/*
* Construct a leaf tuple containing the given heap TID and datum value
*/
SpGistLeafTuple
spgFormLeafTuple(SpGistState *state, ItemPointer heapPtr,
Datum datum, bool isnull)
{
SpGistLeafTuple tup;
unsigned int size;
/* compute space needed (note result is already maxaligned) */
size = SGLTHDRSZ;
if (!isnull)
size += SpGistGetTypeSize(&state->attType, datum);
/*
* Ensure that we can replace the tuple with a dead tuple later. This
* test is unnecessary when !isnull, but let's be safe.
*/
if (size < SGDTSIZE)
size = SGDTSIZE;
/* OK, form the tuple */
tup = (SpGistLeafTuple) palloc0(size);
tup->size = size;
tup->nextOffset = InvalidOffsetNumber;
tup->heapPtr = *heapPtr;
if (!isnull)
memcpyDatum(SGLTDATAPTR(tup), &state->attType, datum);
return tup;
}
SpGistLeafTuple
spgFormLeafTuple(SpGistState *state, ItemPointer heapPtr, Datum datum)
{
SpGistLeafTuple tup;
unsigned int size = SGLTHDRSZ + getTypeLength(&state->attType, datum);
Assert(size < 0xffff);
tup = palloc0(size);
tup->heapPtr = *heapPtr;
tup->nextOffset = InvalidOffsetNumber;
tup->size = size;
memcpyDatum(SGLTDATAPTR(tup), &state->attType, datum);
return tup;
}
