pgsql: Check stack depth in new recursive functions

Check stack depth in new recursive functions

Commit b0e96f311985 introduced a bunch of recursive functions, but
failed to make them check for stack depth.  This can cause the backend
to crash when operating on inheritance hierarchies several thousands
deep.  Protect the code by adding the missing stack depth checks.

Reported-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/b2ac2392-9727-5f76-e890-721ac80c1615@gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/b0f7dd915bca6243f3daf52a81b8d0682a38ee3b

Modified Files
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src/backend/commands/tablecmds.c | 12 ++++++++++++
1 file changed, 12 insertions(+)