Logical data base

Former Member — Mon, 07 Jan 2008 11:41:39 GMT

hi experts!!

i am working on the LDb report and i have created a LDB zaxxx in se36 and using the same LDB to code in se38 and in attributes i have mentioned the name of LDB.

when i code follwoing:

GET ZAXXXX FIELDS INVOICE_NUM CUST_NAME CUST_PO_NUM INV_DATE.

ITS GIVING ERROR THAT ZAXXX IS NOT SPECIFIED FOR FIELD SELECTION.

when i use only

GET ZAXXXX . when i debug valuse are comming but when process the report its giving no valuse.

plz suggest me on the same..

mahesh

Re: Logical data base

Former Member — Mon, 07 Jan 2008 11:59:47 GMT

Hi,

You need to maintain selection screen in the LDB design.

Than i will work.

Regards,

Suresh.

Re: Logical data base

Former Member — Mon, 07 Jan 2008 12:08:49 GMT

hii

i ahve done that to .

i have maintened the slection screen in ldb

but too this error is comming'

Re: Logical data base

Former Member — Mon, 07 Jan 2008 14:45:59 GMT

hi this may be of some help.

A logical database is a special ABAP/4 program which combines the contents of certain database tables. You can link a logical database to an ABAP/4 report program as an attribute. The logical database then supplies the report program with a set of hierarchically structured table lines which can be taken from different database tables.

LDB offers an easy-to-use selection screens. You can modify the pre-generated selection screen to your needs. It offers check functions to check whether user input is complete, correct, and plausible. It offers reasonable data selections. It contains central authorization checks for data base accesses. Enhancements such as improved performance immediately apply to all report programs that use the logical database.

Less coding s required to retrieve data compared to normal internel tables.

Tables used LDB are in hierarchial structure.

Mainly we used LDBs in HR Abap Programming.

Where all tables are highly inter related so LDBs can optimize the performance there.

Check this Document. All abt LDB's

https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.highlightedcontent?documenturi=%2flibrary%2fabap%2fabap-code-samples%2fldb+browser.doc

GO THROUGH LINKS -

http://www.sap-basis-abap.com/saptab.htm

http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9bfa35c111d1829f0000e829fbfe/content.htm

http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9b5e35c111d1829f0000e829fbfe/frameset.htm

http://help.sap.com/saphelp_nw04/helpdata/en/c6/8a15381b80436ce10000009b38f8cf/frameset.htm

/people/srivijaya.gutala/blog/2007/03/05/why-not-logical-databases