PostgreSQL Bugs

Collected from the PG bugs email list.

Bug ID15421
PG Version9.4.19
OSLinux (4.9.0-4-amd64 #1 SMP Debian 4.9.65-3+deb9u)
Opened2018-10-05 13:11:43+00
Reported byPavel Shapovalov
StatusOpen

Body of first available message related to this bug follows.

The following bug has been logged on the website:

Bug reference:      15421
Logged by:          Pavel Shapovalov
Email address:      (redacted)
PostgreSQL version: 9.4.19
Operating system:   Linux (4.9.0-4-amd64 #1 SMP Debian 4.9.65-3+deb9u)
Description:        

Schema:
CREATE TABLE public.tmp (
    id integer NOT NULL,
    name text
);

Test data:
INSERT INTO tmp VALUES(1, 'test')

If I try to query the table with LIKE statement:
SELECT COUNT(id) AS "records_found" FROM "tmp" WHERE lower("tmp"."name")
LIKE 't\' I get the error "Error: LIKE pattern must not end with escape
character". The same situation is for statement SELECT COUNT(id) AS
"records_found" FROM "tmp" WHERE lower("tmp"."name") LIKE 'te\' and others
if the LIKE pattern matches the beginning of the name field in any record.

If I try to query the statement SELECT COUNT(id) AS "records_found" FROM
"tmp" WHERE lower("tmp"."name") LIKE 'rs\' and others that do not match any
records, there are no errors at all.

This behaviour is not clear from the documentation. Is it a bug or
undocumented feature?

Messages

DateAuthorSubject
2018-10-05 13:11:43+00=?utf-8?q?PG_Bug_reporting_form?=BUG #15421: Error: LIKE pattern must not end with escape character
2018-10-05 14:08:57+00Tom LaneRe: BUG #15421: Error: LIKE pattern must not end with escape character