Fix dependency handling at swap phase of REINDEX CONCURRENTLY
When swapping the dependencies of the old and new indexes, the code has
been correctly switching all links in pg_depend from the old to the new
index for both referencing and referenced entries. However it forgot
the fact that the new index may itself have existing entries in
pg_depend, like references to the parent table attributes. This
resulted in duplicated entries in pg_depend after running REINDEX
CONCURRENTLY.
Fix this problem by removing any existing entries in pg_depend for the
new index before switching the dependencies of the old index to the new
one. More regression tests are added to check the consistency of
entries in pg_depend for indexes, including partitions.
Author: Michael Paquier
Discussion: https://postgr.es/m/20191025064318.GF8671@paquier.xyz
Backpatch-through: 12
Branch
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REL_12_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/5e5f32284d691d0be71d6859c1de9b0367b26584
Modified Files
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src/backend/catalog/index.c | 6 +-
src/test/regress/expected/create_index.out | 126 +++++++++++++++++++++++++++++
src/test/regress/sql/create_index.sql | 54 +++++++++++++
3 files changed, 185 insertions(+), 1 deletion(-)