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functx:value-union

The union of two sequences of values

Description

The functx:value-union function returns the union of the values in two sequences in an implementation-defined order. It removes duplicates, even among the values that appear only in one of the sequences. This function is useful because the built-in union (or "|") operator only works on nodes, not atomic values.

Arguments and Return Type

XQuery Function Declaration

declare namespace functx = "http://www.functx.com";
declare function functx:value-union
  ( $arg1 as xs:anyAtomicType* ,
    $arg2 as xs:anyAtomicType* )  as xs:anyAtomicType* {

  distinct-values(($arg1, $arg2))
 } ;

Examples

functx:value-union((1,2),(3,4))

(1, 2, 3, 4)

functx:value-union((1,2,3),(2,3,4))

(1, 2, 3, 4)

functx:value-union((1,2,2,3),(3,4))

(1, 2, 3, 4)

functx:value-union((1,2,2,3),())

(1, 2, 3)

See Also

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