com.hazelcast.sql.impl.calcite.validate.operators.HazelcastSqlBinaryOperator Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in com.hazelcast.com.liance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.com.hazelcast.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.com.hazelcast.sql.impl.calcite.validate.operators;
import com.hazelcast.com.hazelcast.sql.impl.calcite.validate.HazelcastSqlOperatorTable;
import com.hazelcast.org.apache.calcite.sql.SqlBinaryOperator;
import com.hazelcast.org.apache.calcite.sql.SqlKind;
import com.hazelcast.org.apache.calcite.sql.SqlOperatorBinding;
import com.hazelcast.org.apache.calcite.sql.type.SqlOperandTypeChecker;
import com.hazelcast.org.apache.calcite.sql.type.SqlOperandTypeInference;
import com.hazelcast.org.apache.calcite.sql.type.SqlReturnTypeInference;
import com.hazelcast.org.apache.calcite.sql.validate.SqlMonotonicity;
import com.hazelcast.org.apache.calcite.util.Litmus;
/**
* The same as {@link SqlBinaryOperator}, but supports monotonicity for NULL
* literals and operators from our custom {@link HazelcastSqlOperatorTable}.
*/
public class HazelcastSqlBinaryOperator extends SqlBinaryOperator {
public HazelcastSqlBinaryOperator(String name, SqlKind kind, int prec, boolean leftAssoc,
SqlReturnTypeInference returnTypeInference, SqlOperandTypeInference operandTypeInference,
SqlOperandTypeChecker operandTypeChecker) {
super(name, kind, prec, leftAssoc, returnTypeInference, operandTypeInference, operandTypeChecker);
}
@Override
public SqlMonotonicity getMonotonicity(SqlOperatorBinding call) {
// XXX: super method does the same, but doesn't consider NULLs to be
// producing results with the constant monotonicity.
if (getName().equals("/") && (call.isOperandNull(0, true) || call.isOperandNull(1, true))) {
return SqlMonotonicity.CONSTANT;
}
return super.getMonotonicity(call);
}
@Override
public boolean validRexOperands(int count, Litmus litmus) {
// XXX: super method does the same, but works only for operators from
// Calcite's standard SqlStdOperatorTable.
if ((this == HazelcastSqlOperatorTable.AND || this == HazelcastSqlOperatorTable.OR) && count > 2) {
return true;
}
return super.validRexOperands(count, litmus);
}
}