diff --git a/src/Components/AlterOperation.php b/src/Components/AlterOperation.php
index 261187ec0..a444d6f6b 100644
--- a/src/Components/AlterOperation.php
+++ b/src/Components/AlterOperation.php
@@ -279,9 +279,6 @@ public static function parse(Parser $parser, TokensList $list, array $options =
                     }
                 } elseif (! self::checkIfTokenQuotedSymbol($token)) {
                     if (! empty(Parser::$STATEMENT_PARSERS[$token->value])) {
-                        // We have reached the end of ALTER operation and suddenly found
-                        // a start to new statement, but have not find a delimiter between them
-
                         // We want to get the next non-comment and non-space token after $token
                         // therefore, the first getNext call will start with the current $idx which's $token,
                         // will return it and increase $idx by 1, which's not guaranteed to be non-comment
@@ -292,15 +289,18 @@ public static function parse(Parser $parser, TokensList $list, array $options =
                         $list->getNext();
                         $nextToken = $list->getNext();
 
-                        if (
-                            ($token->value !== 'SET' ||
-                            (
-                                $list->tokens[$currentTokenID - 1]->value !== 'CHARACTER' &&
-                                $nextToken->value !== '(' &&
-                                $nextToken->value !== 'DEFAULT'
-                            )
-                            )
-                        ) {
+                        if ($token->value === 'SET' && $list->tokens[$currentTokenID - 1]->value === 'CHARACTER'){
+                        // Reverting the changes we made in the beginning
+                        $list->idx = $currentTokenID;
+                        } else if ($token->value === 'SET' && $nextToken->value === '('){
+                            // To avoid adding the tokens between the SET() parentheses to the unknown tokens
+                            $list->getNextOfTypeAndValue(Token::TYPE_OPERATOR, ')');
+                        } else if ($token->value === 'SET' && $nextToken->value === 'DEFAULT'){
+                            // to avoid adding the `DEFAULT` token to the unknown tokens.
+                            ++$list->idx;
+                        } else {
+                            // We have reached the end of ALTER operation and suddenly found
+                            // a start to new statement, but have not find a delimiter between them
                             $parser->error(
                                 'A new statement was found, but no delimiter between it and the previous one.',
                                 $token
@@ -308,16 +308,6 @@ public static function parse(Parser $parser, TokensList $list, array $options =
                             break;
                         }
 
-                        if ($nextToken->value === '(') {
-                            // To avoid adding the tokens between the SET() parentheses to the unknown tokens
-                            $list->getNextOfTypeAndValue(Token::TYPE_OPERATOR, ')');
-                        } elseif ($nextToken->value === 'DEFAULT') {
-                            // to avoid adding the `DEFAULT` token to the unknown tokens.
-                            ++$list->idx;
-                        } else {
-                            // Reverting the changes we made in the beginning
-                            $list->idx = $currentTokenID;
-                        }
                     } elseif ((array_key_exists($array_key, self::$DB_OPTIONS)
                         || array_key_exists($array_key, self::$TABLE_OPTIONS))
                         && ! self::checkIfColumnDefinitionKeyword($array_key)