SPI_getvalue — return the string value of the specified column
char * SPI_getvalue(HeapTuplerow
, TupleDescrowdesc
, intcolnumber
)
SPI_getvalue
returns the string
representation of the value of the specified column.
The result is returned in memory allocated using palloc
. (You can use pfree
to release the memory when you don't need
it anymore.)
HeapTuple row
input row to be examined
TupleDesc rowdesc
input row description
int colnumber
column number (count starts at 1)
Column value, or NULL
if the column
is null, colnumber
is out
of range (SPI_result
is set to
SPI_ERROR_NOATTRIBUTE
), or no output
function is available (SPI_result
is
set to SPI_ERROR_NOOUTFUNC
).
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