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Focal Point Forums iWay Software Product Forum on Focal Point [SOLVED]how to keep track append records? Read-Only TopicGo | Search | Notify | Tools |
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| Platinum Member |
Hi, Using iWay Datamigrator(ETL)- Let's say I have a table(Source) name "Product" with over 10k records within and Load into another table "Product_update". In next day, I have another 1250 records are updated to "Product". So total of my "Product" table contain 11,250 records and I want to append ONLY those 1250 records. How to keep track where I loaded last time(in this case would be up to record NO. 10,000 and begin append from NO. 10,001)? Or iWay Datamigrator keep track this information already?This message has been edited. Last edited by: nox, WebFOCUS v8.2.06 , Windows | ||
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| Guru |
There's an add-on to DataMigrator for most of the major relational databases called "Change Data Capture" the reads database logs, archives or journals in order to process just the changes. It automatically keeps track of the last record read from the database logs so that when run the next it can take up where it left off. Without that it depends on how your source table is designed. If the key to the table is an automatically incrementing number, and no records are ever updated or deleted, then you could keep track of that number after running the flow and use it in a WHERE condition the next time. N/A | |||
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| Platinum Member |
this is similar idea that I have in mind, but how to keep track the updated 'value' is what hurting my brain. Any start up? WebFOCUS v8.2.06 , Windows | |||
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| Virtuoso |
Nox It sounds like Clif's scenario where the key to the table is automatically incremented.. Right.. If so you can use a DM stored procedure prior to the data flow to retrieve the HIGHEST value of the key put that in a HOLD file and do a -READFILE to put is in a variable that you use in the WHERE statement of the flow to start at that record. Something like below The &variable name will be the same as the keyfield name in the request. Thank you for using Focal Point! Chuck Wolff - Focal Point Moderator WebFOCUS 7x and 8x, Windows, Linux All output Formats | |||
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| Platinum Member |
Hi Chuck, Thanks for the advice, I end up solving this in another way by doing a join between source table and counter table(keep track of loaded records) to append into both target and counter table(delete all row prior load) WHERE source records are greater than previous counter table's number. WebFOCUS v8.2.06 , Windows | |||
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