<\/span><\/h2>\n\n\n\n\u4e0d\u540c\u7684\u7248\u672c\u53ef\u80fd\u529f\u80fd\u6709\u53d8\u52a8\uff0c\u5982\u9700\u8981\u4e86\u89e3\u8be6\u60c5\uff0c\u8bf7\u54a8\u8be2\u6570\u636e\u5e93\u5382\u5546\u5f53\u524d\u6700\u65b0\u7248\u672c\u7684\u60c5\u51b5\u3002\u672c\u6587\u4e5f\u4f1a\u5c3d\u91cf\u540c\u6b65\u66f4\u65b0\u3002<\/p>\n\n\n\n
\ngbase> select @@version;\n+-----------------+\n| @@version |\n+-----------------+\n| 9.5.2.26.121440 |\n+-----------------+\n1 row in set (Elapsed: 00:00:00.00)\n\n<\/code><\/pre>\n\n\n\n<\/span>\u652f\u6301\u7684\u5206\u533a\u7c7b\u578b<\/span><\/h2>\n\n\n\n\u76ee\u524d\u5e38\u7528\u7684\u5206\u533a\u65b9\u6cd5\u6709RANGE\u5206\u533a\u3001LIST\u5206\u533a\u3001KEY\u5206\u533a\u3001HASH\u5206\u533a\uff0c\u5728\u5206\u533a\u7684\u7ba1\u7406\u4e0a\u76ee\u524d\u652f\u6301\u521b\u5efa\u5206\u533a\u3001\u6dfb\u52a0\u5206\u533a\u3001\u5220\u9664\u5206\u533a\u3002
RANGE\u5206\u533a\u8868\u548cLIST\u5206\u533a\u8868\u652f\u6301\u5b50\u5206\u533a\uff0c\u5b50\u5206\u533a\u7684\u5206\u533a\u7c7b\u578b\u53ef\u4ee5\u4e3a[LINEAR] HASH\u548c[LINEAR] KEY\u3002
information_schema.partitions\u4e2d\u53ef\u4ee5\u67e5\u5230\u6240\u521b\u5efa\u7684\u5206\u533a\u8868\u4fe1\u606f\u3002<\/p>\n\n\n\n
RANGE : \u4e00\u4e2a\u8fde\u7eed\u8303\u56f4
LIST : \u4e00\u4e2a\u4e2a\u7684\u5355\u72ec\u6307\u5b9a\u7684\u503c\uff0c\u53ef\u4ee5\u4e0d\u8fde\u7eed
KEY: \u652f\u6301\u5404\u79cd\u6570\u636e\u7c7b\u578b\uff0c\u6bd4\u5982\u5b57\u7b26\u4e32\uff0c\u7684hash\u5206\u7c7b\u65b9\u5f0f\u3002
HASH: \u9488\u5bf9\u6570\u5b57\u7684\u7684hash<\/p>\n\n\n\n
<\/span>\u5206\u533a\u8868\u652f\u6301\u5206\u533a\u5217\u7c7b\u578b<\/span><\/h3>\n\n\n\n\u6570\u503c\u578b, \u5982: int, bigint, smallint, float \u7b49
\u65f6\u95f4\u7c7b\u578b: date,datetime, time<\/p>\n\n\n\n
<\/span>\u652f\u6301\u5206\u533a\u51fd\u6570<\/span><\/h3>\n\n\n\nabs(), ceiling(), ceil(), datadiff(), day(), dayofmonth(), dayofweek(),dayofyear(), floor(), hour(), microsecond(), minute(), mod(),month(), quarter(), second(), time_to_sec(), to_days(), to_seconds(),weekday(), year(),yearweek(), +, -, *, \/, div, %, extract(),from_days()<\/p>\n\n\n\n
<\/span>\u5206\u533a<\/span><\/h2>\n\n\n\n<\/span>range \u5206\u533a<\/span><\/h3>\n\n\n\n<\/span>\u6570\u5b57\u7c7b\u578b\u7684range\u5206\u533a<\/span><\/h4>\n\n\n\ngbase> create table p1(id int)\npartition by range(id)(\n partition p1 values less than (10), \n partition po values less than MAXVALUE\n);\nQuery OK, 0 rows affected (Elapsed: 00:00:02.29)\n<\/code><\/pre>\n\n\n\n<\/span>\u65e5\u671f\u7c7b\u578b\u7684RANGE\u5206\u533a<\/span><\/h4>\n\n\n\ncreate table t_list_1(id int, name varchar(100),birth date)\n partition by range(birth)\n (\n partition p1357_1980 values less than (to_date('1980-01-01','yyyy-mm-dd')),\n partition p1357_2000 values less than (to_date('2000-01-01','yyyy-mm-dd')),\n partition p1357_other values less than MAXVALUE\n );<\/code><\/pre>\n\n\n\n<\/span>\u591a\u5217RANGE\u5206\u533a<\/span><\/h3>\n\n\n\n\u5f53\u524d\u7248\u672c\u5c1a\u4e0d\u652f\u6301\uff0c\u4f46\u540e\u7eed\u53ef\u80fd\u4f1a\u5b9e\u73b0\u3002<\/p>\n\n\n\n
