我想为一些gtfs-feed数据添加一个非规范化表。为此,我创建了一个新表格:Postgresql错误地插入值
CREATE TABLE denormalized_trips (
stops_coords json NOT NULL,
stops_object json NOT NULL,
agency_key text NOT NULL,
trip_id text NOT NULL,
route_id text NOT NULL,
service_id text NOT NULL,
shape_id text,
route_color text,
route_long_name text,
route_desc text,
direction_id text
);
CREATE INDEX denormalized_trips_index ON denormalized_trips (agency_key, trip_id);
CREATE UNIQUE INDEX denormalized_trips_index ON denormalized_trips (agency_key, route_id);
现在我想通过insert语句将数据从一个表传输到另一个表。声明相当复杂。
INSERT INTO denormalized_trips
SELECT
trps.stops_coords,
trps.stops_object,
trps.trip_id,
trps.service_id,
trps.route_id,
trps.direction_id,
trps.agency_key,
trps.shape_id,
trps.route_color,
trps.route_long_name,
trps.route_desc
FROM (
SELECT
array_to_json(ARRAY_AGG(array[stop_lat, stop_lon])) AS stops_coords,
array_to_json(ARRAY_AGG(array[
stops.stop_id,
CAST (stop_times.stop_sequence AS TEXT),
stops.stop_name,
stop_times.departure_time,
CAST (stop_times.departure_time_seconds AS TEXT),
stop_times.arrival_time,
CAST (stop_times.arrival_time_seconds AS TEXT)
])) AS stops_object,
trips.trip_id,
trips.service_id,
trips.direction_id,
trips.agency_key,
trips.shape_id,
routes.route_id,
routes.route_color,
routes.route_long_name,
routes.route_desc
FROM gtfs_stop_times AS stop_times
INNER JOIN gtfs_trips AS trips
ON trips.trip_id = stop_times.trip_id AND trips.agency_key = stop_times.agency_key
INNER JOIN gtfs_routes AS routes ON trips.agency_key = routes.agency_key AND routes.route_id = trips.route_id
INNER JOIN gtfs_stops AS stops
ON stops.stop_id = stop_times.stop_id
AND stops.agency_key = stop_times.agency_key
AND NOT EXISTS (
SELECT 0
FROM denormalized_max_stop_sequence AS max
WHERE max.agency_key = stop_times.agency_key
AND max.trip_id = stop_times.trip_id
AND max.trip_max = stop_times.stop_sequence
)
GROUP BY
trips.trip_id,
trips.service_id,
trips.direction_id,
trips.agency_key,
trips.shape_id,
routes.route_id,
routes.route_color,
routes.route_long_name,
routes.route_desc
) as trps
如果我只是运行内部select语句,我会得到正确的结果。他们看起来是这样的:(截图没有显示所有的表,因为它太长)
但如果我执行INSERT语句,并显示表的内容,我会得到这样的:
正如您可能注意到内容未插入到表格的右列中。 agency_key现在具有trip_id的值,并且direction_id现在是service_id(并且有更多的表被混淆)。
所以我的问题是我做错了,我的插入语句插入内容到新创建表的错误列?
感谢您的帮助。
多数民众赞成它!我将我的选择语句重新排序,现在它可以工作。这让我非常头疼。感谢你的回答 –