SQLFilter incorrect results when WHERE clause contains OR expression

When using an SQLFilter, if applied to a query that contains only OR expressions in the WHERE clause, the generated SQL is incorrect.

Example:

• SQLFilter returns a constraint like "{$tableAlias}.accountid={$accountId}"
• Query: "SELECT u FROM User u WHERE u.fname='bob' OR u.lname='bob'"

Resulting SQL:
"SELECT u FROM User u WHERE u.fname='bob' OR u.lname='bob' AND u.accountid=2"

Expected:
"SELECT u FROM User u WHERE (u.fname='bob' OR u.lname='bob') AND u.accountid=2"

The problem is that the order of operations is wrong. I'm getting users who aren't in account 2, making SQLFilter unreliable.