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- bookworm 1.23.1-1
MONGOC_MATCHER_T(3) | libmongoc | MONGOC_MATCHER_T(3) |
NAME¶
mongoc_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.
DEPRECATED¶
WARNING:
mongoc_matcher_t is deprecated and will be removed
in version 2.0.
EXAMPLE¶
Filter 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; }
AUTHOR¶
MongoDB, Inc
COPYRIGHT¶
2017-present, MongoDB, Inc
October 20, 2022 | 1.23.1 |