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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