【MySQL案件】ERROR 1418

1.1.1. ERROR 1418

【环境的叙述性说明】

mysql5.0.67

【问题叙述性说明】

当它来到创建存储过程ERROR 1418一个错误。

# 创建函数SQL声明

CREATE FUNCTION `xxx`( num01 int ) RETURNSint(11)

begin

       declare mm  int default 0;

       if  (xx) then

                set mm = num01*num01*10;

       elseif  xxx then

                set mm = 10;  

       else

                case num01

                        when  30 then set mm = 111;

                        when  31 then set mm = 222;

                end case;      

       end if;

       return mm;

end

 

# 报错信息

# ERROR 1418 (HY000) at line xxxxx: Thisfunction has none of DETERMINISTIC, NO SQL, or READS SQL DATA in itsdeclaration and binary logging is enabled (you *might* want to use the lesssafe log_bin_trust_function_creators variable)

 

【解决方法】

关闭关闭binary log或者改动參数。

此处採用改动參数的方法：

set globallog_bin_trust_function_creators=1;

 

【报错原因】

By default, for a CREATE FUNCTION statement to be accepted, at least one of DETERMINISTIC, NOSQL, or READS SQL DATA must be specified explicitly. Otherwise an error occurs:

ERROR1418 (HY000): This function has none of DETERMINISTIC, NO SQL,

or READSSQL DATA in its declaration and binary logging is enabled

(you*might* want to use the less safe log_bin_trust_function_creators

variable)

If you set log_bin_trust_function_creators to 1, the requirement that functions be

deterministic or not modify data is dropped.

 

【參考资料】

Command-LineFormat --log-bin-trust-function-creators

Option-FileFormat log-bin-trust-function-creators

SystemVariable Name log_bin_trust_function_creators

VariableScope Global

DynamicVariable Yes

PermittedValues

Type boolean

Default FALSE

 

This variable applieswhen binary logging is enabled. It controls whether stored function creators canbe trusted not to create stored functions that will cause unsafe events to bewritten to the binary log. If set to 0 (the default), users are not permittedto create or alter stored functions unless they have the SUPER privilege in addition to the CREATE ROUTINE or ALTER ROUTINE privilege. A setting of0 also enforces the restriction that a function must be declared with the DETERMINISTIC characteristic, or with the READS SQL DATA or NO SQL characteristic. If the variable is set to 1, MySQLdoes not enforce these restrictions on stored function creation. This variablealso applies to trigger creation. See Section19.7, “Binary Logging of Stored Programs”.

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