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Abstract
En 中文
We study the complexity of processing a class of rules called simple binary rule sets. The data referenced by the rules are stored in secondary memory. A necessary and sufficient condition that a simple binary rule set can be processed in a single pass of a file containing the base relations is given. Because not all simple binary rule sets can be processed in a single pass, a necessary and sufficient condition that a simple binary rule set can be processed by a constant number of passes is also given.
Keywords:
CONSTANT-PASS PROCESSABLE
LINEAR CHAIN RULE
ONE-PASS PROCESSABLE
RECURSIVE QUERY PROCESSING
SIMPLE BINARY RULE
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