Fixed quoting of string literals containing backslash

lib/Doctrine/DBAL/Platforms/OraclePlatform.php

@@ -21,7 +21,6 @@ use function func_num_args;
 use function implode;
 use function preg_match;
 use function sprintf;
-use function str_replace;
 use function strlen;
 use function strpos;
 use function strtoupper;
@@ -1175,14 +1174,4 @@ SQL
     {
         return 'BLOB';
     }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function quoteStringLiteral($str)
-    {
-        $str = str_replace('\\', '\\\\', $str); // Oracle requires backslashes to be escaped aswell.
-
-        return parent::quoteStringLiteral($str);
-    }
 }

lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php

@@ -28,7 +28,6 @@ use function is_bool;
 use function is_numeric;
 use function is_string;
 use function sprintf;
-use function str_replace;
 use function strpos;
 use function strtolower;
 use function trim;
@@ -1199,16 +1198,6 @@ SQL
         return 'BYTEA';
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function quoteStringLiteral($str)
-    {
-        $str = str_replace('\\', '\\\\', $str); // PostgreSQL requires backslashes to be escaped aswell.
-
-        return parent::quoteStringLiteral($str);
-    }
-
     /**
      * {@inheritdoc}
      */

tests/Doctrine/Tests/DBAL/Functional/Platform/QuotingTest.php

+<?php
+
+namespace Doctrine\Tests\DBAL\Functional\Platform;
+
+use Doctrine\Tests\DbalFunctionalTestCase;
+
+class QuotingTest extends DbalFunctionalTestCase
+{
+    /**
+     * @dataProvider stringLiteralProvider
+     */
+    public function testQuoteStringLiteral(string $string) : void
+    {
+        $platform = $this->connection->getDatabasePlatform();
+        $query    = $platform->getDummySelectSQL(
+            $platform->quoteStringLiteral($string)
+        );
+
+        self::assertSame($string, $this->connection->fetchColumn($query));
+    }
+
+    /**
+     * @return mixed[][]
+     */
+    public static function stringLiteralProvider() : iterable
+    {
+        return [
+            'backslash' => ['\\'],
+            'single-quote' => ["'"],
+        ];
+    }
+}

tests/Doctrine/Tests/DBAL/Platforms/AbstractPostgreSqlPlatformTestCase.php

@@ -952,7 +952,7 @@ abstract class AbstractPostgreSqlPlatformTestCase extends AbstractPlatformTestCa
      */
     public function testQuotesTableNameInListTableForeignKeysSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->platform->getListTableForeignKeysSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->platform->getListTableForeignKeysSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -961,7 +961,7 @@ abstract class AbstractPostgreSqlPlatformTestCase extends AbstractPlatformTestCa
     public function testQuotesSchemaNameInListTableForeignKeysSQL()
     {
         self::assertContains(
-            "'Foo''Bar\\\\'",
+            "'Foo''Bar\\'",
             $this->platform->getListTableForeignKeysSQL("Foo'Bar\\.baz_table"),
             '',
             true
@@ -973,7 +973,7 @@ abstract class AbstractPostgreSqlPlatformTestCase extends AbstractPlatformTestCa
      */
     public function testQuotesTableNameInListTableConstraintsSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->platform->getListTableConstraintsSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->platform->getListTableConstraintsSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -981,7 +981,7 @@ abstract class AbstractPostgreSqlPlatformTestCase extends AbstractPlatformTestCa
      */
     public function testQuotesTableNameInListTableIndexesSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->platform->getListTableIndexesSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->platform->getListTableIndexesSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -990,7 +990,7 @@ abstract class AbstractPostgreSqlPlatformTestCase extends AbstractPlatformTestCa
     public function testQuotesSchemaNameInListTableIndexesSQL()
     {
         self::assertContains(
-            "'Foo''Bar\\\\'",
+            "'Foo''Bar\\'",
             $this->platform->getListTableIndexesSQL("Foo'Bar\\.baz_table"),
             '',
             true
@@ -1002,7 +1002,7 @@ abstract class AbstractPostgreSqlPlatformTestCase extends AbstractPlatformTestCa
      */
     public function testQuotesTableNameInListTableColumnsSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->platform->getListTableColumnsSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->platform->getListTableColumnsSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -1011,7 +1011,7 @@ abstract class AbstractPostgreSqlPlatformTestCase extends AbstractPlatformTestCa
     public function testQuotesSchemaNameInListTableColumnsSQL()
     {
         self::assertContains(
-            "'Foo''Bar\\\\'",
+            "'Foo''Bar\\'",
             $this->platform->getListTableColumnsSQL("Foo'Bar\\.baz_table"),
             '',
             true
@@ -1024,7 +1024,7 @@ abstract class AbstractPostgreSqlPlatformTestCase extends AbstractPlatformTestCa
     public function testQuotesDatabaseNameInCloseActiveDatabaseConnectionsSQL()
     {
         self::assertContains(
-            "'Foo''Bar\\\\'",
+            "'Foo''Bar\\'",
             $this->platform->getCloseActiveDatabaseConnectionsSQL("Foo'Bar\\"),
             '',
             true

tests/Doctrine/Tests/DBAL/Platforms/OraclePlatformTest.php

@@ -875,7 +875,7 @@ SQL
      */
     public function testQuotesDatabaseNameInListSequencesSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->platform->getListSequencesSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->platform->getListSequencesSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -883,7 +883,7 @@ SQL
      */
     public function testQuotesTableNameInListTableIndexesSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->platform->getListTableIndexesSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->platform->getListTableIndexesSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -891,7 +891,7 @@ SQL
      */
     public function testQuotesTableNameInListTableForeignKeysSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->platform->getListTableForeignKeysSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->platform->getListTableForeignKeysSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -899,7 +899,7 @@ SQL
      */
     public function testQuotesTableNameInListTableConstraintsSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->platform->getListTableConstraintsSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->platform->getListTableConstraintsSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -907,7 +907,7 @@ SQL
      */
     public function testQuotesTableNameInListTableColumnsSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->platform->getListTableColumnsSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->platform->getListTableColumnsSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -915,6 +915,6 @@ SQL
      */
     public function testQuotesDatabaseNameInListTableColumnsSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->platform->getListTableColumnsSQL('foo_table', "Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->platform->getListTableColumnsSQL('foo_table', "Foo'Bar\\"), '', true);
     }
 }