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Optimize PostGIS queries in DataRepository #449

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Optimize PostGIS queries in DataRepository #449

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25 changes: 14 additions & 11 deletions src/Repository/DataRepository.php
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Original file line number Diff line number Diff line change
Expand Up @@ -104,30 +104,33 @@ public function findDataForCoronaFireworksAnalysis(CoordInterface $coord): array
->addFieldResult('s', 'provider', 'provider')
;

$sql = 'SELECT DISTINCT ON (date_trunc(\'hour\', date_time)) data_id, value, pollutant, date_time, station_id, title, latitude, longitude, station_code, station_type, provider
FROM silvester_data
WHERE station_id IN (SELECT id FROM station WHERE coord <-> ST_MakePoint(?, ?) < 2 ORDER BY coord <-> ST_MakePoint(?, ?) ASC)
AND pollutant = 1
$sql = 'WITH search_point AS (
SELECT ST_MakePoint(?, ?) AS point
),
nearby_stations AS (
SELECT s.id, s.coord <-> (SELECT point FROM search_point) AS dist
FROM station s
WHERE s.coord <-> (SELECT point FROM search_point) < 2
ORDER BY dist ASC
)
SELECT DISTINCT ON (date_trunc(\'hour\', date_time)) data_id, value, pollutant, date_time, station_id, title, latitude, longitude, station_code, station_type, provider
FROM silvester_data sd
INNER JOIN nearby_stations ns ON ns.id = sd.station_id
WHERE pollutant = 1
AND ((DATE_PART(\'day\', date_time) = 31 AND DATE_PART(\'hour\', date_time) >= 17) OR (DATE_PART(\'day\', date_time) = 1 AND DATE_PART(\'hour\', date_time) <= 7))
ORDER BY date_trunc(\'hour\', date_time), coord <-> ST_MakePoint(?, ?) ASC, value DESC';
ORDER BY date_trunc(\'hour\', date_time), ns.dist ASC, value DESC';

$query = $this->getEntityManager()->createNativeQuery($sql, $rsm);
$query
->setParameter(1, $coord->getLongitude())
->setParameter(2, $coord->getLatitude())
->setParameter(3, $coord->getLongitude())
->setParameter(4, $coord->getLatitude())
->setParameter(5, $coord->getLongitude())
->setParameter(6, $coord->getLatitude())
;

return $query->getResult();
}

public function refreshMaterializedView(): void
{
$sql = 'REFRESH MATERIALIZED VIEW data_view;';
$sql = 'REFRESH MATERIALIZED VIEW silvester_data;';
$sql = 'REFRESH MATERIALIZED VIEW current_data;';

$query = $this->getEntityManager()->createNativeQuery($sql, new ResultSetMapping());
Expand Down