Re: [BUGS] BUG #14512: Backslashes in LIKE - Mailing list pgsql-bugs

2017-01-24 19:15 GMT+01:00 David G. Johnston <david.g.johnston@gmail.com>:
>
> Then consider a feature request that a malformed pattern be detected and fail independent of the data being checked.
Suchnon-deterministic failure is at least a POLA violation and makes what should be a basically compile-time error into
arun-time one.
 

This is not pure compile-time "error" as pattern in LIKE could be
dynamic expression, for example:

root=# create table t (a varchar);
CREATE TABLE

root=# insert into t values ('\\\');
INSERT 0 1

root=# select * from t t1 cross join t t2 where t1.a like t2.a;
ERROR:  LIKE pattern must not end with escape character


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