From 94eef1e3e975bf5d67cbec452437311471d17538 Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Sat, 16 Sep 2017 01:49:23 +0800
Subject: [PATCH] Subquery

---
 .../ExpressionsToSql/DbMethods/SqlFunc.cs     |  6 +++
 .../Subquery/Items/ISubAction.cs              | 15 +++++++
 .../ExpressionsToSql/Subquery/Items/SubAny.cs | 32 +++++++++++++++
 .../Subquery/Items/SubBegin'.cs               | 32 +++++++++++++++
 .../Subquery/Items/SubFromTable.cs            | 31 +++++++++++++++
 .../Subquery/Items/SubSelect.cs               | 37 ++++++++++++++++++
 .../Subquery/Items/SubWhere.cs                | 34 ++++++++++++++++
 .../ExpressionsToSql/Subquery/Subquerable.cs  | 39 +++++++++++++++++++
 Src/Asp.Net/SqlSugar/SqlSugar.csproj          |  7 ++++
 9 files changed, 233 insertions(+)
 create mode 100644 Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/ISubAction.cs
 create mode 100644 Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubAny.cs
 create mode 100644 Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubBegin'.cs
 create mode 100644 Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubFromTable.cs
 create mode 100644 Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubSelect.cs
 create mode 100644 Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubWhere.cs
 create mode 100644 Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Subquerable.cs

diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs
index f0a00ccc6..4da350ffe 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs
@@ -102,5 +102,11 @@ namespace SqlSugar
         /// <param name="value"></param>
         /// <returns></returns>
         public static TResult GetSelfAndAutoFill<TResult>(TResult value) { throw new NotSupportedException("Can only be used in expressions"); }
+        /// <summary>
+        /// Subquery
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <returns></returns>
+        public static Subqueryable<T> Subqueryable<T>() where T:class,new(){ throw new NotSupportedException("Can only be used in expressions");}
     }
 }
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/ISubAction.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/ISubAction.cs
new file mode 100644
index 000000000..42aa2f828
--- /dev/null
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/ISubAction.cs
@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace SqlSugar
+{
+    public interface ISubOperation
+    {
+        string Name { get; }
+        string GetValue(ExpressionContext context, Expression expression);
+        int Sort { get; }
+    }
+}
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubAny.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubAny.cs
new file mode 100644
index 000000000..6aa2f35fe
--- /dev/null
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubAny.cs
@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace SqlSugar
+{
+    public class SubAny : ISubOperation
+    {
+        public string Name
+        {
+            get
+            {
+                return "Any";
+            }
+        }
+
+        public int Sort
+        {
+            get
+            {
+                return 1000;
+            }
+        }
+
+        public string GetValue(ExpressionContext context, Expression expression)
+        {
+            return ">0";
+        }
+    }
+}
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubBegin'.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubBegin'.cs
new file mode 100644
index 000000000..2b0d2aa65
--- /dev/null
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubBegin'.cs
@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace SqlSugar
+{
+    public class SubBegin : ISubOperation
+    {
+        public string Name
+        {
+            get
+            {
+                return "Begin";
+            }
+        }
+
+        public int Sort
+        {
+            get
+            {
+                return 100;
+            }
+        }
+
+        public string GetValue(ExpressionContext context, Expression expression)
+        {
+            return "SELECT";
+        }
+    }
+}
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubFromTable.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubFromTable.cs
new file mode 100644
index 000000000..bfef1348b
--- /dev/null
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubFromTable.cs
@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace SqlSugar
+{
+    public class SubFromTable : ISubOperation
+    {
+        public string Name
+        {
+            get
+            {
+                throw new NotImplementedException();
+            }
+        }
+
+        public int Sort
+        {
+            get
