On 3/12/19 7:54 PM, fuzk wrote:
Dear Sir/Madam
I got an error when I execute the following select sentence.
Would you please solve the problem for me?
What version of Postgres?
Thank you .
Alan Fu.
postgres=# \set VERBOSITY verbose
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
I'm guessing ST_length is not parallel safe.
What is your setting for?:
max_parallel_workers_per_gather
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
