SPI_unregister_relation — remove an ephemeral named relation from the registry
int SPI_unregister_relation(const char *
SPI_unregister_relation removes an ephemeral named relation from the registry for the current connection.
const char *
the relation registry entry name
If the execution of the command was successful then the following (nonnegative) value will be returned:
if the tuplestore has been successfully removed from the registry
On error, one of the following negative values is returned:
if called from an unconnected C function
name is not found in the registry for the current connection
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