Hello everyone. This is the first time that I see this in debugger. I wasn’t using Yii2 for last few months, so maybe I missed some update. When I create model and CRUD using Gii, I get DocumentSearch model.
So I am using the default code made by Gii. Table has around 1.3M rows. And these are the queries that I see in debugger:
SELECT
kcu.constraint_name,
kcu.column_name,
kcu.referenced_table_name,
kcu.referenced_column_name
FROM information_schema.referential_constraints AS rc
JOIN information_schema.key_column_usage AS kcu ON
(
kcu.constraint_catalog = rc.constraint_catalog OR
(kcu.constraint_catalog IS NULL AND rc.constraint_catalog IS NULL)
) AND
kcu.constraint_schema = rc.constraint_schema AND
kcu.constraint_name = rc.constraint_name
WHERE rc.constraint_schema = database() AND kcu.table_schema = database()
AND rc.table_name = 'document' AND kcu.table_name = 'document'
SHOW FULL COLUMNS FROM `document`
SELECT * FROM `document` LIMIT 20
SELECT COUNT(*) FROM `document`
I have managed to cache 3) and 4), but I do not know what to do with 1). Becasue query 1) is executing for about 500ms, which is pretty much for me, since I will have to join few big tables, and I really want to avoid executing same queries over and over, especially if they are slow.
My question is, can someone explain to me the purpose of query 1), when/what is executing it, and can it be cached somehow ?
Here is my code of search method in DocumentSearch model:
public function search($params)
{
$query = Document::find();
// add conditions that should always apply here
$dataProvider = new ActiveDataProvider([
'query' => $query,
]);
$this->load($params);
if (!$this->validate()) {
// uncomment the following line if you do not want to return any records when validation fails
// $query->where('0=1');
return $dataProvider;
}
self::getDb()->cache(function ($db) use ($dataProvider) {
$dataProvider->prepare();
}, 3600);
return $dataProvider;
}
And btw, queries 3) and 4) are executing in less than 1ms each.