Mysql-MYSQLPROCEDURE problem Emergency SOS thank you

I copied the creation statement of a stored procedure, deleted it, and re-created it. The result was always an error, and a syntax error was reported. I still did not find the error, SOS, thank you for the error message. The line I added was [Err] 1064 mysql.

I copied the creation statement of a stored procedure, deleted it, and re-created it. The result was always an error, and the syntax error was reported. no error was found in the end, SOS. thank you!
The line I added in bold

[Err] 1064-You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''at line 30

Create definer = 'root' @ 'loaclhost' PROCEDURE 'p _ SIG_INFO_MANAGEMENT '(IN vi_db_method VARCHAR (253), IN vi_sig_id VARCHAR (253), IN vi_sig_name_cn VARCHAR (253) character set utf8, IN bytes VARCHAR (253), IN vi_sig_action_id INT (11), IN vi_sig_protocol VARCHAR (253), IN vi_sig_version VARCHAR (8), IN vi_sig_encrypt DECIMAL (1 ), IN vi_sig_direction VARCHAR (253), IN vi_sig_port VARCHAR (253), IN vi _ Sig_type VARCHAR (253), IN vi_sig_priority INT (11), IN vi_sig_option DECIMAL (1), IN vi_sig_genlog INT (11), IN vi_sig_match_main VARCHAR (1024 ), -- IN vi_sig_match_2 VARCHAR (1024), -- IN vi_sig_match_3 VARCHAR (1024), IN every DECIMAL (1), -- IN vi_sig_createtime DATETIME, -- IN vi_sig_modifytime DATETIME, IN every VARCHAR (253 ), IN vi_sig_author_list VARCHAR (1024), IN vi_sig_update _ History TEXT, IN vi_sig_desc TEXT, IN vi_sig_status DECIMAL (1), IN vi_sig_app_id INT (11), IN vi_sig_usrc_corevent DECIMAL (1) COMMENT 'application feature information record-management process. 'In in -- local val declared. -- ** DECLARE _ ERR_NUM INT (11); ** DECLARE _ ERR_MSG VARCHAR (253); DECLARE vi_sig_createtime TIMESTAMP; DECLARE vi_sig_modifytime TIMESTAMP; -- initial local val. SET _ ERR_NUM = 0; SET _ ERR_MSG = ""; -- default val given. SET vi_sig_createtime = CURRENT_TIME; SET vi_sig_modifytime = CURRENT_TIME; -- parameters security check. -- IF (vi_sig_author is null) then set _ ERR_NUM = 2; SET _ ERR_MSG = 'the user who modified this application IS unknown. '; ELSEIF (! STRCMP (vi_sig_author, "sapling") then set _ ERR_NUM = 11; SET _ ERR_MSG = 'system administrator [sapling] cannot operate on the database. '; end if; -- start to do standard mission. IF (! STRCMP (vi_db_method, "INSERT") then if (vi_sig_id is null) then set @ SIG_NUM_START = 16777216; -- (Hex: 0x0100 0000 Dec: 16777216) -- start to auto generate a sig id to keep unique. select count (T_SIG_ID) INTO vi_sig_id FROM 'sap _ all_assist_sigs '; -- calculate the total number of features of the current application --> 10 to SET vi_sig_id = @ SIG_NUM_START + vi_sig_id + 1; -- calculate the newly added feature ID --> 10 into SET vi_sig_id = CONCAT ("0x0", CONV (vi_sig_id, 10, 16); -- convert in hexadecimal format, and splice the standard header 0x0 --> to form a feature ID such as: 0x01001001. end if; -- start to do insert. insert into 'sap _ timeout' (T_SIG_ID, inflow, inflow, T_SIG_ACTION_ID, inflow, T_SIG_VERSION, inflow, T_SIG_DIRECTION, T_SIG_PORT, T_SIG_TYPE, inflow, T_SIG_OPTION, inflow, T_SIG_CREATETIME, t_SIG_MODIFYTIME, T_SIG_AUTHOR, T_SIG _ AUTHOR_LIST, numbers, T_SIG_DESC, T_SIG_STATUS, T_SIG_APP_ID, numbers) VALUES (vi_sig_id, audience, audience, -- Application feature ID, Chinese and English triplet VALUES, audience, vi_sig_version, audience, audience, vi_sig_port, -- Port, direction option dual group vi_sig_type, vi_sig_priority, vi_sig_option, vi_sig_genlog, vi_sig_match_main, vi_sig_audit_support, vi_sig_createtim E, vi_sig_modifytime, -- system time, automatically calculate vi_sig_author, vi_sig_author_list. -- The former is the current logon system account, and the latter is the list of all accounts that have modified this application, namely, region, vi_sig_desc, vi_sig_app_id, vi_sig_usrc_corevent); -- ID of the application to which the application feature belongs. (corresponding to the sap_all_apps table) ELSEIF (! STRCMP (vi_db_method, "UPDATE") then if (vi_sig_id is not null) then update 'sap _ region' SET T_SIG_NAME_CN = Beijing, T_SIG_NAME_EN = Beijing, T_SIG_ACTION_ID = vi_sig_action_id, t_SIG_PROTOCOL = protocol, T_SIG_VERSION = vi_sig_version, direction = direction, T_SIG_DIRECTION = direction, T_SIG_PORT = direction, T_SIG_TYPE = direction, direction = direction, T_SIG_OPTION = vi_sig_option, direction = direction, direction = direction, pipeline = pipeline, -- T_SIG_CREATETIME = vi_sig_createtime, pipeline = pipeline, pipeline = pipeline, T_SIG_AUTHOR_LIST = pipeline, pipeline = pipeline, T_SIG_DESC = pipeline, T_SIG_STATUS = vi_sig_status, T_SIG_APP_ID = pipeline, t_SIG_USRC_COREVENT = vi_sig_usrc_corevent WHERE T_SIG_ID = vi_sig_id; end if; else set _ ERR_NUM = 11; SET _ ERR_MSG = 'system administrator [sapling] cannot operate the database. '; select concat (_ ERR_NUM, ":", _ ERR_MSG); end if; END