File to Jdbc: how to get record count from DB table
Hello,
i have a scenario file to JDBC....ihave to insert input file data to DB table.
now my requirement is ..if i insert a file with 50 records to db table on first time, and then next time if i insert the file with 100 records to db table....the count should start from 51 in db table.
if i insert another file 3rd time, with 25 records, the count shold start from 151...so how can i achieve this functionality....
i think following options:
1. in mapping write lookup to call JDBC sender channel and fetch count and map same to target filed of DB. if this is ok...please provide UDF code..2. db triggers (not suitable for my req.)
So kindly let meknow possible solutions and required UDF codes..please
Thanks in advance...SARAN
>>>..if i insert a file with 50 records to db table on first time, and then next time if i insert the file with 100 records to db table....the count should start from 51 in db table.
if i insert another file 3rd time, with 25 records, the count shold start from 151...so how can i achieve this functionality....
i think following options:
Suggestions:
1)Create an id column in db table. Talk to DB guy to create oracle sequencer for that column. So, every time you insert record that field will be updated with oracle sequencer. You dont need to handle this.
Refer this link
http://www.techonthenet.com/oracle/sequences.php
2) If you want to handle via pi, following suggestions..
If you use PI 7.1 or above, use jdbc lookup in the mapping and do the query something like this
Refer this link
/people/jin.shin/blog/2008/02/15/sap-pi-71-mapping-enhancements-series-graphical-support-for-jdbc-and-rfc-lookups
Do select query as below
select count(*) from tablename;
the above query will return number of rows exist in the table. So use that value and map it in the target field.
If you use pi 7.0 or below then use the previous reply and do the UDF implementation for jdbc lookup during mapping. Because jdbc lookup does not support in those versions.
Hope that helps.
Baskar
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