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- Cora Mitchell
- 5 years ago
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1
2 About me Patrick Barel Working with Oracle since 1997 Working with PL/SQL since 1999 Playing with APEX since 2003 (mod_plsql) ACE since 2011 OCA since December 20 th 2012 OCP since February 20 th 2014 Developer Choice Award
3 Read me simple-talk/author/ patrick-barel/ bar-solutions.com/ otechmagazine.php 3 Get to know your program by instrumentation
4 Download me Plugins for PL/SQL Developer Plugins for Apex 4
5 Watch me 5
6 Contact Patrick Barel 6
7 500+ Technical Experts Helping Peers Globally 3 Membership Tiers Oracle ACE Director Oracle ACE Oracle ACE Associate bit.ly/oracleaceprogram Connect: oracle-ace_ww@oracle.com Nominate yourself or someone you know: acenomination.oracle.com
8 Get Your Moneys Worth Out Of Your Database Patrick Barel, Qualogy
9 It doesn t matter how many resources you have. If you don t know how to use them, it will never be enough
10 Database 10
11 Data integrity/quality Klik om de stijl te bewerken
12 Data integrity/quality create table demo.emp_unprotected ( empno number(4) not null, ename varchar2(10), sal number(7,2), deptno number(2) ) 12
13 Data integrity/quality insert into demo.emp_unprotected values (7369, 'SMITH', 800, 20); insert into demo.emp_unprotected values (7499, 'ALLEN', 1600, 30); insert into demo.emp_unprotected values (7521, 'WARD', 1250, 30); insert into demo.emp_unprotected values (7566, 'JONES', 2975, 20); insert into demo.emp_unprotected values (7900, 'JAMES', 950, 30); insert into demo.emp_unprotected values (7902, 'FORD', 3000, 20); insert into demo.emp_unprotected values (7934, 'MILLER', 1300, 10); 13
14 Data integrity/quality Salary not over 7500 No duplicate employee numbers Existing department update demo.emp_unprotected e set e.sal = 2 * e.sal insert into demo.emp_unprotected (empno, ename, sal, deptno) values (7900, 'BAREL', 1000, 10) update demo.emp_unprotected e set e.deptno = 50 where e.ename = 'SCOTT' 14
15 Data integrity/quality Salary not over 7500 No duplicate employee numbers Existing department alter table demo.emp_protected add constraint sal_under_7500 check ((sal < 7500)) alter table demo.emp_protected add constraint pk_emp_protected primary key (empno) alter table demo.emp_protected add constraint fk_emp_protected_dept foreign key (deptno) references demo.dept (deptno) update demo.emp_protected e set e.sal = 2 * e.sal insert into demo.emp_protected (empno, ename, sal, deptno) values (7900, 'BAREL', 1000, 10) update demo.emp_protected e set e.deptno = 50 where e.ename = 'SCOTT' dataintegrity.sql 15
16 Flashback queries
17 Flashback queries create table emp_fb ( empno NUMBER(4) not null, ename VARCHAR2(10), sal NUMBER(7,2), deptno NUMBER(2) ) 17
18 Flashback queries insert into emp_fb values (7782, 'CLARK', 2450, 10); insert into emp_fb values (7788, 'SCOTT', 3000, 20); insert into emp_fb values (7839, 'KING', 5000, 10); insert into emp_fb values (7844, 'TURNER', 1500, 30); insert into emp_fb values (7876, 'ADAMS', 1100, 20); insert into emp_fb values (7900, 'JAMES', 950, 30); insert into emp_fb values (7902, 'FORD', 3000, 20); insert into emp_fb values (7934, 'MILLER', 1300, 10); 18
19 Flashback queries EMPNO ENAME SAL CLARK KING MILLER select e.empno, e.ename, e.sal from emp_fb e where e.deptno = 10 19
20 Flashback queries EMPNO ENAME SAL CLARK KING MILLER select e.empno, e.ename, e.sal from emp_fb e where e.deptno = 10 EMPNO ENAME SAL CLARK KING MILLER select e.empno, e.ename, e.sal from emp_fb e where e.deptno = 10 update emp_fb e set e.sal = e.sal where e.deptno = 10 20
