bool ParserInsertQuery::parseImpl(Pos & pos, Pos end, ASTPtr & node, Pos & max_parsed_pos, Expected & expected) { Pos begin = pos; ParserWhiteSpaceOrComments ws; ParserString s_insert("INSERT", true, true); ParserString s_into("INTO", true, true); ParserString s_dot("."); ParserString s_id("ID"); ParserString s_eq("="); ParserStringLiteral id_p; ParserString s_values("VALUES", true, true); ParserString s_format("FORMAT", true, true); ParserString s_select("SELECT", true, true); ParserString s_lparen("("); ParserString s_rparen(")"); ParserIdentifier name_p; ParserList columns_p(std::make_unique<ParserCompoundIdentifier>(), std::make_unique<ParserString>(","), false); ASTPtr database; ASTPtr table; ASTPtr columns; ASTPtr format; ASTPtr select; ASTPtr id; /// Данные для вставки const char * data = nullptr; ws.ignore(pos, end); /// INSERT INTO if (!s_insert.ignore(pos, end, max_parsed_pos, expected) || !ws.ignore(pos, end) || !s_into.ignore(pos, end, max_parsed_pos, expected)) return false; ws.ignore(pos, end); if (!name_p.parse(pos, end, table, max_parsed_pos, expected)) return false; ws.ignore(pos, end); if (s_dot.ignore(pos, end, max_parsed_pos, expected)) { database = table; if (!name_p.parse(pos, end, table, max_parsed_pos, expected)) return false; ws.ignore(pos, end); } ws.ignore(pos, end); if (s_id.ignore(pos, end, max_parsed_pos, expected)) { if (!s_eq.ignore(pos, end, max_parsed_pos, expected)) return false; ws.ignore(pos, end); if (!id_p.parse(pos, end, id, max_parsed_pos, expected)) return false; } ws.ignore(pos, end); /// Есть ли список столбцов if (s_lparen.ignore(pos, end, max_parsed_pos, expected)) { ws.ignore(pos, end); if (!columns_p.parse(pos, end, columns, max_parsed_pos, expected)) return false; ws.ignore(pos, end); if (!s_rparen.ignore(pos, end, max_parsed_pos, expected)) return false; } ws.ignore(pos, end); Pos before_select = pos; /// VALUES или FORMAT или SELECT if (s_values.ignore(pos, end, max_parsed_pos, expected)) { ws.ignore(pos, end); data = pos; pos = end; } else if (s_format.ignore(pos, end, max_parsed_pos, expected)) { ws.ignore(pos, end); if (!name_p.parse(pos, end, format, max_parsed_pos, expected)) return false; /// Данные начинаются после первого перевода строки, если такой есть, или после всех пробельных символов, иначе. ParserWhiteSpaceOrComments ws_without_nl(false); ws_without_nl.ignore(pos, end); if (pos != end && *pos == ';') throw Exception("You have excessive ';' symbol before data for INSERT.\n" "Example:\n\n" "INSERT INTO t (x, y) FORMAT TabSeparated\n" "1\tHello\n" "2\tWorld\n" "\n" "Note that there is no ';' in first line.", ErrorCodes::SYNTAX_ERROR); if (pos != end && *pos == '\n') ++pos; data = pos; pos = end; } else if (s_select.ignore(pos, end, max_parsed_pos, expected)) { pos = before_select; ParserSelectQuery select_p; select_p.parse(pos, end, select, max_parsed_pos, expected); } else { expected = "VALUES or FORMAT or SELECT"; return false; } auto query = std::make_shared<ASTInsertQuery>(StringRange(begin, data ? data : pos)); node = query; if (database) query->database = typeid_cast<ASTIdentifier &>(*database).name; query->table = typeid_cast<ASTIdentifier &>(*table).name; if (id) query->insert_id = safeGet<const String &>(typeid_cast<ASTLiteral &>(*id).value); if (format) query->format = typeid_cast<ASTIdentifier &>(*format).name; query->columns = columns; query->select = select; query->data = data != end ? data : NULL; query->end = end; if (columns) query->children.push_back(columns); if (select) query->children.push_back(select); return true; }
bool ParserInsertQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected) { ParserKeyword s_insert_into("INSERT INTO"); ParserKeyword s_table("TABLE"); ParserKeyword s_function("FUNCTION"); ParserToken s_dot(TokenType::Dot); ParserKeyword s_values("VALUES"); ParserKeyword s_format("FORMAT"); ParserKeyword s_select("SELECT"); ParserKeyword s_with("WITH"); ParserToken s_lparen(TokenType::OpeningRoundBracket); ParserToken s_rparen(TokenType::ClosingRoundBracket); ParserIdentifier name_p; ParserList columns_p(std::make_unique<ParserCompoundIdentifier>(), std::make_unique<ParserToken>(TokenType::Comma), false); ParserFunction table_function_p; ASTPtr database; ASTPtr table; ASTPtr columns; ASTPtr format; ASTPtr select; ASTPtr table_function; /// Insertion data const char * data = nullptr; if (!s_insert_into.ignore(pos, expected)) return false; s_table.ignore(pos, expected); if (s_function.ignore(pos, expected)) { if (!table_function_p.parse(pos, table_function, expected)) return false; } else { if (!name_p.parse(pos, table, expected)) return false; if (s_dot.ignore(pos, expected)) { database = table; if (!name_p.parse(pos, table, expected)) return false; } } /// Is there a list of columns if (s_lparen.ignore(pos, expected)) { if (!columns_p.parse(pos, columns, expected)) return false; if (!s_rparen.ignore(pos, expected)) return false; } Pos before_select = pos; /// VALUES or FORMAT or SELECT if (s_values.ignore(pos, expected)) { data = pos->begin; } else if (s_format.ignore(pos, expected)) { auto name_pos = pos; if (!name_p.parse(pos, format, expected)) return false; data = name_pos->end; if (data < end && *data == ';') throw Exception("You have excessive ';' symbol before data for INSERT.