If you add "delimident=y" to the driver parameter of a Server Registration for an Information connection and then try to show the Procedure Properties for a procedure, it will fail at extraction.  This query will be executed and it will fail :

SELECT
    OWNER,
    PROCNAME,
    DATA,
    SP.PROCID,
    ifx_param_types(sp.procid) param_types,
    seqno
from
    informix.sysprocedures sp,
    informix.sysprocbody sb
where
    sp.procid = sb.procid and
    datakey = 'T' and
    UPPER(procname) = UPPER('metadata') and
    UPPER(owner) = UPPER('sysibm') and
    ifx_param_types(sp.procid) = "" and
    externalname is null
order by
    sb.seqno

Reason for failure is the double quotes used in [ifx_param_types(sp.procid = ""] where we should use single quotes.