Function bloomBuildCallback

contrib/bloom/blinsert.c:73–115

* Per-tuple callback for table_index_build_scan. */

 * Per-tuple callback for table_index_build_scan.
 */
static void
bloomBuildCallback(Relation index, ItemPointer tid, Datum *values,
				   bool *isnull, bool tupleIsAlive, void *state)
{
	BloomBuildState *buildstate = (BloomBuildState *) state;
	MemoryContext oldCtx;
	BloomTuple *itup;

	oldCtx = MemoryContextSwitchTo(buildstate->tmpCtx);

	itup = BloomFormTuple(&buildstate->blstate, tid, values, isnull);

	/* Try to add next item to cached page */
	if (BloomPageAddItem(&buildstate->blstate, buildstate->data.data, itup))
	{
		/* Next item was added successfully */
		buildstate->count++;
	}
	else
	{
		/* Cached page is full, flush it out and make a new one */
		flushCachedPage(index, buildstate);

		CHECK_FOR_INTERRUPTS();

		initCachedPage(buildstate);

		if (!BloomPageAddItem(&buildstate->blstate, buildstate->data.data, itup))
		{
			/* We shouldn't be here since we're inserting to the empty page */
			elog(ERROR, "could not add new bloom tuple to empty page");
		}

		/* Next item was added successfully */
		buildstate->count++;
	}

	/* Update total tuple count */
	buildstate->indtuples += 1;

	MemoryContextSwitchTo(oldCtx);
	MemoryContextReset(buildstate->tmpCtx);
}

/*
 * Build a new bloom index.