From 8c41da97a63f0a970f97d4593de68736f0b65436 Mon Sep 17 00:00:00 2001
From: Sergei Morozov <morozov@tut.by>
Date: Sat, 14 Apr 2018 10:06:15 -0700
Subject: [PATCH] Allow to specify arbitrary SQL expression in
 AbstractPlatform::getDummySelectSQL()

For testing purposes and not only, it may be needed to evaluate an arbitrary SQL expression (see https://github.com/doctrine/dbal/pull/3013, https://github.com/doctrine/dbal/pull/3108). Instead of doing `str_replace()` on an expected string, one could specify the expression explicitly.
---
 .../DBAL/Platforms/AbstractPlatform.php       |  6 +++++-
 lib/Doctrine/DBAL/Platforms/DB2Platform.php   |  6 +++++-
 .../DBAL/Platforms/OraclePlatform.php         |  6 +++++-
 .../Functional/LikeWildcardsEscapingTest.php  | 20 +++++++++----------
 4 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php b/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
index daf6b8528f4..1a75872b354 100644
--- a/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
@@ -49,7 +49,9 @@
 use function array_values;
 use function count;
 use function explode;
+use function func_get_arg;
 use function func_get_args;
+use function func_num_args;
 use function get_class;
 use function implode;
 use function in_array;
@@ -3499,7 +3501,9 @@ public function getTruncateTableSQL($tableName, $cascade = false)
      */
     public function getDummySelectSQL()
     {
-        return 'SELECT 1';
+        $expression = func_num_args() > 0 ? func_get_arg(0) : '1';
+
+        return sprintf('SELECT %s', $expression);
     }
 
     /**
diff --git a/lib/Doctrine/DBAL/Platforms/DB2Platform.php b/lib/Doctrine/DBAL/Platforms/DB2Platform.php
index df2faab440d..87288689a74 100644
--- a/lib/Doctrine/DBAL/Platforms/DB2Platform.php
+++ b/lib/Doctrine/DBAL/Platforms/DB2Platform.php
@@ -30,6 +30,8 @@
 use function count;
 use function current;
 use function explode;
+use function func_get_arg;
+use function func_num_args;
 use function implode;
 use function sprintf;
 use function strpos;
@@ -863,7 +865,9 @@ public function getForUpdateSQL()
      */
     public function getDummySelectSQL()
     {
-        return 'SELECT 1 FROM sysibm.sysdummy1';
+        $expression = func_num_args() > 0 ? func_get_arg(0) : '1';
+
+        return sprintf('SELECT %s FROM sysibm.sysdummy1', $expression);
     }
 
     /**
diff --git a/lib/Doctrine/DBAL/Platforms/OraclePlatform.php b/lib/Doctrine/DBAL/Platforms/OraclePlatform.php
index 1abc6cba108..fcb3d671aa8 100644
--- a/lib/Doctrine/DBAL/Platforms/OraclePlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/OraclePlatform.php
@@ -31,6 +31,8 @@
 use function array_merge;
 use function count;
 use function explode;
+use function func_get_arg;
+use function func_num_args;
 use function implode;
 use function preg_match;
 use function sprintf;
@@ -1120,7 +1122,9 @@ public function getTruncateTableSQL($tableName, $cascade = false)
      */
     public function getDummySelectSQL()
     {
-        return 'SELECT 1 FROM DUAL';
+        $expression = func_num_args() > 0 ? func_get_arg(0) : '1';
+
+        return sprintf('SELECT %s FROM DUAL', $expression);
     }
 
     /**
diff --git a/tests/Doctrine/Tests/DBAL/Functional/LikeWildcardsEscapingTest.php b/tests/Doctrine/Tests/DBAL/Functional/LikeWildcardsEscapingTest.php
index ac3f6574d6f..9f2a098d7f5 100644
--- a/tests/Doctrine/Tests/DBAL/Functional/LikeWildcardsEscapingTest.php
+++ b/tests/Doctrine/Tests/DBAL/Functional/LikeWildcardsEscapingTest.php
@@ -13,16 +13,16 @@ public function testFetchLikeExpressionResult() : void
         $string           = '_25% off_ your next purchase \o/ [$̲̅(̲̅5̲̅)̲̅$̲̅] (^̮^)';
         $escapeChar       = '!';
         $databasePlatform = $this->_conn->getDatabasePlatform();
-        $stmt             = $this->_conn->prepare(str_replace(
-            '1',
-            sprintf(
-                "(CASE WHEN '%s' LIKE '%s' ESCAPE '%s' THEN 1 ELSE 0 END)",
-                $string,
-                $databasePlatform->escapeStringForLike($string, $escapeChar),
-                $escapeChar
-            ),
-            $databasePlatform->getDummySelectSQL()
-        ));
+        $stmt             = $this->_conn->prepare(
+            $databasePlatform->getDummySelectSQL(
+                sprintf(
+                    "(CASE WHEN '%s' LIKE '%s' ESCAPE '%s' THEN 1 ELSE 0 END)",
+                    $string,
+                    $databasePlatform->escapeStringForLike($string, $escapeChar),
+                    $escapeChar
+                )
+            )
+        );
         $stmt->execute();
         $this->assertTrue((bool) $stmt->fetchColumn());
     }