com.hazelcast.org.apache.calcite.interpreter.InterpretableConvention Maven / Gradle / Ivy
/*
* 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 com.hazelcast.org.apache.calcite.interpreter;
import com.hazelcast.org.apache.calcite.adapter.enumerable.EnumerableRel;
import com.hazelcast.org.apache.calcite.plan.Convention;
import com.hazelcast.org.apache.calcite.plan.ConventionTraitDef;
import com.hazelcast.org.apache.calcite.plan.RelOptPlanner;
import com.hazelcast.org.apache.calcite.plan.RelTrait;
import com.hazelcast.org.apache.calcite.plan.RelTraitDef;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
/**
* Calling convention that returns results as an
* {@link com.hazelcast.org.apache.calcite.linq4j.Enumerable} of object arrays.
*
* Unlike enumerable convention, no code generation is required.
*/
public enum InterpretableConvention implements Convention {
INSTANCE;
@Override public String toString() {
return getName();
}
@Override public Class getInterface() {
return EnumerableRel.class;
}
@Override public String getName() {
return "INTERPRETABLE";
}
@Override public RelTraitDef getTraitDef() {
return ConventionTraitDef.INSTANCE;
}
@Override public boolean satisfies(RelTrait trait) {
return this == trait;
}
@Override public void register(RelOptPlanner planner) {}
@Override public boolean canConvertConvention(Convention toConvention) {
return false;
}
@Override public boolean useAbstractConvertersForConversion(RelTraitSet fromTraits,
RelTraitSet toTraits) {
return false;
}
}