@@ -23,6 +23,7 @@ phpMyAdmin - ChangeLog
 - issue        Some languages are now correctly detected from the HTTP header
 - issue #17617 Sorting is correctly remembered when $cfg['RememberSorting'] is true
 - issue #17593 Table filtering now works when action buttons are on the right side of the row
+- issue #17388 Find and Replace using regex now makes a valid query if no matching result set found
 
 5.2.0 (2022-05-10)
 - issue #16521 Upgrade Bootstrap to version 5
 
@@ -321,17 +321,24 @@ public function replace(
         if ($useRegex) {
             $toReplace = $this->getRegexReplaceRows($columnIndex, $find, $replaceWith, $charSet);
             $sql_query = 'UPDATE ' . Util::backquote($GLOBALS['table'])
-                . ' SET ' . Util::backquote($column) . ' = CASE';
+                . ' SET ' . Util::backquote($column);
+
             if (is_array($toReplace)) {
-                foreach ($toReplace as $row) {
-                    $sql_query .= "\n WHEN " . Util::backquote($column)
-                        . " = '" . $this->dbi->escapeString($row[0])
-                        . "' THEN '" . $this->dbi->escapeString($row[1]) . "'";
+                if (count($toReplace) > 0) {
+                    $sql_query .= ' = CASE';
+                    foreach ($toReplace as $row) {
+                        $sql_query .= "\n WHEN " . Util::backquote($column)
+                            . " = '" . $this->dbi->escapeString($row[0])
+                            . "' THEN '" . $this->dbi->escapeString($row[1]) . "'";
+                    }
+
+                    $sql_query .= ' END';
+                } else {
+                    $sql_query .= ' = ' . Util::backquote($column);
                 }
             }
 
-            $sql_query .= ' END'
-                . ' WHERE ' . Util::backquote($column)
+            $sql_query .= ' WHERE ' . Util::backquote($column)
                 . " RLIKE '" . $this->dbi->escapeString($find) . "' COLLATE "
                 . $charSet . '_bin'; // here we
             // change the collation of the 2nd operand to a case sensitive
 
@@ -3328,7 +3328,7 @@
     </MixedAssignment>
   </file>
   <file src="libraries/classes/Controllers/Table/FindReplaceController.php">
-    <MixedArgument occurrences="26">
+    <MixedArgument occurrences="27">
       <code>$_POST['columnIndex']</code>
       <code>$_POST['columnIndex']</code>
       <code>$_POST['find']</code>
@@ -3351,6 +3351,7 @@
       <code>$column</code>
       <code>$column</code>
       <code>$column</code>
+      <code>$column</code>
       <code>$column_types[$i]</code>
       <code>$row[0]</code>
       <code>$row[0]</code>
 
@@ -90,4 +90,24 @@ public function testReplace(): void
             . "WHERE `Field1` LIKE '%Field%' COLLATE UTF-8_bin";
         $this->assertEquals($result, $sql_query);
     }
+
+    public function testReplaceWithRegex(): void
+    {
+        $tableSearch = new FindReplaceController(ResponseRenderer::getInstance(), new Template(), $GLOBALS['dbi']);
+
+        $columnIndex = 0;
+        $find = 'Field';
+        $replaceWith = 'Column';
+        $useRegex = true;
+        $charSet = 'UTF-8';
+
+        $tableSearch->replace($columnIndex, $find, $replaceWith, $useRegex, $charSet);
+
+        $sql_query = $GLOBALS['sql_query'];
+
+        $result = 'UPDATE `table` SET `Field1` = `Field1`'
+            . " WHERE `Field1` RLIKE 'Field' COLLATE UTF-8_bin";
+
+        $this->assertEquals($result, $sql_query);
+    }
 }