Track nesting depth correctly when drilling down into RECORD Vars.
expandRecordVariable() failed to adjust the parse nesting structure
correctly when recursing to inspect an outer-level Var. This could
result in assertion failures or core dumps in corner cases.
Likewise, get_name_for_var_field() failed to adjust the deparse
namespace stack correctly when recursing to inspect an outer-level
Var. In this case the likely result was a "bogus varno" error
while deparsing a view.
Per bug #18077 from Jingzhou Fu. Back-patch to all supported
branches.
Richard Guo, with some adjustments by me
Discussion: https://postgr.es/m/18077-b9db97c6e0ab45d8@postgresql.org
Branch
------
REL_12_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/d29812c0c6cd58794cb1c0eb1603a17a1ceb0d0b
Modified Files
--------------
src/backend/parser/parse_target.c | 20 ++++++++----
src/backend/utils/adt/ruleutils.c | 37 ++++++++++++---------
src/test/regress/expected/rowtypes.out | 60 ++++++++++++++++++++++++++++++++++
src/test/regress/sql/rowtypes.sql | 25 ++++++++++++++
4 files changed, 120 insertions(+), 22 deletions(-)