gbase> create table t_range_multi(id int, name varchar(100),birth date)\n -> partition by range(id,birth)\n -> (\n -> partition p1357_1980 values less than (10,to_date('1980-01-01','yyyy-mm-dd')),\n -> partition p1357_2000 values less than (20,to_date('2000-01-01','yyyy-mm-dd')),\n -> partition p1357_other values less than MAXVALUE\n -> );\nERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your GBase server version for the right syntax to use near 'birth)\n (\n partition p1357_1980 values less than (10,to_date('1980-01-0' at line 2\ngbase>\n<\/code><\/pre>\n\n\n\n<\/span>list\u5206\u533a<\/span><\/h3>\n\n\n\ngbase> create table p2 (id int) \npartition by list(id)( \n partition a values in (1,3,5,7),\n partition b values in (2,4,6,8) \n);\nQuery OK, 0 rows affected (Elapsed: 00:00:00.61)\n<\/code><\/pre>\n\n\n\n<\/span>Key\u5206\u533a<\/span><\/h3>\n\n\n\n\u5982\u679c\u6ca1\u6307\u5b9a\u5206\u533a\u540d\u5b57\uff0c\u5219\u9ed8\u8ba4\u4ecep0\u5f00\u59cb\uff0cp0,p1,p2...\u3002\u67e5\u8be2\u65f6\u53ef\u4ee5\u7528 partition(p0,p1)\u8fd9\u6837\u6765\u6307\u5b9a\u5206\u533a\u3002<\/p>\n\n\n\n
<\/span>int\u7c7b\u578b\u7684key\u5206\u533a<\/span><\/h4>\n\n\n\ncreate table t_key_int(id int, name varchar(100),birth date)\n partition by key(id)\n (\n partition p01,\n partition p02 \n );\n\ngbase> create table t_key_int(id int, name varchar(100),birth date)\n -> partition by key(id)\n -> (\n -> partition p01,\n -> partition p02\n -> );\nQuery OK, 0 rows affected (Elapsed: 00:00:00.16)\n<\/code><\/pre>\n\n\n\n<\/span>varchar\u7c7b\u578b\u7684key\u5206\u533a<\/span><\/h4>\n\n\n\ncreate table t_key_varchar(id int, name varchar(100),birth date)\n partition by key(name)\n (\n partition p01,\n partition p02 \n );\ngbase> create table t_key_varchar(id int, name varchar(100),birth date)\n -> partition by key(name)\n -> (\n -> partition p01,\n -> partition p02\n -> );\nQuery OK, 0 rows affected (Elapsed: 00:00:00.17)\n<\/code><\/pre>\n\n\n\n<\/span>date\u7c7b\u578b\u7684key\u5206\u533a<\/span><\/h4>\n\n\n\ncreate table t_key_date(id int, name varchar(100),birth date)\n partition by key(birth)\n (\n partition p01,\n partition p02 \n );\n\ngbase> create table t_key_date(id int, name varchar(100),birth date)\n -> partition by key(birth)\n -> (\n -> partition p01,\n -> partition p02\n -> );\nQuery OK, 0 rows affected (Elapsed: 00:00:00.42)\n<\/code><\/pre>\n\n\n\n<\/span>Hash\u5206\u533a<\/span><\/h3>\n\n\n\n\u5982\u679c\u6ca1\u6307\u5b9a\u5206\u533a\u540d\u5b57\uff0c\u5219\u9ed8\u8ba4\u4ecep0\u5f00\u59cb\u3002\u67e5\u8be2\u65f6\u53ef\u4ee5\u7528 partition(p0,p1)\u8fd9\u6837\u6765\u6307\u5b9a\u5206\u533a\u3002<\/p>\n\n\n\n
