Difference between revisions of "Index Module"
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Revision as of 10:30, 19 February 2016
This XQuery Module provides functions for displaying information stored in the database index structures.
Contents
Conventions
All functions in this module are assigned to the http://basex.org/modules/index
namespace, which is statically bound to the index
prefix.
All errors are assigned to the http://basex.org/errors
namespace, which is statically bound to the bxerr
prefix.
Functions
index:facets
Signatures | index:facets($db as xs:string) as xs:string index:facets($db as xs:string, $type as xs:string) as xs:string
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Summary | Returns information about all facets and facet values of the database $db in document structure format.If $type is specified as flat , the function returns this information in a flat summarized version. The returned data is derived from the Path Index.
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Errors | BXDB0002 : The addressed database does not exist or could not be opened.
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Examples |
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index:texts
Signatures | index:texts($db as xs:string) as element(value)* index:texts($db as xs:string, $prefix as xs:string) as element(value)* index:texts($db as xs:string, $start as xs:string, $ascending as xs:boolean) as element(value)*
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Summary | Returns all strings stored in the Text Index of the database $db , along with their number of occurrences.If $prefix is specified, the returned entries will be refined to the ones starting with that prefix.If $start and $ascending are specified, all nodes will be returned after or before the specified start entry.
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Errors | BXDB0002 : The addressed database does not exist or could not be opened.BXDB0004 : the index is not available.
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index:attributes
Signatures | index:attributes($db as xs:string) as element(value)* index:attributes($db as xs:string, $prefix as xs:string) as element(value)* index:attributes($db as xs:string, $start as xs:string, $ascending as xs:boolean) as element(value)*
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Summary | Returns all strings stored in the Attribute Index of the database $db , along with their number of occurrences.If $prefix is specified, the returned entries will be refined to the ones starting with that prefix.If $start and $ascending are specified, all nodes will be returned after or before the specified start entry.
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Errors | BXDB0002 : The addressed database does not exist or could not be opened.BXDB0004 : the index is not available.
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index:tokens
Signatures | index:tokens($db as xs:string) as element(value)*
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Summary | Returns all strings stored in the Token Index of the database $db , along with their number of occurrences.
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Errors | BXDB0002 : The addressed database does not exist or could not be opened.BXDB0004 : the index is not available.
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index:element-names
Signatures | index:element-names($db as xs:string) as element(value)*
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Summary | Returns all element names stored in the Name Index of the database $db , along with their number of occurrences.
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Errors | BXDB0002 : The addressed database does not exist or could not be opened.
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index:attribute-names
Signatures | index:attribute-names($db as xs:string) as element(value)*
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Summary | Returns all attribute names stored in the Name Index of the database $db , along with their number of occurrences.
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Errors | BXDB0002 : The addressed database does not exist or could not be opened.
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Changelog
- Version 8.4
- Added: index:token
- Version 7.7
- Updated: the functions no longer accept Database Nodes as reference. Instead, the name of a database must now be specified.
- Version 7.3
- Updated: index:texts, index:attributes: signature with three arguments added.
The module was introduced with Version 7.1.