com.hazelcast.org.apache.calcite.rel.type.DynamicRecordType 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.rel.type;
/**
* Specific type of RelRecordType that corresponds to a dynamic table,
* where columns are created as they are requested.
*/
public abstract class DynamicRecordType extends RelDataTypeImpl {
// The prefix string for dynamic star column name
public static final String DYNAMIC_STAR_PREFIX = "**";
@Override public boolean isDynamicStruct() {
return true;
}
/**
* Returns true if the column name starts with DYNAMIC_STAR_PREFIX.
*/
public static boolean isDynamicStarColName(String name) {
return name.startsWith(DYNAMIC_STAR_PREFIX);
}
}