I am installing MySQL on my Novell NetWare...
Articles and Tips: qna
01 Aug 2003
Q.
I am installing MySQL on my Novell NetWare 6 box with SP3 installed. Can anyone please tell me if it is possible to insert data in the database using C and how to do this if it is possible?
A.
I have attached a sample here. It's mytest.c, which comes with the MySQL sources. I modified it just a bit for NetWare, and created a Makefile which you can use with GNU make and CodeWarrior commandline tools. However I've not tested if the NLM works correctly, but it compiles without errors. It needs the libmysql.nlm which also comes with the MySQL distribution.
#ifdef WIN32
#include <windows.h>
#endif
#include <stdio.h>
#include <string.h>
#include <mysql.h>
#define DEFALT_SQL_STMT "SELECT * FROM db"
#ifndef offsetof
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
/********************************************************
** main :-
**
********************************************************/
int
main( int argc, char * argv[] )
{
char szSQL[ 200 ], aszFlds[ 25 ][ 25 ], szDB[ 50 ] ;
int i, j, k, l, x ;
const char * pszT ;
MYSQL * myData ;
MYSQL_RES * res ;
MYSQL_FIELD * fd ;
MYSQL_ROW row ;
//....just curious....
printf( "sizeof( MYSQL ) == %d\n", sizeof( MYSQL ) ) ;
if ( argc == 2 )
{
strcpy( szDB, argv[ 1 ] ) ;
strcpy( szSQL, DEFALT_SQL_STMT ) ;
if (!strcmp(szDB,"--debug"))
{
strcpy( szDB, "mysql" ) ;
printf("Some mysql struct information
(size and offset):\n");
printf("net:\t%3d %3d\n",sizeof(myData->net),
offsetof(MYSQL,net));
printf("host:\t%3d %3d\n",sizeof(myData->host),
offsetof(MYSQL,host));
printf("port:\t%3d %3d\n",sizeof(myData->port),
offsetof(MYSQL,port));
printf("protocol_version:\t%3d %3d\n",
sizeof(myData->protocol_version),
offsetof(MYSQL,protocol_version));
printf("thread_id:\t%3d %3d\n",
sizeof(myData->thread_id),
offsetof(MYSQL,thread_id));
printf("affected_rows:\t%3d %3d\n",
sizeof(myData->affected_rows),
offsetof(MYSQL,affected_rows));
printf("packet_length:\t%3d %3d\n",
sizeof(myData->packet_length),
offsetof(MYSQL,packet_length));
printf("status:\t%3d %3d\n",sizeof(myData->status),
offsetof(MYSQL,status));
printf("fields:\t%3d %3d\n",sizeof(myData->fields),
offsetof(MYSQL,fields));
printf("field_alloc:\t%3d %3d\n",
sizeof(myData->field_alloc),
offsetof(MYSQL,field_alloc));
printf("free_me:\t%3d %3d\n",
sizeof(myData->free_me),
offsetof(MYSQL,free_me));
printf("options:\t%3d %3d\n",
sizeof(myData->options),
offsetof(MYSQL,options));
puts("");
}
}
else if ( argc > 2 ) {
strcpy( szDB, argv[ 1 ] ) ;
strcpy( szSQL, argv[ 2 ] ) ;
}
else {
strcpy( szDB, "mysql" ) ;
strcpy( szSQL, DEFALT_SQL_STMT ) ;
}
//....
if ( (myData = mysql_init((MYSQL*) 0)) &&
mysql_real_connect( myData, NULL, NULL, NULL, NULL,
MYSQL_PORT, NULL, 0 ) )
{
if ( mysql_select_db( myData, szDB ) < 0 ) {
printf( "Can't select the %s database !\n", szDB ) ;
mysql_close( myData ) ;
return 2 ;
}
}
else {
printf( "Can't connect to the mysql server on port %d !\n",
MYSQL_PORT ) ;
mysql_close( myData ) ;
return 1 ;
}
//....
if ( ! mysql_query( myData, szSQL ) ) {
res = mysql_store_result( myData ) ;
i = (int) mysql_num_rows( res ) ; l = 1 ;
printf( "Query: %s\nNumber of records found: %ld\n", szSQL, i ) ;
//....we can get the field-specific characteristics here....
for ( x = 0 ; fd = mysql_fetch_field( res ) ; x++ )
strcpy( aszFlds[ x ], fd->name ) ;
//....
while ( row = mysql_fetch_row( res ) ) {
j = mysql_num_fields( res ) ;
printf( "Record #%ld:-\n", l++ ) ;
for ( k = 0 ; k < j ; k++ )
printf( " Fld #%d (%s): %s\n", k + 1, aszFlds[ k ],
(((row[k]==NULL)||(!strlen(row[k])))?"NULL":row[k])) ;
puts( "==============================\n" ) ;
}
mysql_free_result( res ) ;
}
else printf( "Couldn't execute %s on the server !\n", szSQL ) ;
//....
puts( "==== Diagnostic info ====" ) ;
pszT = mysql_get_client_info() ;
printf( "Client info: %s\n", pszT ) ;
//....
pszT = mysql_get_host_info( myData ) ;
printf( "Host info: %s\n", pszT ) ;
//....
pszT = mysql_get_server_info( myData ) ;
printf( "Server info: %s\n", pszT ) ;
//....
res = mysql_list_processes( myData ) ; l = 1 ;
if (res)
{
for ( x = 0 ; fd = mysql_fetch_field( res ) ; x++ )
strcpy( aszFlds[ x ], fd->name ) ;
while ( row = mysql_fetch_row( res ) ) {
j = mysql_num_fields( res ) ;
printf( "Process #%ld:-\n", l++ ) ;
for ( k = 0 ; k < j ; k++ )
printf( " Fld #%d (%s): %s\n", k + 1, aszFlds[ k ],
(((row[k]==NULL)||(!strlen(row[k])))?"NULL":row[k])) ;
puts( "==============================\n" ) ;
}
}
else
{
printf("Got error %s when retreiving processlist\n",
mysql_error(myData));
}
//....
res = mysql_list_tables( myData, "%" ) ; l = 1 ;
for ( x = 0 ; fd = mysql_fetch_field( res ) ; x++ )
strcpy( aszFlds[ x ], fd->name ) ;
while ( row = mysql_fetch_row( res ) ) {
j = mysql_num_fields( res ) ;
printf( "Table #%ld:-\n", l++ ) ;
for ( k = 0 ; k < j ; k++ )
printf( " Fld #%d (%s): %s\n", k + 1, aszFlds[ k ],
(((row[k]==NULL)||(!strlen(row[k])))?"NULL":row[k])) ;
puts( "==============================\n" ) ;
}
//....
pszT = mysql_stat( myData ) ;
puts( pszT ) ;
//....
mysql_close( myData ) ;
return 0 ;
}
* Originally published in Novell AppNotes
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The origin of this information may be internal or external to Novell. While Novell makes all reasonable efforts to verify this information, Novell does not make explicit or implied claims to its validity.