The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 2021
Filed:
Jan. 14, 2020
International Business Machines Corporation, Armonk, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Optimizing database table scans in presence of SMDO records is provided. An SMDO record corresponding to a most recent span of rows for a column associated with a query predicate is read. It is determined whether a condition for excluding a span of rows is true for the SMDO record based on a type of the query predicate. In response to determining that a condition for excluding a span of rows is not true for the SMDO record, the most recent span of rows is added to a list of spans of rows to scan. It is determined whether a condition for excluding all preceding spans of rows is true for the SMDO record based on the type of the query predicate. In response to determining that a condition for excluding all preceding spans of rows is true for the SMDO record, reading the set of SMDO records is stopped.