Provided by: postgresql-doc-9.5_9.5.25-0ubuntu0.16.04.1_all 

NAME
SPI_copytuple - make a copy of a row in the upper executor context
SYNOPSIS
HeapTuple SPI_copytuple(HeapTuple row)
DESCRIPTION
SPI_copytuple makes a copy of a row in the upper executor context. This is normally used to return a
modified row from a trigger. In a function declared to return a composite type, use SPI_returntuple
instead.
ARGUMENTS
HeapTuple row
row to be copied
RETURN VALUE
the copied row; NULL only if tuple is NULL
PostgreSQL 9.5.25 2021 SPI_COPYTUPLE(3)