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DataServer for Microsoft SQL Server
Initial Programming Considerations : Cursors : Block cursors

Block cursors

Block cursors are available as a performance enhancement. They allow blocks of records to be bound and fetched together from a single database request, thus reducing the network overhead and minimizing record copies for ABL queries and finds, and minimizing record copies.
* Considering when to use block cursors and firehose block cursors
* Additional details about block cursor behavior
* Block cursors on versus off
* Block versus lookahead cursors