nd_box_to_json()

static char* nd_box_to_json ( const ND_BOX *  nd_box, int  ndims  )

static

Convert an ND_BOX to a JSON string for printing.

Definition at line 404 of file gserialized_estimate.c.

References ND_BOX_T::max, ND_BOX_T::min, stringbuffer_append(), stringbuffer_aprintf(), stringbuffer_create(), stringbuffer_destroy(), and stringbuffer_getstringcopy().

Referenced by compute_gserialized_stats_mode(), estimate_join_selectivity(), estimate_selectivity(), nd_box_overlap(), and nd_stats_to_json().

{
        char *rv;
        int i;
        stringbuffer_t *sb = stringbuffer_create();

        stringbuffer_append(sb, "{\"min\":[");
        for ( i = 0; i < ndims; i++ )
        {
                if ( i ) stringbuffer_append(sb, ",");
                stringbuffer_aprintf(sb, "%.6g", nd_box->min[i]);
        }
        stringbuffer_append(sb,  "],\"max\":[");
        for ( i = 0; i < ndims; i++ )
        {
                if ( i ) stringbuffer_append(sb, ",");
                stringbuffer_aprintf(sb, "%.6g", nd_box->max[i]);
        }
        stringbuffer_append(sb,  "]}");

        rv = stringbuffer_getstringcopy(sb);
        stringbuffer_destroy(sb);
        return rv;
}

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