Fixes #299 - array_key_exists warning when parsing a "DEFAULT FALSE" token

Signed-off-by: Saksham Gupta <[email protected]>

Author: shucon

src/Components/AlterOperation.php

@@ -263,6 +263,12 @@ public static function parse(Parser $parser, TokensList $list, array $options =
                 }
                 $state = 2;
             } elseif ($state === 2) {
+                $array_key = '';
+                if (is_string($token->value) || is_numeric($token->value)) {
+                    $array_key = $token->value;
+                } else {
+                    $array_key = $token->token;
+                }
                 if ($token->type === Token::TYPE_OPERATOR) {
                     if ($token->value === '(') {
                         ++$brackets;
@@ -282,9 +288,9 @@ public static function parse(Parser $parser, TokensList $list, array $options =
                         );
                         break;
                     }
-                } elseif ((array_key_exists($token->value, self::$DB_OPTIONS)
-                    || array_key_exists($token->value, self::$TABLE_OPTIONS))
-                    && ! self::checkIfColumnDefinitionKeyword($token->value)
+                } elseif ((array_key_exists($array_key, self::$DB_OPTIONS)
+                    || array_key_exists($array_key, self::$TABLE_OPTIONS))
+                    && ! self::checkIfColumnDefinitionKeyword($array_key)
                 ) {
                     // This alter operation has finished, which means a comma was missing before start of new alter operation
                     $parser->error(