rowversion

SQL server ROWVERSION definition is not accurate?

由 北城余情 提交于 2019-12-08 01:01:49
问题 From msdn Each database has a counter that is incremented for each insert or update operation that is performed on a table that contains a rowversion column within the database . Also To return the current rowversion value for a database, use @@DBTS. I have a database ( believe me it has just one table and no timestamp / rowversion fields) But When I run select @@DBTS , I get a result as if I had a rowversion column : (p.s. - inserting / updating - doesn't update this value) . What is this

Can't get Dapper to handle SQL RowVersion properly

由 与世无争的帅哥 提交于 2019-12-07 20:17:26
I've got a rowversion column added to my database and I'm trying to get Dapper mapping to populate it properly on my object. My object has... public byte[] RowVersion { get; set; } And I have included the RowVersion column in my query but when I do a Query.. conn.Query<MyObject, AnotherObject, AnAdditionalObject>(... The MyObject that I get passed to me has a null for the RowVersion property. If I do a Dapper Query() without any type then the dynamic I get back has the expected RowVersion on it with the correct value. Has anyone had this working and if so what am I doing wrong? I was able to

SQL server ROWVERSION definition is not accurate?

由 天大地大妈咪最大 提交于 2019-12-06 13:34:26
From msdn Each database has a counter that is incremented for each insert or update operation that is performed on a table that contains a rowversion column within the database . Also To return the current rowversion value for a database, use @@DBTS. I have a database ( believe me it has just one table and no timestamp / rowversion fields) But When I run select @@DBTS , I get a result as if I had a rowversion column : (p.s. - inserting / updating - doesn't update this value) . What is this value ? Why Do I have it without having rowversion column ? What is this value ? It's the value of the

Rowversion comparison in Entity Framework

由 ╄→гoц情女王★ 提交于 2019-12-04 19:32:56
问题 How should I compare rowversion fields using Entity Framework? I have one table which has a rowversion column, I want to get data from tables for which the row version is higher than specified value. byte[] rowversion = ... some value; _context.Set<T>().Where(item => item.RowVersion > rowVersion); This line does not work, it throws the error: Operator '>' cannot be applied to operands of type 'byte[]' and 'byte[]' Any idea how I can compare rowversion fields in C#/Entity Framework? 回答1: Here

SQL Server RowVersion/Timestamp - Comparisons

由 怎甘沉沦 提交于 2019-11-30 04:35:34
I know that the value itself for a RowVersion column is not in and of itself useful, except that it changes each time the row is updated. However, I was wondering if they are useful for relative (inequality) comparison. If I have a table with a RowVersion column, are either of the following true: Will all updates that occur simultaneously (either same update statement or same transaction) have the same value in the RowVersion column? If I do update "A", followed by update "B", will the rows involved in update "B" have a higher value than the rows involved in update "A"? Thanks. From MSDN :

MVC3 - posting byte array to a controller - Database RowVersion

由 浪子不回头ぞ 提交于 2019-11-29 10:53:54
问题 I am working on an MVC3 application. My client side ViewModel contains a SQL Server RowVersion property, which is a byte[]. It is rendered as an Object array on the client side. When I attempt to post my view model to a controller, the RowVersion property is always null. I am assuming that the Controller serializer (JsonValueProviderFactory) is ignoring the Object array property. I have seen this blog, however this does not apply, as I am posting JSON and not the form markup: http:/

converting sql server rowversion to long or ulong?

由 谁都会走 提交于 2019-11-29 09:43:21
What is the proper type for the rowversion (timestamp) data type? I know it is 8 bytes but i cannot find a link in MSDN which tell if it is a signed or unsigned long. which code should I use, does it even matter? byte[] SqlTimeStamp; long longConversion; longConversion = BitConverter.ToInt64(SqlTimeStamp,0); TimeStamp = BitConverter.GetBytes(longConversion); ulong ulongConversion; ulongConversion = BitConverter.ToUInt64(SqlTimeStamp,0); TimeStamp = BitConverter.GetBytes(ulongConversion); Adriano Repetti Short answer: it doesn't matter but I'd choose UInt64 . Details: semantically it's

SQL Server RowVersion/Timestamp - Comparisons

由 邮差的信 提交于 2019-11-29 01:45:00
问题 I know that the value itself for a RowVersion column is not in and of itself useful, except that it changes each time the row is updated. However, I was wondering if they are useful for relative (inequality) comparison. If I have a table with a RowVersion column, are either of the following true: Will all updates that occur simultaneously (either same update statement or same transaction) have the same value in the RowVersion column? If I do update "A", followed by update "B", will the rows

converting sql server rowversion to long or ulong?

由 二次信任 提交于 2019-11-28 02:58:29
问题 What is the proper type for the rowversion (timestamp) data type? I know it is 8 bytes but i cannot find a link in MSDN which tell if it is a signed or unsigned long. which code should I use, does it even matter? byte[] SqlTimeStamp; long longConversion; longConversion = BitConverter.ToInt64(SqlTimeStamp,0); TimeStamp = BitConverter.GetBytes(longConversion); ulong ulongConversion; ulongConversion = BitConverter.ToUInt64(SqlTimeStamp,0); TimeStamp = BitConverter.GetBytes(ulongConversion); 回答1:

How to query Code First entities based on rowversion/timestamp value?

由 霸气de小男生 提交于 2019-11-27 13:55:09
问题 I've run into a case where something that worked fairly well with LINQ to SQL seems to be very obtuse (or maybe impossible) with the Entity Framework. Specifically, I've got an entity that includes a rowversion property (both for versioning and concurrency control). Something like: public class Foo { [Key] [MaxLength(50)] public string FooId { get; set; } [Timestamp] [ConcurrencyCheck] public byte[] Version { get; set; } } I would like to be able to take a entity as input, and find all of the
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