Explore query federation capabilities in IBM Big SQL, which enables programmers to transparently join Hadoop data with relational database management (RDBMS) data.

1. © 2016 IBM Corporation
Introducing Big SQL Federation
Createdby C. M. Saracco,IBM Silicon Valley Lab
June 2016

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Executive summary
§ What’s Big SQL federation?
− Integration technology for Hadoop and remote data sources
− Transparently query Big SQL (Hadoop) and RDBMS tables with standard SQL
− Query optimization, security mapping, other critical features built in
§ Why federate?
− Not always practical to move / replicate data from one source to another
− Hadoop programmers need access to corporate RDBMS data to enhance analytics,
integrate public and proprietary data, etc.
§ What’s supported?
− Big SQL tables (and views) in DFS, HBase, or Hive warehouse
− RDBMS tables (and views) in Oracle, Teradata, MS SQL Server, DB2, Informix,
Netezza, . . .
− Query data across all sources (project, restrict, join, union, wide range of sub-queries,
wide range of built-in functions )
− INSERT INTO … SELECT FROM …
− Issue data-source specific SQL
− Collect statistics and inspect detailed data access plan
− . . . .

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Agenda
§Overview
− Key features
− When to federate
§Technology
− Architecture
− Set up, usage examples
− Supported data sources
§Summary

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Big SQL query federation = virtualized data access
Transparent
§ Appears to be one source
§ Programmers don’t need to know how /
where data is stored
Heterogeneous
§ Accesses data from diverse sources
High Function
§ Full query support against all data
§ Capabilities of sources as well
Autonomous
§ Non-disruptive to data sources, existing
applications, systems.
High Performance
§ Optimization of distributed queries
SQL tools,
applications Data sources
Virtualized
data

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When to federate….
§ Budget
§ Resources
§ Time
§ Ownership
§ Too ad hoc, temporary
§ Too proprietary
§ Too recent
§ Too big
Physical integration not always a requirement/option
Barriers

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Agenda
§Overview
− Key features
− When to federate
§Technology
− Architecture
− Set up, usage examples
− Supported data sources
§Summary

7. © 2016 IBM Corporation7
Federation architecture and components
Wrapper
ServerServer
Nickname
Nickname
Nickname
Federated server:
BigSQL database enabled
for federation.
Wrapper: library allowing
access to a particular
class of data sources or
protocols (Net8, DRDA,
etc). Contains
information about data
source characteristics
Server: represents a
specific data source
Nickname: a local alias
to data on a remote
server (e.g, a specific
table or view)
Federation catalog
4Stores information about
4Wrappers,servers,
nicknames
4Server attributes
4Nickname attributes
4Remote functions
Federation server (Big SQL)

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Federation in practice
§ Admin enables
federation
§ Apps connect to Big
SQL database
§ Nicknames look like
tables to the app
§ Big SQL optimizer
creates global data
access plan with cost
analysis, query push
down
§ Query fragments
executed remotely
Nickname
Nickname
Table
Cost-based optimizer
Wrapper
Client library
Wrapper
Client library
Local + Remote
Execution Plans
Remote sources
Federation server (Big SQL)
Native dialect
Connect to bigsql

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Creating and using federated objects (example)
-- Create wrapper to identify client library (Oracle Net8)
CREATE WRAPPER ORA LIBRARY 'libdb2net8.so'
-- Create server for Oracle data source
CREATE SERVER ORASERV TYPE ORACLE VERSION 11 WRAPPER ORA
AUTHORIZATION
”orauser” PASSWORD ”orauser” OPTIONS (NODE 'TNSNODENAME', PUSHDOWN 'Y',
COLLATING_SEQUENCE 'N');
-- Map the local user 'orauser' to the Oracle user 'orauser' / password 'orauser'
CREATE USER MAPPING FOR orauser SERVER ORASERV OPTIONS (
REMOTE_PASSWORD
'orauser');
-- Create nickname for Oracle table / view
CREATE NICKNAME NICK1 FOR ORASERV.ORAUSER.TABLE1;
-- Query the nickname
SELECT * FROM NICK1 WHERE COL1 < 10;

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Joining data across sources

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Data sources supported by Big SQL Federation Server
§ Current list of supported data sources available at
https://www-304.ibm.com/support/entdocview.wss?uid=swg27044495
Data Source Supported Versions Notes
DB2® DB2 for Linux, UNIX, and
Windows 9.7, 9.8, 10.1, 10.5
DB2 for z/OS 8.x, 9.x, and 10.x
Oracle 11g, 11gR1, 11g R2, 12c
Teradata 12, 13, 14 Not supported on POWER systems.
Netezza 4.6, 5.0, 6.0, 7.2 Not supported on POWER systems.
Informix 11.5
Microsoft SQL Server 2012, 2014

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Agenda
§Overview
− Key features
− When to federate
§Technology
− Architecture
− Set up, usage examples
− Supported data sources
§Summary

13. © 2016 IBM Corporation13
Big SQL federation
– Easily access information on demand
– Combine Big Data in Hadoop with RDBMS data
– Quickly extend your data warehouse
Benefits
– Cost-effective
– Quick to provide fast time to value
– Agile and flexible
– Versatile
– Low risk, seamless, and transparent