gnu: Add julia-queryoperators.

* gnu/packages/julia-xyz.scm (julia-queryoperators-0.9.1): New variable.

gnu/packages/julia-xyz.scm

@@ -1772,3 +1772,29 @@ it easier to implement various @code{Base.show} functions for types that
 participate in the TableTraits.jl ecosystem.  Most users will probably not
 have any direct use for this package.")
     (license license:expat)))
+
+(define-public julia-queryoperators
+  (package
+    (name "julia-queryoperators")
+    (version "0.9.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/queryverse/QueryOperators.jl")
+             (commit (string-append "v" version))))
+       (file-name "QueryOperators")
+       (sha256
+        (base32 "0phia28rwz49bdiyakpag3isnk9wiqmzigfcnyb42mymx65x8841"))))
+    (propagated-inputs `(("julia-datavalues" ,julia-datavalues)
+                         ("julia-datastructures" ,julia-datastructures)
+                         ("julia-tableshowutils" ,julia-tableshowutils)
+                         ("julia-iteratorinterfaceextensions"
+                          ,julia-iteratorinterfaceextensions)))
+    (build-system julia-build-system)
+    (home-page "https://github.com/queryverse/QueryOperators.jl")
+    (synopsis "This package contains the query operators that are exposed to
+in Query.jl")
+    (description "This package contains the underlying query operators that
+are exposed to users in @code{Query.jl}.")
+    (license license:expat)))