Can not create valid oracle regexp constraint using knex

[felczukr]

Environment

Knex version: 0.20.13
Database + version: oracle 18, oracledb: 4.2.0
OS: macOs High Sierra
@atiertant

Bug

I'm trying to create the constraint with regexp using knex on the oracle database. Knex creates the constraint on the oracle column but it replaces "?" with placeholder like ":1", ":2". I tried to replace the question mark (according to documentation) with "?". It doesn't work for me on oracle db. Here is an example of oracle column constraint
knex.raw('ALTER TABLE atest ADD CONSTRAINT C_TEST CHECK (REGEXP_LIKE(COL_A, \'^((([A]{0,4})WW)|(W{0,2}))\\?([B]{5}WW)+((([C]{5})W\\?))$\'))');
Instead of mentioned regexp in the database I see:
^((([A]{0,4})WW)|(W{0,2})):1([B]{5}WW)+((([C]{5})W:2))$

I read the documentation and the suggested solution to escape the question \? mark doesn't work for me.

[elhigu]

Ah you actually had made a bug report. There seems to be a bug in escaping for oracle https://runkit.com/embed/qlo6re5ixn4s