MDAC 2.5 SDK - OLE DB Programmer's Reference
OLE DB Interfaces

ICommandPrepare

This optional interface encapsulates command optimization, a separation of compile time and run time, as found in traditional relational database systems. The result of this optimization is a command execution plan.

If the provider supports command preparation, by supporting this interface, commands must be in a prepared state prior to calling the following methods:

• IColumnsInfo::GetColumnInfo
  
  
• IColumnsInfo::MapColumnIDs
  
  
• IColumnsRowset::GetAvailableColumns
  
  
• IColumnsRowset::GetColumnsRowset