exclusive:
fail if the object exists. When false (the default), if the object exists, check that its settings match the specified configuration.

    /* Check if the table already exists. */
    if ((ret = __wt_metadata_search(session, uri, &tablecfg)) != WT_NOTFOUND) {
        /*
         * Regardless of the 'exclusive' flag, we should raise an error if we try to import an
         * existing URI rather than just silently returning.
         */
        if (exclusive || import)
            WT_TRET(EEXIST);
        goto err;
    }