The Advantages of PostgreSQL

Transcription

1 The Advantages of PostgreSQL BRUCE MOMJIAN POSTGRESQL offers companies many advantages that can help their businesses thrive. Creative Commons Attribution License Last updated: September, / 43

2 Introduction Why use databases? Why use open-source? PostgreSQL history PostgreSQL in the real world The Advantages of PostgreSQL 2 / 43

3 Why use databases? The Advantages of PostgreSQL 3 / 43

4 Non-SQL Database Applications Application Customer Order Part Customer Order Part Customer Order Part Customer Order Part The Advantages of PostgreSQL 4 / 43

5 SQL Database Applications Application SQL Server Customer Order Part Customer Order Part Customer Order Part Customer Order Part The Advantages of PostgreSQL 5 / 43

6 Database Transaction Protection (ACID) Multiple changes either all take place, or none of them Data always in a consistent state In-process changes invisible to outside users Data reliably stored High level of concurrency and reliability The Advantages of PostgreSQL 6 / 43

7 Why use Open Source Software? The Advantages of PostgreSQL 7 / 43

8 Closed-Source Software Black Box Func(...) Data VWOJVC The Advantages of PostgreSQL 8 / 43

9 Open-Source Software Clear Box Func(...) Data... VWOJVC The Advantages of PostgreSQL 9 / 43

10 Support of Close-Source Software Support Database Company The Advantages of PostgreSQL 10 / 43

11 Support of Open-Source Software Support Source Code Support EnterpriseDB Support Mailing Lists The Advantages of PostgreSQL 11 / 43

12 The Future of Open Source Open Source Features Performance Reliability Close Source Time The Advantages of PostgreSQL 12 / 43

13 PostgreSQL License Use for any purpose, including sale of customized versions with your closed-source modifications. PostgreSQL supports custom: Functions Operators Data Types The Advantages of PostgreSQL 13 / 43

14 PostgreSQL History The Advantages of PostgreSQL 14 / 43

15 The University of California at Berkeley The Advantages of PostgreSQL 15 / 43

16 Postgres Postgres95 Michael Stonebraker Jolly Chen and Andrew Yu The Advantages of PostgreSQL 16 / 43

17 PostgreSQL Code Base History Ingres research prototype, spawned Relational Technologies, purchased by Computer Associates Postgres research prototype, spawned Illustra, purchased by Informix Postgres95 added SQL, spawned PostgreSQL The Advantages of PostgreSQL 17 / 43

18 PostgreSQL Through the Years Ingres Postgres Postgres PostgreSQL The Advantages of PostgreSQL 18 / 43

19 Developer s Globe The Advantages of PostgreSQL 19 / 43

20 PostgreSQL Core Team Top row: Thomas Lockhart, Jan Wieck, Tom Lane, Marc Fournier Bottom row: Vadim Mikheev, Bruce Momjian The Advantages of PostgreSQL 20 / 43

21 Release Dates and Sizes Date Release Lines of code , , , , , , , , , ??-?? The Advantages of PostgreSQL 21 / 43

22 PostgreSQL Releases Release 1.02 Date: Initial release by PostgreSQL Global Development Team Apply all outstanding patches. The Advantages of PostgreSQL 22 / 43

23 PostgreSQL Releases (Continued) Release 1.09 Date: Fixes for server and command failures. The Advantages of PostgreSQL 23 / 43

24 PostgreSQL Releases (Continued) Release 6.0 Date: Unique indexes GIST added Improved authentication IN/BETWEEN added The Advantages of PostgreSQL 24 / 43

25 PostgreSQL Releases (Continued) Release 6.1 Date: New data types: DATETIME, TIMESPAN, CIRCLE GEQO Improved optimizer statistics Libpq++ overhauled Multi-column btree indexes new SET/SHOW/RESET commands New SEQUENCE feature The Advantages of PostgreSQL 25 / 43

