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fetch count and paginated data in one query

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Harald Bamberger
2026-02-16 14:18:59 +01:00
parent 827b6148a7
commit 5415180b2c
1 changed files with 51 additions and 54 deletions
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application/models/system/Message_model.php
+51 -54
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@@ -242,74 +242,71 @@ class Message_model extends DB_Model
*/
public function getMessagesForTable($person_id, $offset, $limit)
{
$sql_base = "
SELECT
$sql = <<<EOSQL
with filtered_messages as (
select
m.message_id, m.person_id as sender_id, mr.person_id as recipient_id
from
public.tbl_msg_message m
join
public.tbl_msg_recipient mr on mr.message_id = m.message_id
where
m.person_id = ? or mr.person_id = ?
group by
m.message_id, m.person_id, mr.person_id
), lastmsgstatus as (
select
ms.*
from (
select
s.message_id, s.person_id, MAX(s.insertamum) as lastinserted
from
public.tbl_msg_status s
group by
s.message_id, s.person_id
) ls
join
public.tbl_msg_status ms on ms.message_id = ls.message_id and ms.person_id = ls.person_id and ms.insertamum = ls.lastinserted
)
select
(select count(*) from filtered_messages) as total_msgs,
m.message_id AS message_id,
m.subject AS subject,
m.body AS body,
m.insertamum AS insertamum,
m.relationmessage_id AS relationmessage_id,
(SELECT COALESCE(titelpre,'') || ' ' || COALESCE(vorname,'') || ' ' || COALESCE(nachname,'') || ' ' || COALESCE(titelpost,'') FROM public.tbl_person WHERE person_id = m.person_id) as sender,
(SELECT COALESCE(titelpre,'') || ' ' || COALESCE(vorname,'') || ' ' || COALESCE(nachname,'') || ' ' || COALESCE(titelpost,'') FROM public.tbl_person WHERE person_id = r.person_id) as recipient,
m.person_id as sender_id,
r.person_id as recipient_id,
MAX(ss.status) as status,
MAX(ss.insertamum) as statusdatum
FROM public.tbl_msg_message m
JOIN public.tbl_msg_recipient r USING(message_id)
JOIN public.tbl_msg_status ss ON(r.message_id = ss.message_id AND ss.person_id = r.person_id)
WHERE m.person_id = ?
GROUP BY m.message_id, m.subject, m.body, m.insertamum, m.relationmessage_id, sender, recipient, sender_id, recipient_id
UNION ALL
SELECT
m.message_id AS message_id,
m.subject AS subject,
m.body AS body,
m.insertamum AS insertamum,
m.relationmessage_id AS relationmessage_id,
(SELECT COALESCE(titelpre,'') || ' ' || COALESCE(vorname,'') || ' ' || COALESCE(nachname,'') || ' ' || COALESCE(titelpost,'') FROM public.tbl_person WHERE person_id = m.person_id) as sender,
(SELECT COALESCE(titelpre,'') || ' ' || COALESCE(vorname,'') || ' ' || COALESCE(nachname,'') || ' ' || COALESCE(titelpost,'') FROM public.tbl_person WHERE person_id = r.person_id) as recipient,
m.person_id as sender_id,
r.person_id as recipient_id,
MAX(ss.status) as status,
MAX(ss.insertamum) as statusdatum
FROM public.tbl_msg_recipient r
JOIN public.tbl_msg_status ss USING(message_id, person_id)
JOIN public.tbl_msg_message m USING(message_id)
WHERE r.person_id = ?
GROUP BY m.message_id, m.subject, m.body, m.insertamum, m.relationmessage_id, sender, recipient, sender_id, recipient_id
";
$sql = "
SELECT COUNT(*) AS count FROM (
" . $sql_base . "
) a
";
$parametersArray = array($person_id, $person_id);
$count = $this->execQuery($sql, $parametersArray);
if (isError($count))
return $count;
$count = ceil(current(getData($count))->count/$limit);
$sql = "
SELECT * FROM (
" . $sql_base . "
) a
ORDER BY insertamum DESC
LIMIT ?
OFFSET ?
";
(SELECT COALESCE(titelpre,'') || ' ' || COALESCE(vorname,'') || ' ' || COALESCE(nachname,'') || ' ' || COALESCE(titelpost,'') FROM public.tbl_person WHERE person_id = fm.sender_id) as sender,
(SELECT COALESCE(titelpre,'') || ' ' || COALESCE(vorname,'') || ' ' || COALESCE(nachname,'') || ' ' || COALESCE(titelpost,'') FROM public.tbl_person WHERE person_id = fm.recipient_id) as recipient,
fm.sender_id,
fm.recipient_id,
ms.status,
ms.insertamum as statusdatum
from
filtered_messages fm
join
public.tbl_msg_message m on fm.message_id = m.message_id
join
lastmsgstatus ms on fm.message_id = ms.message_id and fm.recipient_id = ms.person_id
order by
m.insertamum DESC
limit ?
offset ?;
EOSQL;
$parametersArray = array($person_id, $person_id, $limit, $offset);
$count = 0;
$data = $this->execQuery($sql, $parametersArray);
if (isError($data))
return $data;
$data = getData($data);
if($data)
{
$count = ceil($data[0]->total_msgs / $limit);
}
return success(['data' => $data, 'count' => $count]);
}