mysql connector 和 sqlserver ado.net 的区别

1，虽然同样是实现了IDataReader接口，但是 对于 

MySql.Data.MySqlClient.MySqlDataReader  和 System.Data.SqlClient.SqlDataReader

来说GetSchemaTable 方法的返回结果是不同的

以下是返回的datatable的结构

mysql	sqlserver
AllowDBNull	AllowDBNull
BaseCatalogName	BaseCatalogName
BaseColumnName	BaseColumnName
BaseSchemaName	BaseSchemaName
BaseTableName	BaseServerName
ColumnName	BaseTableName
ColumnOrdinal	ColumnName
ColumnSize	ColumnOrdinal
DataType	ColumnSize
IsAliased	DataType
IsAutoIncrement	DataTypeName
IsExpression	IsAliased
IsHidden	IsAutoIncrement
IsIdentity	IsColumnSet
IsKey	IsExpression
IsLong	IsHidden
IsReadOnly	IsIdentity
IsRowVersion	IsKey
IsUnique	IsLong
NumericPrecision	IsReadOnly
NumericScale	IsRowVersion
ProviderType	IsUnique
	NonVersionedProviderType
	NumericPrecision
	NumericScale
	ProviderSpecificDataType
	ProviderType
	UdtAssemblyQualifiedName
	XmlSchemaCollectionDatabase
	XmlSchemaCollectionName
	XmlSchemaCollectionOwningSchema