Re: pgsql: Get rid of pg_class.reltoastidxid.

Hi Fujii, Michael,

Coverity indicated that there's a problem with this - a quick look
confirms that:

    foreach(lc, indexlist)
        (*toastidxs)[i++] = index_open(lfirst_oid(lc), lock);

    /* Fetch the first valid index in list */
    for (i = 0; i < *num_indexes; i++)
    {
        Relation toastidx = *toastidxs[i];
        if (toastidx->rd_index->indisvalid)
        {
            res = i;
            found = true;
            break;
        }
    }

Note how the second access to toastidxs is missing parentheses. It
should be (*toastidxs)[i].

I think this happens to mostly work because usually the older index will
still be valid when we open the toast indexes when there are multiple
ones and RelationGetIndexList() returns indexes in toast order.

Greetings,

Andres Freund

--
 Andres Freund                       http://www.2ndQuadrant.com/
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