Sequenced modifications of multiple rows in a temporal table

Abstract

A SEQUENCED request a) to apply a temporal Source table to a temporal Target table under a predicate is received. The Source table includes a plurality of rows that qualify to apply to a single Target table row under the predicate. The predicate specifies a Source table join column. Each of the plurality of Source table rows and the single Target table row include a ValidTime dimension. The plurality of Source table rows is b) ordered by the Source table join column and a period-to-be-modified. The next of the ordered plurality of Source table rows is c) applied by determining that the Target table row has a TransactionTime and, in response, closing out the TransactionTime of the Target table row. Applying the next of the ordered plurality of Source table rows includes identifying an RDIFF range as the period-to-be-modified of the Source table row being applied that is later than the ValidTime range of the single Target table row. Applying the next of the ordered plurality of Source table rows includes creating an RDIFF row being the same as the Target table row except the ValidTime of the RDIFF row is set to RDIFF range. A second of the ordered plurality of Source table rows d) is applied by applying c) to the RDIFF row as the Target table row.