IEEE Day 2013

Ramin OrujovICT/Internal Applications Team HeadAzercell TelecomSCJP 6, OCE Java EE 6 WCD

www.linkedin.com/in/raminorujov

01 October 2013, Qafqaz University

Oracle database 12c: New features for developers

About me

Senior software developer

Internal Applications Team Head@Azercell

Teacher @ Qafqaz University CE dept.

Co-manager of AZEROUG

Founder and manager of AZERJUG

April 9, 20232

Oracle database platforms

Oracle 9i – internetOracle 10g/11g – gridOracle 12c - cloud

http://www.oracle.com/us/products/database/overview/index.htmlhttp://www.oracle.com/technetwork/database/plug-into-cloud-wp-12c-1896100.pdf

April 9, 20233

SQL new features

SEQUENCE as default column value IDENTITY column VARCHAR2, NVARCHAR2 32K limit LIMIT, OFFSET support for paging Invisible column support Inline PL/SQL function within SQL WITH

expression

April 9, 20234

SEQUENCE as default col value

create sequence test_seq start with 1increment by 1;create table test_table(

id number default test_seq.nextval primary key);http://docs.oracle.com/cd/E16655_01/server.121/e17209/statements_7002.htm#SQLRF54458

April 9, 20235

IDENTITY column

MySQL,MS SQL Server auto increment/identitycreate table test_table(

id number generated by default on null as identity, name varchar2(10))insert into test_table(name) values(‘ramin’)insert into test_table(id,name) values(null, ‘ramin’)

http://docs.oracle.com/cd/E16655_01/gateways.121/e22508/migr_tools_feat.htm#DRDAA109

April 9, 20236

VARCHAR2,NVARCHAR2 32K limit

32767 character supportVARCHAR2, NVARCHAR2, RAW

Initialization paramMAX_STRING_SIZE = EXTENDED

http://docs.oracle.com/cd/E16655_01/server.121/e17209/sql_elements001.htm#SQLRF55623

April 9, 20237

LIMIT, OFFSET support

select *from (

select rownum rn, id, e.* from employees e )where rn between 1 AND 10order by 1;

April 9, 20238

LIMIT, OFFSET support

April 9, 20239

LIMIT, OFFSET support

April 9, 202310

SELECT employee_id, last_nameFROM employeesORDER BY salaryFETCH FIRST 10 ROWS ONLY;

SELECT employee_id, last_nameFROM employeesORDER BY salaryOFFSET 5 ROWS FETCH NEXT 10 ROWS ONLY;

LIMIT, OFFSET support

April 9, 202311

SELECT employee_id, last_name, salaryFROM employeesORDER BY salaryFETCH FIRST 5 PERCENT ROWS WITH TIES;

http://docs.oracle.com/cd/E16655_01/server.121/e17209/statements_10002.htm#SQLRF55636

Invisible column

April 9, 202312

create table app_user(id number generated by default on

null as identity,username varchar2(100) not null,passwd varchar(100) invisible);select * from app_user;

http://docs.oracle.com/cd/E16655_01/server.121/e17636/tables.htm#ADMIN13866

Inline PL/SQL function WITH

April 9, 202313

withfunction sqr(p_num in number)

return number is begin return p_num * p_num; end;select u.user_id, sqr(u.user_id) from all_userswhere rownum <= 10;2.5-3x performance improvementhttp://docs.oracle.com/cd/E16655_01/server.121/e17209/statements_10002.htm#SQLRF55665

PL/SQL new features

April 9, 202314

New way for returning cursor Modularity with ACCESSIBLE BY New UTL_CALL_STACK package Using PL/SQL types in SQL context Result cache support for functions with

invoker’s right

New way for returning cursor

April 9, 202315

create procedure get_customer_order_listas

cur_customer sys_refcursor;cur_order sys_refcursor;

begin open cur_customer for select * from customer;

open cur_order for select * from order;

dbms_sql.return_result(cur_customer); dbms_sql.return_result(cur_order);end;

New way for returning cursor

April 9, 202316

// sample JDBC codeString sql = “begin get_customer_order_list; end;”;Connection con = datasource.getConnection();PreparedStatement ps = con.prepareStatement();ps.executeQuery(sql);while(ps.getMoreResults()) {

ResultSet rs = ps.getResultSet(); while(rs.next()) {

… read columns}

}

Modularity with ACCESSIBLE BY

April 9, 202317

package pkg_api;package pkg_api_utility;

pkg_api_utility is considered to be used only by pkg_api

ACCESSİBLE BY

Modularity with ACCESSIBLE BY

April 9, 202318

CREATE OR REPLACE PACKAGE pkg_api_utilityACCESSIBLE BY (pkg_api)IS PROCEDURE h1; PROCEDURE h2;END pkg_api_utility;

