upsert for doc-cache insert

project.clj

-(defproject document-storage "0.2.2"
+(defproject document-storage "0.2.3"
   :description "FIXME: write description"
   :repositories [["internal" {:url "https://leukipp.fh-muenster.de:9082/releases"
                               :username "anonymous"}]]
@@ -15,7 +15,7 @@
                  [luminus-migrations "0.7.1"]
                  [com.cognitect/transit-clj "1.0.324"]
                  [conman "0.9.0"]
-                 [wwsoftware/clj-helper "0.0.3.5"]
+                 [wwsoftware/clj-helper "0.0.3.10"]
                  [org.postgresql/postgresql "42.2.14"]]
   :profiles {:test [:project/test :profiles/test]
              :dev [:project/dev :profiles/dev]

resources/sql/_ds_postgres_cache.sql

@@ -3,7 +3,8 @@
 INSERT INTO :i:cache-table
             (repository, "document", "version", "data")
 VALUES (:repository-name, :document-id, :version, :data)
-
+       ON CONFLICT(repository, "document", "version")
+       DO UPDATE SET "data" = :data
 
 -- :name get-cached-document :? :1
 -- :doc retrieve cached document.