SPI_getvalue
SPI_getvalue — return the string value of the specified column
Synopsis
char * SPI_getvalue(HeapTuplerow
, TupleDescrowdesc
, intcolnumber
)
Description
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.)
Arguments
-
HeapTuple
row
-
input row to be examined
-
TupleDesc
rowdesc
-
input row description
-
int
colnumber
-
column number (count starts at 1)
Return Value
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
).