# SPI_register_relation
SPI_register_relation — make an ephemeral named relation available by name in SPI queries
# Synopsis
int SPI_register_relation(EphemeralNamedRelation enr)
# Description
SPI_register_relation
makes an ephemeral named relation, with associated information, available to queries planned and executed through the current SPI connection.
# Arguments
EphemeralNamedRelation *
enr*
the ephemeral named relation registry entry
# Return Value
If the execution of the command was successful then the following (nonnegative) value will be returned:
SPI_OK_REL_REGISTER
if the relation has been successfully registered by name
On error, one of the following negative values is returned:
SPI_ERROR_ARGUMENT
if enr
is NULL
or its name
field is NULL
SPI_ERROR_UNCONNECTED
if called from an unconnected C function
SPI_ERROR_REL_DUPLICATE
if the name specified in the name
field of enr
is already registered for this connection