http://dev.mysql.com/doc/connector-net/en/connector-net-connection-options.html
Table 7.1 Connector/Net Connection String Options - General
Name | Default | Description |
---|---|---|
Allow Batch , AllowBatch |
true | When true, multiple SQL statements can be sent with one command execution. Note: starting with MySQL 4.1.1, batch statements should be separated by the server-defined separator character. Statements sent to earlier versions of MySQL should be separated by ';'. |
Allow User Variables ,AllowUserVariables |
false |
Setting this to true indicates that the provider expects
user variables in the SQL. This option was added in Connector/Net version 5.2.2. |
Allow Zero Datetime ,AllowZeroDateTime |
false |
If set to True , MySqlDataReader.GetValue() returns
aMySqlDateTime object for date or datetime columns that
have disallowed values, such as zero datetime values, and aSystem.DateTime object
for valid values. If set to False (the default setting)
it causes a System.DateTime object to be returned for
all valid values and an exception to be thrown for disallowed values, such as zero datetime values. |
Auto Enlist , AutoEnlist |
true |
If AutoEnlist is set to true ,
which is the default, a connection opened using TransactionScope participates
in this scope, it commits when the scope commits and rolls back if TransactionScope does
not commit. However, this feature is considered security sensitive and therefore cannot be used in a medium trust environment. |
BlobAsUTF8ExcludePattern |
null | A POSIX-style regular expression that matches the names of BLOB columns that do not contain UTF-8 character data. SeeSection 6.16, “Character Set Considerations for Connector/Net” for usage details. |
BlobAsUTF8IncludePattern |
null | A POSIX-style regular expression that matches the names of BLOB columns containing UTF-8 character data. SeeSection 6.16, “Character Set Considerations for Connector/Net” for usage details. |
Certificate File ,CertificateFile |
null |
This option specifies the path to a certificate file in PKCS #12 format (.pfx ).
For an example of usage, see Section 5.7,
“Tutorial: Using SSL with MySQL Connector/Net”. Was introduced with 6.2.1. |
Certificate Password ,CertificatePassword |
null |
Specifies a password that is used in conjunction with a certificate specified using the option CertificateFile .
For an example of usage, see Section 5.7,
“Tutorial: Using SSL with MySQL Connector/Net”. Was introduced with 6.2.1. |
Certificate Store Location ,CertificateStoreLocation |
null | Enables you to access a certificate held in a personal store, rather than use a certificate file and password combination. For an example of usage, see Section 5.7, “Tutorial: Using SSL with MySQL Connector/Net”. Was introduced with 6.2.1. |
Certificate Thumbprint ,CertificateThumbprint |
null | Specifies a certificate thumbprint to ensure correct identification of a certificate contained within a personal store. For an example of usage, see Section 5.7, “Tutorial: Using SSL with MySQL Connector/Net”. Was introduced with 6.2.1. |
CharSet , Character
Set ,CharacterSet |
Specifies the character set that should be used to encode all queries sent to the server. Resultsets are still returned in the character set of the result data. | |
Check Parameters ,CheckParameters |
true | Indicates if stored routine parameters should be checked against the server. |
Command Interceptors ,CommandInterceptors |
The list of interceptors that can intercept SQL command operations. | |
Connect Timeout , Connection
Timeout , ConnectionTimeout |
15 | The length of time (in seconds) to wait for a connection to the server before terminating the attempt and generating an error. |
Connect_Attrs |
Passes a predefined set of key/value pairs containing connection-specific data items to the server, for application-defined purposes. connector/Net automatically transmits the following attributes: _pid , _client_version ,_platform , _program_name , _os , _os_details ,
and_thread . See Performance
Schema Connection Attribute Tables for the Performance
Schema tables to query on the server side to make use of these attributes. |
|
Convert Zero Datetime ,ConvertZeroDateTime |
false |
True to have MySqlDataReader.GetValue() andMySqlDataReader.GetDateTime() returnDateTime.MinValue for
date or datetime columns that have disallowed values. |
Default Command Timeout ,DefaultCommandTimeout |
30 | Sets the default value of the command timeout to be used. This does not supersede the individual command timeout property on an individual command object. If you set the command timeout property, that will be used. This option was added in Connector/Net 5.1.4 |
Default Table Cache Age ,DefaultTableCacheAge |
60 |
Specifies how long a TableDirect result should be cached,
in seconds. For usage information about table caching, seeSection 6.7,
“Using Connector/Net with Table Caching”. This option was added in Connector/Net 6.4. |
enableSessionExpireCallback |
false |
When set to true , causes the session-expiry scanner to
raise the session_end event before deleting the session
data stored in the my_aspnet_sessions table, when a session
times out. Enable this option to write additional application-specific cleanup code to handle thesession_end event
of the global.asax class, before the stored data of the
session gets deleted. Within the session_end method, any other required cleanup can be done. This option was added in Connector/Net 6.4.5; it is not yet available in Connector/Net 6.5.x releases. |
Encrypt , UseSSL |
false |
For Connector/Net 5.0.3 and later, when true , SSL encryption
is used for all data sent between the client and server if the server has a certificate installed. Recognized values are true , false , yes ,
and no . In versions before 5.0.3, this option had no effect.
