Sargable

Sargable

In relational databases, a condition (or predicate) in a query is said to be sargable if the DBMS engine can take advantage of an index to speed up the execution of the query (using index seeks, not covering indexes). The term is derived from a contraction of "Search ARGument Able".

References

* "SQL Performance Tuning" by Peter Gulutzan, Trudy Pelzer (Addison Wesley, 2002) ISBN 0-201-79169-2 ( [http://www.informit.com/articles/article.aspx?p=30247 Chapter 2, "Simple "Searches"] )

See also

*Query optimizer


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Look at other dictionaries:

  • sargable — adjective being able to use indexes to speed up execution …   Wiktionary

  • Index (database) — A database index is a data structure that improves the speed of data retrieval operations on a database table at the cost of slower writes and increased storage space. Indexes can be created using one or more columns of a database table,… …   Wikipedia

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