Description
The fn:min function finds the minimum of a sequence of values. The $arg sequence can only contain values of one type, or a type derived from it. The one exception is that they can be all numeric, in which case numeric promotion rules apply. That type must be ordered; it must be possible to compare the values using the < and > operators.
The fn:min function assumes untyped values are numeric unless they are explicitly cast to xs:string. To treat untyped data as strings, use the fn:string function as shown in the last example below.
This description is © Copyright 2007, O'Reilly Media. It is excerpted from the book XQuery by Priscilla Walmsley, O'Reilly, 2007. For a complete explanation of this function, please refer to Appendix A of the book. Arguments and Return Type| Name | Type | Description |
|---|
$arg |
xs:anyAtomicType* |
the sequence of values |
$collation |
xs:string |
the collation to use for comparing strings |
| return value |
xs:anyAtomicType? |
Examples| XQuery Example | Results |
|---|
min( (2.0, 1, 3.5, 4) )
|
1
|
min( ('a', 'b', 'c') )
|
a
|
min($ordDoc//item/@color)
|
Error FORG0006, if color is untyped |
min($ordDoc//item//string(@color))
|
zero-length string |
min($ordDoc//item/@color/string(.))
|
beige
|
See AlsoHistory |
|
