MONGOC_MATCHER_T - Online Linux Manual Page
Section : 3
Updated : Feb 04, 2021
Source : 1.17.4
Note : libmongoc
NAMEmongoc_matcher_t − mongoc_matcher_t Client−side document matching abstraction
SYNOPSIS typedef struct _mongoc_matcher_t mongoc_matcher_t;
mongoc_matcher_t provides a reduced−interface for client−side matching of BSON documents. It can perform the basics such as $in, $nin, $eq, $neq, $gt, $gte, $lt, and $lte. WARNING: mongoc_matcher_t does not currently support the full spectrum of query operations that the MongoDB server supports.
DEPRECATEDWARNING: mongoc_matcher_t is deprecated and will be removed in version 2.0.
EXAMPLEFilter a sequence of BSON documents from STDIN based on a query #include <bson/bson.h>
#include <mongoc/mongoc.h>
#include <stdio.h>
int
main (int argc, char *argv[])
{
mongoc_matcher_t *matcher;
bson_reader_t *reader;
const bson_t *bson;
bson_t *spec;
char *str;
int fd;
mongoc_init ();
#ifdef _WIN32
fd = fileno (stdin);
#else
fd = STDIN_FILENO;
#endif
reader = bson_reader_new_from_fd (fd, false);
spec = BCON_NEW ("hello", "world");
matcher = mongoc_matcher_new (spec, NULL);
while ((bson = bson_reader_read (reader, NULL))) {
if (mongoc_matcher_match (matcher, bson)) {
str = bson_as_canonical_extended_json (bson, NULL);
printf ("%s\n", str);
bson_free (str);
}
}
bson_reader_destroy (reader);
bson_destroy (spec);
mongoc_cleanup ();
return 0;
}
AUTHORMongoDB, Inc
COPYRIGHT2017-present, MongoDB, Inc 0
Johanes Gumabo
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