IBM MAINFRAME HELP & SUPPORT FORUMS

chandrasekhar · Joined: 29 Sep 2004 Posts: 35 Location: bangalore

CAN ANY BODY TELL ME WHAT IS DB2 BIND WHAT DOES IT ACTUALLY DO?

DON'T MIND ALTOUGH IT IS A VERY BASIC QUESTION BUT UR ANSWER COULD CLEAR MY FUNDA

THANKS

priya · Joined: 24 Jul 2003 Posts: 624 Location: Bangalore

DB2 Bind compiles all your sql statements(dbrm) into an executable format. It uses DB2 Optimizer to create the better access path.

anuradha · Joined: 06 Jan 2004 Posts: 257

Hi Chandrasekhar,

Check out this link:

http://www.db2mag.com/story/showArticle.jhtml?articleID=15300107

This explains you very clearly about,precompilation,Bind,packages,plan etc etc details.

Thanks,
Anu

chandrasekhar · Joined: 29 Sep 2004 Posts: 35 Location: bangalore

THANKS TO PRIYA AND ANURADHA WHO HELP ME TO UNDERSTAND THE DB2 CONCEPT.SPECIALLY THE LINK U GIVE IS REALLY A WONDERFUL ONE.
IF THERE ANY FURTHER DOUBT THEN I LL CONTACT U.
THANKS

chandrasekhar · Joined: 29 Sep 2004 Posts: 35 Location: bangalore

WHAT IS PLAN AND PACKAGE
WHAT ARE THE DIFERENCE???

anuradha · Joined: 06 Jan 2004 Posts: 257

Hi Chandrasekhar,

I suppose all this were clearly explained in that link:

Anyway:

Package is the executable access path code for the sql statements in the DBRM

Plan contains package list which is nothing but pointers to packages.

Here i give you some more information which clearly says you the use of plan,package.

We can BIND the instructions for the SQL that was in the DBRM into a PLAN (the old way), or We can BIND the instructions into a PACKAGE (this also become old now).But binding the instructions into a plan works fine as long as the program will be standalone pgm.It has many drawbacks.After that we started binding instructions into a package

If only one DBRM could be bound into a PACKAGE, and if PGMA need to CALL PGMB and PGMB need to CALL PGMC etc etc., then a structure was needed to gather all of the PACKAGEs into a searchable list. This structure became a packagelist, rather than a memberlist, bound into a PLAN.

To solve a few more problems, IBM introduced the concept of COLLECTIONs. A collection is simply a way of grouping packages into meaningful groups. you could use COLLECTIONs to separate programs for different application areas, such as payroll and inventory.

Hence program bound into the COLLECTION will be accessible by the named PLAN.

Hope this is clear,

Thanks,
Anu

Sabry Krishnan L · Joined: 30 Dec 2006 Posts: 11 Location: Chennai-India

Thank Anu... The info in the link is very useful!

md.khajapasha · Joined: 28 Jun 2008 Posts: 3 Location: Hyderabad

hi,
bind it takes dbrm as input and gnerates optimized access path(best access path feed into plan).

enrico-sorichetti · Joined: 14 Mar 2007 Posts: 3168 Location: italy

it is very nice for a newcomer to try to help...
but why resurrect for the second time a thread started four years ago