Add support for view, sequence, column & function privileges

[biodevc]

Currently only TABLE privileges (aka roles, permissions) are handled.

This adds support for VIEWS, SEQUENCES, COLUMNS & FUNCTIONS.

[biodevc]

I just saw that @michaelbeaumont had done the groundwork for function privs so copied and tweaked his query.
It should address #djrobstep/migra#64

[provokateurin]

Could you also add schema privileges? They are missing too.

[provokateurin]

I implemented the schema privileges. @biodevc could you pickup stack11@2107f08 in your PR?

[biodevc]

I implemented the schema privileges. @biodevc could you pickup stack11@2107f08 in your PR?

Just added your mods but altered the query since it was producing wierd results for me

[provokateurin]

Huh what results? We've been using this patch in production and it always worked for us.

[biodevc]

Huh what results? We've been using this patch in production and it always worked for us.

If a role has 'group' members and that role has priveleges granted to a schema, then with your query, all members of the role also get granted priveleges to the schema. So, it "works", but if a member is later removed from the top level role, they'll still have access to the schema.

[provokateurin]

@biodevc could you rebase?

[joshainglis]

A small change that is worth adding to this PR for function privileges to work (needs to include the function signature)
joshainglis@14a1d7a

[biodevc]

@biodevc could you rebase?

I've given up hope of this pull request ever going anywhere. Migra appears to be a dead project at this stage.

[provokateurin]

yeah :( but i thought i saw a post somewhere about the maintainer working on these projects again.