Re: Making jsonb_agg() faster - Mailing list pgsql-hackers

On Thu, Aug 14, 2025 at 4:59 PM jian he <jian.universality@gmail.com> wrote:
>
> > 0001 is a somewhat invasive refactoring of the API for
> > pushJsonbValue and friends.

in pushJsonbValue:

    /*
     * pushJsonbValueScalar handles all cases not involving pushing a
     * container object as an ELEM or VALUE.
     */
    if (!jbval || (seq != WJB_ELEM && seq != WJB_VALUE))
    {
        pushJsonbValueScalar(pstate, seq, jbval);
        return;
    }
    /* If it's not a jbvBinary value, again it goes to pushJsonbValueScalar */
    if (jbval->type != jbvBinary)
    {
        pushJsonbValueScalar(pstate, seq, jbval);
        return;
    }

we can combine above these two into
    if (!jbval || (seq != WJB_ELEM && seq != WJB_VALUE) ||
IsAJsonbScalar(jbval))
    {
        pushJsonbValueScalar(pstate, seq, jbval);
        return;
    }
and put it in the earlier position of pushJsonbValue.