程序代写代做代考 scheme algorithm database data structure AI SQL Week 07 Lectures
Week 07 Lectures Signature-based Selection Indexing with Signatures 2/103 Signature-based indexing: designed for pmr queries (conjunction of equalities) does not try to achieve better than O(n) performance attempts to provide an “efficient” linear scan Each tuple is associated with a signature a compact (lossy) descriptor for the tuple formed by combining information from multiple […]
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