// 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
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package org.apache.impala.analysis;

import com.google.common.base.Preconditions;
import org.apache.impala.authorization.Privilege;
import org.apache.impala.common.AnalysisException;
import org.apache.impala.thrift.TCommentOnParams;

/**
 * Represents a COMMENT ON DATABASE db IS 'comment' statement.
 */
public class CommentOnDbStmt extends CommentOnStmt {
  private final String dbName_;

  public CommentOnDbStmt(String dbName, String comment) {
    super(comment);
    Preconditions.checkNotNull(dbName);
    dbName_ = dbName;
  }

  @Override
  public void analyze(Analyzer analyzer) throws AnalysisException {
    super.analyze(analyzer);
    analyzer.getDb(dbName_, Privilege.ALTER);
  }

  @Override
  public TCommentOnParams toThrift() {
    TCommentOnParams params = super.toThrift();
    params.setDb(dbName_);
    return params;
  }
}