Avoid scribbling on input node tree in CREATE/ALTER DOMAIN.
This works fine in the "simple Query" code path; but if the
statement is in the plan cache then it's corrupted for future
re-execution. Apply copyObject() to protect the original
tree from modification, as we've done elsewhere.
This narrow fix is applied only to the back branches. In HEAD,
the problem was fixed more generally by commit 7c337b6b5; but
that changed ProcessUtility's API, so it's infeasible to
back-patch.
Per bug #17053 from Charles Samborski.
Discussion: https://postgr.es/m/931771.1623893989@sss.pgh.pa.us
Discussion: https://postgr.es/m/17053-3ca3f501bbc212b4@postgresql.org
Branch
------
REL_12_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/b2c740c426daca2e43a2c86ff19661baf05ad00a
Modified Files
--------------
src/backend/commands/typecmds.c | 21 ++++++++++++++-------
1 file changed, 14 insertions(+), 7 deletions(-)
