[Sqlalchemy-tickets] Issue #3799: equal and not-equal operators should not be associative (zzzeek/sqlalchemy)

[John P. <iss...@bi...>]

New issue 3799: equal and not-equal operators should not be associative
https://bitbucket.org/zzzeek/sqlalchemy/issues/3799/equal-and-not-equal-operators-should-not

John Passaro:

Example
```
#!python

from sqlalchemy import literal
eq_stmt = (literal(1) == 1) == (literal(1) == 0)
ne_stmt = (literal(1) != 1) != (literal(1) != 0)
print eq_stmt; print ne_stmt
```
output:
```
:param_1 = :param_2 = :param_3 = :param_4
:param_1 != :param_2 != :param_3 != :param_4
```
Expect:
```
(:param_1 = :param_2) = (:param_3 = :param_4)
(:param_1 != :param_2) != (:param_3 != :param_4)
```

See PR (including test case) at https://gerrit.sqlalchemy.org/#/c/190/, and discussion on original PR at https://github.com/zzzeek/sqlalchemy/pull/308.

Not high priority as far as the reporter is concerned, it is easy to work around.