Sunday, September 7, 2008

[BUGS] BUG #4410: Indexes not seen right away

The following bug has been logged online:

Bug reference: 4410
Logged by: Greg Sabino Mullane
Email address:
PostgreSQL version: 8.3.3
Operating system: Linux
Description: Indexes not seen right away

I cannot reproduce, as this was on a production system and not seen again,
but I created a simple index on a TEXT field, which was not chosen by the
planner, even when seqscan was turned off. I analyzed the table, checked all
the settings, etc. pg_index looked as it should. Eventually (~ 10 minutes
later) the index as chosen - I don't know what might have triggered it to
start appearing. Creating a second table based on the first worked as it
should during the 'noindex' time period: CREATE TABLE foo AS SELECT * FROM
bar; CREATE INDEX foo_idx1 ON foo(textcol); EXPLAIN SELECT 1 FROM foo WHERE
textcol1 = 'baz';

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