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SPI_connect — Connects your procedure to the SPI manager.
int SPI_connect(void)
Inputs
None
Outputs
int
Return status
SPI_OK_CONNECT
if connected
SPI_ERROR_CONNECT
if not connected
Description
SPI_connect opens a connection to the Postgres backend.
You should call this function if you will need to execute queries. Some
utility SPI functions may be called from un-connected procedures.
You may get SPI_ERROR_CONNECT error if SPI_connect is
called from an already connected procedure - e.g. if you directly call one
procedure from another connected one. Actually, while the child procedure
will be able to use SPI, your parent procedure will not be able to continue
to use SPI after the child returns (if SPI_finish is called by the child).
It's bad practice.
Usage
Algorithm
SPI_connect performs the following:
•
Initializes the SPI internal
structures for query execution and memory management.