From version 6.2.1, this option is deprecated and is replaced by SSL
Mode . The option still works if used. If this option is set to true, it is equivalent toSSL
Mode = Preferred . |
Exception Interceptors ,ExceptionInterceptors |
The list of interceptors that can triage thrownMySqlException exceptions. |
|
Functions Return String ,FunctionsReturnString |
false | Causes the connector to return binary/varbinary values as strings, if they do not have a tablename in the metadata. |
Host , Server , Data
Source ,DataSource , Address , Addr ,Network
Address |
localhost | The name or network address of the instance of MySQL to which to connect. Multiple hosts can be specified separated by commas. This can be useful where multiple MySQL servers are configured for replication and you are not concerned about the precise server you are connecting to. No attempt is made by the provider to synchronize writes to the database, so take care when using this option. In Unix environment with Mono, this can be a fully qualified path to a MySQL socket file. With this configuration, the Unix socket is used instead of the TCP/IP socket. Currently, only a single socket name can be given, so accessing MySQL in a replicated environment using Unix sockets is not currently supported. |
Ignore Prepare ,IgnorePrepare |
true |
When true, instructs the provider to ignore any calls toMySqlCommand.Prepare() .
This option is provided to prevent issues with corruption of the statements when used with server-side prepared statements. If you use server-side prepare statements, set this option to false. This option was added in Connector/Net 5.0.3 and Connector/Net
1.0.9. |
includesecurityasserts ,include
security asserts |
false |
Must be set to true when using theMySQLClientPermissions class
in a partial trust environment, with the library installed in the GAC of the hosting environment. This requirement is new for partial-trust applications in Connector/Net 6.6.4 and higher. SeeSection 6.19,
“Working with Partial Trust / Medium Trust” for details. |
Initial Catalog , Database |
mysql | The case-sensitive name of the database to use initially. |
Interactive , Interactive
Session , InteractiveSession |
false |
If set to true, the client is interactive. An interactive client is one where the server variable CLIENT_INTERACTIVE is
set. If an interactive client is set, the wait_timeout variable
is set to the value of interactive_timeout . The client
will then time out after this period of inactivity. For more details, see Server
System Variables in the MySQL Reference Manual. |
Integrated Security ,IntegratedSecurity |
no |
Use Windows authentication when connecting to server. By default, it is turned off. To enable, specify a value of yes .
(You can also use the value sspi as an alternative to yes .)
For details, see Section 6.5,
“Using the Windows Native Authentication Plugin”. This option was introduced in Connector/Net 6.4.4. |
Keep Alive , Keepalive |
0 | For TCP connections, idle connection time measured in seconds, before the first keepalive packet is sent. A value of 0 indicates that keepalive is not used. |
Logging |
false | When true, various pieces of information is output to any configured TraceListeners. See Section 6.14, “Using the MySQL Connector/Net Trace Source Object” for further details. |
Old Guids , OldGuids |
false |
This option was introduced in Connector/Net 6.1.1. The backend representation of a GUID type was changed fromBINARY(16) to CHAR(36) .
This was done to allow developers to use the server function UUID() to
populate a GUID table - UUID() generates a 36-character
string. Developers of older applications can add 'Old Guids=true' to
the connection string to use a GUID of data type BINARY(16) . |
Old Syntax , OldSyntax , Use
Old Syntax , UseOldSyntax |
false | This option was deprecated in Connector/Net 5.2.2. All code should now be written using the '@' symbol as the parameter marker. |
Password , pwd |
The password for the MySQL account being used. | |
Persist Security Info ,PersistSecurityInfo |
false |
When set to false or no (strongly
recommended), security-sensitive information, such as the password, is not returned as part of the connection if the connection is open or has ever been in an open state. Resetting the connection string resets all connection string values, including the password.
