International Business Machines Corporation

Luis Eduardo Guillen-Sanchez

Benjamin Michael Parees

David Michael Eads

David Michael Enyeart

Latha Sivakumar

Dan McBryde Willey

A method, system and computer program product for ensuring that archival data deleted in a source table is already stored in a target table. An external data source sets a flag in the first table to identify the row in the source table to be deleted. An application sets a flag in a second table for each row of the source table that is marked to be deleted according to the first table. The application performs uncommitted read operations on the source table for each row corresponding to the distinct primary key values stored in the first table. The application inserts the data read into the corresponding rows of the target table. The application deletes the rows in the source table indicated to be deleted by the second table. In this manner, the archival data deleted from the source table is ensured to already be stored in the target table.

Ensuring that the archival data deleted in relational source table is already stored in relational target table

A method, system and computer program product for performing synchronization between source and target tables. An external data source inserts a new row in a first table as it modifies or creates a row in the source table where each new row in the first table includes a primary key value associated with the modified/created row in the source table. An application copies the distinct values for the primary keys listed in the first table and inserts them in a second table. The application performs uncommitted read operations on the source table for each row corresponding to the primary key values stored in the second table. The application inserts the data read into the corresponding rows of the target table. In this manner, a platform agnostic application may be able to synchronize the relational source and target tables in an efficient manner while minimizing the contention at the source table.

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Luis Eduardo Guillen-Sanchez