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##### metadata::original_column_name

Returns the original (physical) name of the column.

###### Synopsis

    string_view
    original_column_name() const noexcept;

###### Description

E.g. in `"SELECT id AS employee_id FROM employees"`, `original_column_name()` will be `"id"`.

This is optional information - it won't be populated unless the connection executing the query has `meta_mode() == metadata_mode::full`.

###### Exception safety

No-throw guarantee.

###### Object lifetimes

The returned reference is valid as long as `*this` is alive and hasn't been assigned to or moved from.