[英]Create function in MonetDB
我正在尝试在数据库级别向monetDB添加一个简单函数,该函数只执行sum(n)并返回结果
create function sys.foo(number int)
returns int
begin
declare tsum int;
set tsum = 0;
while number > 0 do
set tsum = tsum + number;
set number = number -1;
end while;
return tsum;
end;
尝试执行上述代码时,我看到如下错误
[错误代码:0,SQL状态:42000]语法错误,意外的$ end,预期为WHILE:“创建函数sys.foo(number int)”中输入流的结尾
我可以在MySQL中添加相同的功能,并且可以正常工作!!
>select sys.foo(10)
sys.foo(10)
-----------
55
可以让我知道这里出了什么问题吗?
这对我来说很好用(MonetDB,Mac OS X的2014年10月版)
➜ ~ mclient Welcome to mclient, the MonetDB/SQL interactive terminal (unreleased) Database: MonetDB v11.19.16 (unreleased), 'demo' Type \\q to quit, \\? for a list of available commands auto commit mode: on sql>create function sys.foo(number int) more>returns int more>begin more>declare tsum int; more>set tsum = 0; more>while number > 0 do more>set tsum = tsum + number; more>set number = number -1; more>end while; more>return tsum; more>end; operation successful (2.127ms)
sql>select sys.foo(10); +------------------+ | foo_single_value | +==================+ | 55 | +------------------+ 1 tuple (1.771ms)
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