Обсуждение: BUG #15691: ERROR: XX000: cannot update SecondarySnapshot during a parallel operation

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BUG #15691: ERROR: XX000: cannot update SecondarySnapshot during a parallel operation

От
PG Bug reporting form
Дата:
The following bug has been logged on the website:

Bug reference:      15691
Logged by:          zhongkuan fu
Email address:      fuzk80_76@163.com
PostgreSQL version: 10.3
Operating system:   Centos linux 7.4.1708
Description:

I cannot execute the following select sentence and got an error.

postgres=# SELECT
round(cast(coalesce(sum(ST_length(geography(geometry)))/1000,0) as
NUMERIC),4)||'KM' field_value from had_link;

ERROR:  XX000: cannot update SecondarySnapshot during a parallel operation
CONTEXT:  SQL statement "SELECT proj4text FROM public.spatial_ref_sys WHERE
srid = 4326 LIMIT 1"
parallel worker
LOCATION:  GetLatestSnapshot, snapmgr.c:387

Re: BUG #15691: ERROR: XX000: cannot update SecondarySnapshotduring a parallel operation

От
Alvaro Herrera
Дата:
On 2019-Mar-13, PG Bug reporting form wrote:

> The following bug has been logged on the website:
> 
> Bug reference:      15691
> Logged by:          zhongkuan fu
> Email address:      fuzk80_76@163.com
> PostgreSQL version: 10.3
> Operating system:   Centos linux 7.4.1708
> Description:        
> 
> I cannot execute the following select sentence and got an error.
> 
> postgres=# SELECT
> round(cast(coalesce(sum(ST_length(geography(geometry)))/1000,0) as
> NUMERIC),4)||'KM' field_value from had_link;
> 
> ERROR:  XX000: cannot update SecondarySnapshot during a parallel operation
> CONTEXT:  SQL statement "SELECT proj4text FROM public.spatial_ref_sys WHERE
> srid = 4326 LIMIT 1"
> parallel worker
> LOCATION:  GetLatestSnapshot, snapmgr.c:387

Sounds like a function is marked parallel-safe that shouldn't.

-- 
Álvaro Herrera                https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services