Question

我试图在表UsefulResources上创建触发器。

触发器代码如下所示：

create trigger TBD_UsefulResources before delete
on UsefulResources for each row
begin
    Update SystemCycle set CurrentCycle=CurrentCycle+1;

    INSERT INTO DeletedPhysically (TableName, PKName, PKValue, DelAtRowCycle, RowCycle, Created)
    VALUES ("UsefulResources", "Ufr_GUID", OLD.Ufr_GUID, (Select CurrentCycle From `SystemCycle` where Syc_ID=1), (Select CurrentCycle From `SystemCycle` where Syc_ID=1), now());
end;

但是，如果我想通过mysql客户端执行它，我会收到以下错误：

mysql> create trigger TBD_UsefulResources before delete
    -> on UsefulResources for each row
    -> begin
    ->     Update SystemCycle set CurrentCycle=CurrentCycle+1;
ERROR 1064 (42000): 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 4
mysql>
mysql>     INSERT INTO DeletedPhysically (TableName, PKName, PKValue, DelAtRowCycle, RowCycle, Created)
    ->     VALUES ("UsefulResources", "Ufr_GUID", OLD.Ufr_GUID, (Select CurrentCycle From `SystemCycle` where Syc_ID=1), (Select CurrentCycle From `SystemCycle` where Syc_ID=1), now());
ERROR 1054 (42S22): Unknown column 'OLD.Ufr_GUID' in 'field list'
mysql> end;
ERROR 1064 (42000): 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 'end' at line 1
mysql>

当我通过我的客户端执行创建触发器时，它在执行之前没有检查sql语法，它在服务器上工作正常。

有什么想法吗？

Answer 1

感谢@Mihai

像这样的代码解决了这个问题。我们需要更改结束行分隔符以停止每个“;”上的执行命令。这只是一个客户问题。当我通过

#m.pyz
import numpy as np
cimport numpy as np
from cython.view cimport array as cvarray

cdef extern from 'cm.h':
    double per(double **marr,int rows,int cols);

def test(double[:,::1] x):
    cdef int rows = x.shape[0]
    cdef int cols = x.shape[1]
    per(x,rows,cols)
    for i in range(rows):
        for j in range(cols):
            print x[i,j]

执行代码块时，它起作用，因为系统将整个查询视为一件事。

所以正确的代码应如下所示：

Error compiling Cython file:
------------------------------------------------------------
...
    double per(double **marr,int rows,int cols);

def test(double[:,::1] x):
    cdef int rows = x.shape[0]
    cdef int cols = x.shape[1]
    per(x,rows,cols)
        ^
------------------------------------------------------------

m.pyx:12:9: Cannot assign type 'double[:, ::1]' to 'double **'

触发未知列＆＃39; OLD＆＃39;在＆＃39;字段列表＆＃39;

1 个答案: