cat>/tmp/create_part.sh<<EOF dateStr=\$(date -d '+1 days' +%Y%m%d); psql -c "CREATE TABLE tab_\$dateStr (LIKE tab INCLUDING INDEXES); ALTER TABLE tab ATTACH PARTITION tab_\$dateStr FOR VALUES IN ('\$dateStr')"; EOF (crontab -l2>/dev/null;echo"0 14 * * * bash /tmp/...
sql CREATE TABLE measurement ( city_id int not null, logdate date not null, peaktemp int, unitsales int ) PARTITION BY RANGE (logdate); 3. 创建默认分区,并指定分区名称、继承自主表、以及分区约束条件 使用DEFAULT子句来创建默认分区,它不需要指定FOR VALUES子句: sql CREATE TABLE measurement_defau...
AI代码解释 postgres=# create tabletpart_hash(a int primary key,b text)partition byhash(a)configuration(modulus5);CREATETABLEpostgres=# \d+tpart_hash Partitioned table"public.tpart_hash"Column|Type|Collation|Nullable|Default|Storage|Stats target|Description---+---+---+---+---+---+---+...
CREATE TABLE people\_y2000 PARTITION OF people FOR VALUES FROM ('2000-01-01') TO ('2001-01-01'); CREATE TABLE people\_y2001 PARTITION OF people FOR VALUES FROM ('2001-01-01') TO ('2002-01-01'); CREATE TABLE people\_y2002 PARTITION OF people FOR VALUES FROM ('2002-01-01') T...
1、创建一个有DEFAULT的分区表 1、先创建主表 createtabletbl_log ( id serial, create_timetimestamp(0)withouttimezone, remarkchar(1) )PARTITIONBYRANGE(create_time); #因为是serial类型,自增的所以会自动创建一个序列 postgres=# \d Listofrelations ...
CREATETABLEmeasurement_default PARTITIONOFmeasurementDEFAULT; 七、分区表不能自动建,怎么办? 方法1:利用定时器,定时某段时间创建分区表,可以利用操作系统定时器或者程序里面的定时任务,但是太麻烦,弃用。 方法2:编写存储过程脚本,一次性生成未来3年,未来10年的多个分区表,下面给出存储过程的脚本。这不是最优解,后面...
CREATE TABLE "public"."three_height_data_value" ( "data_id" varchar(64) COLLATE "pg_catalog"."default" NOT NULL, "data_time" timestamp(6) NOT NULL, "data_value" float8 NOT NULL ); 1. 2. 3. 4. 5. 2. 创建存储过程 创建存储过程,使用动态SQL, 将大表分区的运维操作实现自动化。
不支持默认分区( Default Partition) 分区键字段的UPDATE限制:对分区字段的修改不能导致该记录从一个分区迁移到另一个分区 语法: 1、创建分区表(父表) CREATE TABLE table_name ( ... ) [ PARTITION BY { RANGE | LIST } ( { column_name | ( expression ) } ...
create table log_history_2021_04 partition of log_history_2021forvalues from ('2021-09-01') to ('2021-12-31'); 查看表定义查看分区 postgres=# \d+ log_history;Partitioned table"public.log_history"Column | Type | Collation | Nullable | Default | Storage | Stats target | Description ...
CREATETABLEuserinfo ( userid int4, usernamecharactervarying(64), ctimetimestamp(6)withouttimezone )PARTITIONBYHASH(userid); 创建子表 CREATETABLEuserinfo_p0PARTITIONOFuserinfoFORVALUESWITH(MODULUS4, REMAINDER0);CREATETABLEuserinfo_p1PARTITIONOFuserinfoFORVALUESWITH(MODULUS4, REMAINDER1);CREATETABLEuserinfo_...