| /* |
| * 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.List; |
| |
| 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.SqlNodeList; |
| 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.drill.exec.planner.sql.SchemaUtilities; |
| import org.apache.drill.exec.planner.sql.handlers.AbstractSqlHandler; |
| import org.apache.drill.exec.planner.sql.handlers.RefreshMetadataHandler; |
| import org.apache.drill.exec.planner.sql.handlers.SqlHandlerConfig; |
| |
| import org.apache.drill.shaded.guava.com.google.common.collect.Lists; |
| |
| /** |
| * Sql parse tree node to represent statement: |
| * REFRESH TABLE METADATA tblname |
| */ |
| public class SqlRefreshMetadata extends DrillSqlCall { |
| public static final SqlSpecialOperator OPERATOR = new SqlSpecialOperator("REFRESH_TABLE_METADATA", SqlKind.OTHER_DDL) { |
| @Override |
| public SqlCall createCall(SqlLiteral functionQualifier, SqlParserPos pos, SqlNode... operands) { |
| return new SqlRefreshMetadata(pos, (SqlIdentifier) operands[0], (SqlLiteral) operands[1], (SqlNodeList) operands[2]); |
| } |
| }; |
| |
| private SqlIdentifier tblName; |
| private final SqlLiteral allColumns; |
| private final SqlNodeList fieldList; |
| |
| public SqlRefreshMetadata(SqlParserPos pos, SqlIdentifier tblName, SqlLiteral allColumns, SqlNodeList fieldList){ |
| super(pos); |
| this.tblName = tblName; |
| this.allColumns = allColumns; |
| this.fieldList = fieldList; |
| } |
| |
| @Override |
| public SqlOperator getOperator() { |
| return OPERATOR; |
| } |
| |
| @Override |
| public List<SqlNode> getOperandList() { |
| List<SqlNode> ops = Lists.newArrayList(); |
| ops.add(tblName); |
| ops.add(allColumns); |
| ops.add(fieldList); |
| return ops; |
| } |
| |
| @Override |
| public void unparse(SqlWriter writer, int leftPrec, int rightPrec) { |
| writer.keyword("REFRESH"); |
| writer.keyword("TABLE"); |
| writer.keyword("METADATA"); |
| if (!allColumns.booleanValue()) { |
| writer.keyword("COLUMNS"); |
| if (fieldList == null) { |
| writer.keyword("NONE"); |
| } else if (fieldList.size() > 0) { |
| writer.keyword("("); |
| fieldList.get(0).unparse(writer, leftPrec, rightPrec); |
| for (int i = 1; i < fieldList.size(); i++) { |
| writer.keyword(","); |
| fieldList.get(i).unparse(writer, leftPrec, rightPrec); |
| } |
| writer.keyword(")"); |
| } |
| } |
| tblName.unparse(writer, leftPrec, rightPrec); |
| } |
| |
| public String getName() { |
| if (tblName.isSimple()) { |
| return tblName.getSimple(); |
| } |
| |
| return tblName.names.get(tblName.names.size() - 1); |
| } |
| |
| public List<String> getSchemaPath() { |
| return SchemaUtilities.getSchemaPath(tblName); |
| } |
| |
| @Override |
| public AbstractSqlHandler getSqlHandler(SqlHandlerConfig config) { |
| return new RefreshMetadataHandler(config); |
| } |
| |
| public SqlNodeList getFieldList() { |
| return fieldList; |
| } |
| |
| public SqlLiteral getAllColumns() { |
| return allColumns; |
| } |
| } |