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:
Jan. 18, 2011
Filed:
Sep. 05, 2003
James W. Warner, Mountain View, CA (US);
Muralidhar Krishnaprasad, Fremont, CA (US);
Anand Manikutty, Foster City, CA (US);
Zhen Liu, San Mateo, CA (US);
Ravi Murthy, Fremont, CA (US);
Susan Kotsovolos, San Carlos, CA (US);
Vikas Arora, San Francisco, CA (US);
James W. Warner, Mountain View, CA (US);
Muralidhar Krishnaprasad, Fremont, CA (US);
Anand Manikutty, Foster City, CA (US);
Zhen Liu, San Mateo, CA (US);
Ravi Murthy, Fremont, CA (US);
Susan Kotsovolos, San Carlos, CA (US);
Vikas Arora, San Francisco, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
Disclosed is a method and mechanism for processing expressions and operator trees. An approach is particularly useful to optimize processing of XML statements with respect to SQL operators. A top-down processing approach can be taken to directly output data from operators to a data stream. In addition, multiple processing approaches can be taken within a single expression tree, with some operators processed using the top-down approach and other operators processed with the bottom-up approach. Even data that can not be streamed is copied fewer times using this approach, intermediate values from bottom-up processing may still be streamed if it is used by an operator that is eligible for top-down processing.