- Patent Title: Mixed join of row and column database tables in native orientation
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Application No.: US13323530Application Date: 2011-12-12
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Publication No.: US09965500B2Publication Date: 2018-05-08
- Inventor: Yongsik Yoon , Chanho Jeong , Sang Kyun Cha
- Applicant: Yongsik Yoon , Chanho Jeong , Sang Kyun Cha
- Applicant Address: DE Walldorf
- Assignee: SAP SE
- Current Assignee: SAP SE
- Current Assignee Address: DE Walldorf
- Agency: Fountainhead Law Group P.C.
- Main IPC: G06F17/30
- IPC: G06F17/30

Abstract:
A mixed join between database column and row tables employs an algorithm that recognizes both row and column store, and is executable upon the data in its native form (row or column) without requiring conversion between orientations. The native mixed join algorithm accesses the column dictionary of the column table for efficient join processing. The native mixed join algorithm may also exploit an inverted index (if present) to search a record (e.g. docid) with a given value. In particular, the native mixed join algorithm looks up a column dictionary for a join condition, while iterating the row table and returning matched records in a pipelined manner.
Public/Granted literature
- US20130151502A1 Mixed Join of Row and Column Database Tables in Native Orientation Public/Granted day:2013-06-13
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