ex_config.c

Shows how to configure some properties of the database and tables.

/*-
 * Public Domain 2014-2016 MongoDB, Inc.
 * Public Domain 2008-2014 WiredTiger, Inc.
 *
 * This is free and unencumbered software released into the public domain.
 *
 * Anyone is free to copy, modify, publish, use, compile, sell, or
 * distribute this software, either in source code form or as a compiled
 * binary, for any purpose, commercial or non-commercial, and by any
 * means.
 *
 * In jurisdictions that recognize copyright laws, the author or authors
 * of this software dedicate any and all copyright interest in the
 * software to the public domain. We make this dedication for the benefit
 * of the public at large and to the detriment of our heirs and
 * successors. We intend this dedication to be an overt act of
 * relinquishment in perpetuity of all present and future rights to this
 * software under copyright law.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * ex_config.c
 *      This is an example demonstrating how to configure various database and
 *      table properties.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <wiredtiger.h>

static const char *home;

int
main(void)
{
        int ret;
        WT_CONNECTION *conn;
        WT_SESSION *session;
        WT_CURSOR *cursor;
        const char *key, *value;

        /*
         * Create a clean test directory for this run of the test program if the
         * environment variable isn't already set (as is done by make check).
         */
        if (getenv("WIREDTIGER_HOME") == NULL) {
                home = "WT_HOME";
                ret = system("rm -rf WT_HOME && mkdir WT_HOME");
        } else
                home = NULL;

        if ((ret = wiredtiger_open(home, NULL,
            "create,cache_size=500M", &conn)) != 0)
                fprintf(stderr, "Error connecting to %s: %s\n",
                    home, wiredtiger_strerror(ret));
        ret = conn->open_session(conn, NULL, NULL, &session);

        ret = session->create(session,
            "table:access", "key_format=S,value_format=S");
        ret = session->begin_transaction(session, "priority=100,name=mytxn");

        ret = session->open_cursor(session, "config:", NULL, NULL, &cursor);

        while ((ret = cursor->next(cursor)) == 0) {
                ret = cursor->get_key(cursor, &key);
                ret = cursor->get_value(cursor, &value);
                printf("configuration value: %s = %s\n", key, value);
        }

        ret = session->commit_transaction(session, NULL);
        ret = conn->close(conn, NULL);

        return (ret);
}