Implement ZUNIONSTORE and ZINTERSTORE

StackExchange.Redis/StackExchange.Redis.csproj

@@ -63,6 +63,7 @@
     <Reference Include="System.IO.Compression" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="StackExchange\Redis\Aggregate.cs" />
     <Compile Include="StackExchange\Redis\RedisChannel.cs" />
     <Compile Include="StackExchange\Redis\Bitwise.cs" />
     <Compile Include="StackExchange\Redis\ClientFlags.cs" />

StackExchange.Redis/StackExchange/Redis/Aggregate.cs

+namespace StackExchange.Redis
+{
+    /// <summary>
+    /// Specifies how elements should be aggregated when combining sorted sets
+    /// </summary>
+    public enum Aggregate
+    {
+        /// <summary>
+        /// The values of the combined elements are added
+        /// </summary>
+        Sum,
+        /// <summary>
+        /// The least value of the combined elements is used
+        /// </summary>
+        Min,
+        /// <summary>
+        /// The greatest value of the combined elements is used
+        /// </summary>
+        Max
+    }
+}

StackExchange.Redis/StackExchange/Redis/RedisLiterals.cs

@@ -44,6 +44,10 @@ public static readonly RedisValue
             DESC = "DESC",
             ALPHA = "ALPHA",
             STORE = "STORE",
+            WEIGHTS = "WEIGHTS",
+            MIN = "MIN",
+            MAX = "MAX",
+            AGGREGATE = "AGGREGATE",
 
             // DO NOT CHANGE CASE: these are configuration settings and MUST be as-is
             databases = "databases",