Comments on: 用OCI 8实现了sqluldr2

By: anysql

anysql — Thu, 11 Jun 2009 22:23:00 +0000

Show一下你的表结构? 我测试一下.

By: lkdd

lkdd — Thu, 11 Jun 2009 20:52:19 +0000

ORA-00932: 数据类型不一致: 应为 CHAR, 但却获得 BLOB
我在导出的时候报这个错。我本机windows xp ,客户端10G,服务器也是10G，请问下这个是不能导出lob字段啊？

By: anysql

anysql — Wed, 01 Apr 2009 17:06:55 +0000

Widnwos下fpos_t这个是一个8字节的整数，是64位的，用fsetpos来设置文件位置, 然后读取内容。

By: anysql

anysql — Wed, 01 Apr 2009 17:04:13 +0000

fread参数有两个大小单位，第一个是记录长度，第二个是读取的记录数，结合起来，可以超过2GB的。
对于文本导出来说, 我只写出，应当是可以超出4GB的，我手头上没有这么大的表，应当测试一下。
为什么不用Windows的函数, 是因为这个程序还要在其他平台上编译，所以只用标准C函数。

By: l1t

l1t — Wed, 01 Apr 2009 16:45:30 +0000

BOOL WINAPI GetFileSizeEx(
__in HANDLE hFile,
__out PLARGE_INTEGER lpFileSize
);
Parameters
hFile [in]
A handle to the file. The handle must have been created with either the GENERIC_READ or GENERIC_WRITE access right. For more information, see File Security and Access Rights.
lpFileSize [out]
A pointer to a LARGE_INTEGER structure that receives the file size, in bytes.
LARGE_INTEGER Union
The LARGE_INTEGER structure is used to represent a 64-bit signed integer value.
Note Your C compiler may support 64-bit integers natively. For example, Microsoft Visual C++ supports the __int64 sized integer type. For more information, see the documentation included with your C compiler.
Syntax
typedef union _LARGE_INTEGER { struct { DWORD LowPart; LONG HighPart; } ; struct { DWORD LowPart; LONG HighPart; } u; LONGLONG QuadPart;
} LARGE_INTEGER, *PLARGE_INTEGER;

By: l1t

l1t — Wed, 01 Apr 2009 16:32:26 +0000

我记错了，是4G限制
#ifndef _SIZE_T_DEFINED
typedef unsigned int size_t;
#define _SIZE_T_DEFINED
#endif
_CRTIMP size_t __cdecl fread(void *, size_t, size_t, FILE *);
访问不能超过2^32

By: anysql

anysql — Wed, 01 Apr 2009 01:18:36 +0000

Windows上没有2G的限制吧?

By: l1t

l1t — Wed, 01 Apr 2009 00:01:15 +0000

windows上fopen/fread有2g限制,不知道是否用CreateFIle好一些，内存映射文件有帮助吗