Function that uses SQL parameter binding in C

sql-param-bind.c

#include <mysql.h>

int commit_db(MYSQL *con){
	MYSQL_STMT *stmt;
	MYSQL_BIND bind[2];
	my_ulonglong affected_rows;
	item_t *curr = items_list;

	int count, param_count;
	unsigned long str_length;
	char str_data[64];
	char *query = "INSERT INTO Items VALUES(?, ?)";

	stmt = mysql_stmt_init(con);
	if (!stmt){
		printf("Failed to init SQL query!\n");
		return -1;
	}

	if (mysql_stmt_prepare(stmt, query, strlen(query))){
		printf("Failed to prepare SQL query!\n");
		goto exit;
	}

	param_count = mysql_stmt_param_count(stmt);
	if (param_count != 2){
		printf("Invalid parameter count returned!\n");
		goto exit;
	}

	memset(bind, 0, sizeof(bind));

	bind[0].buffer_type = MYSQL_TYPE_STRING;
	bind[0].buffer = (char *)str_data;
	bind[0].buffer_length = 64;
	bind[0].is_null = 0;
	bind[0].length = &str_length;

	bind[1].buffer_type = MYSQL_TYPE_LONG;
	bind[1].buffer = (char *)&count;
	bind[1].is_null = 0;
	bind[1].length = 0;

	if(mysql_stmt_bind_param(stmt, bind)){
		printf("Bind param failed!\n");
		goto exit;
	}

	while(curr != NULL){
		count = (int)curr->quantity;
		memset(str_data, 0, 64);
		strncpy(str_data, curr->name, 64);
		str_length = strlen(str_data);

		if (mysql_stmt_execute(stmt)){
			printf("Error executing query.\n");
			goto exit;
		}

		affected_rows = mysql_stmt_affected_rows(stmt);
		if (affected_rows != 1){
			printf("Invalid affected rows by DB!\n");
			goto exit;
		}

		curr = curr->next;
	}

exit:
	mysql_stmt_close(stmt);
	return 0;
}