com.hazelcast.org.apache.calcite.sql.fun.SqlArgumentAssignmentOperator Maven / Gradle / Ivy
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* 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 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.org.apache.calcite.sql.fun;
import com.hazelcast.org.apache.calcite.sql.SqlAsOperator;
import com.hazelcast.org.apache.calcite.sql.SqlCall;
import com.hazelcast.org.apache.calcite.sql.SqlKind;
import com.hazelcast.org.apache.calcite.sql.SqlWriter;
import com.hazelcast.org.apache.calcite.sql.type.InferTypes;
import com.hazelcast.org.apache.calcite.sql.type.OperandTypes;
import com.hazelcast.org.apache.calcite.sql.type.ReturnTypes;
/**
* Operator that assigns an argument to a function call to a particular named
* parameter.
*
* Not an expression; just a holder to represent syntax until the validator
* has chance to resolve arguments.
*
*
Sub-class of {@link SqlAsOperator} ("AS") out of convenience; to be
* consistent with AS, we reverse the arguments.
*/
class SqlArgumentAssignmentOperator extends SqlAsOperator {
SqlArgumentAssignmentOperator() {
super("=>", SqlKind.ARGUMENT_ASSIGNMENT, 20, true, ReturnTypes.ARG0,
InferTypes.RETURN_TYPE, OperandTypes.ANY_ANY);
}
@Override public void unparse(SqlWriter writer, SqlCall call, int leftPrec,
int rightPrec) {
// Arguments are held in reverse order to be consistent with base class (AS).
call.operand(1).unparse(writer, leftPrec, getLeftPrec());
writer.keyword(getName());
call.operand(0).unparse(writer, getRightPrec(), rightPrec);
}
}