On 4/16/19 10:16 AM, Zahir Lalani wrote:
Which version? What are the queries you are running which give unexpected 
behavior? Have your run explain analyze on those to check >what plan is being 
used? Have your reindexed all or only the  one you suspect?

Hi Michael

Version: PostgreSQL 9.6.12 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36), 64-bit

Is this the same for the other environments?

What does:

SHOW lc_collate;

produce in each environment?

Are you doing the below through Navicat or psql?

If through Navicat, what happens if you use psql?


LIVE – production environment (as opposed to Dev and UAT)

Query: select id from briefs_master where ext_system_ref = '12345'

Explain:

Seq Scan on briefs_master  (cost=0.00..2937.90 rows=1 width=4) (actual time=18.082..18.082 rows=0 loops=1)

   Filter: ((ext_system_ref)::text = '12345'::text)

   Rows Removed by Filter: 31235

Planning time: 0.242 ms

Execution time: 18.096 ms

Reindex was done initially on the primary and then on all in the table.

So when we reset the data into the ext_system_ref field, the next query returns fine. However, the issue is that since the system thinks there is no primary, we are seeing this value get over-written with a null several minutes later as other rows are added

Z



--
Adrian Klaver
adrian.kla...@aklaver.com


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