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namespace isn't necessarily first in the search path (there could be implicit schemas ahead of it). Examples are test=# set search_path TO s1; test=# create view pg_timezone_names as select * from pg_timezone_names(); ERROR: "pg_timezone_names" is already a view test=# create table pg_class (f1 int primary key); ERROR: permission denied: "pg_class" is a system catalog You'd expect these commands to create the requested objects in s1, since names beginning with pg_ aren't supposed to be reserved anymore. What is happening is that we create the requested base table and then execute additional commands (here, CREATE RULE or CREATE INDEX), and that code is passed the same RangeVar that was in the original command. Since that RangeVar has schemaname = NULL, the secondary commands think they should do a path search, and that means they find system catalogs that are implicitly in front of s1 in the search path. This is perilously close to being a security hole: if the secondary command failed to apply a permission check then it'd be possible for unprivileged users to make schema modifications to system catalogs. But as far as I can find, there is no code path in which a check doesn't occur. Which makes it just a weird corner-case bug for people who are silly enough to want to name their tables the same as a system catalog. The relevant code has changed quite a bit since 8.2, which means this patch wouldn't work as-is in the back branches. Since it's a corner case no one has reported from the field, I'm not going to bother trying to back-patch. |
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| .. | ||
| aggregatecmds.c | ||
| alter.c | ||
| analyze.c | ||
| async.c | ||
| cluster.c | ||
| comment.c | ||
| conversioncmds.c | ||
| copy.c | ||
| dbcommands.c | ||
| define.c | ||
| discard.c | ||
| explain.c | ||
| functioncmds.c | ||
| indexcmds.c | ||
| lockcmds.c | ||
| Makefile | ||
| opclasscmds.c | ||
| operatorcmds.c | ||
| portalcmds.c | ||
| prepare.c | ||
| proclang.c | ||
| schemacmds.c | ||
| sequence.c | ||
| tablecmds.c | ||
| tablespace.c | ||
| trigger.c | ||
| tsearchcmds.c | ||
| typecmds.c | ||
| user.c | ||
| vacuum.c | ||
| vacuumlazy.c | ||
| variable.c | ||
| view.c | ||