21 Flashback queries EMPNO ENAME SAL CLARK KING MILLER select e.empno, e.ename, e.sal from emp_fb e where e.deptno = 10 EMPNO ENAME SAL CLARK KING MILLER select e.empno, e.ename, e.sal from emp_fb e where e.deptno = 10 update emp_fb e set e.sal = e.sal where e.deptno = 10 commit 21
22 Flashback queries truncate table emp_fb insert into emp_fb values (7782, 'CLARK', 2450, 10); insert into emp_fb values (7788, 'SCOTT', 3000, 20); insert into emp_fb values (7839, 'KING', 5000, 10); insert into emp_fb values (7844, 'TURNER', 1500, 30); insert into emp_fb values (7876, 'ADAMS', 1100, 20); insert into emp_fb values (7900, 'JAMES', 950, 30); insert into emp_fb values (7902, 'FORD', 3000, 20); insert into emp_fb values (7934, 'MILLER', 1300, 10); 22
23 Flashback queries EMPNO ENAME SAL CLARK KING MILLER select e.empno, e.ename, e.sal from emp_fb e where e.deptno = 10 23
24 Flashback queries EMPNO ENAME SAL CLARK KING MILLER select e.empno, e.ename, e.sal from emp_fb e where e.deptno = 10 update emp_fb e set e.sal = e.sal where e.deptno = 10 24
25 Flashback queries EMPNO ENAME SAL CLARK KING MILLER select e.empno, e.ename, e.sal from emp_fb e where e.deptno = 10 update emp_fb e set e.sal = e.sal where e.deptno = 10 commit 25
26 Flashback queries EMPNO ENAME SAL CLARK KING MILLER select e.empno, e.ename, e.sal from demo.emp_fb as of timestamp to_timestamp(sysdate - 1/(24*60*60)) e where e.deptno = 10 26
27 Flashback queries EMPNO ENAME SAL CLARK KING MILLER select e.empno, e.ename, e.sal from demo.emp_fb as of timestamp to_timestamp(sysdate - 1/(24*60*60)) e where e.deptno = 10 select e.empno, e.ename, e.sal from demo.emp_fb as of scn e where e.deptno = 10 flashback_fb1.sql flashback_fb2.sql flashback_fb3.sql 27
28 Temporal validity
29 Temporal validity create table demo.employees ( id number, name varchar2(30), address varchar2(30) ) 29
30 Temporal validity ID NAME ADDRESS Patrick Edisonbaan 15 2 Steven 57 Chicago Boulevard insert into demo.employees (id, name, address) values (1, 'Patrick', 'Edisonbaan 15') insert into demo.employees (id, name, address) values (2, 'Steven', '57 Chicago Boulevard') select * from demo.employees c order by c.id 30
31 Temporal validity ID NAME ADDRESS Patrick De Bruyn Kopsstraat 9 2 Steven 57 Chicago Boulevard update demo.employees c set c.address = 'De Bruyn Kopsstraat 9' where c.id = 1 select * from demo.employees c order by c.id 31
32 Temporal validity ID NAME ADDRESS Patrick Edisonbaan 15 2 Steven 57 Chicago Boulevard truncate table demo.employees insert into demo.employees (id, name, address) values (1, 'Patrick', 'Edisonbaan 15') insert into demo.employees (id, name, address) values (2, 'Steven', '57 Chicago Boulevard') select * from demo.employees c order by c.id alter table demo.employees add period for valid_time 32
33 Temporal validity ID NAME ADDRESS Patrick Edisonbaan 15 2 Steven 57 Chicago Boulevard truncate table demo.employees insert into demo.employees (id, name, address) values (1, 'Patrick', 'Edisonbaan 15') insert into demo.employees (id, name, address) values (2, 'Steven', '57 Chicago Boulevard') select * from demo.employees c order by c.id alter table demo.employees add period for valid_time 33
34 Temporal validity ID NAME ADDRESS VALID_FROM VALID_TILL Patrick Edisonbaan 15 2 Steven 57 Chicago Boulevard select c.id, c.name, c.address, to_char(c.valid_time_start, 'MM-DD-YYYY') valid_from, to_char(c.valid_time_end, 'MM-DD-YYYY') valid_till from demo.employees c order by c.id 34
