Function BsonHashCompare

pg_documentdb_core/src/query/bson_hash.c:476–504

static uint64
BsonHashCompare(bson_iter_t *bsonIterValue,
				uint64 (*hash_bytes_func)(const uint8_t *bytes, uint32_t bytesLength,
										  int64 seed),
				uint64 (*hash_combine_func)(uint64 left, uint64 right),
				int64 seed,
				const char *collationString)
{
	check_stack_depth();
	uint64_t hashValue = 0;
	while (bson_iter_next(bsonIterValue))
	{
		pgbsonelement leftElement;

		BsonIterToPgbsonElement(bsonIterValue, &leftElement);

		/* next compare field name. */
		uint64_t pathHash = hash_bytes_func((uint8_t *) leftElement.path,
											leftElement.pathLength, seed);
		hashValue = hash_combine_func(hashValue, pathHash);

		uint64_t valueHash = HashBsonValueCompare(&leftElement.bsonValue, hash_bytes_func,
												  hash_combine_func, seed,
												  collationString);
		hashValue = hash_combine_func(hashValue, valueHash);
	}

	return hashValue;
}


/*