<\/span>\u6570\u5b57\u7c7b\u578b\u7684hash\u5206\u533a<\/span><\/h4>\n\n\n\n\u6574\u6570\u5728\u5185\u90e8\uff0c\u5c31\u662f\u6309\u7167\u6570\u5b57\u7684mod\u503c\u8fdb\u884c\u5212\u5206\u3002\u6bd4\u598210\u4e2a\u8282\u70b9\uff0c\u6570\u5b570\u4fdd\u5b58\u5728\u7b2c1\u4e2a\u5206\u533a\uff0c\u6570\u5b579\u4fdd\u5b58\u5728\u7b2c10\u4e2a\u5206\u533a\u3002<\/p>\n\n\n\n
create table t_hash_int(id int, name varchar(100),birth date)\n partition by hash(id)\n (\n partition p01,\n partition p02 \n );\ngbase> create table t_hash_int(id int, name varchar(100),birth date)\n -> partition by hash(id)\n -> (\n -> partition p01,\n -> partition p02\n -> );\nQuery OK, 0 rows affected (Elapsed: 00:00:00.17)\n<\/code><\/pre>\n\n\n\n<\/span>\u5176\u5b83\u7c7b\u578b\u7684hash\u5206\u5e03\u4e0d\u652f\u6301<\/span><\/h4>\n\n\n\ngbase> create table t_hash_varchar(id int, name varchar(100),birth date)\n -> partition by hash(name)\n -> (\n -> partition p01,\n -> partition p02\n -> );\nERROR 1702 (HY000): gcluster table error: The PARTITION function returns the wrong type.\ngbase> create table t_hash_date(id int, name varchar(100),birth date)\n -> partition by hash(birth)\n -> (\n -> partition p01,\n -> partition p02\n -> );\nERROR 1050 (42S01): Table 't_hash_date' already exists\ngbase> drop table t_hash_date;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.04)\n\ngbase> create table t_hash_date(id int, name varchar(100),birth date)\n -> partition by hash(birth)\n -> (\n -> partition p01,\n -> partition p02\n -> );\nERROR 1702 (HY000): gcluster table error: The PARTITION function returns the wrong type.\ngbase>\n<\/code><\/pre>\n\n\n\n<\/span>PARTITIONS num \u6279\u91cf\u5efa\u7acb<\/span><\/h3>\n\n\n\n\u6279\u91cf\u751f\u6210\u4e00\u5b9a\u7684\u5206\u533a\uff0c\u4e0d\u518d\u6307\u5b9a\u5206\u533a\u540d\u5b57\uff0c\u9002\u5408key\u548chash\u5206\u533a\u7c7b\u578b\u3002<\/p>\n\n\n\n
gbase> create table t_key_varchar(id int, name varchar(100),birth date)\n -> partition by key(name)\n -> PARTITIONS 10;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.54)\n<\/code><\/pre>\n\n\n\n<\/span>\u5b50\u5206\u533a<\/span><\/h2>\n\n\n\nkey\u548chash\u4e0d\u80fd\u518d\u6709\u5b50\u5206\u533a\uff0c\u53ea\u5141\u8bb8RANGE\/LIST\u53ef\u4ee5\u62e5\u6709\u5b50\u5206\u533a\uff0c\u5305\u62echash\/key\u5b50\u5206\u533a\u7c7b\u578b\u3002<\/p>\n\n\n\n
