>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 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
