Полезная информация

SPI_getbinval

Name

SPI_getbinval -- Returns the binary value of the specified attribute

Synopsis

SPI_getbinval(tuple, tupdesc, fnumber, isnull)

Inputs

HeapTuple tuple

Input tuple to be examined

TupleDesc tupdesc

Input tuple description

int fnumber

Attribute number

Outputs

Datum

Attribute binary value

bool * isnull

flag for null value in attribute

SPI_result

SPI_ERROR_NOATTRIBUTE

Description

SPI_getbinval returns the specified attribute's value in internal form (as a Datum).

Usage

Attribute numbers are 1 based.

Algorithm

Does not allocate new space for the datum. In the case of a pass-by- reference data type, the Datum will be a pointer into the given tuple.