Re: BUG #14688: Wrong results in LIKE operation on JSON Type

nblxa(at)mail(dot)ru writes:
> When JSON contains '\\' symbol, then operator '=' works well, but operator
> 'LIKE' return wrong result.

> SELECT '{"Name":"Domen\\Ivan"}'::json ->> 'Name' = 'Domen\Ivan'; -- yields
> true

> SELECT '{"Name":"Domen\\Ivan"}'::json ->> 'Name' LIKE 'Domen\Ivan'; --
> yields false

> SELECT '{"Name":"Domen\\Ivan"}'::json ->> 'Name' LIKE 'Domen\\Ivan'; --
> yields true

I think you've forgotten that backslash is an escape character in LIKE
patterns. You could use ... LIKE 'Domen\Ivan' ESCAPE '' if you don't
want that behavior.

https://www.postgresql.org/docs/current/static/functions-matching.html#FUNCTIONS-LIKE

regards, tom lane