Update unit test

Src/Asp.NetCore2/SqlSugar/Realization/Sqlite/DbMaintenance/SqliteDbMaintenance.cs

@@ -337,7 +337,9 @@ namespace SqlSugar
                         DbColumnName = dataReader.GetString(1),
                         DefaultValue = dataReader.GetValue(4).ObjToString(),
                         IsPrimarykey = dataReader.GetBoolean(5).ObjToBool(),
-                        Length = length
+                        Length = length,
+                        DecimalDigits=decimalDigits,
+                        Scale= decimalDigits
                     };
                     result.Add(column);
                 }

Src/Asp.NetCore2/SqliteTest/UnitTest/UCodeFirst.cs

@@ -18,16 +18,24 @@ namespace OrmTest
             Db.Insertable(new Test00111()).ExecuteCommand();
             var list = Db.Queryable<Test00111>().ToList();
             Db.CodeFirst.InitTables<Test00111121>();
-            Db.CodeFirst.InitTables<UnitByteArray>();
+            Db.CodeFirst.InitTables<UnitByteArray1>();
-            Db.Insertable(new UnitByteArray()
+            Db.Insertable(new UnitByteArray1()
             {
                 Data = new byte[] { 1, 2, 123, 31, 1 }
             }).ExecuteCommand();
-            var list2=Db.Queryable<UnitByteArray>().ToDataTable();
+            var list2=Db.Queryable<UnitByteArray1>().ToDataTable();
+            var x=Db.DbMaintenance.GetColumnInfosByTableName("`UnitByteArray1`", false);
+            if (x[0].Length != 18 && x[0].Scale != 0) throw new Exception("unit test error");
+            if (x[1].Length != 18 && x[1].Scale != 2) throw new Exception("unit test error");
+            if (x[2].Length != 0 && x[2].Scale != 0) throw new Exception("unit test error");
         }
 
-        public class UnitByteArray 
+        public class UnitByteArray1 
         {
+            [SugarColumn(IsNullable = true, ColumnDataType = "varchar(18)")]
+            public string Aa { get; set; }
+            [SugarColumn(IsNullable =true, ColumnDataType = "decimal(18,2)")]
+            public decimal A { get; set; }
             public byte[] Data { get; set; }    
         }
         public class Test00111121