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c:mysql:mysql.h:mysql_data_seek [2013/02/25 23:30] Daniel Gohlke |
c:mysql:mysql.h:mysql_data_seek [2024/02/16 01:12] (current) |
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==== description of mysql_data_seek ==== | ==== description of mysql_data_seek ==== | ||
- | mysql_data_seek is in work by code-reference.com \\ | + | mysql_data_seek find any row in a result set.\\ |
- | if you are faster... don't hasitate and add it | + | the offset value is a row number from 0 to mysql_num_rows (result) -1. |
+ | As required for this feature is that the result set structure contains the entire result set, can mysql_data_seek() may be used only in conjunction with mysql_store_result(), not with mysql_use_result(). | ||
<code c> | <code c> | ||
- | no example at the moment | + | #include <stdio.h> /* including standard library */ |
+ | #include <mysql/mysql.h> | ||
+ | |||
+ | MYSQL *my; | ||
+ | MYSQL_ROW row; | ||
+ | MYSQL_RES *result; | ||
+ | |||
+ | int main( void ){ | ||
+ | char host[20]; | ||
+ | char user[20]; | ||
+ | char pass[20]; | ||
+ | unsigned long num_rows = 0; | ||
+ | |||
+ | my = mysql_init(NULL); | ||
+ | |||
+ | |||
+ | sprintf(host,"localhost"); | ||
+ | sprintf(user,"username"); | ||
+ | sprintf(pass,"password"); | ||
+ | |||
+ | if (my == NULL ) { | ||
+ | printf("Cant initalisize MySQL\n"); | ||
+ | return 1; | ||
+ | } | ||
+ | |||
+ | if( mysql_real_connect (my,host,user,pass,NULL,0,NULL,0) == NULL) { | ||
+ | printf("Error cant login\n"); | ||
+ | } else { | ||
+ | printf("Login correct\n"); | ||
+ | } | ||
+ | |||
+ | mysql_select_db(my, "test"); | ||
+ | mysql_query(my, "SELECT * FROM collection WHERE 1;"); | ||
+ | result = mysql_store_result(my); | ||
+ | |||
+ | |||
+ | num_rows = (unsigned long) mysql_num_rows(result); | ||
+ | printf("num_rows %li\n", num_rows); | ||
+ | |||
+ | mysql_data_seek(result, 1); | ||
+ | |||
+ | while ((row = mysql_fetch_row(result))) { | ||
+ | printf("%s %s %s\n", row[0], row[1], row[2]); | ||
+ | } | ||
+ | |||
+ | mysql_close(my); | ||
+ | return 0; | ||
+ | } | ||
</code> | </code> | ||
===== output of mysql_data_seek c example ===== | ===== output of mysql_data_seek c example ===== | ||
- | no example at the moment | + | Login correct |
+ | num_rows 2 | ||
+ | 2 othername othertitle | ||