All fields should be treated as read-only by the driver, unless explicitly stated otherwise.
Figure 45-1. pdo_dbh_t
If, for whatever reason, your driver is not suitable to run persistently, you MUST check this flag in your SKEL_handle_factory() and raise an appropriate error.
If your database client library API simply returns pointers to its own internal buffers for you to copy after each fetch call, you should leave this value set to 0.
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