/**
* 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 org.apache.tajo.engine.function.builtin;
import org.apache.tajo.catalog.CatalogUtil;
import org.apache.tajo.catalog.Column;
import org.apache.tajo.common.TajoDataTypes;
import org.apache.tajo.engine.function.annotation.Description;
import org.apache.tajo.engine.function.annotation.ParamTypes;
@Description(
functionName = "last_value",
description = "the last value of expr",
example = "> SELECT last_value(expr);",
returnType = TajoDataTypes.Type.DATE,
paramTypes = {@ParamTypes(paramTypes = {TajoDataTypes.Type.DATE})}
)
public class LastValueDate extends LastValue {
public LastValueDate() {
super(new Column[] {
new Column("expr", TajoDataTypes.Type.DATE)
});
}
@Override
public TajoDataTypes.DataType getPartialResultType() {
return CatalogUtil.newSimpleDataType(TajoDataTypes.Type.DATE);
}
}