35 Temporal validity ID NAME ADDRESS VALID_FROM VALID_TILL Patrick Edisonbaan Steven 57 Chicago Boulevard select c.id, c.name, c.address, to_char(c.valid_time_start, 'MM-DD-YYYY') valid_from, to_char(c.valid_time_end, 'MM-DD-YYYY') valid_till from demo.employees c order by c.id update demo.employees c set c.valid_time_end = to_date(' ', 'MMDDYYYY HH24MISS') where c.id = 1 35
36 Temporal validity ID NAME ADDRESS VALID_FROM VALID_TILL Patrick Edisonbaan Patrick Steven De 57 Chicago Bruyn Kopsstraat Boulevard Steven 57 Chicago Boulevard select c.id, c.name, c.address, to_char(c.valid_time_start, 'MM-DD-YYYY') valid_from, to_char(c.valid_time_end, 'MM-DD-YYYY') valid_till from demo.employees c order by c.id update demo.employees c set c.valid_time_end = to_date(' ', 'MMDDYYYY HH24MISS') where c.id = 1 insert into demo.employees(id, name, address, valid_time_start) values (1,'Patrick','De Bruyn Kopsstraat 9',to_date(' ','MMDDYYYY')) 36
37 Temporal validity ID NAME ADDRESS VALID_FROM VALID_TILL Patrick De Bruyn Kopsstraat Steven 57 Chicago Boulevard select c.id, c.name, c.address, to_char(c.valid_time_start, 'MM-DD-YYYY') valid_from, to_char(c.valid_time_end, 'MM-DD-YYYY') valid_till from demo.employees c order by c.id exec dbms_flashback_archive.enable_at_valid_time('current') 37
38 Temporal validity ID NAME ADDRESS VALID_FROM VALID_TILL Patrick De Edisonbaan Bruyn Kopsstraat Steven 57 Chicago Boulevard select c.id, c.name, c.address, to_char(c.valid_time_start, 'MM-DD-YYYY') valid_from, to_char(c.valid_time_end, 'MM-DD-YYYY') valid_till from demo.employees c order by c.id exec dbms_flashback_archive.enable_at_valid_time('current') exec dbms_flashback_archive.enable_at_valid_time('asof', to_date(' ','mmddyyyy')) 38
39 Temporal validity ID NAME ADDRESS VALID_FROM VALID_TILL Patrick De Edisonbaan Bruyn Kopsstraat Steven 57 Chicago Boulevard select c.id, c.name, c.address, to_char(c.valid_time_start, 'MM-DD-YYYY') valid_from, to_char(c.valid_time_end, 'MM-DD-YYYY') valid_till from demo.employees c order by c.id exec dbms_flashback_archive.enable_at_valid_time('current') exec dbms_flashback_archive.enable_at_valid_time('asof', to_date(' ','mmddyyyy')) exec dbms_flashback_archive.enable_at_valid_time('asof', to_date(' ','mmddyyyy')) 39
40 Temporal validity 40 ID NAME ADDRESS VALID_FROM VALID_TILL Patrick De Edisonbaan Bruyn Kopsstraat Patrick Steven De 57 Chicago Bruyn Kopsstraat Boulevard Steven 57 Chicago Boulevard select c.id, c.name, c.address, to_char(c.valid_time_start, 'MM-DD-YYYY') valid_from, to_char(c.valid_time_end, 'MM-DD-YYYY') valid_till from demo.employees c order by c.id exec dbms_flashback_archive.enable_at_valid_time('current') exec dbms_flashback_archive.enable_at_valid_time('asof', to_date(' ','mmddyyyy')) exec dbms_flashback_archive.enable_at_valid_time('asof', to_date(' ','mmddyyyy')) exec dbms_flashback_archive.enable_at_valid_time('all') temporal_validity.sql
41 Data security
42 Data redaction SensitiveData(Clear) SensitiveData(Redacted) XXXX-XXXX-XXXX-4444 XXXX-XXXX-XXXX-5100 XXXX-XXXX-XXXX-1118 SensitiveData
43 Data redaction create table SensitiveData (contract varchar2(23)) insert into SensitiveData(contract) values (' '); insert into SensitiveData(contract) values (' '); insert into SensitiveData(contract) values (' '); 43
44 Data redaction begin dbms_redact.add_policy( object_schema => 'DEMO',object_name => 'SENSITIVEDATA',policy_name => 'PARTIALMASKDEMO',column_name => 'CONTACT',function_type => DBMS_REDACT.PARTIAL,function_parameters => 'VVVVFVVVVFVVVVFVVVV,VVVV-VVVV-VVVV-VVVV,X,1,12',expression => q'[sys_context ('USERENV', 'SESSION_USER') <> 'BU']'); end; 44
