num integer, modified timestamp default current_timestamp ); create trigger t_name before update on ts for each row execute procedure upd_timestamp(); 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 2、自增ID有两种方法: 1、字段类型:serial 2、int类型需...
-> ts TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,-> PRIMARY KEY (id)-> );Query OK, 0 rows affected (0.02 sec)mysql> REPLACE INTO test VALUES (1, 'Old', '2014-08-20 18:47:00');Query OK, 1 row affected (0.00 sec)mysql> SELECT...
update_time timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, create_time timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, CONSTRAINT tb_aa_pk PRIMARY KEY (id) ) partition by range(id); 1. 2. 3. 4. 5. 6. 7. 8. 2.创建子分区表 create table tb_aa_20210907 partition of tb_aa for values ...
=#CREATETABLEjust_for_fun(last_updated timestamptz);=#INSERTINTOjust_for_fun(last_updated)VALUES(now());=#UPDATEjust_for_funSETlast_updated=now(); 1.2 执行pg_basebackup 代码语言:javascript 代码运行次数:0 运行 AI代码解释 =$ mkdir/var/tmp/backups;pg_basebackup-D/var/tmp/backups=$ ls-l...
capture_time datetime not null DEFAULT CURRENT_TIMESTAMP ) comment 'pg autovacuum 监控'; -- 加个唯一索引和时间列索引 alter table db_pg_autovacuum_monitoring add unique key uniq_union(instance_cluster ,dbname,schemaname,relname,last_autovacuum ); ...
sq_datetime:=to_timestamp(current_date||' '||current_time,'yyyy-mm-dd hh24:mi:ss') ; seq_sql:='INSERT INTO _sequence_table( code,increment_num,minvalue_num,start_num, cache_num,create_datetime) VALUES ( '''||sq_name||''',1,1000000,1000000, 30,'''||sq_datetime||''');';...
#CREATE TRIGGERexample_triggerAFTER INSERT ON COMPANYFOR EACHROW EXECUTE PROCEDURE auditlogfunc(); CREATEORREPLACEFUNCTIONauditlogfunc()RETURNSTRIGGERAS$example_table$BEGININSERTINTOAUDIT(EMP_ID, ENTRY_DATE)VALUES(new.ID,current_timestamp);RETURNNEW;END; ...
net.ipv4.tcp_timestamps = 1 # 减少time_wait net.ipv4.tcp_tw_recycle = 0 # 如果=1则开启TCP连接中TIME-WAIT套接字的快速回收,但是NAT环境可能导致连接失败,建议服务端关闭它 net.ipv4.tcp_tw_reuse = 1 # 开启重用。允许将TIME-WAIT套接字重新用于新的TCP连接 ...
可以通过 SET TIME ZONE命令设置当前会话的时区 mydb=# create table test_datetime ( ts timestamp, tstz timestamp with time zone, period interval ); mydb=# \d test_datetime; Table "public.test_datetime" Column | Type | Collation | Nullable | Default ---+---+---+---+--- ts | tim...
for local change, get the current timestamp as the row timestamp for remote change, get the row timestamp in__pgcat_lww for inline columns, compare the row timestamp for each individual column, compare its own timestamp for counter column, store the remote change in__pgcat_lww, use ...