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SPI_register_trigger_data
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SPI_register_trigger_data

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

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