From bb9d7ab5bd2a537a0dc374930f381c369de5c398 Mon Sep 17 00:00:00 2001
From: Sergey Akopov <info@sergeyakopov.com>
Date: Sat, 26 Nov 2016 13:09:50 -0700
Subject: [PATCH] Add ExecuteScalarAsync support.

---
 .../IAmbientDbContextQueryProxy.cs            | 80 +++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/source/Dapper.AmbientContext/IAmbientDbContextQueryProxy.cs b/source/Dapper.AmbientContext/IAmbientDbContextQueryProxy.cs
index 2e2842a..6004200 100644
--- a/source/Dapper.AmbientContext/IAmbientDbContextQueryProxy.cs
+++ b/source/Dapper.AmbientContext/IAmbientDbContextQueryProxy.cs
@@ -39,6 +39,86 @@ namespace Dapper.AmbientContext
     /// </summary>
     public interface IAmbientDbContextQueryProxy
     {
+        /// <summary>
+        /// Execute parameterized SQL that selects a single value asynchronously using 
+        /// .NET 4.5 <see cref="System.Threading.Tasks.Task"/>.
+        /// </summary>
+        /// <param name="sql">
+        /// The SQL statement to execute.
+        /// </param>
+        /// <param name="param">
+        /// The SQL query parameters.
+        /// </param>
+        /// <param name="commandTimeout">
+        /// The number of seconds before command execution timeout.
+        /// </param>
+        /// <param name="commandType">
+        /// Determines whether the command is a stored procedure or a batch.
+        /// </param>
+        /// <returns>
+        /// The first cell selected.
+        /// </returns>
+        Task<object> ExecuteScalarAsync(
+            string sql,
+            object param = null,
+            int? commandTimeout = null,
+            CommandType? commandType = null);
+
+        /// <summary>
+        /// Execute parameterized SQL that selects a single value asynchronously using 
+        /// .NET 4.5 <see cref="System.Threading.Tasks.Task"/>.
+        /// </summary>
+        /// <typeparam name="T">
+        /// The return type.
+        /// </typeparam>
+        /// <param name="sql">
+        /// The SQL statement to execute.
+        /// </param>
+        /// <param name="param">
+        /// The SQL query parameters.
+        /// </param>
+        /// <param name="commandTimeout">
+        /// The number of seconds before command execution timeout.
+        /// </param>
+        /// <param name="commandType">
+        /// Determines whether the command is a stored procedure or a batch.
+        /// </param>
+        /// <returns>
+        /// The first cell selected.
+        /// </returns>
+        Task<T> ExecuteScalarAsync<T>(
+            string sql,
+            object param = null,
+            int? commandTimeout = null,
+            CommandType? commandType = null);
+
+        /// <summary>
+        /// Execute parameterized SQL that selects a single value asynchronously using 
+        /// .NET 4.5 <see cref="System.Threading.Tasks.Task"/>.
+        /// </summary>
+        /// <param name="command">
+        /// The SQL command definition.
+        /// </param>
+        /// <returns>
+        /// The first cell selected.
+        /// </returns>
+        Task<object> ExecuteScalarAsync(CommandDefinition command);
+
+        /// <summary>
+        /// Execute parameterized SQL that selects a single value asynchronously using 
+        /// .NET 4.5 <see cref="System.Threading.Tasks.Task"/>.
+        /// </summary>
+        /// <typeparam name="T">
+        /// The return type.
+        /// </typeparam>
+        /// <param name="command">
+        /// The SQL command definition.
+        /// </param>
+        /// <returns>
+        /// The first cell selected.
+        /// </returns>
+        Task<T> ExecuteScalarAsync<T>(CommandDefinition command);
+
         /// <summary>
         /// Execute a query asynchronously using .NET 4.5 <see cref="System.Threading.Tasks.Task"/>.
         /// </summary>