26 PostgreSQL Releases (Continued) Release 6.2 Date: New Java JDBC driver Triggers added Server Programming Interface (SPI) added NOT NULL constraint DEFAULT and CONSTRAINT added ANSI functions added for DATE/TIME and PRECISION The Advantages of PostgreSQL 26 / 43

27 Release 6.3 Date: Subselcts PostgreSQL Releases (Continued) Unix domain socket support for performance Improved user password configuration Much improved documentation Separate permissions for VIEWs PRIMARY KEY support PL/TCL procedural language added UNION added Python added ECPG added New ODBC driver Pgaccess added The Advantages of PostgreSQL 27 / 43

28 PostgreSQL Releases (Continued) Release 6.4 Date: Improved RULEs and VIEWs PL/PgSQL added Multi-byte character support Internet address data types HAVING added The Advantages of PostgreSQL 28 / 43

29 PostgreSQL Releases (Continued) Release 6.5 Date: MVCC Live backups NUMERIC data type Temporary tables CASE INTERSECT EXCEPT LIMIT/OFFSET SELECT FOR UPDATE Optimizer overhaul The Advantages of PostgreSQL 29 / 43

30 PostgreSQL Releases (Continued) Release 7.0 Date: Foreign keys More optimizer improvements ANSI JOIN syntax PL/Perl Oracle compatibility functions The Advantages of PostgreSQL 30 / 43

31 PostgreSQL Releases (Continued) Release 7.1 Date: Write-ahead Log (WAL) TOAST Outer Joins Overhauled function manager The Advantages of PostgreSQL 31 / 43

32 PostgreSQL Releases (Continued) Release 7.2 Date: ?? Non-locking VACUUM Fix for Transaction id / OID wraparound Security fixes Optimizer improvements Error message internationalization The Advantages of PostgreSQL 32 / 43

33 Internals Flowchart Main Postmaster Libpq Postgres Postgres Parse Statement utility Traffic Cop Query SELECT, INSERT, UPDATE, DELETE Rewrite Query Utility Command e.g. CREATE TABLE, COPY Generate Paths Optimal Path Generate Plan Plan Execute Plan Utilities Catalog Storage Managers Access Methods Nodes / Lists The Advantages of PostgreSQL 33 / 43

34 Performance - AS3AP The Advantages of PostgreSQL 34 / 43

35 Performance - TPC-C The Advantages of PostgreSQL 35 / 43

36 PostgreSQL in the Real World The Advantages of PostgreSQL 36 / 43

37 Database Migration Oracle IBM s DB2 Microsoft-SQL Microsoft Access Informix Interbase Dbase/FoxPro MySQL The Advantages of PostgreSQL 37 / 43

38 Database Languages C C++ Embedded C Java Perl Python Tcl/Tk Php Odbc The Advantages of PostgreSQL 38 / 43

39 PostgreSQL Platforms AIX BeOS BSD/OS FreeBSD HP-UX IRIX Linux MacOS NetBSD OpenBSD SCO UnixWare Solaris SunOS Tru64 Windows NT/2000 The Advantages of PostgreSQL 39 / 43

40 PostgreSQL Usage Order Entry, Inventory, Billing Customer Relations Management (CRM) Data warehouse, data analysis Medical/Hospital Records Storage Genetics Financial Accounting, Banking, Payroll Military Government, Social services, Elections Education Publishing Geography (GIS) Hotel Reservations, Restaurants Telephone billing, call tracking Helpdesk problem report tracking Sales Tracking Business to business commerce The Advantages of PostgreSQL 40 / 43

41 PostgreSQL Web Site Usage Product purchase User preferences Job listings Auctions Real Estate listings Community building Dynamic content Text indexing The Advantages of PostgreSQL 41 / 43

42 Future Directions The Advantages of PostgreSQL 42 / 43

43 Conclusion The Advantages of PostgreSQL 43 / 43