Function bson_dollar_size

pg_documentdb/src/query/bson_dollar_operators.c:621–638

* Traverses the document for a given dot-path notation * When a matching path is found, then returns true if the * element is an array with the specified size. Returns false * otherwise. */

 * otherwise.
 */
Datum
bson_dollar_size(PG_FUNCTION_ARGS)
{
	pgbson *document = PG_GETARG_PGBSON(0);
	pgbson *filter = PG_GETARG_PGBSON(1);

	bson_iter_t documentIterator;
	pgbsonelement filterElement;
	TraverseElementValidateState state = { 0 };
	PgbsonInitIterator(document, &documentIterator);
	PgbsonToSinglePgbsonElement(filter, &filterElement);
	filterElement.pathLength = 0;
	state.filter = &filterElement;
	state.traverseState.matchFunc = CompareArraySizeMatch;
	TraverseBson(&documentIterator, filterElement.path, &state.traverseState,
				 &CompareTopLevelFieldExecutionFuncs);
	PG_RETURN_BOOL(state.traverseState.compareResult == CompareResult_Match);
}


/*