Merge pull request #5361 from kenjis/fix-prefixed-alias-bug

fix: table alias is prefixed when LIKE clause

Author: kenjis

system/Database/BaseConnection.php

@@ -1014,7 +1014,8 @@ public function protectIdentifiers($item, bool $prefixSingle = false, ?bool $pro
             //
             // NOTE: The ! empty() condition prevents this method
             // from breaking when QB isn't enabled.
-            if (! empty($this->aliasedTables) && in_array($parts[0], $this->aliasedTables, true)) {
+            $firstSegment = trim($parts[0], $this->escapeChar);
+            if (! empty($this->aliasedTables) && in_array($firstSegment, $this->aliasedTables, true)) {
                 if ($protectIdentifiers === true) {
                     foreach ($parts as $key => $val) {
                         if (! in_array($val, $this->reservedIdentifiers, true)) {

tests/system/Database/Builder/AliasTest.php

@@ -84,4 +84,20 @@ public function testAliasLeftJoinWithLongTableName()
 
         $this->assertSame($expectedSQL, str_replace("\n", ' ', $builder->getCompiledSelect()));
     }
+
+    /**
+     * @see https://github.com/codeigniter4/CodeIgniter4/issues/5360
+     */
+    public function testAliasSimpleLikeWithDBPrefix()
+    {
+        $this->setPrivateProperty($this->db, 'DBPrefix', 'db_');
+        $builder = $this->db->table('jobs j');
+
+        $builder->like('j.name', 'veloper');
+
+        $expectedSQL = <<<'SQL'
+            SELECT * FROM "db_jobs" "j" WHERE "j"."name" LIKE '%veloper%' ESCAPE '!'
+            SQL;
+        $this->assertSame($expectedSQL, str_replace("\n", ' ', $builder->getCompiledSelect()));
+    }
 }