pub fn get_metadata_field_id(column_name: &str) -> Result<i32>Expand description
Returns the field ID for a metadata column name.
This maps every reserved name to its field id, including the position-delete-file
internal columns pos and file_path, which are not _-prefixed. It is therefore
not a membership test for data-table metadata columns: get_metadata_field_id("pos")
returns Ok even though pos is a valid user data column name. To decide whether a
name is a projectable data-table metadata column, use is_metadata_column_name.
§Arguments
column_name- The metadata column name
§Returns
The field ID of the metadata column, or an error if the column name is not recognized