Function GetIndexTypeFromKeyDocument

pg_documentdb/src/metadata/index.c:2325–2352

* Utility function that iterates on the index keyDocument pgbson and returns the index plugin * name upon finding the first match. If no match is found, return "regular". */

 * name upon finding the first match. If no match is found, return "regular".
 */
const char *
GetIndexTypeFromKeyDocument(pgbson *keyDocument)
{
	const char *regularIndexType = "regular";

	/* Assume document is of regular type if pgbson is NULL.*/
	if (keyDocument == NULL)
	{
		return regularIndexType;
	}

	bson_iter_t iter;
	PgbsonInitIterator(keyDocument, &iter);
	while (bson_iter_next(&iter))
	{
		const bson_value_t *value = bson_iter_value(&iter);
		for (int i = 0; i < NumberOfMongoIndexTypes; i++)
		{
			MongoIndexSupport idxSupport = MongoIndexSupportedList[i];
			if (IsIndexOfType(value, idxSupport.mongoIndexName))
			{
				return idxSupport.mongoIndexName;
			}
		}
	}

	return regularIndexType;
}


/*