CA2232938A1 - Method and apparatus for performing a join query in a database system - Google Patents

Method and apparatus for performing a join query in a database system

Info

Publication number
CA2232938A1
CA2232938A1 CA002232938A CA2232938A CA2232938A1 CA 2232938 A1 CA2232938 A1 CA 2232938A1 CA 002232938 A CA002232938 A CA 002232938A CA 2232938 A CA2232938 A CA 2232938A CA 2232938 A1 CA2232938 A1 CA 2232938A1
Authority
CA
Canada
Prior art keywords
join
database system
fragments
join query
record
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002232938A
Other languages
French (fr)
Other versions
CA2232938C (en
Inventor
Murali M. Krishna
Anurag Kashyap
Robert Howard Gerber
Paul Sherwood Taylor
Scott Alan Shurts
Shengsong Ni
Prakash Sundaresan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SAP SE
Original Assignee
Informix Software Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Informix Software Inc filed Critical Informix Software Inc
Publication of CA2232938A1 publication Critical patent/CA2232938A1/en
Application granted granted Critical
Publication of CA2232938C publication Critical patent/CA2232938C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24—Querying
    • G06F16/245—Query processing
    • G06F16/2455—Query execution
    • G06F16/24553—Query execution of query operations
    • G06F16/24561—Intermediate data storage techniques for performance improvement
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24—Querying
    • G06F16/245—Query processing
    • G06F16/2455—Query execution
    • G06F16/24553—Query execution of query operations
    • G06F16/24558—Binary matching operations
    • G06F16/2456—Join operations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99932—Access augmentation or optimizing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99933—Query processing, i.e. searching
    • Y10S707/99934—Query formulation, input preparation, or translation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99933—Query processing, i.e. searching
    • Y10S707/99935—Query augmenting and refining, e.g. inexact access

Abstract

A computer implemented method for generating a response to a join. Two tables are divided into fragments. A join fragment map identifies, for each respective fragment from the first table, the fragments from the second table which contain a record that satisfies the join predicate with a record from the respective fragment from the first table. The map is used to eliminate fragments which cannot satisfy the join predicate.
CA002232938A 1997-04-07 1998-03-24 Method and apparatus for performing a join query in a database system Expired - Lifetime CA2232938C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/833,519 1997-04-07
US08/833,519 US5987453A (en) 1997-04-07 1997-04-07 Method and apparatus for performing a join query in a database system

Publications (2)

Publication Number Publication Date
CA2232938A1 true CA2232938A1 (en) 1998-10-07
CA2232938C CA2232938C (en) 2006-07-04

Family

ID=25264637

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002232938A Expired - Lifetime CA2232938C (en) 1997-04-07 1998-03-24 Method and apparatus for performing a join query in a database system

Country Status (7)

Country Link
US (1) US5987453A (en)
EP (1) EP0877327B1 (en)
JP (1) JP4866495B2 (en)
AU (1) AU752283B2 (en)
BR (1) BR9804282A (en)
CA (1) CA2232938C (en)
DE (1) DE69839747D1 (en)

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Also Published As

Publication number Publication date
AU752283B2 (en) 2002-09-12
US5987453A (en) 1999-11-16
EP0877327B1 (en) 2008-07-23
MX9802587A (en) 1998-12-31
AU5943798A (en) 1998-10-08
CA2232938C (en) 2006-07-04
DE69839747D1 (en) 2008-09-04
JPH10320423A (en) 1998-12-04
JP4866495B2 (en) 2012-02-01
BR9804282A (en) 1999-11-16
EP0877327A2 (en) 1998-11-11
EP0877327A3 (en) 2000-09-06

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Effective date: 20180326