Synchronization code

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

@@ -1064,5 +1064,10 @@ namespace SqlSugar
             var parameterNameA = mode.Args[0].MemberName; 
             return $" CEILING({parameterNameA}) ";
         }
+        public virtual string NewUid(MethodCallExpressionModel mode)
+        {
+            return $" uuid_generate_v4() ";
+        }
+
     }
 }

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

@@ -120,6 +120,7 @@ namespace SqlSugar
         string Right(MethodCallExpressionModel mode);
         string PadLeft(MethodCallExpressionModel mode);
         string Floor(MethodCallExpressionModel mode);
-        string Ceil(MethodCallExpressionModel mode);
+        string Ceil(MethodCallExpressionModel mode); 
+        string NewUid(MethodCallExpressionModel mode);
     }
 }

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

@@ -303,6 +303,7 @@ namespace SqlSugar
         public static string ToVarchar(object value) { return value.ObjToString(); }
         public static decimal ToDecimal(object value) { return value.ObjToDecimal(); }
         public static Guid ToGuid(object value) { return Guid.Parse(value.ObjToString()); }
+        public static Guid NewUid() { throw new NotSupportedException("Can only be used in expressions"); }
         public static double ToDouble(object value) { return value.ObjToMoney(); }
         public static bool ToBool(object value) { return value.ObjToBool(); }
         public static string Substring(object value, int index, int length) { return value.ObjToString().Substring(index, length); }

Src/Asp.Net/SqlSugar/Realization/Dm/SqlBuilder/DmExpressionContext.cs

@@ -259,5 +259,10 @@ namespace SqlSugar
             var parameterNameA = mode.Args[0].MemberName;
             return $" CEIL({parameterNameA}) ";
         }
+
+        public override string NewUid(MethodCallExpressionModel mode)
+        {
+            return "  SYS_GUID() ";
+        }
     }
 }

Src/Asp.Net/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpQueryBuilder.cs

@@ -37,6 +37,11 @@ namespace SqlSugar
         {
             base.AppendFilter();
             string oldOrderValue = this.OrderByValue;
+            var isNullOrderValue = Skip == 0 && Take == 1 && oldOrderValue == "ORDER BY NOW() ";
+            if (isNullOrderValue)
+            {
+                this.OrderByValue = null;
+            }
             string result = null;
             sql = new StringBuilder();
             sql.AppendFormat(SqlTemplate, GetSelectValue, GetTableNameString, GetWhereValueString, GetGroupByString + HavingInfos, (Skip != null || Take != null) ? null : GetOrderByString);
@@ -61,6 +66,19 @@ namespace SqlSugar
                 result = sql.ToString();
             }
             this.OrderByValue = oldOrderValue;
+            result = GetSqlQuerySql(result);
+            if (result.IndexOf("-- No table") > 0)
+            {
+                return "-- No table";
+            }
+            if (TranLock != null)
+            {
+                result = result + TranLock;
+            }
+            if (result.Contains("uuid_generate_v4()"))
+            {
+                result = " CREATE EXTENSION IF NOT EXISTS pgcrypto;CREATE EXTENSION IF NOT EXISTS \"uuid-ossp\"; " + result;
+            }
             return result;
         }
 

Src/Asp.Net/SqlSugar/Realization/MySql/SqlBuilder/MySqlExpressionContext.cs

@@ -245,6 +245,10 @@ namespace SqlSugar
                 return $" JSON_CONTAINS({model.Args[0].MemberName},'{{\"{model.Args[1].MemberValue}\":\"{model.Args[2].MemberValue.ObjToStringNoTrim().ToSqlFilter()}\"}}')";
             }
         }
+        public override string NewUid(MethodCallExpressionModel mode)
+        {
+            return "    CONCAT(\r\n        LPAD(UPPER(HEX(FLOOR(UUID_SHORT() / 0x100000000))), 8, '0'),\r\n        '-',\r\n        LPAD(UPPER(HEX(FLOOR(UUID_SHORT() / 0x10000) & 0xFFFF)), 4, '0'),\r\n        '-',\r\n        LPAD(UPPER(HEX(FLOOR(UUID_SHORT() / 0x100) & 0xFFFF)), 4, '0'),\r\n        '-',\r\n        LPAD(UPPER(HEX(UUID_SHORT() & 0xFF)), 4, '0'),\r\n        '-000000000000'\r\n    )  ";
+        }
         //public override string TrimEnd(MethodCallExpressionModel mode)
         //{
         //    var parameterNameA = mode.Args[0].MemberName;

Src/Asp.Net/SqlSugar/Realization/Oracle/SqlBuilder/OracleExpressionContext.cs

@@ -385,5 +385,10 @@ namespace SqlSugar
             var parameterNameA = mode.Args[0].MemberName;
             return $" CEIL({parameterNameA}) ";
         }
+
+        public override string NewUid(MethodCallExpressionModel mode)
+        {
+            return "  SYS_GUID() ";
+        }
     }
 }

Src/Asp.Net/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLQueryBuilder.cs

@@ -86,6 +86,10 @@ namespace SqlSugar
             {
                 result = result + TranLock;
             }
+            if (result.Contains("uuid_generate_v4()")) 
+            {
+                result=" CREATE EXTENSION IF NOT EXISTS pgcrypto;CREATE EXTENSION IF NOT EXISTS \"uuid-ossp\"; "+ result;
+            }
             return result;
         }
 

Src/Asp.Net/SqlSugar/Realization/SqlServer/SqlBuilder/SqlServerExpressionContext.cs

@@ -130,6 +130,11 @@ namespace SqlSugar
             var parameterNameC = mode.Args[2].MemberName;
             return $" CONCAT(REPLICATE({parameterNameC}, {parameterNameB} - LEN({parameterNameA})), {parameterNameA})  ";
         }
+
+        public override string NewUid(MethodCallExpressionModel mode)
+        {
+            return " NEWID() ";
+        }
     }
 
 

Src/Asp.Net/SqlSugar/Realization/Sqlite/SqlBuilder/SqliteExpressionContext.cs

@@ -319,5 +319,10 @@ namespace SqlSugar
             var parameterNameB = mode.Args[1].MemberName;
             return $" SUBSTR({parameterNameA}, -2, {parameterNameB})  ";
         }
+
+        public override string NewUid(MethodCallExpressionModel mode)
+        {
+            return " substr(upper(hex(randomblob(4))), 1, 8) || '-' ||\r\n    substr(upper(hex(randomblob(2))), 1, 4) || '-' ||\r\n    '4' || substr(upper(hex(randomblob(2))), 2, 3) || '-' ||\r\n    substr('89ab', 1 + (abs(random()) % 4), 1) || substr(upper(hex(randomblob(2))), 2, 3) || '-' ||\r\n    substr(upper(hex(randomblob(6))), 1, 12) ";
+        }
     }
 }