Provided by: postgresql-doc-9.1_9.1.3-2_all bug

NAME

       SPI_returntuple - prepare to return a tuple as a Datum

SYNOPSIS

       HeapTupleHeader SPI_returntuple(HeapTuple row, TupleDesc rowdesc)

DESCRIPTION

       SPI_returntuple makes a copy of a row in the upper executor context, returning it in the
       form of a row type Datum. The returned pointer need only be converted to Datum via
       PointerGetDatum before returning.

       Note that this should be used for functions that are declared to return composite types.
       It is not used for triggers; use SPI_copytuple for returning a modified row in a trigger.

ARGUMENTS

       HeapTuple row
           row to be copied

       TupleDesc rowdesc
           descriptor for row (pass the same descriptor each time for most effective caching)

RETURN VALUE

       HeapTupleHeader pointing to copied row; NULL only if row or rowdesc is NULL