Method parse_optional_table_alias

src/sql-parser/src/parser.rs:7220–7232

Parse `AS identifier` when the AS is describing a table-valued object, like in `... FROM generate_series(1, 10) AS t (col)`. In this case the alias is allowed to optionally name the columns in the table, in addition to the table itself.

(&mut self)

    /// the alias is allowed to optionally name the columns in the table, in
    /// addition to the table itself.
    fn parse_optional_table_alias(&mut self) -> Result<Option<TableAlias>, ParserError> {
        match self.parse_optional_alias(Keyword::is_reserved_in_table_alias)? {
            Some(name) => {
                let columns = self.parse_parenthesized_column_list(Optional)?;
                Ok(Some(TableAlias {
                    name,
                    columns,
                    strict: false,
                }))
            }
            None => Ok(None),
        }
    }

    fn parse_deferred_item_name(&mut self) -> Result<DeferredItemName<Raw>, ParserError> {
        Ok(match self.parse_raw_name()? {