diff --git a/4dev/tests/DB/CoreLibsDBIOTest.php b/4dev/tests/DB/CoreLibsDBIOTest.php
index 14767292..ac6314d6 100644
--- a/4dev/tests/DB/CoreLibsDBIOTest.php
+++ b/4dev/tests/DB/CoreLibsDBIOTest.php
@@ -5196,6 +5196,27 @@ final class CoreLibsDBIOTest extends TestCase
 				SQL,
 				'count' => 1,
 				'convert' => false,
+			],
+			'update with case' => [
+				'query' => <<<SQL
+				UPDATE table_with_primary_key SET
+					row_int = $1::INT,
+					row_varchar = CASE WHEN row_int = 1 THEN $2 ELSE 'bar'::VARCHAR END
+				WHERE
+					row_varchar = $3
+				SQL,
+				'count' => 3,
+				'convert' => false,
+			],
+			'select with case' => [
+				'query' => <<<SQL
+				SELECT row_int
+				FROM table_with_primary_key
+				WHERE
+					row_varchar = CASE WHEN row_int = 1 THEN $1 ELSE $2 END
+				SQL,
+				'count' => 2,
+				'convert' => false,
 			]
 		];
 	}
diff --git a/www/admin/class_test.db.query-placeholder.php b/www/admin/class_test.db.query-placeholder.php
index 87b57971..c77cff6a 100644
--- a/www/admin/class_test.db.query-placeholder.php
+++ b/www/admin/class_test.db.query-placeholder.php
@@ -174,6 +174,26 @@ while (is_array($res = $db->dbReturnParams($query, [$query_value]))) {
 
 echo "<hr>";
 
+echo "<b>CASE part</b><br>";
+$query = <<<SQL
+UPDATE
+test_foo
+SET
+some_timestamp = NOW(),
+	-- if not 1 set, else keep at one
+	smallint_a = (CASE
+			WHEN smallint_a <> 1 THEN $1
+			ELSE 1::INT
+	END)::INT
+WHERE
+	string_a = $2
+SQL;
+echo "QUERY: <pre>" . $query . "</pre>";
+$res = $db->dbExecParams($query, [1, 'foobar']);
+print "ERROR: " . $db->dbGetLastError(true) . "<br>";
+
+echo "<hr>";
+
 // test connectors: = , <> () for query detection
 
 // convert placeholder tests
@@ -237,7 +257,7 @@ SQL,
 		SQL,
 		'params' => [1, 2, 3, 4, 5, 6],
 		'direction' => 'pg'
-	]
+	],
 ];
 
 $db->dbSetConvertPlaceholder(true);
diff --git a/www/lib/CoreLibs/DB/Support/ConvertPlaceholder.php b/www/lib/CoreLibs/DB/Support/ConvertPlaceholder.php
index dff03788..484b7828 100644
--- a/www/lib/CoreLibs/DB/Support/ConvertPlaceholder.php
+++ b/www/lib/CoreLibs/DB/Support/ConvertPlaceholder.php
@@ -26,7 +26,9 @@ class ConvertPlaceholder
 		. '&&|' // array overlap
 		. '\-\|\-|' // range overlap for array
 		. '[^-]-{1}|' // single -, used in JSON too
-		. '->|->>|#>|#>>|@>|<@|@@|@\?|\?{1}|\?\||\?&|#-'; //JSON searches, Array searchs, etc
+		. '->|->>|#>|#>>|@>|<@|@@|@\?|\?{1}|\?\||\?&|#-|' // JSON searches, Array searchs, etc
+		. 'THEN|ELSE' // command parts (CASE)
+	;
 	/** @var string the main regex including  the pattern query split */
 	private const PATTERN_ELEMENT = '(?:\'.*?\')?\s*(?:' . self::PATTERN_QUERY_SPLIT . ')\s*';
 	/** @var string comment regex