NAME

       mongoc_collection_count() - This function shall execute a count query on the underlying 'collection'. The
       bson 'query' is not validated, simply passed along as appropriate to the server.  As such,  compatibility
       and errors should be validated in the appropriate server documentation.

SYNOPSIS

       int64_t
       mongoc_collection_count (mongoc_collection_t       *collection,
                                mongoc_query_flags_t       flags,
                                const bson_t              *query,
                                int64_t                    skip,
                                int64_t                    limit,
                                const mongoc_read_prefs_t *read_prefs,
                                bson_error_t              *error);

PARAMETERS

       collection
              A mongoc_collection_t \&.

       flags  A mongoc_query_flags_t \&.

       query  A bson_t containing the query.

       skip   A int64_t, zero to ignore.

       limit  A int64_t, zero to ignore.

       read_prefs
              A mongoc_read_prefs_t or NULL \&.

       error  An optional location for a bson_error_t or NULL \&.

DESCRIPTION

       This  function  shall  execute  a  count  query  on  the underlying 'collection'. The bson 'query' is not
       validated, simply passed along as appropriate to the server.  As such, compatibility and errors should be
       validated in the appropriate server documentation.

       For more information, see the query reference at the MongoDB website.

       NOTE
              The mongoc_read_concern_t specified on the mongoc_collection_t will be used, if any.

ERRORS

       Errors are propagated via the error parameter.

RETURNS

       ‐1 on failure, otherwise the number of documents counted.

EXAMPLE

       #include <mongoc.h>
       #include <bcon.h>
       #include <stdio.h>

       static void
       print_query_count (mongoc_collection_t *collection,
                          bson_t              *query)
       {
          bson_error_t error;
          int64_t count;

          count = mongoc_collection_count (collection, MONGOC_QUERY_NONE, query, 0, 0, NULL, &error);

          if (count < 0) {
             fprintf (stderr, "Count failed: %s\n", error.message);
          } else {
             printf ("%"PRId64" documents counted.\n", count);
          }
       }

COLOPHON

       This     page     is     part     of    MongoDB    C    Driver.     Please    report    any    bugs    at
       https://jira.mongodb.org/browse/CDRIVER.