PipelineDB连续视图断言失败!(ActiveSnapshotSet())

Question

我有两个连续的视图：tikets2和second_view

CREATE CONTINUOUS VIEW tickets2 AS 
   SELECT ticketid,
     TO_TIMESTAMP(min(event_time)::double precision /1000000) as t0,
     keyed_min(event_time, status) as t0_status,
     TO_TIMESTAMP(max(event_time)::double precision /1000000) as tc,
     keyed_max(event_time, status) as tc_status
   FROM tickets_stream2 
   group by ticketid;

CREATE CONTINUOUS VIEW second_view AS
SELECT (new).tc FROM output_of('tickets2’);

当我将数据插入到tickets_stream2中时，会得到一个断言错误。

陷阱: FailedAssertion("!(ActiveSnapshotSet())"，文件："postgres.c"，行: 824，PID: 5275，查询: tickets2)

删除second_view后，将数据插入到tickets_stream2中，执行时不会出现问题。

我不知道我错过了什么。

大胸。我使用的是PipelineDB 0.9.7

编辑：

同时，我尝试不使用TO_TIMESTAMP()函数，也没有出现异常。

CREATE CONTINUOUS VIEW tickets2 AS 
            SELECT 
                ticketid, 
                min(event_time) as t0, 
                keyed_min(event_time, status) as t0_status,
                max(event_time) as tc, 
                keyed_max(event_time, status) as tc_status   
            FROM tickets_stream_test_output 
            GROUP BY ticketid;

编辑2，带有0.9.7u3 (可能对其他人有用)

我用更新的版本进行了测试。我不再获得断言失败，但是当我将数据插入到test_version_stream中时仍然会发生错误。

CREATE STREAM test_version_stream(event_time bigint, ticketid uuid, status text);

CREATE CONTINUOUS VIEW test_version_view AS 
   SELECT ticketid,
     TO_TIMESTAMP(min(event_time)::double precision /1000000) as t
   FROM test_version_stream
   GROUP BY ticketid;

CREATE CONTINUOUS VIEW e_test_version_view AS
SELECT (new).t FROM output_of('test_version_view');

我更改了函数min和to_timestamp的顺序，一切都很好:)

Answer 1

这个问题已随0.9.7发行版的最新更新而得到修正：

https://github.com/pipelinedb/pipelinedb/releases