/**
* 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.drill.exec.planner.sql.parser;
import java.util.Collections;
import java.util.List;
import net.hydromatic.optiq.tools.Planner;
import org.apache.drill.exec.ops.QueryContext;
import org.apache.drill.exec.planner.sql.handlers.AbstractSqlHandler;
import org.apache.drill.exec.planner.sql.handlers.ShowFileHandler;
import org.apache.drill.exec.planner.sql.handlers.SqlHandlerConfig;
import org.eigenbase.relopt.hep.HepPlanner;
import org.eigenbase.sql.SqlCall;
import org.eigenbase.sql.SqlIdentifier;
import org.eigenbase.sql.SqlKind;
import org.eigenbase.sql.SqlLiteral;
import org.eigenbase.sql.SqlNode;
import org.eigenbase.sql.SqlOperator;
import org.eigenbase.sql.SqlSpecialOperator;
import org.eigenbase.sql.SqlWriter;
import org.eigenbase.sql.parser.SqlParserPos;
/**
* Sql parse tree node to represent statement:
* SHOW FILES [{FROM | IN} db_name] [LIKE 'pattern' | WHERE expr]
*/
public class SqlShowFiles extends DrillSqlCall {
private final SqlIdentifier db;
public static final SqlSpecialOperator OPERATOR =
new SqlSpecialOperator("SHOW_FILES", SqlKind.OTHER) {
@Override
public SqlCall createCall(SqlLiteral functionQualifier, SqlParserPos pos, SqlNode... operands) {
return new SqlShowFiles(pos, (SqlIdentifier) operands[0]);
}
};
public SqlShowFiles(SqlParserPos pos, SqlIdentifier db) {
super(pos);
this.db = db;
}
@Override
public SqlOperator getOperator() {
return OPERATOR;
}
@Override
public List<SqlNode> getOperandList() {
return Collections.singletonList( (SqlNode) db);
}
@Override
public void unparse(SqlWriter writer, int leftPrec, int rightPrec) {
writer.keyword("SHOW");
writer.keyword("FILES");
if (db != null) {
db.unparse(writer, leftPrec, rightPrec);
}
}
@Override
public AbstractSqlHandler getSqlHandler(SqlHandlerConfig config) {
return new ShowFileHandler(config);
}
public SqlIdentifier getDb() { return db; }
}