Access path selection in a relational data base system . The following command will execute the hobby description for one employee over 70. The one with the expected least cost would be selected for execution. The optimization routines to support the special case that all queries in a given column differ only by a collection of parameters have not yet been implemented. The search engine remained unchanged, the transformation aspects of the first optimizer were reused.
System R employs a bottom up strategy, where the previous two optimizers are considered top down.
Access Path Selection in a Relational Database System . No context found. P. Selinger, M Astrahan, D. Chamberlin, R. Lorie, and T. Price. Access path selection in relational database systems . No context found.