45 Data redaction begin dbms_redact.add_policy( object_schema => 'DEMO',object_name => 'SENSITIVEDATA',policy_name => 'PARTIALMASKDEMO',column_name => 'CONTACT',function_type => DBMS_REDACT.PARTIAL,function_parameters => 'VVVVFVVVVFVVVVFVVVV,VVVV-VVVV-VVVV-VVVV,X,1,12',expression => q'[sys_context ('USERENV', 'SESSION_USER') <> 'BU']'); end; 45
46 Data redaction select * from demo.sensitivedata select * from demo.sensitivedata CONTRACT CONTRACT XXXX-XXXX-XXXX-4444 XXXX-XXXX-XXXX-5100 XXXX-XXXX-XXXX redaction.sql
47 Virtual private database 47
48 Virtual private database 48
49 Virtual private database create or replace function vpdfunc (schemaname_in in varchar2,tablename_in in varchar2) return varchar2 is l_returnvalue varchar2(2000); begin case user when 'BU' then l_returnvalue := 'DEPTNO in (10,30)'; when 'MP' then l_returnvalue := 'DEPTNO in (20,40)'; else l_returnvalue := '1=1'; end case; return l_returnvalue; end; 49
50 Virtual private database begin dbms_rls.add_policy(object_schema => 'DEMO',object_name => 'EMP_VPD',policy_name => 'VPDDEMO',function_schema => 'DEMO',policy_function => 'VPDFUNC'); end; 50
51 Virtual private database begin dbms_rls.add_policy(object_schema => 'DEMO',object_name => 'EMP_VPD',policy_name => 'VPDDEMO',function_schema => 'DEMO',policy_function => 'VPDFUNC'); end; EMPNO ENAME DEPTNO ALLEN MILLER 10 9 rows selected select empno, ename, deptno from demo.emp_vpd EMPNO ENAME DEPTNO SMITH FORD 20 5 rows selected VirtualPrivateDatabase.sql 51
52 Data Masking nd Subsetting
53 Performance increase
54 Query result cache create table QueryResultCacheTable ( id number ) 54
55 Query result cache insert into QueryResultCacheTable(id) values (1); insert into QueryResultCacheTable(id) values (2); insert into QueryResultCacheTable(id) values (3); insert into QueryResultCacheTable(id) values (4); insert into QueryResultCacheTable(id) values (5); create or replace function veryslowfunction(id_in in queryresultcachetable.id%type) return queryresultcachetable.id%type as begin dbms_lock.sleep(1); return id_in; end; set timing on 55
56 Query result cache select VerySlowFunction(qrct.id) from QueryResultCacheTable qrct select /*+ result_cache */ veryslowfunction(qrct.id) from queryresultcachetable qrct select /*+ result_cache */ veryslowfunction(qrct.id) from queryresultcachetable qrct Executed in 5.88 seconds Executed in seconds Executed in seconds 56
57 Query result cache create or replace function veryslowfunction(id_in in queryresultcachetable.id%type) return queryresultcachetable.id%type deterministic as begin dbms_lock.sleep(1); return id_in; end; 57
58 Query result cache select /*+ result_cache */ veryslowfunction(qrct.id) from queryresultcachetable qrct select /*+ result_cache */ veryslowfunction(qrct.id) from queryresultcachetable qrct Executed in seconds Executed in seconds QueryResultCache.sql 58
59 Query result cache create table FunctionResultCacheTable ( id number ) 59
60 Query result cache insert into FunctionResultCacheTable(id) values (1); insert into FunctionResultCacheTable(id) values (2); insert into FunctionResultCacheTable(id) values (3); insert into FunctionResultCacheTable(id) values (1); insert into FunctionResultCacheTable(id) values (2); insert into FunctionResultCacheTable(id) values (3); insert into FunctionResultCacheTable(id) values (1); insert into FunctionResultCacheTable(id) values (2); insert into FunctionResultCacheTable(id) values (3); insert into FunctionResultCacheTable(id) values (1); 60
