PostgreSQL false IntegrityError

Question

找不到解決方案。我現在傳遞一個元組列表來插入信息，而不是從另一個表中提取，問題就消失了。

我目前正在編寫將編輯表的代碼。我有幾行信息可以插入，但是不管順序如何，我都會在第四個元素上獲得IntegrityError。

這裏是我創建表：

CREATE TABLE segment_speed_live_layer(segment_id INTEGER PRIMARY KEY, 
             geom GEOMETRY(LINESTRING, 4326), 
             speed INTEGER); 

現在，SEGMENT_ID必須在另一臺匹配，所以它不是也不可能是序貫。下面是函數：

def update_layer(): 
    segment_cursor = connection.cursor() 
    segment_query = 'SELECT segment_id, speed FROM segment_speed_live ORDER BY segment_id' 
    exists_cursor = connection.cursor() 
    exists_query = 'SELECT EXISTS(SELECT 1 FROM segment_speed_live_layer WHERE segment_id=%s)' 
    insert_cursor = connection.cursor() 
    insert_query = """INSERT INTO segment_speed_live_layer(segment_id, geom, speed) 
         SELECT %(segment_id)s, geom_way, %(speed)s 
         FROM other_table 
         WHERE segment_id=%(segment_id)s""" 
    update_query = 'UPDATE segment_speed_live_layer SET speed=%(speed)s WHERE segment_id=%(segment_id)s' 
    segment_cursor.execute(segment_query) 
    for row in segment_cursor: 
     segment_id, speed = row 
     exists_cursor.execute(exists_query, (segment_id,)) 
     exists = exists_cursor.fetchone()[0] 
     query = update_query if exists else insert_query 
     print(segment_id, speed, exists) 
     print(insert_cursor.mogrify(query, {'segment_id': segment_id, 'speed': speed})) 
     insert_cursor.execute(query, {'segment_id': segment_id, 'speed': speed}) 
     print(insert_cursor.statusmessage) 
    connection.commit() 

如果我的速度命令，它無法在第五的第四個元素代替。它似乎在較低的ID上失敗。這是測試階段，所以我刪除並多次重新創建表，我KNOW這個表中沒有給定的ID行。

我已閱讀this question和this blog post但他們的解決方案不起作用，因爲我的ID沒有按順序或自動分配。

我現在唯一的想法是去除PRIMARY KEY約束，但這並不理想。

輸出以供參考：

(243, 69, False) 
INSERT INTO segment_speed_live_layer(segment_id, geom, speed) 
         SELECT 243, geom_way, 69 
         FROM other_table 
         WHERE other_table.segment_id=243 
INSERT 0 1 
(680, 9, False) 
INSERT INTO segment_speed_live_layer(segment_id, geom, speed) 
         SELECT 680, geom_way, 9 
         FROM other_table 
         WHERE other_table.segment_id=680 
INSERT 0 1 
(11599, 42, False) 
INSERT INTO segment_speed_live_layer(segment_id, geom, speed) 
         SELECT 11599, geom_way, 42 
         FROM other_table 
         WHERE other_table.segment_id=11599 
INSERT 0 1 
(16399, 40, False) 
INSERT INTO segment_speed_live_layer(segment_id, geom, speed) 
         SELECT 16399, geom_way, 40 
         FROM other_table 
         WHERE other_table.segment_id=16399 

Answer 1

做這一切在一次：

with u as (
    update segment_speed_live_layer ssll 
    set speed = ssl.speed 
    from segment_speed_live ssl 
    where ssl.segment_id = ssll.segment_id 
) 
insert into segment_speed_live_layer (segment_id, geom, speed) 
select segment_id, geom_way, speed 
from 
    other_table ot 
    cross join 
    segment_speed_live ssl 
where not exists (
    select 1 
    from segment_speed_live_layer 
    where segment_id = ssl.segment_id 
)