com.hazelcast.org.apache.calcite.sql.SqlAlter 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;
import com.hazelcast.org.apache.calcite.sql.parser.SqlParserPos;
/**
* Base class for an ALTER statements parse tree nodes. The portion of the
* statement covered by this class is "ALTER <SCOPE>. Subclasses handle
* whatever comes after the scope.
*/
public abstract class SqlAlter extends SqlCall {
/** Scope of the operation. Values "SYSTEM" and "SESSION" are typical. */
String scope;
public SqlAlter(SqlParserPos pos) {
this(pos, null);
}
public SqlAlter(SqlParserPos pos, String scope) {
super(pos);
this.scope = scope;
}
@Override public final void unparse(SqlWriter writer, int leftPrec, int rightPrec) {
if (scope != null) {
writer.keyword("ALTER");
writer.keyword(scope);
}
unparseAlterOperation(writer, leftPrec, rightPrec);
}
protected abstract void unparseAlterOperation(SqlWriter writer, int leftPrec, int rightPrec);
public String getScope() {
return scope;
}
public void setScope(String scope) {
this.scope = scope;
}
}