Thread: pgsql: Skip system attributes when applying mvdistinct stats
Skip system attributes when applying mvdistinct stats When estimating number of distinct groups, we failed to ignore system attributes when matching the group expressions to mvdistinct stats, causing failures like ERROR: negative bitmapset member not allowed Fix that by simply skipping anything that is not a regular attribute. Backpatch to PostgreSQL 10, where the extended stats were introduced. Bug: #16111 Reported-by: Tuomas Leikola Author: Tomas Vondra Backpatch-through: 10 Discussion: https://postgr.es/m/16111-687799584c3a7e73@postgresql.org Branch ------ REL_11_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/25a9ff6cadbb2099a5f53876d9e29f35a080df43 Modified Files -------------- src/backend/utils/adt/selfuncs.c | 19 ++++++++++++++----- src/test/regress/expected/stats_ext.out | 12 ++++++++++++ src/test/regress/sql/stats_ext.sql | 4 ++++ 3 files changed, 30 insertions(+), 5 deletions(-)