/*
* 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.ambari.view.hive20.internal.query.generators;
import com.google.common.base.Optional;
import org.apache.ambari.view.hive20.exceptions.ServiceException;
public class FetchColumnStatsQueryGenerator implements QueryGenerator{
private final String databaseName;
private final String tableName;
private final String columnName;
public FetchColumnStatsQueryGenerator(String databaseName, String tableName, String columnName) {
this.databaseName = databaseName;
this.tableName = tableName;
this.columnName = columnName;
}
@Override
public Optional<String> getQuery() throws ServiceException {
return Optional.of("DESCRIBE FORMATTED " + "`" + this.databaseName + "`.`" + this.tableName + "` `" + this.columnName +
"`" );
}
}