Split a string into rows using pure SQLite

Question

Using SQLite, I\'d like to split a string in the following way.

Input string:

C:\\Users\\fidel\\Desktop\\Temp

and have

Answer 1

Inspired from Lukasz Szozda's answer:

 WITH RECURSIVE cte("pre","post") AS (   
   VALUES('C:', 'Users\fidel\Desktop\Temp' || '\')
 UNION ALL
   SELECT "pre" || '\' || left("post",     position('\' in "post")-1),
                     substring("post" from position('\' in "post")+1)
   FROM cte   
   WHERE "post" > ''                             
 ) 
 SELECT "pre" FROM cte

(tested on PostgreSQL)

The idea is now to replace the VALUES line

VALUES('C:', 'Users\fidel\Desktop\Temp' || '\')

with placeholders like

 VALUES(?, ? || '\')

which have been pre-split in the programming language that is going to run the SQL statement above against the data base.

Reading the SQLite docs, I see that substring(... from ...) has to be replaced by substr(..., ...) and position(... in ...) is to be replaced by instr(..., ...) with parameters swapped.

Very annoying for me since I wanted SQL code that runs on both PostgreSQL and SQLite.