| <#-- |
| |
| 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. |
| |
| --> |
| /** |
| * Parses a Drill compound identifier. |
| */ |
| SqlIdentifier CompoundIdentifier() : |
| { |
| DrillCompoundIdentifier.Builder builder = DrillCompoundIdentifier.newBuilder(); |
| String p; |
| int index; |
| } |
| { |
| p = Identifier() |
| { |
| builder.addString(p, getPos()); |
| } |
| ( |
| ( |
| <DOT> |
| ( |
| p = Identifier() { |
| builder.addString(p, getPos()); |
| } |
| | |
| <STAR> { |
| builder.addString("*", getPos()); |
| } |
| ) |
| ) |
| | |
| ( |
| <LBRACKET> |
| index = UnsignedIntLiteral() |
| <RBRACKET> |
| { |
| builder.addIndex(index, getPos()); |
| } |
| ) |
| ) * |
| { |
| return builder.build(); |
| } |
| } |
| |
| /** |
| * Parses a compound identifier in the FROM clause. |
| */ |
| SqlIdentifier CompoundTableIdentifier() : |
| { |
| final List<String> nameList = new ArrayList<String>(); |
| final List<SqlParserPos> posList = new ArrayList<SqlParserPos>(); |
| } |
| { |
| AddTableIdentifierSegment(nameList, posList) |
| ( |
| LOOKAHEAD(2) |
| <DOT> |
| AddTableIdentifierSegment(nameList, posList) |
| )* |
| { |
| SqlParserPos pos = SqlParserPos.sum(posList); |
| return new SqlIdentifier(nameList, null, pos, posList); |
| } |
| } |
| |
| /** |
| * Parses a comma-separated list of compound identifiers. |
| */ |
| void AddCompoundIdentifierTypeCommaList(List<SqlNode> list, List<SqlNode> extendList) : |
| { |
| } |
| { |
| AddCompoundIdentifierType(list, extendList) |
| (<COMMA> AddCompoundIdentifierType(list, extendList))* |
| } |
| |
| /** |
| * List of compound identifiers in parentheses. The position extends from the |
| * open parenthesis to the close parenthesis. |
| */ |
| Pair<SqlNodeList, SqlNodeList> ParenthesizedCompoundIdentifierList() : |
| { |
| final Span s; |
| final List<SqlNode> list = new ArrayList<SqlNode>(); |
| final List<SqlNode> extendList = new ArrayList<SqlNode>(); |
| } |
| { |
| <LPAREN> { s = span(); } |
| AddCompoundIdentifierTypeCommaList(list, extendList) |
| <RPAREN> { |
| return Pair.of(new SqlNodeList(list, s.end(this)), new SqlNodeList(extendList, s.end(this))); |
| } |
| } |