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Native Microsoft SQL Server client for iOS. An Objective-C wrapper around the open-source FreeTDS library.
How to install Oracle SQLPlus and Oracle Client in MAC OS. One thing you’ll notice in SQLPlus for the Mac is that this doesn’t work by default, if you hit the up key you’ll see a strange character sequence ^[[A rather than the previous command. All that aside, this article was on target with getting. First things first: I'm using MS SQL Server 2008 with a database at compatibility level 80, and connecting to it with.Net's System.Data.SqlClient.SqlConnection. For performance reasons I've created an indexed view. SQLPro for MSSQL is a lightweight Microsoft SQL Server database client, allowing quick and simple access to MSSQL Servers, including those hosted via cloud services such as SQL Azure or Amazon RDS.
Sample UsageErrors
FreeTDS communicates both errors and messages.
SQLClient rebroadcasts both via NSNotificationCenter :
Type Conversion
SQLClient maps SQL Server data types into the following native Objective-C types:
*The maximum length of a string in a query is configured on the server via the
SET TEXTSIZE command. To find out your current setting, execute SELECT @@TEXTSIZE . SQLClient uses 4096 by default. To override this setting, update the maxTextSize property.
†The following data types are only converted to NSDate on TDS version 7.3 and higher. By default FreeTDS uses version 7.1 of the TDS protocol, which converts them to NSString. To use a higher version of the TDS protocol, add an environment variable to Xcode named
TDSVER . Possible values are4.2 , 5.0 , 7.0 , 7.1 , 7.2 , 7.3 , 7.4 , auto .A value of auto tells FreeTDS to use an autodetection (trial-and-error) algorithm to choose the highest available protocol version.
Testing
The
SQLClientTests target contains integration tests which require a connection to an instance of SQL Server. The integration tests have passed successfully on the following database servers:
To configure the connection for your server:
Known Issues
PR's welcome!
##Demo ProjectOpen the Xcode project inside the SQLClient folder.
InstallationCocoaPods
CocoaPods is the preferred way to install this library.
Manual![]()
DocumentationCredits
FreeTDS:http://www.freetds.org
FreeTDS-iOS:https://github.com/patchhf/FreeTDS-iOS
FreeTDS example code in C:http://freetds.schemamania.org/userguide/samplecode.htm
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Active1 year, 5 months ago
First things first: I'm using MS SQL Server 2008 with a database at compatibility level 80, and connecting to it with .Net's
System.Data.SqlClient.SqlConnection .
For performance reasons I've created an indexed view. As a result, updates to tables referenced in the view need to be done with
ARITHABORT ON . However, the profiler shows that SqlClient is connecting with ARITHABORT OFF , so updates to those tables are failing.
Is there a central configuration setting to make SqlClient use Solomon Rutzky
ARITHABORT ON ? The best I've been able to find is to manually execute that each time a connection is opened, but updating the existing code base to do this would be a fairly large task so I'm keen to find a better way.
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Peter TaylorPeter Taylor
5 AnswersSeemingly preferred approach
I was under the impression that the following had been tested already by others, especially based on some of the comments. But my testing shows that these two methods do indeed work at the DB level, even when connecting via .NET
SqlClient . These have been tested and verified by others.
Server-wide
You can set the user options server configuration setting to be whatever it is currently bit-wise
OR ed with 64 (the value for ARITHABORT ). If you do not use the bit-wise OR (| ) but instead do a straight assignment (= ) then you will wipe out any other existing options already enabled.
Database-level
This can be set per-database via ALTER DATABASE SET:
Alternate approaches
The not-so-good news is that I have done a lot of searching on this topic, only to find that over the years a lot of others have done a lot of searching on this topic, and there is no way to configure the behavior of
SqlClient . Some MSDN documentation implies that it can be done via a ConnectionString, but there are no Keywords that would allow for altering these settings. Another document implies it can be changed via Client Network Configuration / Configuration Manager, but that does not seem possible either. Hence, and rather unfortunately, you will need to execute SET ARITHABORT ON; manually. Here are some ways to consider:
IF you are using Entity Framework 6 (or newer), you can try either:
Either of those will allow you to handle this in one spot without changing any existing code.
