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:
Feb. 12, 2019
Filed:
May. 04, 2016
Oracle International Corporation, Redwood Shores, CA (US);
Aurosish Mishra, Belmont, CA (US);
Shasank K. Chavan, Menlo Park, CA (US);
Allison L. Holloway, San Carlos, CA (US);
Jesse Kamp, Castro Valley, CA (US);
Ramesh Kumar, Foster City, CA (US);
Zhen Hua Liu, San Mateo, CA (US);
Niloy Mukherjee, Belmont, CA (US);
Amit Ganesh, San Jose, CA (US);
Tirthankar Lahiri, Palo Alto, CA (US);
Vineet Marwah, San Ramon, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
Techniques are described for materializing pre-computed results of expressions. In an embodiment, a set of one or more column units are stored in volatile or non-volatile memory. Each column unit corresponds to a column that belongs to an on-disk table within a database managed by a database server instance and includes data items from the corresponding column. A set of one or more virtual column units, and data that associates the set of one or more column units with the set of one or more virtual column units, are also stored in memory. The set of one or more virtual column units includes a particular virtual column unit storing results that are derived by evaluating an expression on at least one column of the on-disk table.