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

Question

我有两个连续的观点：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’);

当我向 tickets_stream2 中插入数据时，出现断言错误。

TRAP: FailedAssertion("!(ActiveSnapshotSet())", File: "postgres.c", Line: 824, PID: 5275, Query: tickets2)

删除 second_view，数据插入 tickets_stream2 执行没有问题。

我不知道我错过了什么。

观察。我正在使用 PipelineDB 0.9.7

编辑：

同时我在没有 TO_TIMESTAMP() 函数的情况下尝试并且没有发生异常。

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 2，0.9.7u3 （可能对其他人有用）

我用更新的版本进行了测试。我不再遇到断言失败，但是当我将数据插入 test_version_stream.

时仍然发生错误

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，一切正常:)

Answer 1

此问题已通过 0.9.7 版的最新更新得到修复：

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

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

PipelineDB Continuous View Failed Assertion !(ActiveSnapshotSet())

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