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LibSQL: Fix handling of optional AS keywords

In some syntaxes, using the 'AS' keyword to define an alias is optional.
But if it does appear, an identifier better appear afterwards.
This commit is contained in:
Timothy Flynn 2021-04-23 12:02:51 -04:00 committed by Andreas Kling
parent c1345bda3e
commit 6a69b8efa7
2 changed files with 10 additions and 11 deletions

View file

@ -822,11 +822,9 @@ NonnullRefPtr<ReturningClause> Parser::parse_returning_clause()
do {
auto expression = parse_expression();
consume_if(TokenType::As); // 'AS' is optional.
String column_alias;
if (match(TokenType::Identifier))
column_alias = consume().value();
if (consume_if(TokenType::As) || match(TokenType::Identifier))
column_alias = consume(TokenType::Identifier).value();
columns.append({ move(expression), move(column_alias) });
if (!match(TokenType::Comma))
@ -860,11 +858,10 @@ NonnullRefPtr<ResultColumn> Parser::parse_result_column()
auto expression = table_name.is_null()
? parse_expression()
: static_cast<NonnullRefPtr<Expression>>(*parse_column_name_expression(move(table_name), parsed_period));
consume_if(TokenType::As); // 'AS' is optional.
String column_alias;
if (match(TokenType::Identifier))
column_alias = consume().value();
if (consume_if(TokenType::As) || match(TokenType::Identifier))
column_alias = consume(TokenType::Identifier).value();
return create_ast_node<ResultColumn>(move(expression), move(column_alias));
}
@ -884,11 +881,9 @@ NonnullRefPtr<TableOrSubquery> Parser::parse_table_or_subquery()
table_name = move(schema_or_table_name);
}
consume_if(TokenType::As); // 'AS' is optional.
String table_alias;
if (match(TokenType::Identifier))
table_alias = consume().value();
if (consume_if(TokenType::As) || match(TokenType::Identifier))
table_alias = consume(TokenType::Identifier).value();
return create_ast_node<TableOrSubquery>(move(schema_name), move(table_name), move(table_alias));
}