我正在对DB2/MySQL空间函数进行一些性能比较。但是,在我将DB2空间查询翻译成MySQL方言后,它报告语法错误(错误:函数交集不存在)。查询非常简单,如下所示:
SELECT Area(Intersection(a.outline, b.outline) )/Area(Union( a.outline, b.outline)) AS area_ratio, Distance(Centroid(b.outline), Centroid(a.outline) ) AS centroid_distance
FROM spatial_table1 A, spatial_table2 B ..
使用ActiveJDBC,我一直在手动打开和关闭连接,插入和读取任何内容,所有这些都没有出现以下错误:
public class DatabaseLoader {
private static final Logger logger = LogManager.getLogger(DatabaseLoader.class);
public static void openConnection() {
Base.open("com.mysql.cj.jdbc.Driver", ConfigManager.getAddress(), ConfigM
我正处于阿曼达备份的中间,在大约60 it之后,它退出时出现了以下错误:
localhost /home lev 0 FAILED [data write: Connection reset by peer]
localhost /home lev 0 partial taper: No space left on device: No space left on device
localhost /home lev 0 FAILED [data write: Connection reset by peer]
localhost /home lev 0 partial