CREATE OR REPLACE PACKAGE BODY pkg_api_utilityIS PROCEDURE h1 IS BEGIN DBMS_OUTPUT.PUT_LINE('Helper procedure h1'); END; PROCEDURE h2 IS BEGIN DBMS_OUTPUT.PUT_LINE('Helper procedure h2'); END;END pkg_api_utility;

Modularity with ACCESSIBLE BY

April 9, 202319

beginpkg_api.p1;pkg_api.p2;

end;begin

pkg_api_utility.h1;pkg_api_utility.h2;

end;

ORA-06550PLS-00904: insufficient privilege to access object PKG_API_UTILITY

UTL_CALLSTACK package

April 9, 202320

DBMS_UTILITY functions related to call/error stack:–FORMAT_CALL_STACK–FORMAT_ERROR_STACK–FORMAT_ERROR_BACKTRACE

New package: UTL_CALLSTACK

http://docs.oracle.com/cd/E16655_01/appdev.121/e17602/u_call_stack.htm#ARPLS74078

Result cache support for functions with invoker’s right

April 9, 202321

In Oracle Database 11g Release 2 (11.2), only definer's rights PL/SQL functions could be result cached. Now, invoker's rights PL/SQL functions can also be result cached. (The identity of the invoking user is implicitly added to the key of the result.)http://docs.oracle.com/cd/E16655_01/appdev.121/e17622/release_changes.htm#LNPLS110

Java new features

April 9, 202322

PL/SQL boolean support in JDBC driver PL/SQL package level collection

support

Package level collection support

April 9, 202323

create or replace package TEST_PKG is type V_TYP is varray(10) of varchar2(200); type R_TYP is record(c1 pls_integer, c2 varchar2(100)); procedure VARR_PROC(p1 in V_TYP, p2 OUT V_TYP); procedure REC_PROC(p1 in R_TYP, p2 OUT R_TYP);end;/

Package level collection support

April 9, 202324

create or replace package body TEST_PKG is procedure VARR_PROC(p1 in V_TYP,

p2 OUT V_TYP) is begin p2 := p1; end; procedure REC_PROC(p1 in R_TYP,

p2 OUT R_TYP) is begin p2 := p1; end;end;

JDBC code

April 9, 202325

CallableStatement cstmt = null; try { cstmt = conn.prepareCall("{ call TEST_PKG.VARR_PROC(?,?) }");Array arr = ((OracleConnection)conn).createArray("TEST_PKG.V_TYP", new String[]{"A", "B"}); cstmt.setArray(1, arr); cstmt.registerOutParameter(2, Types.ARRAY, "TEST_PKG.V_TYP"); cstmt.execute(); //get PLSQL VARRAY type out parameter value Array outArr = cstmt.getArray(2);} catch( Exception e) { e.printStackTrace();}

JDBC code

April 9, 202326

try { cstmt = conn.prepareCall("{ call TEST_PKG.REC_PROC(?,?) }"); //PLSQL RECORD type binding Struct struct = conn.createStruct("TEST_PKG.R_TYP", new Object[]{12345, "B"}); cstmt.setObject(1, struct); cstmt.registerOutParameter(2, Types.STRUCT, "TEST_PKG.R_TYP"); cstmt.execute(); //get PLSQL RECORD type out parameter value Struct outStruct = (Struct)cstmt.getObject(2);} catch( Exception e) { e.printStackTrace();}

JDBC code

April 9, 202327

CREATE OR REPLACE PACKAGE PACK1 AS TYPE EMPLOYEE_ROWTYPE_ARRAY IS TABLE OF EMPLOYEES%ROWTYPE;END PACK1;

CallableStatement cstmt = conn.prepareCall("BEGIN SELECT * BULK COLLECT INTO :1 FROM EMPLOYEE; END;");cstmt.registerOutParameter(1,OracleTypes.ARRAY, "PACK1.EMPLOYEE_ROWTYPE_ARRAY");cstmt.execute();Array a = cstmt.getArray(1);

References

April 9, 202328

http://docs.oracle.com/cd/E16655_01/appdev.121/e17622/release_changes.htm

http://www.toadworld.com/platforms/oracle/b/weblog/archive/2013/07/01/oracle-database-12c-new-pl-sql-features.aspx

http://docs.oracle.com/cd/E16655_01/java.121/e17657/apxref.htm#CHEIIJCC

http://www.oracle-base.com/articles/12c/with-clause-enhancements-12cr1.php

Q&A

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