Provided by: postgresql-doc-9.1_9.1.3-2_all bug

NAME

       SPI_saveplan - save a plan

SYNOPSIS

       SPIPlanPtr SPI_saveplan(SPIPlanPtr plan)

DESCRIPTION

       SPI_saveplan saves a passed plan (prepared by SPI_prepare) in memory that will not be
       freed by SPI_finish nor by the transaction manager, and returns a pointer to the saved
       plan. This gives you the ability to reuse prepared plans in the subsequent invocations of
       your procedure in the current session.

ARGUMENTS

       SPIPlanPtr plan
           the plan to be saved

RETURN VALUE

       Pointer to the saved plan; NULL if unsuccessful. On error, SPI_result is set thus:

       SPI_ERROR_ARGUMENT
           if plan is NULL or invalid

       SPI_ERROR_UNCONNECTED
           if called from an unconnected procedure

NOTES

       The passed-in plan is not freed, so you might wish to do SPI_freeplan on it to avoid
       leaking memory until SPI_finish.

       If one of the objects (a table, function, etc.) referenced by the prepared plan is dropped
       or redefined, then future executions of SPI_execute_plan may fail or return different
       results than the plan initially indicates.