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Indices

In: A Course in In-Memory Data Management

Author

Listed:
  • Hasso Plattner

    (Hasso Plattner Institute)

Abstract

In row-oriented database systems indices are used to speed up access on columns that are often used for data selection (e.g. primary key attributes). Without indices a full table scan has to be performed when the data is stored row-wise. In column-oriented databases systems a data select operation on any attribute only requires a column scan. This is performed much faster than a complete table scan. Consequently, in many use cases additional indices are not required. The following chapter describes the usage of additional index structures in column-oriented tables, called inverted indices.

Suggested Citation

  • Hasso Plattner, 2014. "Indices," Springer Books, in: A Course in In-Memory Data Management, edition 2, chapter 0, pages 125-133, Springer.
    • Handle: RePEc:spr:sprchp:978-3-642-55270-0_18
    DOI: 10.1007/978-3-642-55270-0_18
    as

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