Function bson_dollar_unwind

pg_documentdb/src/aggregation/bson_unwind.c:141–153

* bson_dollar_unwind takes: * 1) a bson document * 2) a dot notation field path to the purported array * 3) an optional text for an index field in the output * 4) a boolean indicating whether to preserve null and empty arrays */

 * 4) a boolean indicating whether to preserve null and empty arrays
 */
Datum
bson_dollar_unwind(PG_FUNCTION_ARGS)
{
	char *indexFieldName = NULL;
	bool preserveNullAndEmpty = false;

	TupleDesc descriptor;
	Tuplestorestate *tupleStore = SetupBsonTuplestore(fcinfo, &descriptor);

	return BsonUnwindArray(fcinfo, tupleStore, &descriptor, text_to_cstring(
							   PG_GETARG_TEXT_PP(1)), indexFieldName,
						   preserveNullAndEmpty);
}


/*