Add SqlFunc.GetDate()

Src/Asp.Net/SqlServerTest/Demos/1_Query.cs

@@ -283,7 +283,7 @@ namespace OrmTest.Demo
 
             var getUnionAllList2 = db.UnionAll(db.Queryable<Student>(), db.Queryable<Student>()).ToList();
 
-            var test1 = db.Queryable<Student, School>((st, sc) => st.SchoolId == sc.Id).Select((st, sc) => SqlFunc.ToInt64(sc.Id)).ToList();
+            var test1 = db.Queryable<Student, School>((st, sc) => st.SchoolId == sc.Id).Where(st=>st.CreateTime>SqlFunc.GetDate()).Select((st, sc) => SqlFunc.ToInt64(sc.Id)).ToList();
         }
         public static void Page()
         {

Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/DefaultDbMethod.cs

@@ -275,7 +275,7 @@ namespace SqlSugar
         {
             var parameter = model.Args[0];
             var parameter1 = model.Args[1];
-            return string.Format("ISNULL({0},{1})",parameter.MemberName,parameter1.MemberName);
+            return string.Format("ISNULL({0},{1})", parameter.MemberName, parameter1.MemberName);
         }
 
         public virtual string True()
@@ -319,5 +319,10 @@ namespace SqlSugar
         {
             return "NULL";
         }
+
+        public virtual string GetDate()
+        {
+            return "GETDATE()";
+        }
     }
 }

Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/IDbMethods.cs

@@ -57,5 +57,6 @@ namespace SqlSugar
         string EqualTrue(string value);
         string Pack(string sql);
         string Null();
+        string GetDate();
     }
 }

Src/Asp.Net/SqlSugar/ExpressionsToSql/DbMethods/SqlFunc.cs

@@ -109,6 +109,7 @@ namespace SqlSugar
         /// <param name="value"></param>
         /// <returns></returns>
         public static TResult GetSelfAndAutoFill<TResult>(TResult value) { throw new NotSupportedException("Can only be used in expressions"); }
+        public static DateTime GetDate() { throw new NotSupportedException("Can only be used in expressions"); }
         /// <summary>
         /// Subquery
         /// </summary>

Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/MethodCallExpressionResolve.cs

@@ -414,6 +414,8 @@ namespace SqlSugar
                 case "GetSelfAndAutoFill":
                     this.Context.Parameters.RemoveAll(it => it.ParameterName == model.Args[0].MemberName.ObjToString());
                     return this.Context.DbMehtods.GetSelfAndAutoFill(model.Args[0].MemberValue.ObjToString(), this.Context.IsSingle);
+                case "GetDate":
+                    return this.Context.DbMehtods.GetDate();
                 default:
                     break;
             }