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
).