1SPI_RETURNTUPLE(3)       PostgreSQL 10.7 Documentation      SPI_RETURNTUPLE(3)
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NAME

6       SPI_returntuple - prepare to return a tuple as a Datum
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SYNOPSIS

9       HeapTupleHeader SPI_returntuple(HeapTuple row, TupleDesc rowdesc)
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DESCRIPTION

12       SPI_returntuple makes a copy of a row in the upper executor context,
13       returning it in the form of a row type Datum. The returned pointer need
14       only be converted to Datum via PointerGetDatum before returning.
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16       This function can only be used while connected to SPI. Otherwise, it
17       returns NULL and sets SPI_result to SPI_ERROR_UNCONNECTED.
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19       Note that this should be used for functions that are declared to return
20       composite types. It is not used for triggers; use SPI_copytuple for
21       returning a modified row in a trigger.
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ARGUMENTS

24       HeapTuple row
25           row to be copied
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27       TupleDesc rowdesc
28           descriptor for row (pass the same descriptor each time for most
29           effective caching)
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RETURN VALUE

32       HeapTupleHeader pointing to copied row, or NULL on error (see
33       SPI_result for an error indication)
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37PostgreSQL 10.7                      2019                   SPI_RETURNTUPLE(3)
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