| /* |
| * 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.drill.exec.planner.sql.handlers.AbstractSqlHandler; |
| import org.apache.drill.exec.planner.sql.handlers.DropAliasHandler; |
| import org.apache.drill.exec.planner.sql.handlers.SqlHandlerConfig; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class SqlDropAlias extends DrillSqlCall { |
| |
| private final SqlNode isPublic; |
| private final SqlNode ifExists; |
| private final SqlIdentifier alias; |
| private final SqlNode aliasKind; |
| private final SqlNode user; |
| |
| public static final SqlSpecialOperator OPERATOR = new SqlSpecialOperator("DROP_ALIAS", SqlKind.OTHER_DDL) { |
| @Override |
| public SqlCall createCall(SqlLiteral functionQualifier, SqlParserPos pos, SqlNode... operands) { |
| return SqlDropAlias.builder() |
| .pos(pos) |
| .alias((SqlIdentifier) operands[0]) |
| .aliasKind(operands[1]) |
| .ifExists(operands[2]) |
| .isPublic(operands[3]) |
| .user(operands[4]) |
| .build(); |
| } |
| }; |
| |
| private SqlDropAlias(SqlDropAliasBuilder builder) { |
| super(builder.pos); |
| this.alias = builder.alias; |
| this.ifExists = builder.ifExists; |
| this.isPublic = builder.isPublic; |
| this.aliasKind = builder.aliasKind; |
| this.user = builder.user; |
| } |
| |
| public static SqlDropAliasBuilder builder() { |
| return new SqlDropAliasBuilder(); |
| } |
| |
| @Override |
| public SqlOperator getOperator() { |
| return OPERATOR; |
| } |
| |
| @Override |
| public List<SqlNode> getOperandList() { |
| List<SqlNode> opList = new ArrayList<>(); |
| opList.add(alias); |
| opList.add(aliasKind); |
| opList.add(ifExists); |
| opList.add(isPublic); |
| opList.add(user); |
| return opList; |
| } |
| |
| @Override |
| public void unparse(SqlWriter writer, int leftPrec, int rightPrec) { |
| writer.keyword("DROP"); |
| if (((SqlLiteral) isPublic).booleanValue()) { |
| writer.keyword("PUBLIC"); |
| } |
| writer.keyword("ALIAS"); |
| if (((SqlLiteral) ifExists).booleanValue()) { |
| writer.keyword("IF"); |
| writer.keyword("EXISTS"); |
| } |
| alias.unparse(writer, leftPrec, rightPrec); |
| |
| writer.keyword("FOR"); |
| writer.keyword(((SqlLiteral) aliasKind).toValue()); |
| |
| if (user != null) { |
| writer.keyword("AS"); |
| writer.keyword("USER"); |
| user.unparse(writer, leftPrec, rightPrec); |
| } |
| } |
| |
| @Override |
| public AbstractSqlHandler getSqlHandler(SqlHandlerConfig config) { |
| return new DropAliasHandler(config); |
| } |
| |
| public SqlNode getIsPublic() { |
| return this.isPublic; |
| } |
| |
| public SqlNode getIfExists() { |
| return this.ifExists; |
| } |
| |
| public SqlIdentifier getAlias() { |
| return this.alias; |
| } |
| |
| public SqlNode getAliasKind() { |
| return this.aliasKind; |
| } |
| |
| public SqlNode getUser() { |
| return this.user; |
| } |
| |
| public static class SqlDropAliasBuilder { |
| private SqlParserPos pos; |
| |
| private SqlIdentifier alias; |
| |
| private SqlNode ifExists; |
| |
| private SqlNode isPublic; |
| |
| private SqlNode aliasKind; |
| |
| private SqlNode user; |
| |
| public SqlDropAliasBuilder pos(SqlParserPos pos) { |
| this.pos = pos; |
| return this; |
| } |
| |
| public SqlDropAliasBuilder alias(SqlIdentifier alias) { |
| this.alias = alias; |
| return this; |
| } |
| |
| public SqlDropAliasBuilder ifExists(SqlNode ifExists) { |
| this.ifExists = ifExists; |
| return this; |
| } |
| |
| public SqlDropAliasBuilder isPublic(SqlNode isPublic) { |
| this.isPublic = isPublic; |
| return this; |
| } |
| |
| public SqlDropAliasBuilder aliasKind(SqlNode aliasKind) { |
| this.aliasKind = aliasKind; |
| return this; |
| } |
| |
| public SqlDropAliasBuilder user(SqlNode user) { |
| this.user = user; |
| return this; |
| } |
| |
| public SqlDropAlias build() { |
| return new SqlDropAlias(this); |
| } |
| } |
| } |