Function GinBsonExtractQueryEqual

pg_documentdb/src/opclass/bson_gin_core.c:1883–1907

* GinBsonExtractQueryEqual generates the index term needed to match * equality on a dotted path and value. * In this case, we can simply return the term as the value stored * in the index will be exactly the value being queried. * The query is expected to be of the format {path}{typeCode}{value} * i.e. a BsonElement. */

 * i.e. a BsonElement.
 */
static Datum *
GinBsonExtractQueryEqual(BsonExtractQueryArgs *args)
{
	int32 *nentries = args->nentries;
	bool **partialmatch = args->partialmatch;
	Datum *entries;
	pgbsonelement filterElement = args->filterElement;

	if (filterElement.bsonValue.value_type == BSON_TYPE_NULL)
	{
		/* special case for $eq on null. */
		entries = GenerateNullEqualityIndexTerms(nentries, partialmatch,
												 &filterElement, &args->termMetadata);
	}
	else
	{
		*nentries = 1;
		entries = (Datum *) palloc(sizeof(Datum));
		entries[0] = PointerGetDatum(SerializeBsonIndexTerm(&filterElement,
															&args->termMetadata).
									 indexTermVal);
	}

	return entries;
}


/*