Function blbuild

contrib/bloom/blinsert.c:120–158

* Build a new bloom index. */

 * Build a new bloom index.
 */
IndexBuildResult *
blbuild(Relation heap, Relation index, IndexInfo *indexInfo)
{
	IndexBuildResult *result;
	double		reltuples;
	BloomBuildState buildstate;

	if (RelationGetNumberOfBlocks(index) != 0)
		elog(ERROR, "index \"%s\" already contains data",
			 RelationGetRelationName(index));

	/* Initialize the meta page */
	BloomInitMetapage(index);

	/* Initialize the bloom build state */
	memset(&buildstate, 0, sizeof(buildstate));
	initBloomState(&buildstate.blstate, index);
	buildstate.tmpCtx = AllocSetContextCreate(CurrentMemoryContext,
											  "Bloom build temporary context",
											  ALLOCSET_DEFAULT_SIZES);
	initCachedPage(&buildstate);

	/* Do the heap scan */
	reltuples = table_index_build_scan(heap, index, indexInfo, true, true,
									   bloomBuildCallback, (void *) &buildstate,
									   NULL);

	/* Flush last page if needed (it will be, unless heap was empty) */
	if (buildstate.count > 0)
		flushCachedPage(index, &buildstate);

	MemoryContextDelete(buildstate.tmpCtx);

	result = (IndexBuildResult *) palloc(sizeof(IndexBuildResult));
	result->heap_tuples = reltuples;
	result->index_tuples = buildstate.indtuples;

	return result;
}

/*
 * Build an empty bloom index in the initialization fork.