Case insensitive like

lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php

@@ -97,6 +97,7 @@ class BasicEntityPersister implements EntityPersister
         Comparison::IN          => 'IN (%s)',
         Comparison::NIN         => 'NOT IN (%s)',
         Comparison::CONTAINS    => 'LIKE %s',
+        Comparison::ICONTAINS   => 'LIKE %s',
         Comparison::STARTS_WITH => 'LIKE %s',
         Comparison::ENDS_WITH   => 'LIKE %s',
     ];
@@ -1616,6 +1617,10 @@ public function getSelectConditionStatementSQL($field, $value, $assoc = null, $c
                     continue;
                 }
 
+                if ($comparison === Comparison::ICONTAINS) {
+                    $column = $this->platform->getLowerExpression($column);
+                }
+
                 $selectedColumns[] = $column . ' ' . sprintf(self::$comparisonMap[$comparison], $placeholder);
 
                 continue;

lib/Doctrine/ORM/Persisters/SqlValueVisitor.php

@@ -115,6 +115,9 @@ protected function getValueFromComparison(Comparison $comparison)
             case Comparison::CONTAINS:
                 return "%{$value}%";
 
+            case Comparison::ICONTAINS:
+                return '%' . mb_strtolower($value) . '%';
+
             case Comparison::STARTS_WITH:
                 return "{$value}%";
 

lib/Doctrine/ORM/Query/QueryExpressionVisitor.php

@@ -185,6 +185,11 @@ public function walkComparison(Comparison $comparison)
                 $parameter->setValue('%' . $parameter->getValue() . '%', $parameter->getType());
                 $this->parameters[] = $parameter;
 
+                return $this->expr->like($field, $placeholder);
+            case Comparison::ICONTAINS:
+                $parameter->setValue('%' . mb_strtolower($parameter->getValue()) . '%', $parameter->getType());
+                $this->parameters[] = $parameter;
+
                 return $this->expr->like($field, $placeholder);
             case Comparison::STARTS_WITH:
                 $parameter->setValue($parameter->getValue() . '%', $parameter->getType());

tests/Doctrine/Tests/ORM/Functional/EntityRepositoryCriteriaTest.php

@@ -183,4 +183,34 @@ public function testCanContainsWithoutLoadingCollection()
 
         $this->assertFalse($tweets->isInitialized());
     }
+
+    public function testCanIContainsWithoutLoadingCollection()
+    {
+        $user = new User();
+        $user->name = 'Marco';
+        $this->_em->persist($user);
+        $this->_em->flush();
+
+        $tweet = new Tweet();
+        $tweet->author = $user;
+        $tweet->content = 'Criteria is awesome';
+        $this->_em->persist($tweet);
+        $this->_em->flush();
+
+        $this->_em->clear();
+
+        $criteria = new Criteria();
+        $criteria->andWhere($criteria->expr()->iContains('content', 'criteria'));
+
+        $user   = $this->_em->find(User::class, $user->id);
+        $tweets = $user->tweets->matching($criteria);
+
+        $this->assertInstanceOf(LazyCriteriaCollection::class, $tweets);
+        $this->assertFalse($tweets->isInitialized());
+
+        $tweets->contains($tweet);
+        $this->assertTrue($tweets->contains($tweet));
+
+        $this->assertFalse($tweets->isInitialized());
+    }
 }

tests/Doctrine/Tests/ORM/Functional/EntityRepositoryTest.php

@@ -910,6 +910,22 @@ public function testMatchingCriteriaContainsComparison()
         $this->assertEquals(2, count($users));
     }
 
+    public function testMatchingCriteriaIContainsComparison()
+    {
+        $this->loadFixture();
+
+        $repository = $this->_em->getRepository(CmsUser::class);
+
+        $users = $repository->matching(new Criteria(Criteria::expr()->iContains('name', 'foobar')));
+        $this->assertEquals(0, count($users));
+
+        $users = $repository->matching(new Criteria(Criteria::expr()->iContains('name', 'rOm')));
+        $this->assertEquals(1, count($users));
+
+        $users = $repository->matching(new Criteria(Criteria::expr()->iContains('status', 'DEV')));
+        $this->assertEquals(2, count($users));
+    }
+
     public function testMatchingCriteriaStartsWithComparison()
     {
         $this->loadFixture();

tests/Doctrine/Tests/ORM/Query/QueryExpressionVisitorTest.php

@@ -67,6 +67,7 @@ public function comparisonData()
             [$cb->notIn('field', ['value']), $qb->notIn('o.field', ':field'), new Parameter('field', ['value'])],
 
             [$cb->contains('field', 'value'), $qb->like('o.field', ':field'), new Parameter('field', '%value%')],
+            [$cb->iContains('field', 'value'), $qb->like('o.field', ':field'), new Parameter('field', '%value%')],
 
             [$cb->startsWith('field', 'value'), $qb->like('o.field', ':field'), new Parameter('field', 'value%')],
             [$cb->endsWith('field', 'value'), $qb->like('o.field', ':field'), new Parameter('field', '%value')],