c:mysql:mysql.h:mysql_data_seek
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c:mysql:mysql.h:mysql_data_seek [2013/02/03 20:19] 127.0.0.1 external edit |
c:mysql:mysql.h:mysql_data_seek [2024/02/16 01:12] (current) |
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| Line 1: | Line 1: | ||
| ====== mysql_data_seek ====== | ====== mysql_data_seek ====== | ||
| <code c> | <code c> | ||
| + | void mysql_data_seek(MYSQL_RES *result, my_ulonglong offset) | ||
| </code> | </code> | ||
| ==== 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 | ||
on the occasion of the current invasion of Russia in Ukraine
c/mysql/mysql.h/mysql_data_seek.1359919178.txt · Last modified: 2024/02/16 01:11 (external edit)
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