id=50183
原因是mysql.proc 在5.1 comment char(64) -> 5.5 comment text 导致

The difference seen in the mysql.proc table is
5.5
<   `comment` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
---
5.1
 >   `comment` char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT ‘‘,


我们仅仅须要将table proc column comment 改为text类型就能够了

ALTER TABLE `proc`
MODIFY COLUMN `comment`  text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL;