ON COMMIT DELETE ROWS; CREATE GLOBAL TEMPORARY TABLE MyTempTable 所建的临时表虽然是存在的,但是你试一下insert 一条记录然后用别的连接登上去select,记录是空的,明白了吧,我把下面两句话再贴一下: --ON COMMIT DELETE ROWS 说明临时表是事务指定,每次提交后ORACLE将截断表(删除全部行) --ON COMMIT PRESERVE...
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 older than 1 hour 为了定期调用这个expire_rows程序。可以使用...
EXCLUDING IDENTITY COLUMN ATTRIBUTES ON COMMIT DELETE ROWS NOT LOGGED IN 临时表空间名with replace; 第一行規定臨時表的名稱. 第二行規定臨時表的列的定義. 第三行規定不是從源結果表定義中復制的恒等列. 第四行規定如果沒有打開WITH GOLD光標,將會刪除表的所有行. 第五行規定不對表的改變進行記錄. With r...
# linux的默认配置,书上推荐使用csv格式#log_destination = 'stderr' # Valid values are combinations of# stderr, csvlog, jsonlog, syslog, and# eventlog, depending on platform.# csvlog and jsonlog require# logging_collector to be on.# This is used when logging to stderr:logging_collector =...
rows_20250317(likemytable);begin;setlocalsession_replication_role='replica';withgoodrowsas(selectmin(ctid)frommytablegroupbyid),mydeleteas(deletefrommytablewherenotexists(select1fromgoodrowswheremin=ctid)returning*)insertintomytable_duperows_20250317select*frommydelete;resetsession_replication_role;commit;...
begin;setlocalsession_replication_role='replica';withgoodrowsas(selectmin(ctid)fromTEST_mytablegroupbyid),mydeleteas(deletefromTEST_mytablewherenotexists(select1fromgoodrowswheremin=ctid)returning*)insertintoTEST_mytable_duperows_20250317select*frommydelete;reset session_replication_role;commit; ...
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 older than 1 hour 然而事实是,大多数现代应用程序不再依赖存...
GRANT ALL ON TABLE "GPO".count_perion_days_lottery_201912 TO "GPO"; GRANT UPDATE, DELETE, INSERT, SELECT ON TABLE "GPO".count_perion_days_lottery_201912 TO "GPO_agent"; GRANT UPDATE, INSERT, SELECT, DELETE ON TABLE "GPO".count_perion_days_lottery_201912 TO "GPO_member"; ...
CREATE[GLOBALTEMPORARY|UNLOGGED]TABLE({<column_name><data_type>[DEFAULT<default_expr>][<column_constraint>[...]]|}[,...])[WITH(ROWIDS[=<value>])][ONCOMMIT{ PRESERVEROWS|DELETEROWS}][TABLESPACE<tablespace>]{ NOPARALLEL|PARALLEL[<integer>]} Wherecolumn_constraintis: → Wrap...
CREATEORREPLACEPROCEDURE expire_rows (retention_period INTERVAL) AS$$BEGINDELETEFROMcacheWHERE inserted_at < NOW() - retention_period;COMMIT;END;$$ LANGUAGE plpgsql;CALL expire_rows('60 minutes'); -- This will remove rows older than 1 hour然而事实是，大多数现代应用程序不再依赖存储过程，而且...