feat(csharp/src/Drivers/Databricks): Move DescribeTableExtended to version negotiator (#3137)

Author: toddmeng-db

csharp/src/Drivers/Databricks/DatabricksConnection.cs

@@ -282,7 +282,7 @@ private void ValidateProperties()
         /// <summary>
         /// Check if current connection can use `DESC TABLE EXTENDED` query
         /// </summary>
-        internal bool CanUseDescTableExtended => _useDescTableExtended && ServerProtocolVersion != null && ServerProtocolVersion >= TProtocolVersion.SPARK_CLI_SERVICE_PROTOCOL_V7;
+        internal bool CanUseDescTableExtended => _useDescTableExtended && ServerProtocolVersion != null && FeatureVersionNegotiator.SupportsDESCTableExtended(ServerProtocolVersion.Value);
 
         /// <summary>
         /// Gets whether PK/FK metadata call is enabled

csharp/src/Drivers/Databricks/FeatureVersionNegotiator.cs

@@ -97,9 +97,18 @@ public static bool SupportsPKFK(TProtocolVersion protocolVersion) =>
         * V7 introduced the following features:
         * - isStagingOperation
         * - resultPersistenceMode: server will determine if this can be enabled
+        * - DESC TABLE EXTENDED support
 
         */
 
+        /// <summary>
+        /// Gets whether DESC TABLE EXTENDED queries are supported.
+        /// </summary>
+        /// <param name="protocolVersion">The current protocol version.</param>
+        /// <returns>True if DESC TABLE EXTENDED is supported; otherwise, false.</returns>
+        public static bool SupportsDESCTableExtended(TProtocolVersion protocolVersion) =>
+            SupportsProtocolVersion(protocolVersion, TProtocolVersion.SPARK_CLI_SERVICE_PROTOCOL_V7);
+
         #endregion
 
         #region Protocol Version V8 Features