61 Query result cache create or replace function veryslowfunction(id_in in FunctionResultCacheTable.id%type) return FunctionResultCacheTable.id%type begin dbms_lock.sleep(1); return id_in; end; select veryslowfunction(frct.id) from FunctionResultCacheTable frct as Elapsed: 00:00:10.28 Elapsed: 00:00:
62 Query result cache create or replace function veryslowfunction(id_in in FunctionResultCacheTable.id%type) return FunctionResultCacheTable.id%type deterministic as begin dbms_lock.sleep(1); return id_in; end; select veryslowfunction(frct.id) from FunctionResultCacheTable frct Elapsed: 00:00:10.28 Elapsed: 00:00:04.09 Elapsed: 00:00:10.18 Elapsed: 00:00:
63 Query result cache create or replace function veryslowfunction(id_in in FunctionResultCacheTable.id%type) return FunctionResultCacheTable.id%type result_cache as begin dbms_lock.sleep(1); return id_in; end; select veryslowfunction(frct.id) from FunctionResultCacheTable frct Elapsed: 00:00:10.28 Elapsed: 00:00:04.09 Elapsed: 00:00:03.15 Elapsed: 00:00:00.00 Elapsed: 00:00:10.18 Elapsed: 00:00:04.16 Elapsed: 00:00:00.00 FunctionResultCache.sql 63
64
65 Application Upgrade 65
66 Application Upgrade 66
67 Application Upgrade ~~ 67
68 Application Upgrade 68
69 Application Upgrade 69
70 Application Upgrade Prevent new sessions starting Wait for current sessions to end or terminate current sessions Perform the upgrade or bugfixes Resume normaloperation 70
71
72 (Non)Editionable Objects Editionable Packages Procedures Functions Triggers Views Types Synonyms Non-Editionable Tables Materialized views DB Links 72
73 Special SQL features
74 Special SQL features Retrieve the top-3 earning employees select e.empno,e.ename,e.sal from demo.emp e where rownum < 4 order by e.sal desc EMPNO ENAME SAL ALLEN WARD SMITH
75 Special SQL features Retrieve the top-3 earning employees select e.empno,e.ename,e.sal from (select e2.empno,e2.ename,e2.sal from demo.emp e2 order by e2.sal desc) e where rownum < 4 EMPNO ENAME SAL KING SCOTT FORD
76 Special SQL features Retrieve the top-3 earning employees with orderedbysal as (select e.empno,e.ename,e.sal from demo.emp e order by e.sal desc) select obs.empno,obs.ename,obs.sal from orderedbysal obs where rownum < 4 Syntax Candy this is rewritten as select e.empno,e.ename,e.sal from demo.emp e order by e.sal desc fetch first 3 rows only EMPNO ENAME SAL KING SCOTT FORD EMPNO ENAME SAL KING SCOTT FORD
77 Special SQL features Retrieve the next 3 topearning employees with orderedbysal as (select e.empno,e.ename,e.sal,rownum rn from demo.emp e order by e.sal desc) select obs.empno,obs.ename,obs.sal from orderedbysal obs where obs.rn between 4 and 6 order by obs.rn EMPNO ENAME SAL JONES MARTIN BLAKE
78 Special SQL features Retrieve the next 3 topearning employees with orderedbysal as (select e.empno,e.ename,e.sal from demo.emp e order by e.sal desc), orderedwithrownum as (select obs.empno, obs.ename, obs.sal, rownum rn from orderedbysal obs) select obr.empno,obr.ename,obr.sal from orderedwithrownum obr where obr.rn between 4 and 6 order by obr.rn select e.empno,e.ename,e.sal from demo.emp e order by e.sal desc offset 3 rows fetch next 3 rows only EMPNO ENAME SAL JONES BLAKE CLARK EMPNO ENAME SAL JONES BLAKE CLARK paginating.sql 78
79 Special SQL features Build PL/SQL in SQL create or replace function wavey(string_in in varchar2) return varchar2 is l_returnvalue varchar2(30); begin for indx in 1.. length(string_in) loop l_returnvalue := l_returnvalue case mod(indx, 2) when 0 then upper(substr(string_in, indx, 1)) else lower(substr(string_in, indx, 1)) end; end loop; return l_returnvalue; end; Function created 79
