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Enumerated and Indexed Resolution

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Note

Indexing Service is no longer supported as of Windows XP and is unavailable for use as of Windows 8. Instead, use Windows Search for client side search and Microsoft Search Server Express for server side search.

 

Executing queries that must be enumerated can also slow down performance. Most queries are resolved by using the Content Index, but certain conditions force the query engine to search the disk to locate matching files. These queries include:

  • Regular expressions on properties other than FileName which begin with any special regular expression character.
  • Regular expressions on FileName which both begin and end with any special regular expression character.
  • Property value queries when the CiForceUseCi parameter is set to FALSE and the index is not up to date.
  • Property value queries involving regular expressions that start and end with any special regular-expression characters (for example, #filename *sample*).
  • Certain property value queries involving OR (such as @write > -1d OR @create > -1d).

Queries can be forced to use the Content Index by setting CiForceUseCi to TRUE in the .idq file. The query engine will always use the Content Index, but query results may be out of date for recently modified files. If the Content Index was used for a query, and some files on disk have been modified more recently than their contents have been filtered, the built-in variable CiOutOfDate will be set to the value 1. In some cases, a query is simply too complex to be resolved solely through use of the Content Index. In these cases, the built-in variable CiQueryIncomplete will be set to 1. Content queries can always be out of date and can use the Content Index anytime.