pgsql: CREATE INDEX: do update index stats if autovacuum=off.

CREATE INDEX: do update index stats if autovacuum=off.

This fixes a thinko from commit d611f8b15. The intent was to prevent
updating the stats of the pre-existing heap if autovacuum is off,
but it also disabled updating the stats of the just-created index.
There is AFAICS no good reason to do the latter, since there could not
be any pre-existing stats to refrain from overwriting, and the zeroed
stats that are there to begin with are very unlikely to be useful.
Moreover, the change broke our cross-version upgrade tests again.

Author: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Discussion: https://postgr.es/m/1116282.1741374848@sss.pgh.pa.us

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/29d6808edebb3eced76e2acbbcf453dd693ac6bf

Modified Files
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src/backend/catalog/index.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)