SPI_saveplan copies a passed
statement (prepared by
into memory that will not be freed by
SPI_finish 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
SPI_freeplan on it to
avoid leaking memory until
In most cases,
preferred to this function, since it accomplishes largely the
same result without needing to physically copy the prepared
statement's data structures.
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