80 80 Special SQL features Build PL/SQL in SQL select e.empno, e.ename, wavey(e.ename) wavey_ename, e.sal from demo.emp e EMPNO ENAME WAVEY_ENAME SAL SMITH smith ALLEN allen WARD ward JONES jones MARTIN martin BLAKE blake CLARK clark SCOTT scott KING king TURNER turner ADAMS adams JAMES james FORD ford MILLER miller rows selected
81 81 Special SQL features with function wavey(string_in in varchar2) return varchar2 is l_returnvalue varchar2(30); begin for indx in 1.. length(string_in) loop l_returnvalue := l_returnvalue case mod(indx, 2) when 1 then upper(substr(string_in, indx, 1)) else lower(substr(string_in, indx, 1)) end; end loop; return l_returnvalue; end; select e.empno, e.ename, wavey(e.ename) wavey_ename, e.sal from demo.emp e EMPNO ENAME WAVEY_ENAME SAL SMITH SmItH ALLEN AlLeN MILLER MiLlEr rows selected plsql_in_with.sql
82
83 Virtual Columns
84 Virtual Columns create table demo.emp_income ( empno number(4) not null, ename varchar2(10), sal number(7,2), comm number(7,2), deptno number(2), income number(7,2) generated always as (demo.emp_income.sal + coalesce(demo.emp_income.comm,0)) virtual ) 84
85 Virtual Columns insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7499, 'ALLEN', 1600, 30, 300); insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7521, 'WARD', 1250, 30, 500); insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7654, 'MARTIN', 1250, 30, 1400); insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7698, 'BLAKE', 2850, 30, null); insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7844, 'TURNER', 1500, 30, 0); insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7900, 'JAMES', 950, 30, null); 85
86 Virtual Columns insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7499, 'ALLEN', 1600, 30, 300); insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7521, 'WARD', 1250, 30, 500); insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7654, 'MARTIN', 1250, 30, 1400); insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7698, 'BLAKE', 2850, 30, null); insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7844, 'TURNER', 1500, 30, 0); insert into demo.emp_income(empno, ename, sal, deptno, comm) values (7900, 'JAMES', 950, 30, null); 86
87 Virtual Columns select * from demo.emp_income e EMPNO ENAME SAL COMM DEPTNO INCOME ALLEN WARD MARTIN BLAKE TURNER JAMES rows selected. VirtualColumnIncome.sql 87
88 Virtual Columns create table demo.emp_nuke ( empno number(4) not null, ename varchar2(10), sal number(7,2), deptno number(2), blowitup number generated always as (1/0) virtual ) 88
89 Virtual Columns insert into demo.emp_nuke(empno, ename, sal, deptno) values (7499, 'ALLEN', 1600, 30); insert into demo.emp_nuke(empno, ename, sal, deptno) values (7521, 'WARD', 1250, 30); insert into demo.emp_nuke(empno, ename, sal, deptno) values (7654, 'MARTIN', 1250, 30); insert into demo.emp_nuke(empno, ename, sal, deptno) values (7698, 'BLAKE', 2850, 30); insert into demo.emp_nuke(empno, ename, sal, deptno) values (7844, 'TURNER', 1500, 30); insert into demo.emp_nuke(empno, ename, sal, deptno) values (7900, 'JAMES', 950, 30); 89
90 Virtual Columns select * from demo.emp_nuke e select * * ERROR at line 1: ORA-01476: divisor is equal to zero 90
91 Virtual Columns select e.empno, e.ename, e.sal, e.deptno from demo.emp_nuke e EMPNO ENAME SAL DEPTNO ALLEN WARD MARTIN BLAKE TURNER JAMES rows selected. VirtualColumnPreventSelectStar.sql
92 Identity columns (12c)
93 Identity columns (12c) create table tablewithuniquecolumn ( theuniquecolumn number(10) not null, foo varchar2(30), bar varchar2(30) ) 93
94 Identity columns (12c) create sequence sequenceforuniquecolumn start with 1 nocache 94
