OpenACS / openacs-4 / packages / acs-content-repository / sql / postgresql

content-item.sql

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Last Commit: 17 May
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Total Lines of Code (LoC): 2,466
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Saturday 21 Dec 2002
11:27 pm

bartt

Patches to make OpenACS PG 7.3 compatible.

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Saturday 25 May 2002
4:30 pm

yon

removed content_item.update_last_modified, use acs_object.update_last_modified instead

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Thursday 04 Apr 2002
5:00 am

yon

added function for updating last_modified time of a content_item with cascading

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Sunday 10 Feb 2002
11:11 pm

neophytosd

applied patches 130,131,132,133,134,135,137

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Sunday 09 Dec 2001
5:21 am

donb

Added code to make use of David Walker's wonderfully abusive hack on the

pg_proc table that showed me how to write recursive SQL functions. We now

have good use of the index on tree_sortkey when climbing the tree, woo-hoo!

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Saturday 08 Dec 2001
2:17 am

donb

Changed the representation of tree_sortkeys from "text" to "bit varying".

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Saturday 01 Dec 2001
4:41 pm

donb

After importing openacs.org users, forums and messages I discovered that it

took literally several minutes to load the APM's home page. This was due

to a rather stupid subselect of the form:

select count(*)

from content_revisions r

where r.revision_id = content_item.get_latest_revision(item_id)

where item_id comes from the package versions table.

It's stupid in both PG and Oracle because get_latest_revision already

joins the latest_revision_id value from cr_items with the content

revisions table thus a simple check for a null return by get_latest_revision

would be sufficient.

It's *really* stupid in Oracle because Oracle won't use the index on

revision_id when checking NULLs so we get two sequential scans of the

cr_revisions table tucked into that one itty-bitty subquery (itself called

once for each package version in ths system).

Which explains why I hadn't noticed it while working on scalability testing

in PG - PG uses the index because its btree index structure handles NULLs.

Meaning this query only fell apart at a rate of O(log2(R)) rather than O(R)

as in Oracle (R being the number of revision objects in the system).

My solution was to rewrite the subselect using "case" rather than "count(*)"

and also to speed up get_latest_revision by having it check for NULL and

return NULL immediately rather than execute the query (in PG this is

accomplished by declaring the function "isstrict", and the executor won't

even call the function if the argument's NULL, making it REALLY fast!).

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Thursday 15 Nov 2001
2:47 am

donb

1. Fixed permissions bug in the PG version (missing OR clause in a view)

2. Added (untested thus far) site-wide-search to glossary

3. Added centralized support for importing files into the CR (either into

the filesystem or the database).

4. Fixed wp-slim. Fixed it some more. Fixed it again. It still needs

more fixing.

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Tuesday 23 Oct 2001
9:41 pm

donb

Dave Bauer's patches ...

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Friday 28 Sep 2001
12:48 am

danw

added support for multiple file storage areas

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Wednesday 05 Sep 2001
2:09 am

danw

fixed definition of item relationships

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Thursday 30 Aug 2001
6:01 am

danw

fixed insertion order for insert statement in content_revision__copy routine

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3:46 am

danw

fixed image upload using lobs and file storage in CR

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Tuesday 28 Aug 2001
3:07 am

danw

modified content_item__get_path to match oracle version

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Saturday 25 Aug 2001
4:22 pm

danw

removed circular dependency due to workflow

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Friday 24 Aug 2001
12:50 am

danw

fixed get_path to match oracle version

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Thursday 23 Aug 2001
4:26 am

danw

fixed exception message in content_type__drop_attribute

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Tuesday 17 Jul 2001
1:46 am

danw

patch supplied by Dave Bauer to pass in security_inherit_p flag when creating new content_item. Work-around for data-change violation

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Friday 06 Jul 2001
2:23 am

danw

workaround for content_item__delete problem related to pg RI problems

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Thursday 14 Jun 2001
2:23 am

danw

various bugfixes

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Saturday 09 Jun 2001
3:06 am

danw

more cleanup

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Friday 08 Jun 2001
3:52 am

danw

fixed a few pl/sql procs

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Thursday 07 Jun 2001
2:04 am

danw

fixed tree query

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Sunday 13 May 2001
3:55 am

danw

moved content repository job scheduling from oracle to aolsrver, that it is compatible with postgresql

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Monday 30 Apr 2001
10:04 pm

stevew

Add content_item__get_title(integer) helper function

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3:34 am

danw

added file support to CR data-model

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Saturday 28 Apr 2001
9:58 pm

donb

Removed more of the "default '' not null" kludge.

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Thursday 19 Apr 2001
3:17 am

danw

more strict string handling changes

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1:27 am

danw

added comments for default parameters

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Thursday 05 Apr 2001
1:56 am

danw

finished porting and testing content-test.sql

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