+            {
+                return 300;
+            }
+        }
+        public string GetValue(ExpressionContext context, Expression expression = null)
+        {
+            return context.GetTranslationTableName(expression.Type.Name, true);
+        }
+    }
+}
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubSelect.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubSelect.cs
new file mode 100644
index 000000000..38facb47c
--- /dev/null
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubSelect.cs
@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace SqlSugar
+{
+    public class SubSelect : ISubOperation
+    {
+        public string Name
+        {
+            get
+            {
+                return "Select";
+            }
+        }
+
+        public int Sort
+        {
+            get
+            {
+                return 200;
+            }
+        }
+
+        public string GetValue(ExpressionContext context, Expression expression = null)
+        {
+           var newContext=context.GetCopyContext();
+            newContext.ParameterIndex = context.ParameterIndex;
+            newContext.Resolve(expression, ResolveExpressType.SelectMultiple);
+            context.Parameters.AddRange(newContext.Parameters);
+            context.ParameterIndex = newContext.ParameterIndex;
+            return newContext.Result.GetResultString();
+        }
+    }
+}
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubWhere.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubWhere.cs
new file mode 100644
index 000000000..393090e8e
--- /dev/null
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Items/SubWhere.cs
@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace SqlSugar.ExpressionsToSql.Subquery
+{
+    public class SubWhere : ISubOperation
+    {
+        public string Name
+        {
+            get { return "Where"; }
+        }
+
+        public int Sort
+        {
+            get
+            {
+                return 400;
+            }
+        }
+
+        public string GetValue(ExpressionContext context, Expression expression = null)
+        {
+            var newContext = context.GetCopyContext();
+            newContext.ParameterIndex = context.ParameterIndex;
+            newContext.Resolve(expression, ResolveExpressType.WhereMultiple);
+            context.Parameters.AddRange(newContext.Parameters);
+            context.ParameterIndex = newContext.ParameterIndex;
+            return newContext.Result.GetResultString();
+        }
+    }
+}
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Subquerable.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Subquerable.cs
new file mode 100644
index 000000000..3fd640cb7
--- /dev/null
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Subquery/Subquerable.cs
@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Text;
+
+namespace SqlSugar
+{
+    /// <summary>
+    /// 开发中....
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    public class Subqueryable<T> where T : class, new()
+    {
+        public Subqueryable<T> Where(Func<T, bool> expression)
+        {
+            return this;
+        }
+
+        public TResult Select<TResult>(Func<T, TResult> expression) where TResult :struct
+        {
+            return default(TResult);
+        }
+        public string Select(Func<T, string> expression) 
+        {
+            return default(string);
+        }
+
+        public bool Any()
+        {
+            return default(bool);
+        }
+
+        public bool Count()
+        {
+            return default(bool);
+        }
+    }
+}
diff --git a/Src/Asp.Net/SqlSugar/SqlSugar.csproj b/Src/Asp.Net/SqlSugar/SqlSugar.csproj
index 947634899..cd36de44b 100644
--- a/Src/Asp.Net/SqlSugar/SqlSugar.csproj
+++ b/Src/Asp.Net/SqlSugar/SqlSugar.csproj
@@ -72,6 +72,13 @@
     <Compile Include="Abstract\InsertableProvider\InsertableProvider.cs" />
     <Compile Include="Abstract\DeleteProvider\DeleteableProvider.cs" />
     <Compile Include="Enum\DbType.cs" />
+    <Compile Include="ExpressionsToSql\Subquery\Items\ISubAction.cs" />
+    <Compile Include="ExpressionsToSql\Subquery\Items\SubFromTable.cs" />
+    <Compile Include="ExpressionsToSql\Subquery\Items\SubAny.cs" />
+    <Compile Include="ExpressionsToSql\Subquery\Items\SubBegin%27.cs" />
+    <Compile Include="ExpressionsToSql\Subquery\Items\SubSelect.cs" />
+    <Compile Include="ExpressionsToSql\Subquery\Subquerable.cs" />
+    <Compile Include="ExpressionsToSql\Subquery\Items\SubWhere.cs" />
     <Compile Include="Infrastructure\DependencyManagement.cs" />
     <Compile Include="Utilities\JsonHelper.cs" />
     <Compile Include="Utilities\ReflectionExtensions.cs" />