\n" "Example:\n\n" "INSERT INTO t (x, y) FORMAT TabSeparated\n" ";\tHello\n" "2\tWorld\n" "\n" "Note that there is no ';' just after format name, " "you need to put at least one whitespace symbol before the data.", ErrorCodes::SYNTAX_ERROR); while (data < end && (*data == ' ' || *data == '\t' || *data == '\f')) ++data; /// Data starts after the first newline, if there is one, or after all the whitespace characters, otherwise. if (data < end && *data == '\r') ++data; if (data < end && *data == '\n') ++data; } else if (s_select.ignore(pos, expected) || s_with.ignore(pos,expected)) { pos = before_select; ParserSelectWithUnionQuery select_p; select_p.parse(pos, select, expected); } else { return false; } auto query = std::make_shared<ASTInsertQuery>(); node = query; if (table_function) { query->table_function = table_function; } else { getIdentifierName(database, query->database); getIdentifierName(table, query->table); } getIdentifierName(format, query->format); query->columns = columns; query->select = select; query->data = data != end ? data : nullptr; query->end = end; if (columns) query->children.push_back(columns); if (select) query->children.push_back(select); return true; }
bool ParserInsertQuery::parseImpl(Pos & pos, Pos end, ASTPtr & node, Pos & max_parsed_pos, Expected & expected) { Pos begin = pos; ParserWhitespaceOrComments ws; ParserKeyword s_insert_into("INSERT INTO"); ParserKeyword s_dot("."); ParserKeyword s_values("VALUES"); ParserKeyword s_format("FORMAT"); ParserKeyword s_select("SELECT"); ParserKeyword s_lparen("("); ParserKeyword s_rparen(")"); ParserIdentifier name_p; ParserList columns_p(std::make_unique<ParserCompoundIdentifier>(), std::make_unique<ParserString>(","), false); ASTPtr database; ASTPtr table; ASTPtr columns; ASTPtr format; ASTPtr select; /// Insertion data const char * data = nullptr; ws.ignore(pos, end); if (!s_insert_into.ignore(pos, end, max_parsed_pos, expected)) return false; ws.ignore(pos, end); if (!name_p.parse(pos, end, table, max_parsed_pos, expected)) return false; ws.ignore(pos, end); if (s_dot.ignore(pos, end, max_parsed_pos, expected)) { database = table; if (!name_p.parse(pos, end, table, max_parsed_pos, expected)) return false; ws.ignore(pos, end); } ws.ignore(pos, end); /// Is there a list of columns if (s_lparen.ignore(pos, end, max_parsed_pos, expected)) { ws.ignore(pos, end); if (!columns_p.parse(pos, end, columns, max_parsed_pos, expected)) return false; ws.ignore(pos, end); if (!s_rparen.ignore(pos, end, max_parsed_pos, expected)) return false; } ws.ignore(pos, end); Pos before_select = pos; /// VALUES or FORMAT or SELECT if (s_values.ignore(pos, end, max_parsed_pos, expected)) { ws.ignore(pos, end); data = pos; pos = end; } else if (s_format.ignore(pos, end, max_parsed_pos, expected)) { ws.ignore(pos, end); if (!name_p.parse(pos, end, format, max_parsed_pos, expected)) return false; /// Data starts after the first newline, if there is one, or after all the whitespace characters, otherwise. ParserWhitespaceOrComments ws_without_nl(false); ws_without_nl.ignore(pos, end); if (pos != end && *pos == ';') throw Exception("You have excessive ';' symbol before data for INSERT.\n" "Example:\n\n" "INSERT INTO t (x, y) FORMAT TabSeparated\n" "1\tHello\n" "2\tWorld\n" "\n" "Note that there is no ';' in first line.", ErrorCodes::SYNTAX_ERROR); if (pos != end && *pos == '\n') ++pos; data = pos; pos = end; } else if (s_select.ignore(pos, end, max_parsed_pos, expected)) { pos = before_select; ParserSelectQuery select_p; select_p.parse(pos, end, select, max_parsed_pos, expected); } else { expected = "VALUES or FORMAT or SELECT"; return false; } auto query = std::make_shared<ASTInsertQuery>(StringRange(begin, data ? data : pos)); node = query; if (database) query->database = typeid_cast<ASTIdentifier &>(*database).name; query->table = typeid_cast<ASTIdentifier &>(*table).name; if (format) query->format = typeid_cast<ASTIdentifier &>(*format).name; query->columns = columns; query->select = select; query->data = data != end ? data : NULL; query->end = end; if (columns) query->children.push_back(columns); if (select) query->children.push_back(select); return true; }