Recognized values are true , false , yes ,
and no . |
Pipe Name , Pipe , PipeName |
mysql |
When set to the name of a named pipe, theMySqlConnection attempts
to connect to MySQL on that named pipe. This setting only applies to the Windows platform. |
Port |
3306 | The port MySQL is using to listen for connections. This value is ignored if Unix socket is used. |
Procedure Cache Size ,ProcedureCacheSize ,procedure
cache ,procedurecache |
25 | Sets the size of the stored procedure cache. By default, Connector/Net stores the metadata (input/output data types) about the last 25 stored procedures used. To disable the stored procedure cache, set the value to zero (0). This option was added in Connector/Net 5.0.2 and Connector/Net 1.0.9. |
Protocol , Connection
Protocol , ConnectionProtocol |
socket |
Specifies the type of connection to make to the server. Values can be: socket or tcp for
a socket connection,pipe for a named pipe connection, unix for
a Unix socket connection, memory to use MySQL shared memory. |
Replication |
false | Indicates if this connection is to use replicated servers. |
Respect Binary Flags ,RespectBinaryFlags |
true |
Setting this option to false means that Connector/Net ignores
a column's binary flags as set by the server. This option was added in Connector/Net version 5.1.3. |
Shared Memory Name ,SharedMemoryName |
MYSQL |
The name of the shared memory object to use for communication if the connection protocol is set to memory . |
Sql Server Mode ,sqlservermode |
false |
Allow SQL Server syntax. When set to true , enables Connector/Net
to support square brackets around symbols instead of backticks. This enables Visual Studio wizards that bracket symbols with [] to work with Connector/Net. This option incurs a performance hit, so should only be used if necessary. This option was added in
version 6.3.1. |
SSL Mode , SslMode |
None |
This option has the following values:
This option was introduced in MySQL Connector/Net 6.2.1. |
Table Cache , tablecache ,tablecaching |
false |
Enables or disables caching of TableDirect commands. A
value of true enables the cache while false disables
it. For usage information about table caching, see Section 6.7,
“Using Connector/Net with Table Caching”. This option was added in Connector/Net 6.4. |
Treat BLOBs as UTF8 ,TreatBlobsAsUTF8 |
false | |
Treat Tiny As Boolean ,TreatTinyAsBoolean |
true |
Setting this value to false causes TINYINT(1) to
be treated as an INT .
See Numeric
Type Overview for a further explanation of the TINYINT and BOOL data
types. |
Use Affected Rows ,UseAffectedRows |
false |
When true , the connection reports changed rows instead
of found rows. This option was added in Connector/Net version 5.2.6. |
Use Procedure Bodies ,UseProcedureBodies ,procedure
bodies |
true |
When set to true , the default value, MySQL Connector/Net
expects the body of the procedure to be viewable. This enables it to determine the parameter types and order. Set the option to false when
the user connecting to the database does not have the SELECT privileges
for themysql.proc (stored procedures) table, or cannot
viewINFORMATION_SCHEMA.ROUTINES .
In this case, MySQL Connector/Net cannot determine the types and order of the parameters, and must be alerted to this fact by setting this option to false .
When set to false , MySQL Connector/Net does not rely on
this information being available when the procedure is called. Because MySQL Connector/Net will not be able to determine this information, explicitly set the types of all the parameters before the call and add the parameters to the command in the same order
as they appear in the procedure definition. This option was added in MySQL Connector/Net 5.0.4 and MySQL Connector/Net 1.0.10. |
User Id , UserID , Username ,Uid , User
name , User |
The MySQL login account being used. | |
Compress , Use
Compression ,UseCompression |
false |
Setting this option to Compression is used if both client and server support ZLIB compression, and the client has requested compression using this option. A compressed packet header is: packet length (3 bytes), packet number (1 byte), and Uncompressed Packet Length (3 bytes). The Uncompressed Packet Length is the number of bytes in the original, uncompressed packet. If this is zero, the data in this packet has not been compressed. When the compression protocol is in use, either the client or the server may compress packets. However, compression will not occur if the compressed length is greater than the original length. Thus, some packets will contain compressed data while other packets will not. |
Use Usage Advisor , Usage
Advisor , UseUsageAdvisor |
false | Logs inefficient database operations. |
Use Performance Monitor ,UsePerformanceMonitor ,userperfmon , perfmon |
false | Indicates that performance counters should be updated during execution. |
Connection Pooling Options
The following table lists the valid names for options related to connection pooling within the ConnectionString
.
