这样可以减少单个表的数据量,提高插入性能。示例代码: CREATE TABLE partitioned_table (LIKE table_name INCLUDING CONSTRAINTS) PARTITION BY RANGE (partition_key); CREATE TABLE partition_1 PARTITION OF partitioned_table FOR VALUES FROM (min_value) TO (max_value); INSERT INTO partitioned_table SELECT ...
create table log_par_202107 partition of log_par for values from ('2021-07-01') to ('2021-08-01'); create table log_par_202108 partition of log_par for values from ('2021-08-01') to ('2021-09-01'); create table log_par_202109 partition of log_par for values from ('2021-09...
postgres=# create table test_2 partition of test for values from (10) to (100); CREATE TABLE postgres=# create table test_3 partition of test for values from (100) to (1000); CREATE TABLE postgres=# create table test_4 partition of test for values from (1000) to (10000); CREATE T...
CREATE TABLE partitioned_table ( CHECK (condition), LIKE parent_table INCLUDING ALL ) INHERITS (parent_table); 创建触发器:创建一个触发器,当向父表插入数据时,它将自动将数据复制到正确的子表中。 代码语言:txt 复制 CREATE OR REPLACE FUNCTION insert_into_child_table() RETURNS TRIGGER AS $$ BEGIN...
The following creates the partitioned table in PostgreSQL or EDB Postgres Advanced Server using table inheritance: → WrapCopy --- Create the parent table--CREATETABLEemp(empnoNUMERIC(4)NOTNULLCONSTRAINTemp_pkPRIMARYKEY,enameVARCHAR(10),jobVARCHAR(9),mgrNUMERIC(4),hiredateDATE,salNUMERIC(7,2),...
In this article, we create a partitioned table in Postgres and demonstrate how the optimizer can use it to improve query performance. Three Partitioning Methods Postgres provides three built-in partitioning methods: Range Partitioning: Partition a table by a range of values. This is commonly used...
CREATE TABLE "GPO".count_perion_days_lottery_201912 ( CONSTRAINT count_perion_days_lottery_201912_pkey PRIMARY KEY (id), CONSTRAINT count_perion_days_lottery_201912_no_uq UNIQUE (account_id, create_time, lottery_id), CONSTRAINT count_perion_days_lottery_201912_create_time_check CHECK (create_...
PARTITIONOFparent_localVALUESFROM1000TO2000SERVER postgres_svr1 OPTIONS table_name'child_local1');CREATEFOREIGNTABLEparent_remote2 PARTITIONOFparent_localFORVALUESFROM2000TO3000SERVER postgres_svr2 OPTIONS table_name'child_local2'); 看看计划树,现在你可以在计划树中看到两个异步的外部扫描计划。
Create a hash partitioned table based on customer IDs CREATE TABLE orders ( id SERIAL, order_date DATE, customer_id INT, amount NUMERIC, -- Other columns ) PARTITION BY HASH (customer_id); Create individual partitions using hash partitioning ...
ERROR: cannot attach foreign table "moscow" as partition of partitioned table "test" DETAIL: Table "test" contains unique indexes. SQL state: 42809 我从login列中删除了唯一约束,但它显示了相同的错误。 当我使分区表具有相同的属性并且两个分区最初都位于同一服务器上时,除了postgres注意login唯一性per...