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If I have 5 Queries in a DB2 Cobol program , while
precompiling how many DBRMs will get created and How many
Plans and Packages will get created while Bind Process?
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Answer / lu
when u bind , 5 queries has 5 sql statements in 1 DBRM, its
regroup into 1 package, 1 plan...Plan is a collection of
packages..
correct me if i'm wrong..
| Is This Answer Correct ? | 23 Yes | 0 No |
Answer / satish k
One correction to the above. DBRM is DataBase Request
Module and not DataBase Replacement Module.
| Is This Answer Correct ? | 10 Yes | 0 No |
Answer / ankur bhalla
1 DBRM(DATABASE REQUEST MODULE), 1 PACKAGE AND 1 PLAN.
| Is This Answer Correct ? | 5 Yes | 0 No |
Answer / srinivas chennareddy
As the name indicates DBRM(Data Base Replacement Module) is
for one module...irrespective of the number of SQL's in a
module/program...one DBRM will be created and it will be
bound to one package,and collection of all calling/called
module packages forms an application PLAN,which will be
loaded into main memory and executed during run time.
| Is This Answer Correct ? | 4 Yes | 2 No |
SET is the ANSI standard for variable assignment, SELECT is not. SET can only assign one variable at a time, SELECT can make multiple assignments at once. If assigning from a query, SET can only assign a scalar value. If the query returns multiple values/rows then SET will raise an error. SELECT will assign one of the values to the variable and hide the fact that multiple values were returned (so you'd likely never know why something was going wrong elsewhere - have fun troubleshooting that one) When assigning from a query if there is no value returned then SET will assign NULL, where SELECT will not make the assignment at all (so the variable will not be changed from it's previous value) As far as speed differences - there are no direct differences between SET and SELECT. However SELECT's ability to make multiple assignments in one shot does give it a slight speed advantage over SET.
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