For more information about connection pooling, see Section 6.4,
“Using Connector/Net with Connection Pooling”.
Table 7.2 Connector/Net Connection String Options - Connection Pooling
Name | Default | Description |
---|---|---|
Cache Server Properties ,CacheServerProperties |
false |
Specifies whether server variable settings are updated by a SHOW
VARIABLES command each time a pooled connection is returned. Enabling this setting speeds up connections in a connection pool environment. Your application is not informed of any changes to configuration variables made by other connections. This option
was added in Connector/Net 6.3. |
Connection Lifetime ,ConnectionLifeTime |
0 |
When a connection is returned to the pool, its creation time is compared with the current time, and the connection is destroyed if that time span (in seconds) exceeds the value specified by Connection
Lifetime . This is useful in clustered configurations to force load balancing between a running server and a server just brought online. A value of zero (0) causes pooled connections to have the maximum connection timeout. |
Connection Reset ,ConnectionReset |
false | If true, the connection state is reset when it is retrieved from the pool. The default value of false avoids making an additional server round trip when obtaining a connection, but the connection state is not reset. |
Maximum Pool Size , Max
Pool Size ,MaximumPoolsize ,maxpoolsize (only
for Connector/Net 6.7 and later) |
100 | The maximum number of connections allowed in the pool. |
Minimum Pool Size , Min
Pool Size ,MinimumPoolSize ,minpoolsize (only
for Connector/Net 6.7 and later) |
0 | The minimum number of connections allowed in the pool. |
Pooling |
true |
When true , the MySqlConnection object
is drawn from the appropriate pool, or if necessary, is created and added to the appropriate pool. Recognized values are true , false , yes ,
and no . |
http://dev.mysql.com/doc/refman/5.0/es/connector-net-examples-mysqlconnection.html#connector-net-examples-mysqlconnection-connectionstring
The following table lists the valid names for keyword values within the ConnectionString
.
Name | Default | Description |
Connect Timeout ,Connection
Timeout |
15 | The length of time (in seconds) to wait for a connection to the server before terminating the attempt and generating an error. |
Host ,Server ,Data
Source ,DataSource ,Address ,Addr ,Network
Address |
localhost | The name or network address of the instance of MySQL to which to connect. Multiple hosts can be specified separated by &. This can be useful where multiple MySQL servers are configured for replication and you are not concerned about the precise server you are connecting to. No attempt is made by the provider to synchronize writes to the database so care should be taken when using this option. In Unix environment with Mono, this can be a fully qualified path to MySQL socket filename. With this configuration, the Unix socket will be used instead of TCP/IP socket. Currently only a single socket name can be given so accessing MySQL in a replicated environment using Unix sockets is not currently supported. |
Ignore Prepare |
true | When true, instructs the provider to ignore any calls to MySqlCommand.Prepare(). This option is provided to prevent issues with corruption of the statements when use with server side prepared statements. If you want to use server-side prepare statements, set this option to false. This option was added in Connector/NET 5.0.3. |
Port |
3306 | The port MySQL is using to listen for connections. Specify -1 for this value to use a named pipe connection (Windows only). This value is ignored if Unix socket is used. |
Protocol |
socket | Specifies the type of connection to make to the server.Values can be: socket or tcp for a socket connection pipe for a named pipe connection unix for a Unix socket connection memory to use MySQL shared memory |
CharSet ,Character
Set |
Specifies the character set that should be used to encode all queries sent to the server. Resultsets are still returned in the character set of the data returned. | |
Logging |
false | When true, various pieces of information is output to any configured TraceListeners. |
Allow Batch |
true | When true, multiple SQL statements can be sent with one command execution. -Note- Starting with MySQL 4.1.1, batch statements should be separated by the server-defined seperator character. Commands sent to earlier versions of MySQL should be seperated with ';'. |
Encrypt |
false |
For Connector/NET 5.0.3 and later, when true , SSL encryption
is used for all data sent between the client and server if the server has a certificate installed. Recognized values are true , false , yes ,
and no . In versions before 5.0.3, this option had no effect. |
Initial Catalog ,Database |
mysql | The name of the database to use intially |
Password ,pwd |
The password for the MySQL account being used. | |
Persist Security Info |
false |
When set to false or no (strongly
recommended), security-sensitive information, such as the password, is not returned as part of the connection if the connection is open or has ever been in an open state. Resetting the connection string resets all connection string values including the password.
