Provided by: postgresql-doc-10_10.3-1_all bug

NAME

       SPI_register_trigger_data - make ephemeral trigger data available in SPI queries

SYNOPSIS

       int SPI_register_trigger_data(TriggerData *tdata)

DESCRIPTION

       SPI_register_trigger_data makes any ephemeral relations captured by a trigger available to
       queries planned and executed through the current SPI connection. Currently, this means the
       transition tables captured by an AFTER trigger defined with a REFERENCING OLD/NEW TABLE AS
       ... clause. This function should be called by a PL trigger handler function after
       connecting.

ARGUMENTS

       TriggerData *tdata
           the TriggerData object passed to a trigger handler function as fcinfo->context

RETURN VALUE

       If the execution of the command was successful then the following (nonnegative) value will
       be returned:

       SPI_OK_TD_REGISTER
           if the captured trigger data (if any) has been successfully registered

       On error, one of the following negative values is returned:

       SPI_ERROR_ARGUMENT
           if tdata is NULL

       SPI_ERROR_UNCONNECTED
           if called from an unconnected procedure

       SPI_ERROR_REL_DUPLICATE
           if the name of any trigger data transient relation is already registered for this
           connection