2026-03-12 21:01:38

materialized_views/mw01.txt

@@ -0,0 +1,70 @@
+create pluggable database NIHILUS admin user NIHILUS$OWNER identified by secret;
+alter pluggable database NIHILUS open;
+alter pluggable database NIHILUS save state;
+
+orapwd file=orapwSITHPRD password="ad420e57a205c9a7d80d!"
+
+alias NIHILUS='rlwrap sqlplus adm/"secret"@bakura:1521/NIHILUS as sysdba'
+
+alter session set container=NIHILUS;
+
+create user DEMO identified by secret;
+grant connect, resource to DEMO;
+grant create materialized view to DEMO;
+grant create view to DEMO;
+grant unlimited tablespace to DEMO;
+
+alias DEMO='rlwrap sqlplus DEMO/"secret"@bakura:1521/NIHILUS'
+
+create table DEMO as 
+  select 0 seq,current_timestamp now 
+     from 
+     xmltable('1 to 1000');
+
+
+-- infinite_update.sql
+whenever sqlerror exit failure
+begin
+   loop 
+     update demo set seq=seq+1,now=current_timestamp where rownum=1;
+     commit; 
+     dbms_session.sleep(1);
+   end loop;
+end;
+/
+
+
+select max(seq),max(now) from DEMO.DEMO;
+create materialized view DEMOMV1 as select * from DEMO;
+create materialized view DEMOMV2 as select * from DEMO;
+
+create view V as
+              select 'DEMOMV1' source,seq,now from DEMOMV1
+              union all
+              select 'DEMOMV2' source,seq,now from DEMOMV2
+              union all              
+              select 'DEMO' source,seq,now from DEMO;
+
+set lines 256
+col maxseq for 999999999
+col maxnow for a50
+
+select source,max(seq) maxseq,max(now) maxnow from V group by source;
+
+
+exec dbms_refresh.make('DEMO.DEMORGROUP', list=>'DEMOMV1,DEMOMV2', next_date=>null, interval=>'null');
+
+exec dbms_refresh.refresh('DEMO.DEMORGROUP');
+
+-- we can index and gather stats on materialized views
+create index IMV1 on DEMOMV1(seq);
+create index IMV2 on DEMOMV2(now);
+
+exec dbms_stats.gather_table_stats(user,'DEMOMV1', method_opt=>'for all columns size SKEWONLY');
+exec dbms_stats.gather_table_stats(user,'DEMOMV2', method_opt=>'for all columns size AUTO');
+
+alter table DEMO add constraint PK_DEMO primary key (NOW);
+
+create materialized view log on DEMO.DEMO
+	including new values;
+