Add missing operators to list and add more error handling.

project.clj

@@ -1,4 +1,4 @@
-(defproject views "0.4.8"
+(defproject views "0.4.9"
   :description "You underestimate the power of the SQL side"
 
   :url "https://github.com/diligenceengine/views"

src/views/db/deltas.clj

@@ -85,10 +85,15 @@
 
 (defn- calculate-delete-deltas
   [db view-map]
+  (try
     (->> (:delete-deltas-map view-map)
          hsql/format
          (j/query db)
-       (assoc view-map :delete-deltas)))
+         (assoc view-map :delete-deltas))
+    (catch Exception e
+      (error "computing delete deltas for" view-map)
+      (log-exception e)
+      (throw e))))
 
 (defn compute-delete-deltas-for-insert
   "Computes and returns a sequence of delete deltas for a single view and insert."

src/views/db/honeysql.clj

@@ -7,8 +7,10 @@
 (def table-clauses
   [:from :insert-into :update :delete-from :join :left-join :right-join])
 
+;; This list doesn't support custom operators. Is there something else we can do?
 (def pred-ops
-  #{:= :< :> :<> :>= :<= :in :between :match :ltree-match :and :or :not=})
+  #{:= :< :> :<> :>= :<= :in :between :match :ltree-match :and :or :not= :like :xor :regexp :not-in :not-like
+    :!= :is :is-not})
 
 (defn process-complex-clause
   [tables clause]