ELSE, you could create a wrapper method that does this, similar to:
and then just change the current
_Reader = _Command.ExecuteReader(); references to be _Reader = ExecuteReaderWithSetting(_Command); .
Doing this also allows for the setting to be handled in a single location while requiring only minimal and simplistic code changes that can be mostly done via Find & Replace.
Better yet (Else Part 2), since this is a connection level setting, it doesn't need to be executed per each SqlCommand.Execute__() call. So instead of creating a wrapper for
ExecuteReader() , create a wrapper for Connection.Open() :
And then just replace the existing
_Connection.Open(); references to be OpenAndSetArithAbort(_Connection); .
Both of the above ideas can be implemented in more OO style by creating a Class that extends either SqlCommand or SqlConnection.
Or Better yet (Else Part 3), you can create an event handler for the Connection StateChange and have it set the property when the connection changes from
Closed to Open as follows:
With that in place, you only need to add the following to each place where you create a
SqlConnection instance:
No changes to existing code are needed. I have just tried this method in a small console app, testing by printing the result of
SELECT SESSIONPROPERTY('ARITHABORT'); . It returns 1 , but if I disable the Event Handler, it returns 0 .
For the sake of completeness, here are some things that do not work (either at all or not as effectively):
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Option 1
Aside from Sankar's solution, setting the arithmetic abort setting at the server level for all connections will work:
As of SQL 2014 it's recommended to be on for all connections:
You should always set ARITHABORT to ON in your logon sessions. Setting ARITHABORT to OFF can negatively impact query optimization leading to performance issues.
So this would seem to be the ideal solution.
Option 2
If option 1 is not viable and you use stored procedures for most of your SQL calls (which you should, see Stored Procedures vs. Inline SQL) then simply enable the option in each relevant stored procedure:
I believe the best real solution here is to simply edit your code, as it's wrong and any other fix is merely a workaround.
Mqtt Paho Client Default For Cleansession
Community♦
LowlyDBALowlyDBA
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I am NOT an expert here but you can try something like below.
Ref: http://social.msdn.microsoft.com/Forums/en-US/transactsql/thread/d9e3e8ba-4948-4419-bb6b-dd5208bd7547/
jcolebrand♦
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Sankar ReddySankar Reddy
There is no setting to force SqlClient to always set ARITHABORT on, you have to set this as you describe.
Interestingly from the Microsoft documentation for SET ARITHABORT: -
You should always set ARITHABORT to ON in your logon sessions. Setting ARITHABORT to OFF can negatively impact query optimization leading to performance issues.
And yet the .Net connection is hard-coded to set this off by default?
Sql Server Client For Mac
As another point, you have to be very careful when diagnosing performance issues with this setting. Different set options will result in different query plans for the same query. Your .Net code could experience a performance issue (SET ARITHABORT OFF) and yet when you run the same TSQL query in SSMS (SET ARITHABORT ON by default) it could be fine. This is because the .Net query plan will not be reused and a new plan generated. This could potentially eliminate a parameter sniffing problem for example and give much better performance.
Andy JonesAndy Jones
If it saves anyone some time, in my case (Entity Framework Core 2.0.3, ASP.Net Core API, SQL Server 2008 R2):
An ad-hoc query from EF Core, with
SET ARITHABORT ON; at the top, does NOT work.
Sql Client Default For Mac Os
Finally, the solution that worked for me was: Combining a stored procedure, called as a raw query with the
SET option before EXEC separated by a semicolon, like this:
Sql For Mac
Chris AmelinckxChris Amelinckx
Mysql Client For MacNot the answer you're looking for? Browse other questions tagged sql-serversql-server-2008configurationcompatibility-levelado.net or ask your own question.Comments are closed.
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