<\/span><\/h2>\n\n\n\n\u5982\u4e0b\u662f\u6839\u636eint\u7c7b\u578b\u505arange\u5206\u533a\u7684\u8868\uff0c\u6309\u716710\uff0c100\uff0c\u5176\u5b83\u505a\u62103\u4e2a\u5206\u533a\u3002<\/p>\n\n\n\n
CREATE TABLE t_range (\r\n id INT\r\n ,name VARCHAR(100)\r\n ) PARTITION BY range (id) (\r\n PARTITION p_10 VALUES less than(100)\r\n ,PARTITION p_100 VALUES less than(10)\r\n ,PARTITION p_other VALUES less than MAXVALUE\r\n );<\/code><\/pre>\n\n\n\n<\/span>\u6d4b\u8bd5\u6570\u636e<\/span><\/h2>\n\n\n\n<\/span>\u63d2\u5165\u666e\u901a\u6570\u636e<\/span><\/h3>\n\n\n\ngbase> select * from t_range;\r\nEmpty set (Elapsed: 00:00:00.03)\r\n\r\ngbase> insert into t_range values(1,'v=1');\r\nQuery OK, 1 row affected (Elapsed: 00:00:00.09)\r\n\r\ngbase> insert into t_range values(50,'v=50');\r\nQuery OK, 1 row affected (Elapsed: 00:00:00.06)\r\n\r\ngbase> insert into t_range values(500,'v=500');\r\nQuery OK, 1 row affected (Elapsed: 00:00:00.05)\r\n<\/code><\/pre>\n\n\n\n<\/span>\u67e5\u770b\u6570\u636e<\/span><\/h3>\n\n\n\n\u901a\u8fc7\u6307\u5b9a\u5206\u533a\u7684\u67e5\u8be2\uff0c\u6570\u636e\u5747\u6b63\u786e\u7684\u5728\u5404\u4e2a\u5206\u533a\u91cc\uff0c<\/p>\n\n\n\n
gbase> select * from t_range;\r\n+------+-------+\r\n| id | name |\r\n+------+-------+\r\n| 1 | v=1 |\r\n| 50 | v=50 |\r\n| 500 | v=500 |\r\n+------+-------+\r\n3 rows in set (Elapsed: 00:00:00.01)\r\n\r\ngbase> select * from t_range partition(p_10);\r\n+------+------+\r\n| id | name |\r\n+------+------+\r\n| 1 | v=1 |\r\n+------+------+\r\n1 row in set (Elapsed: 00:00:00.01)\r\n\r\ngbase> select * from t_range partition(p_100);\r\n+------+------+\r\n| id | name |\r\n+------+------+\r\n| 50 | v=50 |\r\n+------+------+\r\n1 row in set (Elapsed: 00:00:00.00)\r\n\r\ngbase> select * from t_range partition(p_other);\r\n+------+-------+\r\n| id | name |\r\n+------+-------+\r\n| 500 | v=500 |\r\n+------+-------+\r\n1 row in set (Elapsed: 00:00:00.01)\r\n<\/code><\/pre>\n\n\n\n<\/span>\u63d2\u5165NULL\u503c<\/span><\/h3>\n\n\n\n\u53ef\u4ee5\u770b\u5230\u5176\u4fdd\u5b58\u5728\u7b2c\u4e00\u4e2ap_10\u5206\u533a\u5185\u3002<\/p>\n\n\n\n
gbase> insert into t_range values(null,'v=NULL');\r\nQuery OK, 1 row affected (Elapsed: 00:00:00.06)\r\n\r\ngbase> select * from t_range partition(p_other);\r\n+------+-------+\r\n| id | name |\r\n+------+-------+\r\n| 500 | v=500 |\r\n+------+-------+\r\n1 row in set (Elapsed: 00:00:00.01)\r\n\r\ngbase> select * from t_range partition(p_100);\r\n+------+------+\r\n| id | name |\r\n+------+------+\r\n| 50 | v=50 |\r\n+------+------+\r\n1 row in set (Elapsed: 00:00:00.01)\r\n\r\ngbase> select * from t_range partition(p_10);\r\n+------+--------+\r\n| id | name |\r\n+------+--------+\r\n| 1 | v=1 |\r\n| NULL | v=NULL |\r\n+------+--------+\r\n2 rows in set (Elapsed: 00:00:00.01)\r\n<\/code><\/pre>\n\n\n\n<\/span>\u5220\u9664\u7b2c\u4e00\u4e2a\u5206\u533a<\/span><\/h3>\n\n\n\nnull\u503c\u5df2\u7ecf\u6d88\u5931\u3002<\/p>\n\n\n\n
