Function bson_dollar_regex

pg_documentdb/src/query/bson_dollar_operators.c:982–996

* bson_dollar_regex implements the $regex functionality * in the runtime. This traverses the document based on * filter dot-notation syntax and for all possible values, checks * that at least one matches the regex on the value provided. */

 * that at least one matches the regex on the value provided.
 */
Datum
bson_dollar_regex(PG_FUNCTION_ARGS)
{
	pgbson *document = PG_GETARG_PGBSON(0);
	bson_iter_t documentIterator;
	TraverseRegexValidateState state = {
		{ 0 }, { 0 }
	};

	pgbsonelement filterElement = PopulateRegexState(fcinfo, &state);
	PgbsonInitIterator(document, &documentIterator);
	TraverseBson(&documentIterator, filterElement.path, &state.traverseState,
				 &CompareExecutionFuncs);
	PG_RETURN_BOOL(state.traverseState.compareResult == CompareResult_Match);
}


/*