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用d_ba_objects来创建测试大表的方法

发布时间:2020-08-01 21:42:20

  个人实验的时候有时会用到一些大表,在此分享用dba_obje

中国未解之谜[www.9-39.com/html/mystery/]cts来创建测试大表的方法:

  首先建立测试表

  [email protected]>create table test nologging as select rownum id,a.* from dba_objects a where 1=2;

  Table created.

  插入500万条数据:

  [email protected]>declare

  l_cnt number;

  l_rows number:=&1;

  begin

  insert into test select rownum,a.* from dba_objects a;

  l_cnt:=sql%rowcount;

  commit;

  while(l_cnt

  loop

  insert into test select rownum+l_cnt,

  owner,object_name,subobject_name,

  object_id,data_object_id,

  object_type,created,last_ddl_time,

  timestamp,status,temporary,

  generated,secondary

  from sales

  where rownum<=l_rows-l_cnt;

  l_cnt:=l_cnt+sql%rowcount;

  commit;

  end loop;

  end; 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

  22 /

  Enter value for 1: 5000000

  old 3: l_rows number:=&1;

  new 3: l_rows number:=5000000;

  PL/SQL procedure successfully completed.

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