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Re: column level privileges

From: sanjay sharma <sanksh(at)hotmail(dot)com>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>, PostgreSQL-development<pgsql-hackers(at)postgresql(dot)org>
Subject: Re: column level privileges
Date: 2008-04-02 01:48:34
Message-ID: BAY116-W475CFE3BD9D6D055022B0FC3F40@phx.gbl (view raw or flat)
Lists: pgsql-hackers
Hello Andrew,
When do you expect this patch to go in production and available for public use? I would keep an eye for its release.
Sanjay Sharma> Date: Tue, 1 Apr 2008 18:40:24 -0400> From: andrew(at)dunslane(dot)net> To: pgsql-hackers(at)postgresql(dot)org> Subject: [HACKERS] column level privileges> > > Apologies if this gets duplicated - original seems to have been dropped > due to patch size - this time I am sending it gzipped.> > cheers> > andrew> > -------- Original Message --------> Subject: column level privileges> Date: Tue, 01 Apr 2008 08:32:25 -0400> From: Andrew Dunstan <andrew(at)dunslane(dot)net>> To: Patches (PostgreSQL) <pgsql-patches(at)postgresql(dot)org>> > > > This patch by Golden Lui was his work for the last Google SoC. I was his > mentor for the project. I have just realised that he didn't send his > final patch to the list.> > I guess it's too late for the current commit-fest, but it really needs > to go on a patch queue (my memory on this was jogged by Tom's recent > mention of $Subject).> > I'm going to see how much bitrot there is and see what changes are > necessary to get it to apply.> > cheers> > andrew> > > -------------> Here is a README for the whole patch.> > According to the SQL92 standard, there are four levels in the privilege > hierarchy, i.e. database, tablespace, table, and column. Most commercial > DBMSs support all the levels, but column-level privilege is hitherto > unaddressed in the PostgreSQL, and this patch try to implement it.> > What this patch have done:> 1. The execution of GRANT/REVOKE for column privileges. Now only > INSERT/UPDATE/REFERENCES privileges are supported, as SQL92 specified. > SELECT privilege is now not supported. This part includes:> 1.1 Add a column named 'attrel' in pg_attribute catalog to store > column privileges. Now all column privileges are stored, no matter > whether they could be implied from table-level privilege.> 1.2 Parser for the new kind of GRANT/REVOKE commands.> 1.3 Execution of GRANT/REVOKE for column privileges. Corresponding > column privileges will be added/removed automatically if no column is > specified, as SQL standard specified.> 2. Column-level privilege check.> Now for UPDATE/INSERT/REFERENCES privilege, privilege check will be > done ONLY on column level. Table-level privilege check was done in the > function InitPlan. Now in this patch, these three kind of privilege are > checked during the parse phase.> 2.1 For UPDATE/INSERT commands. Privilege check is done in the > function transformUpdateStmt/transformInsertStmt.> 2.2 For REFERENCES, privilege check is done in the function > ATAddForeignKeyConstraint. This function will be called whenever a > foreign key constraint is added, like create table, alter table, etc.> 2.3 For COPY command, INSERT privilege is check in the function > DoCopy. SELECT command is checked in DoCopy too.> 3. While adding a new column to a table using ALTER TABLE command, set > appropriate privilege for the new column according to privilege already > granted on the table.> 4. Allow pg_dump and pg_dumpall to dump in/out column privileges.> 5. Add a column named objsubid in pg_shdepend catalog to record ACL > dependencies between column and roles.> 6. modify the grammar of ECPG to support column level privileges.> 7. change psql's \z (\dp) command to support listing column privileges > for tables and views. If \z(\dp) is run with a pattern, column > privileges are listed after table level privileges.> 8. Regression test for column-level privileges. I changed both > privileges.sql and expected/privileges.out, so regression check is now > all passed.> > Best wishes> Dong> -- > Guodong Liu> Database Lab, School of EECS, Peking University> Room 314, Building 42, Peking University, Beijing, 100871, China> > 
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