Recognized values are true ,false , yes ,
and no . |
User Id ,Username ,Uid , User
name |
The MySQL login account being used. | |
Shared Memory Name |
MYSQL | The name of the shared memory object to use for communication if the connection protocol is set to memory. |
Allow Zero Datetime |
false |
True to have MySqlDataReader.GetValue() return a MySqlDateTime for date or datetime columns that have illegal values. False will cause a System.DateTime object
to be returned for legal values and an exception will be thrown for illegal values. |
Convert Zero Datetime |
false |
True to have MySqlDataReader.GetValue() andMySqlDataReader.GetDateTime() return
DateTime.MinValue for date or datetime columns that have illegal values. |
Old Syntax ,OldSyntax |
false |
Allows use of '@' symbol as a parameter marker. See MySqlCommand for
more info. This is for compatibility only. All future code should be written to use the new '?' parameter marker. |
Pipe Name ,Pipe |
mysql |
When set to the name of a named pipe, the MySqlConnection will
attempt to connect to MySQL on that named pipe.This settings only applies to the Windows platform. |
The following table lists the valid names for connection pooling values within the ConnectionString
.
For more information about connection pooling, see Connection Pooling for the MySql Data Provider.
Name | Default | Description |
Connection Lifetime |
0 |
When a connection is returned to the pool, its creation time is compared with the current time, and the connection is destroyed if that time span (in seconds) exceeds the value specified byConnection
Lifetime . This is useful in clustered configurations to force load balancing between a running server and a server just brought online. A value of zero (0) causes pooled connections to have the maximum connection timeout. |
Max Pool Size |
100 | The maximum number of connections allowed in the pool. |
Min Pool Size |
0 | The minimum number of connections allowed in the pool. |
Pooling |
true |
When true , the MySqlConnection object
is drawn from the appropriate pool, or if necessary, is created and added to the appropriate pool. Recognized values are true , false , yes ,
andno . |
Reset Pooled Connections ,ResetConnections ,ResetPooledConnections |
true | Specifies whether a ping and a reset should be sent to the server before a pooled connection is returned. Not resetting will yeild faster connection opens but also will not clear out session items such as temp tables. |
Cache Server Configuration ,CacheServerConfiguration ,CacheServerConfig |
false | Specifies whether server variables should be updated when a pooled connection is returned. Turning this one will yeild faster opens but will also not catch any server changes made by other connections. |
When setting keyword or connection pooling values that require a Boolean value, you can use 'yes' instead of 'true', and 'no' instead of 'false'.
Note
The MySql Data Provider uses the native
socket protocol to communicate with MySQL. Therefore, it does not support the use of an ODBC data source name (DSN) when connecting to MySQL because it does not add an ODBC layer.
CAUTION
In this release, the application
should use caution when constructing a connection string based on user input (for example when retrieving user ID and password information from a dialog box, and appending it to the connection string). The application should ensure that a user cannot embed
extra connection string parameters in these values (for example, entering a password as "validpassword;database=somedb" in an attempt to attach to a different database).
Examples
The following example creates a MySqlConnection
and
sets some of its properties
Visual Basic example:
Public Sub CreateConnection() Dim myConnection As New MySqlConnection() myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass" myConnection.Open() End Sub 'CreateConnection
C# example:
public void CreateConnection() { MySqlConnection myConnection = new MySqlConnection(); myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass"; myConnection.Open(); }
User Comments
Not sure what the deal is, but on Linux (Fedora 14) running Mono/.NET, by default LINQ queries have square brackets around field names, which of course breaks any LINQ query.
The documentation says that "Sql Server Mode" is false by default & that this will prevent square brackets from being used (instead of backtics); the opposite is actually true, wtf ;-)
Solution on my end is to set "Sql Server Mode" to true in my connection string params.
Using connector 6.3.6