Avoid using a feature not supported in PHP5.3
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@ -21,9 +21,10 @@ class Provider extends AbstractProvider
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* lest we leave the query builder in a bad state for fetchSlice().
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*/
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$qb = clone $queryBuilder;
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$rootAliases = $queryBuilder->getRootAliases();
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return $qb
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->select($qb->expr()->count($queryBuilder->getRootAliases()[0]))
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->select($qb->expr()->count($rootAliases[0]))
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// Remove ordering for efficiency; it doesn't affect the count
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->resetDQLPart('orderBy')
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->getQuery()
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