Patent ID: 7912819

Claim:
A computer readable storage medium having stored thereon computer executable components of a system that facilitates identification of rows modified in a database, the components including: a base table component that stores a current version of a plurality of rows of data; a version store component, the version store component maintaining a copy of the current version of the plurality of rows of data, the version store component retaining a previous version of at least one of the plurality of rows of data, the version store component including a linkage component that links at least a subset of the plurality of rows in the copy in a new image chain and links the previous version of at least one of the plurality of rows of data into an old image chain, and an additional linkage component which represents a linkage of versioned records having different key values, and the version store component comprising a record store component which includes a record version history; and a scan interface that scans rows in an inserted/deleted table by following linkages in the new and old image chains to determine whether a chain should be maintained.