Doctrine_manual-1-2-en

Chapter 9: DQL (Doctrine Query Language) 146
Listing
9-115
which the search is started (by default, the beginning of the string to be searched). The first
position in a string is denoted by 1. If the string is not found, 0 is returned.
The LENGTH function returns the length of the string in characters as an integer.
Arithmetic functions
Availible DQL arithmetic functions:
ABS(simple_arithmetic_expression)
SQRT(simple_arithmetic_expression)
MOD(simple_arithmetic_expression, simple_arithmetic_expression)
• The ABS function returns the absolute value for given number.
• The SQRT function returns the square root for given number.
• The MOD function returns the modulus of first argument using the second
argument.
Subqueries
Introduction
Doctrine allows you to use sub-dql queries in the FROM, SELECT and WHERE statements.
Below you will find examples for all the different types of subqueries Doctrine supports.
Comparisons using subqueries
Find all the users which are not in a specific group.
Listing
9-116
// test.php
Listing
9-117
// ...
$q = Doctrine_Query::create()
->select('u.id')
->from('User u')
->where('u.id NOT IN (SELECT u.id FROM User u INNER JOIN u.Groups g
WHERE g.id = ?)', 1);
echo $q->getSqlQuery();
The above call to getSql() would output the following SQL query:
SELECT
u.id AS u__id
FROM user u
WHERE u.id NOT IN (SELECT
u2.id AS u2__id
FROM user u2
INNER JOIN user_group u3 ON u2.id = u3.user_id
INNER JOIN groups g ON g.id = u3.group_id
WHERE g.id = ?)
Retrieve the users phonenumber in a subquery and include it in the resultset of user
information.
----------------- Brought to you by