26 lines
862 B
PHP
26 lines
862 B
PHP
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<code type="php">
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/**
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* lets presume $users contains a collection of users
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* each having 0-1 email and 0-* phonenumbers
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*/
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$users->delete();
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/**
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* On connection drivers other than mysql doctrine would now perform three queries
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* regardless of how many users, emails and phonenumbers there are
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*
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* the queries would look something like:
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* DELETE FROM entity WHERE entity.id IN (1,2,3, ... ,15)
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* DELETE FROM phonenumber WHERE phonenumber.id IN (4,6,7,8)
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* DELETE FROM email WHERE email.id IN (1,2, ... ,10)
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*
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* On mysql doctrine is EVEN SMARTER! Now it would perform only one query!
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* the query would look like:
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* DELETE entity, email, phonenumber FROM entity
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* LEFT JOIN phonenumber ON entity.id = phonenumber.entity_id, email
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* WHERE (entity.email_id = email.id) && (entity.id IN(4, 5, 6, 7, 8, 9, 10, 11)) && (entity.type = 0)
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*/
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</code>
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