\u63d0\u793a\uff1a\u5f53\u524d\u96c6\u7fa4\u7248\u672c\uff0c\u8fd8\u4e0d\u652f\u6301range-list\u8fd9\u6837\u7684\u5b50\u5206\u533a\u683c\u5f0f\uff0c\u5177\u4f53\u5f53\u524d\u6700\u65b0\u7248\u672c\u652f\u6301\u8be6\u60c5\uff0c\u8fd8\u8bf7\u54a8\u8be2\u6570\u636e\u5e93\u5382\u5546\u3002<\/p>\n\n\n\n
<\/span>\u8bed\u6cd5<\/span><\/h3>\n\n\n\n PARTITION BY\n { RANGE(expr)\n | LIST(expr)\n | LINEAR] HASH(expr)\n | [LINEAR] KEY(column_list)}\n [PARTITIONS num]\n \n[SUBPARTITION BY\n { [LINEAR] HASH(expr)\n | [LINEAR] KEY(column_list) }\n [SUBPARTITIONS num]\n ]\n<\/code><\/pre>\n\n\n\n<\/span>\u6837\u4f8b<\/span><\/h3>\n\n\n\n\u5982\u4e0b\u662f\u65e5\u671f\u7c7b\u578b\u7684Range\u5206\u533a\u5e26hash\u7c7b\u578b\u7684\u5b50\u5206\u533a\u7684\u4f8b\u5b50\u3002<\/p>\n\n\n\n
create table t_list_2(id int, name varchar(100),birth date)\n partition by range(birth)\n subpartition by hash(id)\n (\n partition p1357_1980 values less than (to_date('1980-01-01','yyyy-mm-dd'))(\n subpartition a1980,\n subpartition b1980 \n ),\n partition p1357_2000 values less than (to_date('2000-01-01','yyyy-mm-dd'))(\n subpartition a2000,\n subpartition b2000 \n ),\n partition p1357_other values less than MAXVALUE(\n subpartition aother,\n subpartition bother \n )\n );<\/code><\/pre>\n\n\n\n<\/span>SUBPARTITIONS num \u6279\u91cf\u5efa\u7acb<\/span><\/h3>\n\n\n\n\u5bf9\u4e8ekey\u548chash\u7684\u5b50\u5206\u533a\uff0c\u53ef\u4ee5\u6279\u91cf\u5efa\u7acb\uff0c\u4e0d\u6307\u5b9a\u540d\u5b57\u3002<\/p>\n\n\n\n
create table t_range_hash(id int, name varchar(100),birth date)\n partition by range(birth)\n subpartition by hash(id) subpartitions 2\n (\n partition p1357_1980 values less than (to_date('1980-01-01','yyyy-mm-dd')),\n partition p1357_2000 values less than (to_date('2000-01-01','yyyy-mm-dd')),\n partition p1357_other values less than MAXVALUE\n );<\/code><\/pre>\n\n\n\n<\/span>\u589e\u52a0\u5206\u533a<\/span><\/h2>\n\n\n\n\u76ee\u524d\u7248\u672c\u53ea\u6709Range\u548cList\u5206\u533a\u652f\u6301\u589e\u52a0\u5206\u533a<\/p>\n\n\n\n
gbase> show create table td;\nCREATE TABLE \"td\" (\n \"id\" int(11) DEFAULT NULL,\n \"d\" date DEFAULT NULL\n) ENGINE=EXPRESS DEFAULT CHARSET=utf8 TABLESPACE='sys_tablespace'\n PARTITION BY RANGE (d)\n(PARTITION p_20230307 VALUES LESS THAN (20230308) TABLESPACE = 'sys_tablespace' ENGINE = EXPRESS,\n PARTITION p_20230308 VALUES LESS THAN (20230309) TABLESPACE = 'sys_tablespace' ENGINE = EXPRESS) \n\n1 row in set (Elapsed: 00:00:00.01)\n\ngbase> alter table td add partition(partition p_20230309 values less than (20300310));\nQuery OK, 0 rows affected (Elapsed: 00:00:00.28)\nRecords: 0 Duplicates: 0 Warnings: 0\n\ngbase> show create table td;\n\nCREATE TABLE \"td\" (\n \"id\" int(11) DEFAULT NULL,\n \"d\" date DEFAULT