Function PgbsonGetDocumentId

pg_documentdb_core/src/io/pgbson.c:1888–1899

* PgbsonGetDocumentId returns the _id of a BSON document in projected form * as a bytea. */

 * as a bytea.
 */
pgbson *
PgbsonGetDocumentId(const pgbson *document)
{
	bson_iter_t iterator;
	if (!PgbsonInitIteratorAtPath(document, "_id", &iterator))
	{
		ereport(ERROR, (errmsg("unexpected: document does not have an _id")));
	}

	const bson_value_t *objectIdValue = bson_iter_value(&iterator);
	return BsonValueToDocumentPgbson(objectIdValue);
}


/*