Teradata Us, Inc.

Tirupathi Prabhu Bellapukonda

Bhashyam Ramesh

Donald Raymond Pederson

Philip Jason Benton

Mohan Kumar Kj

Vamshi Krishna Vangapalli

A database includes a Value List Compression (VLC) predicate evaluator. A table identified in a query that is being processed is identified as having compressed data values. The predicate evaluator compares a query predicate of the query against actual decompressed values noted in a dictionary for the table and the predicate evaluator maintains a bitmap for selective ones of the actual values that satisfy the query predicate. The matched bitmap positions are processed against an index maintained in the table for the actual values to provide selective decompressed table entries as results for the query.

Value list compression (VLC) aware qualification

A method for performing row qualification in database table retrieval and join operations. This method, referred to as bulk qualification, evaluates conditions on multiple rows in a database table at the same time, providing more efficient utilization of memory bandwidth and CPU throughput.

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Hyderabad Telangana, India

Tirupathi Prabhu Bellapukonda