JoinValidationRule.class.getSimpleName())
.operandSupplier(b0 -> b0.operand(JoinLogicalRel.class)
.anyInputs()
)
.build();
@Override
default RelOptRule toRule() {
return new JoinValidationRule(this);
}
}
private JoinValidationRule(Config config) {
super(config);
}
@SuppressWarnings("checkstyle:DeclarationOrder")
public static final RelOptRule INSTANCE = new JoinValidationRule(Config.DEFAULT);
@Override
public void onMatch(RelOptRuleCall call) {
JoinLogicalRel join = call.rel(0);
boolean rightInputIsStream = isUnbounded(join.getRight());
// we allow s2s JOIN
if (rightInputIsStream && isUnbounded(join.getLeft())) {
return;
}
if (join.getJoinType() == LEFT) {
if (rightInputIsStream) {
call.transformTo(
new MustNotExecutePhysicalRel(
join.getCluster(),
toPhysicalConvention(join.getTraitSet()),
join.getRowType(),
"The right side of a LEFT JOIN or the left side of RIGHT JOIN cannot be a streaming source"));
}
} else if (join.getJoinType() == INNER) {
if (rightInputIsStream) {
call.transformTo(
new MustNotExecutePhysicalRel(
join.getCluster(),
toPhysicalConvention(join.getTraitSet()),
join.getRowType(),
"The right side of an INNER JOIN cannot be a streaming source"));
}
}
}
}
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