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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

Method	Description
Prepare	Validates and optimizes the current command.
Unprepare	Discards the current command execution plan.

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Microsoft OLE DB

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