SAP LSMW is a tool provided by SAP for migration of data. Basically with the help of this tool data can be transferred to SAP once or periodically. LSMW can be used by Technical as well as Functional consultants. SAP has specifically designed this tool to make data transfer process easy and convenient and also to help Functional Consultants to transfer the data without getting into much technicalities. LSMW has built in functionality that takes the load off the programmer in transferring the data periodically or for doing a one time Data Migration. For example it does a check of Data to be migrated against the settings in the customization, this is carried out after the data migration but before updating the database. The LSMW tool has functionality for mapping the data ie Data coming from the Legacy System format to SAP Format.
Transaction used LSMW.
The following Methods are supported by LSMW.
Batch Input
Direct Input
IDOC
BAPI
Direct Input
IDOC
BAPI
For carrying out the data transfer using LSMW following Steps need to be taken
- Maintain object attributes
- Maintain source structures
- Maintain source fields
- Maintain structure relations
- Maintain field mapping and conversion rules
- Maintain fixed values, translations, user-defined routin
- Specify files
- Assign files
- Read data
- Display read data
- Convert data
- Display converted data
- Create batch input session
- Run Batch Input session
- Start Direct Input program
- Start IDoc creation
- Start IDoc processing
- Create IDoc overview
- Start IDoc post-processing
- Frame program for periodic data transfer