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Tomáš Trávníček
doctrine-dbal
Commits
e647cdbb
Commit
e647cdbb
authored
Sep 29, 2007
by
zYne
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introduction.txt
.../new/docs/en/dql-doctrine-query-language/introduction.txt
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manual/new/docs/en/dql-doctrine-query-language/introduction.txt
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e647cdbb
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@@ -10,32 +10,36 @@ When compared to using raw SQL, DQL has several benefits:
...
@@ -10,32 +10,36 @@ When compared to using raw SQL, DQL has several benefits:
If the power of DQL isn't enough, you should consider using the rawSql API for object population.
If the power of DQL isn't enough, you should consider using the rawSql API for object population.
You may already be familiar with the following syntax:
<code type="php">
<code type="php">
// DO NOT USE THE FOLLOWING CODE
// DO NOT USE THE FOLLOWING CODE
// (us
ing many sql queries for object population):
// (us
es many sql queries for object population)
$users = $conn->getTable('User')->findAll();
$users = $conn->getTable('User')->findAll();
foreach($users as $user) {
foreach($users as $user) {
print $user->name
."
print $user->name
. ' has phonenumbers: ';
";
foreach($user->Phonenumber as $phonenumber) {
foreach($user->Phonenumber as $phonenumber) {
print $phonenumber."
print $phonenumber . ' ';
";
}
}
}
}
<code>
However you should not use it. Above is the same behaviour implemented much more efficiently:
// same thing implemented much more efficiently:
<code type="php">
// same thing implemented much more efficiently:
// (using only one sql query for object population)
// (using only one sql query for object population)
$users = $conn->query(
"FROM User.Phonenumber"
);
$users = $conn->query(
'FROM User u LEFT JOIN u.Phonenumber p'
);
foreach($users as $user) {
foreach($users as $user) {
print $user->name
."
print $user->name
. ' has phonenumbers: ';
";
foreach($user->Phonenumber as $phonenumber) {
foreach($user->Phonenumber as $phonenumber) {
print $phonenumber."
print $phonenumber . ' ';
";
}
}
}
}
</code>
</code>
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