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https://github.com/martinrybak/sqlclient

Native Microsoft SQL Server client for iOS
https://github.com/martinrybak/sqlclient

freetds ios microsoft-sql-server sql-server

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Native Microsoft SQL Server client for iOS

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SQLClient

=========



Native Microsoft SQL Server client for iOS. An Objective-C wrapper around the open-source [FreeTDS](https://github.com/FreeTDS/freetds/) library.



## Sample Usage




#import "SQLClient.h"



SQLClient* client = [SQLClient sharedInstance];

[client connect:@"server\instance:port" username:@"user" password:@"pass" database:@"db" completion:^(BOOL success) {

    if (success) {

      [client execute:@"SELECT * FROM Users" completion:^(NSArray* results) {

        for (NSArray* table in results) {

          for (NSDictionary* row in table) {

            for (NSString* column in row) {

              NSLog(@"%@=%@", column, row[column]);

            }

          }

        }             

        [client disconnect];

      }];

    }

}];




## Errors



FreeTDS communicates both errors and messages. `SQLClient` rebroadcasts both via `NSNotificationCenter`:



```

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(error:) name:SQLClientErrorNotification object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(message:) name:SQLClientMessageNotification object:nil];	



- (void)error:(NSNotification*)notification

{

	NSNumber* code = notification.userInfo[SQLClientCodeKey];

	NSString* message = notification.userInfo[SQLClientMessageKey];

	NSNumber* severity = notification.userInfo[SQLClientSeverityKey];

	NSLog(@"Error #%@: %@ (Severity %@)", code, message, severity);

}



- (void)message:(NSNotification*)notification

{

	NSString* message = notification.userInfo[SQLClientMessageKey];

	NSLog(@"Message: %@", message);

}

```



## Type Conversion

SQLClient maps SQL Server data types into the following native Objective-C types:



* bigint → NSNumber

* binary(n) → NSData

* bit → NSNumber

* char(n) → NSString

* cursor → **not supported**

* date → **NSDate** or **NSString**†

* datetime → NSDate

* datetime2 → **NSDate** or **NSString**†

* datetimeoffset → **NSDate** or **NSString**†

* decimal(p,s) → NSNumber

* float(n) → NSNumber

* image → **NSData**

* int → NSNumber

* money → NSDecimalNumber **(last 2 digits are truncated)**

* nchar → NSString

* ntext → NSString

* null → NSNull

* numeric(p,s) → NSNumber

* nvarchar → NSString

* nvarchar(max) → NSString

* real → NSNumber

* smalldatetime → NSDate

* smallint → NSNumber

* smallmoney → NSDecimalNumber

* sql_variant → **not supported**

* table → **not supported**

* text → NSString*

* time → **NSDate** or **NSString**†

* timestamp → NSData

* tinyint → NSNumber

* uniqueidentifier → NSUUID

* varbinary → NSData

* varbinary(max) → NSData

* varchar(max) → NSString*

* varchar(n) → NSString

* xml → NSString



\*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 are

`4.2`, `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.



* date

* datetime2

* datetimeoffset

* time



## 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:



* SQL Server 7.0 (TDS 7.0)

* SQL Server 2000 (TDS 7.1)

* SQL Server 2005 (TDS 7.2)

* SQL Server 2008 (TDS 7.3)

* **TODO: add more!**



To configure the connection for your server:



* In Xcode, go to `Edit Scheme...` and select the `Test` scheme.

* On the `Arguments` tab, uncheck `Use the Run action's arguments and environment variables`

* Add the following environment variables for your server. The values should be the same as you pass in to the `connect:` method.

	* `HOST` (`server\instance:port`)

	* `DATABASE` (optional)

	* `USERNAME`

	* `PASSWORD`



## Known Issues

PR's welcome!



* **strings**: FreeTDS incorrectly returns an empty string "" for a single space " "

* **money**: FreeTDS will truncate the rightmost 2 digits.

* OSX support: [FreeTDS-iOS](https://github.com/martinrybak/FreeTDS-iOS) needs to be compiled to support OSX and Podspec updated

* No support for stored procedures with out parameters (yet)

* No support for returning number of rows changed (yet)

* Swift bindings: I welcome a PR to make the API more Swift-friendly



##Demo Project

Open the Xcode project inside the **SQLClient** folder.



## Installation



### CocoaPods



CocoaPods is the preferred way to install this library.



1. Open a Terminal window. Update RubyGems by entering: `sudo gem update --system`. Enter your password when prompted.

2. Install CocoaPods by entering `sudo gem install cocoapods`.

3. Create a file at the root of your Xcode project folder called **Podfile**.

4. Enter the following text: `pod 'SQLClient', '~> 1.0.0'`

4. In Terminal navigate to this folder and enter `pod install`.

5. You will see a new **SQLClient.xcworkspace** file. Open this file in Xcode to work with this project from now on.



### Manual



1. Drag and drop the contents of the **SQLClient/SQLClient/SQLClient** folder into your Xcode project.

2. Select **Copy items into destination group's folder (if needed)**.

3. Go to Project > Build Phases > Link Binary With Libraries.

3. Click + and add **libiconv.dylib**.



## Documentation



SQLClient Class Reference



SQLClient: A Native Microsoft SQL Server Library for iOS



## Credits



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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