SPI_connect opens a connection
from a procedure invocation to the SPI manager. You must call
this function if you will need to execute queries. Some utility
SPI functions may be called from un-connected procedures.
If your procedure is already connected,
SPI_connect will return an SPI_ERROR_CONNECT error. Note that this may
happen if a procedure which has called
SPI_connect directly calls another procedure
which itself calls
While recursive calls to the SPI manager are permitted when an
SPI query invokes another
function which uses SPI,
directly nested calls to
SPI_finish are forbidden.
SPI_connect performs the
following: Initializes the SPI internal structures for query
execution and memory management.
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