func (self *Connection) ExecuteFetch(query []byte, maxrows int) (qr *QueryResult, err error) {
defer handleError(&err)
self.validate()
if C.mysql_real_query(self.handle, (*C.char)(unsafe.Pointer(&query[0])), C.ulong(len(query))) != 0 {
return nil, self.lastError(query)
}
result := C.mysql_store_result(self.handle)
if result == nil {
if int(C.mysql_field_count(self.handle)) != 0 { // Query was supposed to return data, but it didn't
return nil, self.lastError(query)
}
qr = &QueryResult{}
qr.RowsAffected = uint64(C.mysql_affected_rows(self.handle))
qr.InsertId = uint64(C.mysql_insert_id(self.handle))
return qr, nil
}
defer C.mysql_free_result(result)
qr = &QueryResult{}
qr.RowsAffected = uint64(C.mysql_affected_rows(self.handle))
if qr.RowsAffected > uint64(maxrows) {
return nil, &SqlError{0, fmt.Sprintf("Row count exceeded %d", maxrows), string(query)}
}
qr.Fields = self.buildFields(result)
qr.Rows = self.fetchAll(result)
return qr, nil
}
//获取影响的行数(插入的行数、更新的数行、删除的行数、查询的行数等),
//成功返回0, 否则返回errnum
func (mysql *MySQL) AffectedRows() (rownum uint64) {
rownum = uint64(C.mysql_affected_rows(mysql.my))
return
}