如何删除 MySQL 中的所有过程和函数
How to drop all procedures and functions in MySQL
我想删除 MySQL 特定数据库中的所有过程和函数。我正在尝试使用此存储过程来实现此目的。
但是我得到一个错误:
Error Code: 1295 This command is not supported in the prepared statement protocol yet.
提前致谢。
delimiter $$
CREATE PROCEDURE sp_drop_all_stored_procedures()
begin
declare flag boolean default false;
declare sql_drop_statement varchar(1000);
declare statements cursor for SELECT
CONCAT('DROP ',ROUTINE_TYPE, ' ', ROUTINE_NAME, ';') as stmt
FROM information_schema.ROUTINES where ROUTINE_SCHEMA = 'DB_NAME' and
ROUTINE_NAME != sp_drop_all_stored_procedures;
declare continue handler for not found set flag := true;
open statements;
statements_loop: loop
fetch statements into sql_drop_statement;
if flag then
leave statements_loop;
end if;
set @drop_statement = sql_drop_statement;
select @drop_statement;
PREPARE stmt FROM @drop_statement;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
end loop statements_loop;
close statements;
end $$
delimiter ;
此处记录了可以作为准备好的语句执行的 SQL 语句的列表:https://dev.mysql.com/doc/refman/8.0/en/sql-prepared-statements.html#prepared-statements-permitted(向下滚动页面大约三分之二)。
DROP PROCEDURE 和 DROP FUNCTION 不在其中。
但是即使你避免使用准备好的语句你也做不到:
mysql> create procedure d() drop procedure p;
ERROR 1357 (HY000): Can't drop or alter a PROCEDURE from within another stored routine
因此,我认为您不能在存储过程中执行此操作。您必须从客户端执行此操作,您可以在其中格式化每个 SQL 语句并直接执行它,而不是作为准备好的语句。
我想删除 MySQL 特定数据库中的所有过程和函数。我正在尝试使用此存储过程来实现此目的。
但是我得到一个错误:
Error Code: 1295 This command is not supported in the prepared statement protocol yet.
提前致谢。
delimiter $$
CREATE PROCEDURE sp_drop_all_stored_procedures()
begin
declare flag boolean default false;
declare sql_drop_statement varchar(1000);
declare statements cursor for SELECT
CONCAT('DROP ',ROUTINE_TYPE, ' ', ROUTINE_NAME, ';') as stmt
FROM information_schema.ROUTINES where ROUTINE_SCHEMA = 'DB_NAME' and
ROUTINE_NAME != sp_drop_all_stored_procedures;
declare continue handler for not found set flag := true;
open statements;
statements_loop: loop
fetch statements into sql_drop_statement;
if flag then
leave statements_loop;
end if;
set @drop_statement = sql_drop_statement;
select @drop_statement;
PREPARE stmt FROM @drop_statement;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
end loop statements_loop;
close statements;
end $$
delimiter ;
此处记录了可以作为准备好的语句执行的 SQL 语句的列表:https://dev.mysql.com/doc/refman/8.0/en/sql-prepared-statements.html#prepared-statements-permitted(向下滚动页面大约三分之二)。
DROP PROCEDURE 和 DROP FUNCTION 不在其中。
但是即使你避免使用准备好的语句你也做不到:
mysql> create procedure d() drop procedure p;
ERROR 1357 (HY000): Can't drop or alter a PROCEDURE from within another stored routine
因此,我认为您不能在存储过程中执行此操作。您必须从客户端执行此操作,您可以在其中格式化每个 SQL 语句并直接执行它,而不是作为准备好的语句。