[BUGS] BUG #14688: Wrong results in LIKE operation on JSON Type

The following bug has been logged on the website:

Bug reference:      14688
Logged by:          Ilya Kopylov
Email address:      nblxa@mail.ru
PostgreSQL version: 9.6.0
Operating system:   Windows 8.1
Description:

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

When I search with 'LIKE' operator and adding '\' symbol, when got result. I
think whis is bug.


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