复制 DO$$BEGINEXECUTE'CREATE TABLE IF NOT EXISTS orders_'||EXTRACT(YEARFROMCURRENT_DATE+INTERVAL'1 year')||' PARTITION OF orders FOR VALUES FROM ('''||CURRENT_DATE+INTERVAL'1 year'||''') TO ('''||CURRENT_DATE+INTERVAL'2 years'||''')';END$$; 通过这种方式,每年年初会自动生成新一...
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/create_part.sh ")|crontab- 使用数据库内置调度器,如 pg_cron、pg_timetable 以p...
EXECUTE 'CREATE TABLE IF NOT EXISTS orders_' || EXTRACT(YEAR FROM CURRENT_DATE + INTERVAL '1 year') || ' PARTITION OF orders FOR VALUES FROM (''' || CURRENT_DATE + INTERVAL '1 year' || ''') TO (''' || CURRENT_DATE + INTERVAL '2 years' || ''')'; END $$; 1. 2. 3...
Partitionedtable"public.tbl_log"Column|Type|Collation|Nullable|Default---+---+---+---+---id|integer||notnull|nextval('tbl_log_id_seq'::regclass) create_time|timestamp(0)withouttimezone||notnull|remark|character(1)|||name|charactervarying(2)|||Partitionkey:RANGE(create_time) Indexes: ...
CREATE TABLE my_partitioned_table ( id serial primary key, data text, partition_key int ) PARTITION BY HASH (partition_key); 1. 2. 3. 4. 5. 在这个例子中,my_partitioned_table是主表,partition_key是分区键。 创建分区: 接下来,你需要创建实际的分区。在基于哈希的分区中,你可以创建任意数量的...
CREATE TABLE 表名 ( [{ 列名称 数据_类型} [, … ] ] ) PARTITION BY LIST( { 列名称 } ); 创建分区语法: CREATE TABLE 表名 PARTITION OF 主表 FOR VALUES IN ( 表达式 [, …] ) [ TABLESPACE 表空间名 ]; 示例: postgres=#CREATETABLEsales (product_idint, saleroomint, province text)PARTI...
PostgreSQL的分区表(Table Partitioning)可以用来解决此类问题。解决方式是:创建一个表orders,作为分区表(partitionedtable),再创建50个分区(partition),orders_1, orders_2, …, orders_50, 每一个分区对应一个州的数据,分区的数据量平均是1G。分区表和分区都是表。本例中,这50分区联合在一起,组成分区表orders。
def create_sub_table(db, table): # Get current date d1 = date.today() # Get next month's date d2 = d1 + relativedelta(months=+1) # Get the 1st day of the next month;As the starting value of the partitioned table start_date = get_next_month_first_day(d1) ...
-- Create the partitioned tableCREATETABLEcustomers ( id SERIAL, nameVARCHAR(100), countryVARCHAR(100) )PARTITIONBYLIST (country);-- Create partitionsCREATETABLEcustomers_usaPARTITIONOFcustomersFORVALUESIN('USA');CREATETABLEcustomers_ukPARTITIONOFcustomersFORVALUESIN('UK');CREATETABLEcustomers_canadaPARTITI...
CREATE TABLE tbl_log ( id serial, user_id int4, create_time timestamp(0) without time zone ) PARTITION BY RANGE(create_time); --创建子表CREATE TABLE tbl_log_his PARTITION OF tbl_log FOR VALUES FROM (minvalue) TO ('2020-01-01'); ...