Incremental Data Extraction

Define a logic to incrementally extract data through an Informatica Mapping. On every session run, the mapping should start loading data from the row where it ended loading in the last run. There is column rowdatetime for every row in the table.

Solution:

Create a user defined mapping variable $$LastUpdateDateTime that saves the timestamp of the last row, the integration service read in the previous session. There is a build-in variable $$SessStartTime for the end time stamp. Use the following filter in source filter of source qualifier to incremetally extract data:

Mytable.rowdatetime > TO_DATE('$$LastUpdateDateTime') and mytable.rowdatetime < TO_DATE('$$SessStartTime')