95 Identity columns (12c) create or replace trigger makesureitsfilled before insert or update on tablewithuniquecolumn for each row begin if :new.theuniquecolumn is null then select sequenceforuniquecolumn.nextval into :new.theuniquecolumn from dual; end if; end; 95
96 Identity columns (12c) create or replace trigger makesureitsfilled before insert or update on tablewithuniquecolumn for each row begin if :new.theuniquecolumn is null then :new.theuniquecolumn := sequenceforuniquecolumn.nextval; end if; end; 96
97 Identity columns (12c) create table tablewithidentitycolumn ( theidentitycolumn number(10) generated always as identity, foo varchar2(30), bar varchar2(30) ) identity_columns.sql 97
98 Identity columns (12c) 98
99 Invisible columns (12c)
100 Invisible columns (12c) create table Show ( I varchar2(30), am varchar2(30), the varchar2(30), invisible varchar2(30), man varchar2(30) ) 100
101 Invisible columns (12c) I AM THE INVISIBLE MAN I am the invisible man select * from show 101
102 Invisible columns (12c) I AM THE INVISIBLE MAN I am the invisible man select * from show alter table show modify invisible invisible 102
103 Invisible columns (12c) I AM THE MAN INVISIBLE MAN I am the man invisible man select * from show alter table show modify invisible invisible 103
104 Invisible columns (12c) I AM THE MAN INVISIBLE MAN I am the man invisible man select * from show alter table show modify invisible invisible select I, am, the, invisible, man from show IAmTheInvisibleColumn.sql 104
105 Whitelisting PL/SQL program units
106 Whitelisting PL/SQL program units 106
107 Whitelisting PL/SQL program units create or replace procedure onlywhitelisted accessible by (normalprocedure) is begin dbms_output.put_line('you are allowed'); end; 107
108 Whitelisting PL/SQL program units create or replace procedure onlywhitelisted accessible by (normalprocedure) is begin dbms_output.put_line('you are allowed'); end; create or replace procedure normalprocedure is begin dbms_output.put_line ('normalprocedure calls onlywhitelisted'); onlywhitelisted; end; 108
109 Whitelisting PL/SQL program units create or replace procedure onlywhitelisted accessible by (normalprocedure) is begin dbms_output.put_line('you are allowed'); end; create or replace procedure normalprocedure is begin dbms_output.put_line ('normalprocedure calls onlywhitelisted'); onlywhitelisted; end; create or replace procedure evilprocedure is begin dbms_output.put_line ('evilprocedure calls onlywhitelisted'); onlywhitelisted; end; 109
110 Whitelisting PL/SQL program units create or replace procedure onlywhitelisted accessible by (normalprocedure) is begin dbms_output.put_line('you are allowed'); end; create or replace procedure normalprocedure is begin dbms_output.put_line ('normalprocedure calls onlywhitelisted'); onlywhitelisted; end; create or replace procedure evilprocedure is begin dbms_output.put_line ('evilprocedure calls onlywhitelisted'); normalprocedure'); onlywhitelisted; normalprocedure; end; whitelisting_12c.sql 110
111
112 Credits No Matter How Much Database Data integrity/quality f1344cb121f.jpeg 112
113 Credits Flashback queries Temporal validity Data security 898a5f90898b/32c0dc0f18610d2a9eddc85b19bdce81/hacker6.jpg 113
114 Credits Performance increase Down for maintenance Edition Based Redefinition 114
115 Credits Special SQL features Pros Cons Virtual Columns 115
116 Credits Identity columns (12c) Invisible columns (12c) Whitelisting PL/SQL program units 780x421.png 116
117 Credits Whitelisting PL/SQL program units 117
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