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SQL/DS: New Horizons
Eaton, Roger G.
One of the virtues of SQL/ OS is an optimizer to perform data access path selection. Because SQL/DS's optimizer determines data access paths, SQL/DS provides the EXPLAIN command to retrieve information about optimizer decisions. You may consider it a window to the instruction will examine (cardinality) and an estimate of the number of times each instruction will executed.
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Citation: Eaton, R. (1991). SQL/DS: New Horizons. DATA BASE Management: Data Base Information for the New Era, 1(7), 42-43
Rights:Copyright 1991 by Technical Enterprises, Inc. If you are the copyright holder of this work and would like to have this item removed, please contact Kansas State University Libraries. CADS@ksu.edu. (785) 532-7444.
