Function GinBsonExtractQueryMod

pg_documentdb/src/opclass/bson_gin_core.c:2772–2801

* GinBsonExtractQueryMod generates the index term, needed to match * $mod on a dotted path, and value. * In this case, We return a lower bound value of the min value for that path. * Since we set the PartialMatch value to be true, the min value will be considered * a lower bound for the indexed search. * We also pass the $mod query value array of [Divisor, Remainder] as 'extraData' */

 * We also pass the $mod query value array of [Divisor, Remainder] as 'extraData'
 */
static Datum *
GinBsonExtractQueryMod(BsonExtractQueryArgs *args)
{
	int32 *nentries = args->nentries;
	bool **partialmatch = args->partialmatch;
	Pointer **extra_data = args->extra_data;

	Datum *entries;
	pgbsonelement documentElement;
	pgbsonelement filterElement = args->filterElement;

	*extra_data = (Pointer *) palloc(sizeof(Pointer));
	**extra_data = (Pointer) PgbsonElementToPgbson(&filterElement);

	/* find all values starting at mininum value. */
	documentElement.path = filterElement.path;
	documentElement.pathLength = filterElement.pathLength;
	documentElement.bsonValue.value_type = BSON_TYPE_DOUBLE;
	documentElement.bsonValue.value.v_double = (double) NAN;

	*nentries = 1;
	entries = (Datum *) palloc(sizeof(Datum));
	*partialmatch = (bool *) palloc(sizeof(bool));
	**partialmatch = true;
	entries[0] = PointerGetDatum(SerializeBsonIndexTerm(&documentElement,
														&args->termMetadata).
								 indexTermVal);

	return entries;
}


/*