Migrator.Providers

Defines the implementations specific details for a particular database.

Subclasses register a typename for the given type code and maximum column length. $l in the type name will be replaced by the column length (if appropriate)

The typecode Maximum length of database type The database type name

Suclasses register a typename for the given type code. $l in the typename will be replaced by the column length (if appropriate).

The typecode The database type name

Get the name of the database type associated with the given

The DbType The database type name used by ddl.

Get the name of the database type associated with the given

The DbType The database type name used by ddl.

Get the name of the database type associated with the given

The DbType The database type name used by ddl.

Subclasses register which DbTypes are unsigned-compatible (ie, available in signed and unsigned variants)

Determine if a particular database type has an unsigned variant

The DbType True if the database type has an unsigned variant, otherwise false

Migration transformations provider for Microsoft SQL Server Compact Edition.

Migration transformations provider for Microsoft SQL Server.

Base class for every transformation providers. A 'tranformation' is an operation that modifies the database.

Add a new table

Table name Columns Adds the Test table with two columns:


            Database.AddTable("Test",
                              new Column("Id", typeof(int), ColumnProperty.PrimaryKey),
                              new Column("Title", typeof(string), 100)
                             );

Add a new table

Table name Columns the database storage engine to use Adds the Test table with two columns:


            Database.AddTable("Test", "INNODB",
                              new Column("Id", typeof(int), ColumnProperty.PrimaryKey),
                              new Column("Title", typeof(string), 100)
                             );

Add a new column to an existing table.

Table to which to add the column Column name Date type of the column Max length of the column Properties of the column, see ColumnProperty, Default value

AddColumn(string, string, Type, int, ColumnProperty, object)

Append a primary key to a table.

Constraint name Table name Primary column names

Guesses the name of the foreign key and add it

Append a foreign key (relation) between two tables. tables.

Constraint name Table name containing the primary key Primary key column name Foreign table name Foreign column name

AddForeignKey(string, string, string, string, string)

Determines if a constraint exists.

Constraint name Table owning the constraint true if the constraint exists.

Execute an SQL query returning results.

The SQL command. A data iterator, IDataReader.

Starts a transaction. Called by the migration mediator.

Rollback the current migration. Called by the migration mediator.

Commit the current transaction. Called by the migrations mediator.

Marks a Migration version number as having been applied

The version number of the migration that was applied

Marks a Migration version number as having been rolled back from the database

The version number of the migration that was removed

Returns the event logger

The list of Migrations currently applied to the database.

No Op (Null Object Pattern) implementation of the ITransformationProvider

This is basically a just a helper base class per-database implementors may want to override ColumnSql

The SQL type

The name of the column

the type of the column

Sql if This column is Indexed

Sql if this column has a default value

The sql for this column, override in database-specific implementation classes

This class maps a DbType to names.

Associations may be marked with a capacity. Calling the Get() method with a type and actual size n will return the associated name with smallest capacity >= n, if available and an unmarked default type otherwise. Eg, setting


            	Names.Put(DbType,			"TEXT" );
            	Names.Put(DbType,	255,	"VARCHAR($l)" );
            	Names.Put(DbType,	65534,	"LONGVARCHAR($l)" );

will give you back the following:


            	Names.Get(DbType)			// --> "TEXT" (default)
            	Names.Get(DbType,100)		// --> "VARCHAR(100)" (100 is in [0:255])
            	Names.Get(DbType,1000)	// --> "LONGVARCHAR(1000)" (100 is in [256:65534])
            	Names.Get(DbType,100000)	// --> "TEXT" (default)

On the other hand, simply putting


            	Names.Put(DbType, "VARCHAR($l)" );

would result in


            	Names.Get(DbType)			// --> "VARCHAR($l)" (will cause trouble)
            	Names.Get(DbType,100)		// --> "VARCHAR(100)" 
            	Names.Get(DbType,1000)	// --> "VARCHAR(1000)"
            	Names.Get(DbType,10000)	// --> "VARCHAR(10000)"

Get default type name for specified type

the type key the default type name associated with the specified key

Get the type name specified type and size

the type key the SQL length the SQL scale the SQL precision The associated name with smallest capacity >= size if available and the default type name otherwise

Set a type name for specified type key and capacity

the type key the (maximum) type size/length The associated name

Migration transformations provider for PostgreSql (using NPGSql .Net driver)

Summary description for MySqlTransformationProvider.

Summary description for SQLiteTransformationProvider.

Turn something like 'columnName INTEGER NOT NULL' into just 'columnName'

Name is the first value before the space.