IT-SDC : Support for Distributed Computing

PostgreSQL plugin for SSB

Robert VežnaverIT/SDC

25th April 2014

2IT-SDC

architecture

25th April 2014PostgreSQL plugin for SSB

siteview

Oracle Context

cx_Oracle

3IT-SDC

ideal solution

25th April 2014PostgreSQL plugin for SSB

siteview

PostgreSQL Context

psycopg2

4IT-SDC

Oracle SQL

25th April 2014PostgreSQL plugin for SSB

psycopg2

Oracle SQL

translator

DECODENVLROWNUMSET TIME_ZONESYS_EXTRACT_*SYSDATE

variable binding:var %(var)s

“false friends”

5IT-SDC

PL/SQL procedures

25th April 2014PostgreSQL plugin for SSB

psycopg2

Oracle SQL PL/SQL

PL/pgSQLtranslator

callproc()

6IT-SDC

Bypassing context

25th April 2014PostgreSQL plugin for SSB

psycopg2

Oracle SQL PL/SQL

PL/pgSQLtranslator

cursor()callproc()

7IT-SDC

Code consistency

25th April 2014PostgreSQL plugin for SSB

psycopg2

Oracle SQL PL/SQL

PL/pgSQLtranslator

cursor()callproc()

http/siteview

Monitoring of Grid Operations - S. Roiser 8IT-SDC

Case sensitivity

Oracle returns UPPERCASE,PgSQL returns lowercase

Most columns in Oracle are CamelCase, but not all!

Reserved SQL words used as names! Other modules get key/value list

directly, therefore JavaScript code depends on case!

21 May 2013

Monitoring of Grid Operations - S. Roiser 9IT-SDC

Proposed solution

21 May 2013

Create style guidelines document Rewrite SQL to ANSI Remove PL/SQL procedures Case sensitivity

use PostgreSQL with “CamelCase”, modify cursor for uppercase

make everything go through context mapper