-c COMMAND或--command=COMMAND执行单条SQL命令后退出。例如:psql -c "SELECT * FROM mytable;" -f FILE或--file=FILE执行指定文件中的SQL命令集后退出。 -l或--list列出服务器上所有可用的数据库。 -v VARNAME=value或--set=VARNAME=value设置一个变量,可以在SQL脚本中引用。
# Note: The above parameterisextractedas"host all all 0.0.0.0/0 trust". If you don't want# such setups, specify the value () tothisvariable and suplly what you wantusingcoordExtraPgHba # and/or coordSpecificExtraPgHba variables. #coordPgHbaEntries=(::1/128) # Sameasabove butforIPv6...
因此,Stephan甚至更进一步建议我们使用ChatGPT来编写存储过程。 CREATE OR REPLACE PROCEDURE expire_rows (retention_period INTERVAL) AS$$BEGIN DELETE FROM cache WHERE inserted_at < NOW() - retention_period; COMMIT;END;$$ LANGUAGE plpgsql; CALL expire_rows('60 minutes'); -- This will remove rows ...
MariaDB[test]>create table company(id int not null primary key,name varchar(50),addr varchar(255)); Query OK,0 rows affected (0.165sec) MariaDB[test]>insert into company values(1,"facebook","usa"); Query OK,1 row affected (0.062sec) MariaDB [test]>select * from company; +---+-...
('new_name1'); insert into new_test(name) values('new_name1'); #查询数据信息 select * from new_test; testdb=> select * from new_test; id | name ---+--- 1 | new_name1 2 | new_name1 3 | new_name1 (3 rows) #可以看到已经能正常写入数据了 #在新主库上设置主从同步用户权限...
RemovePgTempFiles(); 6.测试: 1.创建乱序数据。 create table sort_random(id int, info text, tm timestamp default now()); insert into sort_random(id, info) select 10000000*random(), random_string(64) from generate_series(1,1000000); ...
(2 rows) 有数据的先回收数据 postgres=# ALTER TABLE disttab DELETE NODE (dn3); ALTER TABLE postgres=# ALTER TABLE repltab DELETE NODE (dn3); ALTER TABLE postgres=# SELECT * FROM pgxc_class WHERE nodeoids::integer[] @> ARRAY[16397]; ...
The PostgreSQL 16 query planner will now consider usingMemoizewhen aUNION ALLquery appears on the inner side of a parameterizedNested Loop. -- SetupCREATETABLEt1(aINTPRIMARYKEY);CREATETABLEt2(aINTPRIMARYKEY);CREATETABLElookup(aINT);INSERTINTOt1SELECTxFROMgenerate_Series(1...
Version 3 of the “Activity Book for Postgres” is hot off the press. And you can get your own copy if you come say hello at the Microsoft booth at the PGConf NYC and PGConf EU conferences in 2023. The...
Usually, when we attach a table as a partition, the table is scanned to check if it contains any rows which would not fit that partition (to be specific, would not fit that partition's bounds). This scan is avoided if the table has constraint/s that imply the partition bounds. By ret...