pgsql: Fix assertion if index is dropped during REFRESH CONCURRENTLY - Mailing list pgsql-committers

Fix assertion if index is dropped during REFRESH CONCURRENTLY

When assertions are disabled, the built SQL statement is invalid and
you get a "syntax error". So this isn't a serious problem, but let's
avoid the assertion failure.

Backpatch to all supported versions.

Reviewed-by: Noah Misch

Branch
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REL_13_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/b73d216489e1ee480b19d6ad31b784ea33c352f3

Modified Files
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src/backend/commands/matview.c        |  7 +++++--
src/test/regress/expected/matview.out | 16 ++++++++++++++++
src/test/regress/sql/matview.sql      | 17 +++++++++++++++++
3 files changed, 38 insertions(+), 2 deletions(-)