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It cannot perform any validation or processing on the connect or command strings. With ADO, you can specify that the DataFactory work in conjunction with another type of server program called a handler. The handler can modify client connect and command strings before they are used to access the data source. In addition, the handler can enforce access rights, which govern the ability of the client to read and write data to the data source. 44 DataFactory Customization DataFactory Customization 45 The parameters the handler uses to modify client parameters and access rights are specified in sections of a customization file.

You can create Connection objects independently of any other previously defined object. Note You can execute commands or stored procedures as if they were native methods on the Connection object. To execute a command, give the command a name using the Command object Name property. Set the Command object's ActiveConnection property to the connection. Then issue a statement where the command name is used as if it were a method on the Connection object, followed by any parameters, followed by a Recordset object if any rows are returned.

To support this feature, ADO provides a new Recordset object Name property. The restrictions are that you may not append columns to an existing Recordset, reshape a parameterized Recordset or the Recordset objects in any intervening COMPUTE clause, or perform aggregate operations on any Recordset other than the Recordset being reshaped. Grandchild Aggregates The chapter column created in a clause of a Shape command may be given chapter-alias name (typically with the AS keyword). You may identify any column, in any chapter, of the shaped Recordset with a fully qualified name identifying the child containing the column.

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ADO Programme's Reference

by Thomas

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