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')
Posts
negative regexp
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if you want to grep anything except foo, use grep -v or negative lookahead
echo -e 'foo\nbar\nboz'|grep -P '^(?!.*foo).*$' bar boz it is just so
beautiful ...
1 month ago
2 comments:
Hello,
The incremental technique is a way to solve the issue of added-in data without re-implementing the original algorithm in a dynamic database. Extraction is the operation of extracting data from a source system for further use in a data warehouse environment. Thanks a lot.
Thank you so much for providing Informatica and highlighting its usage and prospects to the extreme level.
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