Find an internal Postgres function

find-internal-function.md

I saw a use of the internal function glob(text) and couldn't find anything about it in the docs.

Thanks to https://gist.github.com/ianpgall/9492728#file-postgres-view-functions-sql:

> select * from showfunctions where function_definition ~ 'glob';
+---------+----------------------------+---------------------------------------------------------+
| lanname | function_definition        | source                                                  |
+---------+----------------------------+---------------------------------------------------------+
| plpgsql | text = internal.glob(text) | \n\n                                                    |
|         |                            | declare                                                 |
|         |                            |     output_pattern text;                                |
|         |                            | begin                                                   |
|         |                            |     output_pattern = replace(input_glob, '*', '%');     |
|         |                            |     output_pattern = replace(output_pattern, '?', '_'); |
|         |                            |     return output_pattern;                              |
|         |                            | end;                                                    |
|         |                            | \n\n                                                    |
+---------+----------------------------+---------------------------------------------------------+