NULL\n) ENGINE=EXPRESS DEFAULT CHARSET=utf8 TABLESPACE='sys_tablespace'\n PARTITION BY RANGE (d)\n(PARTITION p_20230307 VALUES LESS THAN (20230308) TABLESPACE = 'sys_tablespace' ENGINE = EXPRESS,\n PARTITION p_20230308 VALUES LESS THAN (20230309) TABLESPACE = 'sys_tablespace' ENGINE = EXPRESS,\n PARTITION p_20230309 VALUES LESS THAN (20300310) TABLESPACE = 'sys_tablespace' ENGINE = EXPRESS) |\n\n1 row in set (Elapsed: 00:00:00.01)\n<\/code><\/pre>\n\n\n\n\u6ce8\u610f\uff0cRange\u5206\u533a\uff0c\u5982\u679c\u8bbe\u5b9a\u4e86Max\u5206\u533a\uff0c\u5219\u4e0d\u80fd\u76f4\u63a5\u589e\u52a0\u5206\u533a\uff0c\u5426\u5219\u6570\u636e\u4f1a\u51fa\u73b0\u91cd\u53e0\u3002\u6bd4\u5982<\/p>\n\n\n\n
CREATE TABLE \"td_max\" (\n \"d\" datetime DEFAULT NULL,\n \"id\" int(11) DEFAULT NULL\n) ENGINE=EXPRESS DEFAULT CHARSET=utf8 TABLESPACE='sys_tablespace'\n PARTITION BY RANGE (d)\n(PARTITION p_20230307 VALUES LESS THAN (20230307000000) TABLESPACE = 'sys_tablespace' ENGINE = EXPRESS,\n PARTITION p_max VALUES LESS THAN MAXVALUE <\/code><\/pre>\n\n\n\n\u53ef\u4ee5\u8003\u8651\u5c06MAXVALUE\u5206\u533a\u5220\u9664\uff0c\u5982\u679c\u6709\u6570\u636e\u3002\u53ef\u4ee5\u5c06MAXVALUE\u5206\u533a\u6570\u636e\u4e34\u65f6\u8fc1\u79fb\u5230\u4e00\u4e2a\u8868\u91cc\uff0c\u7136\u540e\u5220\u9664MAXVALUE\u5206\u533a\uff0c\u5efa\u597d\u5206\u533a\u540e\uff0c\u518d\u628a\u6570\u636e\u8fc1\u79fb\u8fc7\u6765\u3002<\/p>\n\n\n\n
create table tmp as select * frm td_max partition(p_max);\nalter table td_max drop partition p_max;\nalter table add partition ....\ninsert into td_max select * from tmp;\ndrop table tmp;<\/code><\/pre>\n\n\n\n<\/span>\u5220\u9664\u5206\u533a<\/span><\/h2>\n\n\n\nalter table td_max drop partition p_max;<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5357\u5927\u901a\u7528GBase 8a\u6570\u636e\u5e93\u96c6\u7fa4\uff0c\u4eceV9\u7248\u672c\u624d\u652f\u6301\u5206\u533a\u529f\u80fd\uff0cV8\u4e0d\u652f\u6301\u5206\u533a\u3002\u5206\u533a\u7c7b\u578b\u652f\u6301range,list,key\u548chash\u56db\u79cd\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,4],"tags":[80,60],"class_list":{"0":"post-341","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-gbase8a","8":"tag-80","9":"tag-v95"},"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/341","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=341"}],"version-history":[{"count":48,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/341\/revisions"}],"predecessor-version":[{"id":11326,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/341\/revisions\/11326"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=341"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=341"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}