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
HeapTuplerowinput row to be examined
TupleDescrowdescinput row description
intcolnumbercolumn 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).