Function AddNullArrayOpTerms

pg_documentdb/src/opclass/bson_gin_core.c:2367–2400

* Term generation for $eq: null type operators that take * arrays - this covers $in and $all scenarios */

 * arrays - this covers $in and $all scenarios
 */
inline static int
AddNullArrayOpTerms(Datum *entries, int index,
					DollarArrayOpQueryData *inQueryData,
					pgbsonelement *queryElement,
					IndexTermCreateMetadata *termMetadata)
{
	entries[index] = GenerateRootTerm(termMetadata);
	inQueryData->rootTermIndex = index;
	index++;

	entries[index] = GenerateRootExistsTerm(termMetadata);
	inQueryData->rootExistsTermIndex = index;
	index++;

	entries[index] = GenerateRootNonExistsTerm(termMetadata);
	inQueryData->nonExistsTermIndex = index;
	index++;

	entries[index] = GenerateRootMultiKeyTerm(termMetadata);
	inQueryData->multiKeyTermIndex = index;
	index++;

	pgbsonelement undefinedElement;
	undefinedElement.path = queryElement->path;
	undefinedElement.pathLength = queryElement->pathLength;
	undefinedElement.bsonValue.value_type = BSON_TYPE_UNDEFINED;
	BsonIndexTermSerialized serializedTerm = SerializeBsonIndexTerm(&undefinedElement,
																	termMetadata);
	entries[index] = PointerGetDatum(serializedTerm.indexTermVal);
	inQueryData->undefinedLiteralTermIndex = index;
	index++;

	return index;
}


/*