Re: when do I analyze after concurrent index creation?

dinesh kumar <dineshkumar02@gmail.com> writes:
> When we create an index, i believe the postgres engine it self update it's
> catalog about the index availability.

ANALYZE normally collects statistics about the contents of table columns.
Thus, adding (or removing) an index does not create any reason to
re-ANALYZE.

However ... if you have an index on an expression (not just a simple
column value), that cues ANALYZE to collect statistics about the values of
that expression.  So re-analyzing is useful after creating such an index,
to give the planner a better idea of when to use that index.

Whether you used CREATE INDEX CONCURRENTLY or some other way of creating
the index doesn't matter at all.

                        regards, tom lane