com.hazelcast.org.apache.calcite.sql.fun.SqlConvertFunction 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.sql.fun;
import com.hazelcast.org.apache.calcite.sql.SqlCall;
import com.hazelcast.org.apache.calcite.sql.SqlFunction;
import com.hazelcast.org.apache.calcite.sql.SqlFunctionCategory;
import com.hazelcast.org.apache.calcite.sql.SqlKind;
import com.hazelcast.org.apache.calcite.sql.SqlWriter;
/**
* Common base for the CONVERT
and TRANSLATE
* functions.
*/
public class SqlConvertFunction extends SqlFunction {
//~ Constructors -----------------------------------------------------------
protected SqlConvertFunction(String name) {
super(
name,
SqlKind.OTHER_FUNCTION,
null,
null,
null,
SqlFunctionCategory.STRING);
}
//~ Methods ----------------------------------------------------------------
@Override public void unparse(
SqlWriter writer,
SqlCall call,
int leftPrec,
int rightPrec) {
final SqlWriter.Frame frame = writer.startFunCall(getName());
call.operand(0).unparse(writer, leftPrec, rightPrec);
writer.sep("USING");
call.operand(1).unparse(writer, leftPrec, rightPrec);
writer.endFunCall(frame);
}
@Override public String getSignatureTemplate(final int operandsCount) {
switch (operandsCount) {
case 2:
return "{0}({1} USING {2})";
default:
break;
}
throw new IllegalStateException("operandsCount should be 2, got " + operandsCount);
}
}
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