[drupal-devel] [feature] generalizing node_rewrite_sql

[chx]

 Project:      Drupal
 Version:      cvs
 Component:    database system
 Category:     feature requests
 Priority:     normal
 Assigned to:  chx
 Reported by:  chx
 Updated by:   chx
 Status:       patch

There have been talks on #drupal about automatizing, and even the
simpler node_rewrite_query was found to be better called by hand. But
this? Automatic mechanism for this -- I think -- is almost impossible. 

chx



Previous comments:
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January 24, 2005 - 19:58 : chx

Attachment: http://drupal.org/files/issues/db_rewrite_sql.patch (7.66 KB)

As I was thinking on the various usages of node_rewrite_sql , it came to
my mind that with very little changes it can be generalized so that any
queries against any table -- not just node -- can be rewritten. I have
moved node_rewrite_sql to database.inc, renamed it db_rewrite_sql,
introduced another necessary parameter, which does not affect the
current (light) usage of node_rewrite_sql. I think the usage is even
clearer now, 'cos I think nid_alias caused some confusion. Now it is
called $primary_table , while the new parameter is called
$primary_key.

What this would be good for? One may want to have permission and
languages for taxonomy terms and vocabularies.

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January 24, 2005 - 23:08 : Dries

I guess it makes sense to go with a generic approach, though it is
difficult to predict how many queries will end up being wrapped in a
call to db_rewrite_sql() ...  Comments?

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January 24, 2005 - 23:28 : Jose A Reyero

I like it!, though I still miss some more info about what the query is
about -the 'hints' stuff- , but it's fine... :-)

But also think there should be some kind of 'guidelines' about wrapping
specific queries or not. For the moment, my candidates are:

- node queries, which means 'queries that select lists of nodes', not
any query which contains 'node'
- taxonomy queries, same here, 'queries that select lists of
vocabularies/terms'

Both types of queries above are good candidates for joining permissions
conditions, and maybe language conditions (i18n).

And maybe more in the future.... we'll see.




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January 24, 2005 - 23:41 : chx

Attachment: http://drupal.org/files/issues/db_rewrite_sql_0.patch (7.68 KB)

A through test showed that introducing the $primary_key parameter was
done incorrectly, thus the new version. 

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January 24, 2005 - 23:43 : moshe weitzman

I'm confusd about who is responsible for calling the rewrite function.
Does it not make sense to run every query through this system (and thus
insert a call into db_query). We already do this for prefixes. perhaps
the hook is too performance draining?

Note that the rewrite sql() hook is not documented on the hooks page:
http://drupaldocs.org/api/head/group/hooks. One would document it by
editing
http://cvs.drupal.org/viewcvs/contrib/contributions/docs/developer/hooks/

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Edit: http://drupal.org/project/comments/add/16111