Logical Database

[Former Member]

Dear Gurus,

What is the transaction code for Logical Database ?

With Regards

Sachin Gandhi

[venkat_o]

Check SE36.

Regards,

Venkat.O

[Former Member]

Hi SE36 IS THE logical data base Tcode

Kinly rewad points if useful

hi,

logical database performs the following functions

1. data retrieval.

2. screening.

3.automatic authorisation checks.

The LDB is special type of ABAP program that combines the contents of certain related database tables and retrieve some related data and make it available to application programs.

In other words, a LDB is a method by which ABAP programs read and process the data. The sequence in which the data is supplied to the program is determined by a tree structure

LDBs provide Standard selection screens based on the LDB used.

LDBs also have inbuilt authorization checking.

here is a small program for PNP LDB .

tables: pernr.

infotypes: 0000,0001.

get pernr.

write: / pernr-pernr , p0000-massn , p0001-abkrs.

.here by using this program we can avoid writing many select queries. also data retrieval is very simple.

we use LDB only when we have to retrieve large amount of data.

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=...

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

www.sapbrain.com/FAQs/TECHNICAL/SAP_ABAP_Logical_Database_FAQ.html

www.sap-img.com/abap/abap-interview-question.htm

www.sap-img.com/abap/quick-note-on-design-of-secondary-database-indexes-and-logical-databases.htm

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

http://help.sap.com/saphelp_nw2004s/helpdata/en/9f/db9bb935c111d1829f0000e829fbfe/content.htm

Gothru the blog which provides info on LDB's:

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

Sample code

TABLES: SPFLI,

SFLIGHT,

SBOOK,

SCARR.

START-OF-SELECTION.

GET SPFLI.

WRITE:/ ’SPFLI: ’, SPFLI-CARRID, SPFLI-CONNID,

SPFLI-AIRPFROM, SPFLI-AIRPTO.

GET SFLIGHT.

WRITE:/ ’ SFLIGHT: ’, SFLIGHT-CARRID, SFLIGHT-CONNID, SFLIGHT-FLDATE.

GET SBOOK.

WRITE:/ ’ SBOOK: ’, SBOOK-CARRID, SBOOK-CONNID,

SBOOK-FLDATE, SBOOK-BOOKID.

GET SFLIGHT LATE.

WRITE:/ ’ GET SFLIGHT LATE: ’, SFLIGHT-FLDATE.

Regards

sas

Edited by: saslove sap on Apr 7, 2008 7:34 AM

Edited by: saslove sap on Apr 7, 2008 7:35 AM

[Former Member]

Thank You Sir.