doctrine2/manual/docs/DQL (Doctrine Query Language) - Conditional expressions - Operators and operator precedence.php

The operators are listed below in order of decreasing precedence.
<ul>
<li \> Navigation operator (.)
<li \> Arithmetic operators: <br \>
+, - unary <br \>
*, / multiplication and division <br \>
+, - addition and subtraction <br \>
<li \> Comparison operators : =, >, >=, <, <=, <> (not equal), [NOT] LIKE, <br \>
[NOT] IN, IS [NOT] NULL, IS [NOT] EMPTY <br \>
<li \> Logical operators:<br \>
NOT <br \>
AND <br \>
OR  <br \>
</ul>