cast to bigint, not unsigned in mysql

Author: vvkh

data_diff/databases/mysql.py

@@ -48,7 +48,7 @@ def import_mysql():
 @attrs.define(frozen=False)
 class Mixin_MD5(AbstractMixin_MD5):
     def md5_as_int(self, s: str) -> str:
-        return f"cast(conv(substring(md5({s}), {1+MD5_HEXDIGITS-CHECKSUM_HEXDIGITS}), 16, 10) as unsigned) - {CHECKSUM_OFFSET}"
+        return f"cast(conv(substring(md5({s}), {1+MD5_HEXDIGITS-CHECKSUM_HEXDIGITS}), 16, 10) as bigint) - {CHECKSUM_OFFSET}"
 
 
 @attrs.define(frozen=False)