copies a passed statement (prepared by
) into memory that will not be freed
nor by the transaction manager,
and returns a pointer to the copied statement. This gives you the
ability to reuse prepared statements in the subsequent invocations of
your procedure in the current session.
Pointer to the copied statement; or NULL if unsuccessful. On error, SPI_result is set thus:
if plan is NULL or invalid
if called from an unconnected procedure
The originally passed-in statement is not freed, so you might wish to do
on it to avoid leaking memory
In most cases,
is preferred to this
function, since it accomplishes largely the same result without needing
to physically copy the prepared statement's data structures.