On Thu, Oct 29, 2020 at 12:02:11AM +0100, Tomas Vondra wrote: > On Wed, Oct 28, 2020 at 05:43:08PM -0300, Fabrízio de Royes Mello wrote: >> 2) REINDEX CONCURRENTLY does not keep statistics (pg_statistc) like a >> regular REINDEX for indexes using expressions and to me it's a bug. Michael >> pointed out upthread that maybe we should rework a bit >> index_concurrently_swap() to copy statistics from old index to new one. > > Yeah. Not sure it counts as a bug, but I see what you mean - it's > definitely an unexpected/undesirable difference in behavior between > plain REINDEX and concurrent one.
REINDEX CONCURRENTLY is by design wanted to provide an experience transparent to the user similar to what a plain REINDEX would do, at least that's the idea behind it, so.. This qualifies as a bug to me, in spirit. -- Michael
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