| /* |
| * 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 org.apache.calcite.sql.SqlCall; |
| import org.apache.calcite.sql.SqlIdentifier; |
| import org.apache.calcite.sql.SqlKind; |
| import org.apache.calcite.sql.SqlLiteral; |
| import org.apache.calcite.sql.SqlNode; |
| import org.apache.calcite.sql.SqlOperator; |
| import org.apache.calcite.sql.SqlSpecialOperator; |
| import org.apache.calcite.sql.SqlWriter; |
| import org.apache.calcite.sql.parser.SqlParserPos; |
| import org.apache.calcite.util.Util; |
| import org.apache.drill.exec.planner.sql.SchemaUtilites; |
| import org.apache.drill.exec.planner.sql.handlers.AbstractSqlHandler; |
| import org.apache.drill.exec.planner.sql.handlers.MetastoreDropTableMetadataHandler; |
| import org.apache.drill.exec.planner.sql.handlers.SqlHandlerConfig; |
| import org.apache.drill.exec.util.Pointer; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| |
| public class SqlDropTableMetadata extends DrillSqlCall { |
| |
| public static final SqlSpecialOperator OPERATOR = new SqlSpecialOperator("DROP_TABLE_METADATA", SqlKind.OTHER) { |
| @Override |
| public SqlCall createCall(SqlLiteral functionQualifier, SqlParserPos pos, SqlNode... operands) { |
| return new SqlDropTableMetadata(pos, (SqlIdentifier) operands[0], (SqlLiteral) operands[1], (SqlLiteral) operands[2]); |
| } |
| }; |
| |
| private final SqlIdentifier tableName; |
| private final boolean checkMetadataExistence; |
| private final DropMetadataType dropType; |
| |
| public SqlDropTableMetadata(SqlParserPos pos, SqlIdentifier tableName, SqlLiteral dropType, SqlLiteral checkMetadataExistence) { |
| super(pos); |
| this.tableName = tableName; |
| this.dropType = DropMetadataType.valueOf(dropType.getStringValue().toUpperCase()); |
| this.checkMetadataExistence = checkMetadataExistence.booleanValue(); |
| } |
| |
| @Override |
| public SqlOperator getOperator() { |
| return OPERATOR; |
| } |
| |
| @Override |
| public List<SqlNode> getOperandList() { |
| return Arrays.asList( |
| tableName, |
| SqlLiteral.createCharString(dropType.name(), SqlParserPos.ZERO), |
| SqlLiteral.createBoolean(checkMetadataExistence, SqlParserPos.ZERO) |
| ); |
| } |
| |
| @Override |
| public void unparse(SqlWriter writer, int leftPrec, int rightPrec) { |
| writer.keyword("ANALYZE"); |
| writer.keyword("TABLE"); |
| tableName.unparse(writer, leftPrec, rightPrec); |
| writer.keyword("DROP"); |
| writer.keyword(dropType.name()); |
| if (checkMetadataExistence) { |
| writer.keyword("IF"); |
| writer.keyword("EXISTS"); |
| } |
| } |
| |
| @Override |
| public AbstractSqlHandler getSqlHandler(SqlHandlerConfig config, Pointer<String> textPlan) { |
| return new MetastoreDropTableMetadataHandler(config, textPlan); |
| } |
| |
| @Override |
| public AbstractSqlHandler getSqlHandler(SqlHandlerConfig config) { |
| return getSqlHandler(config, null); |
| } |
| |
| public List<String> getSchemaPath() { |
| return SchemaUtilites.getSchemaPath(tableName); |
| } |
| |
| public String getName() { |
| return Util.last(tableName.names); |
| } |
| |
| public boolean checkMetadataExistence() { |
| return checkMetadataExistence; |
| } |
| |
| public DropMetadataType getDropType() { |
| return dropType; |
| } |
| |
| /** |
| * Enum for metadata types to drop. |
| */ |
| public enum DropMetadataType { |
| METADATA, |
| STATISTICS |
| } |
| } |