Doctrine_manual-1-2-en

Chapter 9: DQL (Doctrine Query Language) 138
NOT
AND
OR
In expressions
Syntax:
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IN (|)
An IN conditional expression returns true if the operand is found from result of the subquery
or if its in the specificied comma separated value list, hence the IN expression is always false
if the result of the subquery is empty.
When value list is being used there must be at least one element in that list.
Here is an example where we use a subquery for the IN:
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// test.php
// ...
$q = Doctrine_Query::create()
->from('User u')
->where('u.id 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:
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SELECT
u.id AS u__id
FROM user u
WHERE u.id 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 = ?)
Here is an example where we just use a list of integers:
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// test.php
// ...
$q = Doctrine_Query::create()
->select('u.id')
->from('User u')
->whereIn('u.id', array(1, 3, 4, 5));
echo $q->getSqlQuery();
The above call to getSql() would output the following SQL query:
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SELECT
u.id AS u__id
FROM user u
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