Hi - been having a few problems like this myself. It's probably a
locale thing.

Here's at one of your problems:

         ->  Seq Scan on sms_new  (cost=0.00..5240444.80
rows=138939341 width=8)
               Filter: ((otid)::text !~~ 'ERROR%'::text)

I assume you have an index on sms_new?

Check the locale your database cluster has been set up with:

     SHOW lc_ctype

if it doesn't come back with "C" as your locale, then you will have to
make sure your indexes are created as follows:

CREATE INDEX IDX_sms_new
  ON YOUR_TABLE
  USING btree
  (sms_new varchar_pattern_ops);

Look at chapter 11.8 - Operator Classes for an explanation.

Unfortunately you'll need a second index if you want to use a non-
pattern matching operator, e.g. =.

If your locale is C, then I don't know what the problem is.

Hope that helps.

Will Temperley

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