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SPI_COPYTUPLE(3)        PostgreSQL 9.5.0 Documentation        SPI_COPYTUPLE(3)

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 9.5.0                     2016                     SPI_COPYTUPLE(3)