Indicates the user preference as to when and how the provider should get the columns metadata.

Possible Values

データ型

string

デフォルト値

"OnStart"

解説

Available settings are the following:

• OnStart: The connector will execute the metadata calls to discover and cache all columns for every table, prior to executing the first statement.
• OnUse: The connector will execute the table specific metadata calls the first time the table is referenced, provided the metadata for the table is not already cached.