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Reduce divergency between oracle and postgres codebase

Add missing new xql file

Reduce divergence between postgres and oracle codebase

Reduce divergence between oracle and postgres codebase

Reduce divergence between postgres and oracle codebase

Ehm... reintroduce dual for oracle compliance

Use dual for oracle compliance

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    /openacs-4/packages/news/www/index.xql
Add dual for oracle compliance

Reduce divergency between oracle and postgres codebase

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    /openacs-4/packages/news/www/admin/process-2.xql
Reduce divergency between oracle and postgres codebase

Use tcl to do date calculations instead of db, reduce postgres/oracle divergencies

Reduce divergence between oracle and postgres codebase, optimize queries

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    /openacs-4/packages/news/www/index-oracle.xql
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    /openacs-4/packages/news/www/index.tcl
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    /openacs-4/packages/news/www/index.xql
Do date calculations in tcl rather than in db, reduce oracle and postgres divergency

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    /openacs-4/packages/news/www/item-create.tcl
Reduce divergence between oracle and postgres code

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    /openacs-4/packages/news/lib/latest-news.tcl
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    /openacs-4/packages/news/lib/latest-news.xql
Reduce oracle/postgres divergence

Uniform sql codebase

Use cached api instead of query to retrieve node id from community and community_type

Remove unused query from xql (no usage was found upstream and on Learn@WU)

Get rid of dual idiom

Oracle doesn't support limit :-|

Streamline and optimize idiom

Declare explicitly the only column we need in a way that DBMS can create a better query plan

Tolerate the same request variable specified multiple times

We use export_vars as arbiter to decide how this will be treated.

Also remove some postgres/oracle divergence

Replace db date conversion with tcl one, remove unneded statements (sort_by is already defined in page contract, ad_return_template is implicit)

Fix typo

Port downstream only usage of reading info api

Also fix such api so that root message is retrieved for every given source message

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    /openacs-4/packages/forums/forums.info
Converge downstream reading_info feature with upstream

Port downstream only idiom to update reading_info table

Make more use of api when retrieving forum and message information

Optimize message existance query

Fix sql update to populate new forum_id column in existing data

Maintenance of forum reading count feature

- removal of forums_reading_info_user (1Mio rows on Learn@WU).

This materialized view had to be constantly synced with

forums_reading_info table. Reimplemented as view.

- simplify logics in stored procedure due to new datamodel

- fix inconsistencies between oracle and postgres function definition

- re-enabled parameter to decide whether use these stats or not in

administration

TODO: consider further reform of this feature as stats grow very

large on busy sites for probably little value added

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    /openacs-4/packages/forums/forums.info
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    /openacs-4/packages/forums/tcl/forums-procs.tcl
Remove deprecated idioms and unneded queries