1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
/***********************************************************************/
/* (C) Copyright to the author Olivier BERTRAND 2015 */
/***********************************************************************/
#include <my_global.h>
#include <mysqld.h>
#include <string.h>
#if defined(_WIN32)
#define DllExport __declspec( dllexport )
#else // !_WIN32
#define DllExport
#endif // !_WIN32
extern "C" {
DllExport my_bool noconst_init(UDF_INIT*, UDF_ARGS*, char*);
DllExport char *noconst(UDF_INIT*, UDF_ARGS*, char*, unsigned long*, char*, char*);
} // extern "C"
/***********************************************************************/
/* Returns its argument saying it is not a constant. */
/***********************************************************************/
my_bool noconst_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
if (args->arg_count != 1 || args->arg_type[0] != STRING_RESULT) {
strcpy(message, "noconst unique argument must be a string");
return true;
} // endif arg
initid->const_item = false; // The trick!
return false;
} // end of noconst_init
char *noconst(UDF_INIT *initid, UDF_ARGS *args, char *result,
unsigned long *res_length, char *, char *)
{
return args->args[0];
} // end of noconst
|
