The following bug has been logged on the website:
Bug reference: 17407
Logged by: trim combined with substring from pattern for gives inconsistent output
Email address: unmesh.joshi126@gmail.com
PostgreSQL version: 12.4
Operating system: Linux 5.15.4-051504-generic
Description:
Expected output
demo=# select trim ('nextval(''' from
substring('nextval(''database_table_id_seq''::regclass)' from
'%#"%_id_seq#"%' for '#' ));
btrim
-----------------------
database_table_id_seq
(1 row)
Unexpected output
demo=# select trim ('nextval(''' from
substring('nextval(''auth_table_id_seq''::regclass)' from '%#"%_id_seq#"%'
for '#' ));
btrim
------------------
uth_table_id_seq
(1 row)