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:
Jun. 02, 2020
Filed:
Mar. 31, 2017
International Business Machines Corporation, Armonk, NY (US);
Brian L. Baggett, Renton, WA (US);
Allan B. Lebovitz, Morgan Hill, CA (US);
Terence P. Purcell, Springfield, IL (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Provided are techniques for reduced fixed length sort of variable length columns. A fixed length sort is performed to sort a table having rows for a query, wherein the fixed length sort is based on a sort key comprised of a variable length column. A pre-determined number of the rows are read to identify the variable length column as a candidate for truncation. A length for truncating the variable length column is determined based on database statistics and based on the reading of the pre-determined number of the rows. The variable length column is truncated to the determined length to output a truncated variable length column for the sort key. The rows are sorted on the sort key having the truncated variable length column. Results are generated using the sorted rows and returned for the query.