gbase> alter table t_range drop partition p_10;\r\nQuery OK, 0 rows affected (Elapsed: 00:00:00.62)\r\nRecords: 0 Duplicates: 0 Warnings: 0\r\n\r\ngbase> select * from t_range;\r\n+------+-------+\r\n| id | name |\r\n+------+-------+\r\n| 50 | v=50 |\r\n| 500 | v=500 |\r\n+------+-------+\r\n2 rows in set (Elapsed: 00:00:00.01)\r\n<\/code><\/pre>\n\n\n\n<\/span>\u518d\u6b21\u63d2\u5165NULL\u503c<\/span><\/h3>\n\n\n\nnull\u503c\u88ab\u4fdd\u5b58\u5728\u5269\u4e0b\u5206\u533a\u7684\u7b2c\u4e00\u4e2a\u5206\u533a\u5185\uff0cp_100\u3002<\/p>\n\n\n\n
gbase> insert into t_range values(null,'v=NULL2');\r\nQuery OK, 1 row affected (Elapsed: 00:00:00.05)\r\n\r\ngbase> select * from t_range;\r\n+------+---------+\r\n| id | name |\r\n+------+---------+\r\n| 50 | v=50 |\r\n| NULL | v=NULL2 |\r\n| 500 | v=500 |\r\n+------+---------+\r\n3 rows in set (Elapsed: 00:00:00.01)\r\n\r\ngbase> select * from t_range partition(p_10);\r\nERROR 1893 (HY000): Unknown partition 'p_10' in table 't_range'\r\ngbase> select * from t_range partition(p_100);\r\n+------+---------+\r\n| id | name |\r\n+------+---------+\r\n| 50 | v=50 |\r\n| NULL | v=NULL2 |\r\n+------+---------+\r\n2 rows in set (Elapsed: 00:00:00.02)\r\n\r\ngbase> select * from t_range partition(p_other);\r\n+------+-------+\r\n| id | name |\r\n+------+-------+\r\n| 500 | v=500 |\r\n+------+-------+\r\n1 row in set (Elapsed: 00:00:00.01)\r\n<\/code><\/pre>\n\n\n\n<\/span>Summary<\/span><\/h2>\n\n\n\nGBase 8a\u7684Range\u5206\u533a\uff0c\u5bf9NULl\u503c\u662f\u4fdd\u5b58\u5728\u7b2c\u4e00\u4e2a\u5206\u533a\u5185\u7684\uff0c\u5982\u679c\u5206\u533a\u88ab\u5220\u9664\uff0c\u5219\u65b0\u6570\u636e\u4f1a\u88ab\u4fdd\u5b58\u5728\u6b8b\u7559\u5206\u533a\u7684\u7b2c\u4e00\u4e2a\u5206\u533a\u5185\u3002<\/p>\n\n\n\n
<\/p>\n\n\n\n
<\/p>\n\n\n\n
<\/p>","protected":false},"excerpt":{"rendered":"
\u672c\u6587\u6d4b\u8bd5\u5728GBase 8a\u6570\u636e\u5e93\u96c6\u7fa4\u91cc\uff0cRange\u5206\u533a\u8868\u91cc\u5bf9null\u503c\u7684\u5904\u7406\u65b9\u5f0f\uff0c\u5176\u9ed8\u8ba4\u4fdd\u5b58\u4f4d\u7f6e\u662f\u6240\u6709\u5206\u533a\u91cc\u6700\u5c0f\u7684\u4e00\u4e2a(\u4e5f\u5c31\u662f\u7b2c\u4e00\u4e2a)\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[80],"class_list":["post-5101","post","type-post","status-publish","format-standard","hentry","category-gbase8a","tag-80"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5101","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/comments?post=5101"}],"version-history":[{"count":2,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5101\/revisions"}],"predecessor-version":[{"id":5103,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5101\/revisions\/5103"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=5101"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=5101"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=5101"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}