adds Supported features check.

microsoft · Jan 23, 2025 · 2921b16 · 2921b16
1 parent 00f5877
commit 2921b16
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Showing 3 changed files with 13 additions and 3 deletions.
diff --git a/src/libraries/Microsoft.PowerFx.Connectors/Public/CdpTableValue.cs b/src/libraries/Microsoft.PowerFx.Connectors/Public/CdpTableValue.cs
@@ -44,6 +44,11 @@ internal CdpTableValue(IRContext irContext)
 
         public override IEnumerable<DValue<RecordValue>> Rows => GetRowsAsync(null, null, CancellationToken.None).ConfigureAwait(false).GetAwaiter().GetResult();
 
+        public DelegationParameterFeatures SupportedFeatures => DelegationParameterFeatures.Filter |
+                DelegationParameterFeatures.Top |
+                DelegationParameterFeatures.Columns | // $select
+                DelegationParameterFeatures.Sort; // $orderby
+
         public async Task<IReadOnlyCollection<DValue<RecordValue>>> GetRowsAsync(IServiceProvider services, DelegationParameters parameters, CancellationToken cancel)
         {
             if (parameters == null && _cachedRows != null)

diff --git a/src/libraries/Microsoft.PowerFx.Core/Public/Values/DelegationParameters.cs b/src/libraries/Microsoft.PowerFx.Core/Public/Values/DelegationParameters.cs
@@ -76,15 +76,15 @@ public enum DelegationParameterFeatures
         // $apply = groupby((field1, ..), field with sum as TotalSum)
         ApplyGroupBy = 1 << 5,
 
+        // $count
+        Count = 1 << 6,
+
         /*
           To be implemented later when needed
          
         // $compute
         Compute = 1 << 5,
 
-        // $count
-        Count = 1 << 6,
-
         // $expand
         Expand = 1 << 7,
 

diff --git a/src/libraries/Microsoft.PowerFx.Core/Public/Values/TableValue.cs b/src/libraries/Microsoft.PowerFx.Core/Public/Values/TableValue.cs
@@ -37,6 +37,11 @@ public interface IDelegatableTableValue
         /// <param name="parameters">Delegation parameters.</param>
         /// <param name="cancel"></param>
         Task<FormulaValue> ExecuteQueryAsync(IServiceProvider services, DelegationParameters parameters, CancellationToken cancel);
+
+        /// <summary>
+        /// Supported features for delegation to verify correct Features are delegated at runtime.
+        /// </summary>
+        DelegationParameterFeatures SupportedFeatures { get; }
     }
 
     /// <summary>