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Object-Oriented database design with the DatabaseObjects library

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31 Jan 20076 min read 110.4K   3.9K   64  
Demonstrates creating object-oriented database systems with the DatabaseObjects library.
Namespace SQL

    Public Class SQLBeginTransaction
        Inherits SQL.SQLStatement

        Public Overrides ReadOnly Property SQL() As String
            Get

                Select Case MyBase.ConnectionType
                    Case Database.ConnectionType.SQLServer
                        Return "BEGIN TRANSACTION"
                    Case Database.ConnectionType.MicrosoftAccess
                        Return "BEGIN TRANSACTION"
                    Case Database.ConnectionType.MySQL
                        Return "START TRANSACTION"
                End Select

            End Get
        End Property

    End Class


    Public Class SQLCommitTransaction
        Inherits SQL.SQLStatement

        Public Overrides ReadOnly Property SQL() As String
            Get

                Select Case MyBase.ConnectionType
                    Case Database.ConnectionType.SQLServer
                        Return "COMMIT TRANSACTION"
                    Case Database.ConnectionType.MicrosoftAccess
                        Return "COMMIT TRANSACTION"
                    Case Database.ConnectionType.MySQL
                        Return "COMMIT"
                End Select

            End Get
        End Property

    End Class


    Public Class SQLRollbackTransaction
        Inherits SQL.SQLStatement

        Public Overrides ReadOnly Property SQL() As String
            Get

                Select Case MyBase.ConnectionType
                    Case Database.ConnectionType.SQLServer
                        Return "ROLLBACK TRANSACTION"
                    Case Database.ConnectionType.MicrosoftAccess
                        Return "ROLLBACK TRANSACTION"
                    Case Database.ConnectionType.MySQL
                        Return "ROLLBACK"
                End Select

            End Get
        End Property

    End Class

End Namespace

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