| /* |
| * 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.drill.exec.planner.sql.SchemaUtilities; |
| import org.apache.drill.shaded.guava.com.google.common.collect.Lists; |
| import org.apache.drill.exec.planner.sql.handlers.AbstractSqlHandler; |
| import org.apache.drill.exec.planner.sql.handlers.SqlHandlerConfig; |
| import org.apache.drill.exec.planner.sql.handlers.SqlHandlerUtil; |
| import org.apache.drill.exec.planner.sql.handlers.ViewHandler; |
| import org.apache.calcite.sql.parser.SqlParserPos; |
| 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 java.util.List; |
| |
| public class SqlCreateView extends DrillSqlCall { |
| public static final SqlSpecialOperator OPERATOR = new SqlSpecialOperator("CREATE_VIEW", SqlKind.CREATE_VIEW) { |
| @Override |
| public SqlCall createCall(SqlLiteral functionQualifier, SqlParserPos pos, SqlNode... operands) { |
| return new SqlCreateView(pos, (SqlIdentifier) operands[0], (SqlNodeList) operands[1], operands[2], (SqlLiteral) operands[3]); |
| } |
| }; |
| |
| private SqlIdentifier viewName; |
| private SqlNodeList fieldList; |
| private SqlNode query; |
| private SqlLiteral createType; |
| |
| public SqlCreateView(SqlParserPos pos, SqlIdentifier viewName, SqlNodeList fieldList, |
| SqlNode query, SqlLiteral createType) { |
| super(pos); |
| this.viewName = viewName; |
| this.query = query; |
| this.fieldList = fieldList; |
| this.createType = createType; |
| } |
| |
| @Override |
| public SqlOperator getOperator() { |
| return OPERATOR; |
| } |
| |
| @Override |
| public List<SqlNode> getOperandList() { |
| List<SqlNode> ops = Lists.newArrayList(); |
| ops.add(viewName); |
| ops.add(fieldList); |
| ops.add(query); |
| ops.add(createType); |
| return ops; |
| } |
| |
| @Override |
| public void unparse(SqlWriter writer, int leftPrec, int rightPrec) { |
| writer.keyword("CREATE"); |
| switch (SqlCreateType.valueOf(createType.toValue())) { |
| case SIMPLE: |
| writer.keyword("VIEW"); |
| break; |
| case OR_REPLACE: |
| writer.keyword("OR"); |
| writer.keyword("REPLACE"); |
| writer.keyword("VIEW"); |
| break; |
| case IF_NOT_EXISTS: |
| writer.keyword("VIEW"); |
| writer.keyword("IF"); |
| writer.keyword("NOT"); |
| writer.keyword("EXISTS"); |
| break; |
| } |
| viewName.unparse(writer, leftPrec, rightPrec); |
| if (fieldList.size() > 0) { |
| SqlHandlerUtil.unparseSqlNodeList(writer, leftPrec, rightPrec, fieldList); |
| } |
| writer.keyword("AS"); |
| query.unparse(writer, leftPrec, rightPrec); |
| } |
| |
| @Override |
| public AbstractSqlHandler getSqlHandler(SqlHandlerConfig config) { |
| return new ViewHandler.CreateView(config); |
| } |
| |
| public List<String> getSchemaPath() { |
| return SchemaUtilities.getSchemaPath(viewName); |
| } |
| |
| public String getName() { |
| if (viewName.isSimple()) { |
| return viewName.getSimple(); |
| } |
| |
| return viewName.names.get(viewName.names.size() - 1); |
| } |
| |
| public List<String> getFieldNames() { |
| List<String> fieldNames = Lists.newArrayList(); |
| for (SqlNode node : fieldList.getList()) { |
| fieldNames.add(node.toString()); |
| } |
| return fieldNames; |
| } |
| |
| public SqlNode getQuery() { return query; } |
| |
| public SqlCreateType getSqlCreateType() { return SqlCreateType.valueOf(createType.toValue()); } |
| |
| } |