Nhib.pdf code parsing-sqltypes

NHibernate-1.2.0.Beta3-debug

The classes under this directory encapsulate the database data types.

1. sqltype

All Database Data Types in nhib.pdf are encapsulated by sqltype or its subclass. Sqltype is actually a simple packaging of dbtype and Expansion
Show three attributes: length, scale, and precision. Function: dbtype is an enumeration, which is convenient after being encapsulated into a class.ProgramUse, and only one dbtype has no information
Fully, extends three attributes through the sqltype class.
2. binarysqltype, stringsqltype...
These classes inherited from sqltype have little effect, just to further define these types with length attributes.
3. sqltypefactory

Sqltype has little effect in nhib.pdf.
Sqltype is used when an idbparameter object is created and set in the driver class. Most drivers only use sqltype to obtain the dbtype attribute. Only sqlclientdriver uses the length, scale, and precision attributes.
Dialect is mainly used to generate dB Schema Based on entity attributes and configurations. sqltype is used in some methods of these classes.

in the XML Object configuration file, the column node has an SQL-type attribute, which is irrelevant to the sqltype class.
sqltype is only a representation class of the database data type. It is based on dbtype. It does not need to process data type conversion between different databases. This task is handled by the
ADO. Net
provider of various databases. For example, for the corresponding dbtype enumeration, MySQL has a mysqldbtype, And the mysqlparameter class has two attributes: dbtype and
mysqldbtype. If any of these attributes is set, the conversion is automatically completed and another attribute is set. This process can be viewed from mysql. Net
provider Source Code or reflector.