PostgreSQL
Description
SPI_getbinval returns the value of the specified column in the internal form (as type Datum).
This function does not allocate new space for the datum. In the case of a pass-by-reference data type, the return value will be a pointer into the passed row.
Arguments
+HeapTuple +`+row+`-
input row to be examined
+TupleDesc +`+rowdesc+`-
input row description
+int +`+colnumber+`-
column number (count starts at 1)
+bool * +`+isnull+`-
flag for a null value in the column