Mysql-动态执行SQL语句

prepare 准备

using   使用

deallocate    释放

execute   执行

delimiter $
drop procedure if exists proc $
create procedure proc()
begin
    declare p1 int;
    set p1 = 11;
    set @p1 = p1;
    prepare prod from 'select * from log where nid > ?';
    execute prod using @p1;
    deallocate prepare prod;
end $
delimiter ;
call proc();

delimiter $
drop procedure if exists proc $
create procedure proc(in strsql varchar(128),in p1 int)
begin
  set @strsql = strsql;
    set @p1 = p1;
    prepare prod from @strsql;
    execute prod using @p1;
    deallocate prepare prod;
end $
delimiter ;
call proc('select * from log where nid > ?',103);