J. King
2 years ago
2 changed files with 186 additions and 16 deletions
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-- SPDX-License-Identifier: MIT |
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-- Copyright 2017 J. King, Dustin Wilson et al. |
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-- See LICENSE and AUTHORS files for details |
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-- Create a temporary table mapping old article IDs to new article IDs per-user. |
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-- Any articles which have only one subscription will be unchanged, which will |
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-- limit the amount of disruption |
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create table arsse_articles_map( |
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article bigint not null, |
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subscription bigint not null, |
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id bigserial primary key |
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); |
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alter sequence arsse_articles_map_id_seq restart with (select max(id) + 1 from arsse_articles); |
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insert into arsse_articles_map(article, subscription) |
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select |
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a.id as article, |
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s.id as subscription |
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from arsse_articles as a join arsse_subscriptions as s using(feed) |
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where feed in ( |
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select feed from (select feed, count(*) as count from arsse_subscriptions group by feed) as c where c.count > 1 |
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); |
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insert into arsse_articles_map(article, subscription, id) |
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select |
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a.id as article, |
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s.id as subscription, |
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a.id as id |
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from arsse_articles as a join arsse_subscriptions as s using(feed) |
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where feed in ( |
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select feed from (select feed, count(*) as count from arsse_subscriptions group by feed) as c where c.count = 1 |
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); |
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-- First create the subsidiary table to hold article contents |
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create table arsse_article_contents( |
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-- contents of articles, which is typically large text |
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id bigint primary key references arsse_articles(id) on delete cascade on update cascade, |
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content text collate "und-x-icu" |
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); |
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insert into arsse_article_contents |
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select |
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m.id, |
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coalesce(a.content_scraped, a.content) |
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from arsse_articles_map as m |
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left join arsse_articles as a on a.id = m.article; |
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-- Drop the two content columns from the article table as they are no longer needed |
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alter table arsse_articles drop column content; |
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alter table arsse_articles drop column content_scraped; |
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-- Add any new columns required for the articles table |
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alter table arsse_articles add column subscription bigint references arsse_subscriptions(id) on delete cascade on update cascade; |
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alter table arsse_articles add column read smallint not null default 0; |
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alter table arsse_articles add column starred smallint not null default 0; |
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alter table arsse_articles add column hidden smallint not null default 0; |
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alter table arsse_articles add column marked timestamp(0) without time zone; |
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alter table arsse_articles add column note text collate "und-x-icu" not null default ''; |
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-- Populate the articles table with new information; this either inserts or updates in-place |
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insert into arsse_articles(id,feed,subscription,read,starred,hidden,published,edited,modified,marked,url,title,author,guid,url_title_hash,url_content_hash,title_content_hash,note) |
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select |
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i.id, |
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a.feed, |
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i.subscription, |
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coalesce(m.read,0), |
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coalesce(m.starred,0), |
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coalesce(m.hidden,0), |
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a.published, |
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a.edited, |
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a.modified, |
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m.modified, |
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a.url, |
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a.title, |
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a.author, |
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a.guid, |
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a.url_title_hash, |
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a_url_content_hash, |
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a.title_content_hash, |
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coalesce(m.note,'') |
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from arsse_articles_map as i |
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left join arsse_articles as a on a.id = i.article |
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left join arsse_marks as m on a.id = m.article; |
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on conflict do update set (id,feed,subscription,read,starred,hidden,published,edited,modified,marked,url,title,author,guid,url_title_hash,url_content_hash,title_content_hash,note) = row; |
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-- Create one edition for each renumbered article |
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insert into arsse_editions(article) select id from arsse_articles_map where id <> article; |
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-- Create enclures for renumbered articles |
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insert into arsse_enclosures(article, url, type) |
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select |
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m.id, url, type |
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from arsse_articles_map as m |
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join arsse_enclosures as e on m.article = e.article |
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where m.id <> m.article; |
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-- Create categories for renumbered articles |
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insert into arsse_categories(article, name) |
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select |
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m.id, name |
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from arsse_articles_map as m |
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join arsse_categories as c on m.article = c.article |
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where m.id <> m.article; |
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-- Drop the subscription column from the label members table as it is no longer needed (there is now a direct link between articles and subscriptions) |
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alter table arsse_label_members drop column subscription; |
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-- Create label associations for renumbered articles |
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insert into arsse_label_members |
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select |
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label, m.id, assigned, l.modified |
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from arsse_articles_map as m |
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join arsse_label_members as l using(article) |
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where m.id <> m.article; |
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-- Clean up the articles table: delete obsolete rows, add necessary constraints on new columns which could not be satisfied before inserting information, and drop the obsolete feed column |
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delete from arsse_articles where id in (select article from arsse_articles_map where id <> article); |
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alter table arsse_articles alter column subscription set not null; |
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alter table arsse_articles drop column feed; |
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-- Add feed-related columns to the subscriptions table |
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alter table arsse_subscriptions add column url text; |
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alter table arsse_subscriptions add column feed_title text collate "und-x-icu"; |
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alter table arsse_subscriptions add column etag text not null default ''; |
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alter table arsse_subscriptions add column last_mod timestamp(0) without time zone; |
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alter table arsse_subscriptions add column next_fetch timestamp(0) without time zone; |
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alter table arsse_subscriptions add column updated timestamp(0) without time zone; |
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alter table arsse_subscriptions add column source text; |
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alter table arsse_subscriptions add column err_count bigint not null default 0; |
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alter table arsse_subscriptions add column err_msg text collate "und-x-icu"; |
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alter table arsse_subscriptions add column size bigint not null default 0; |
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alter table arsse_subscriptions add column icon bigint references arsse_icons(id) on delete set null; |
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-- Populate the new columns |
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update arsse_subscriptions as s set |
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url = f.url, |
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feed_title = f.title, |
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last_mod = f.modified, |
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etag = f.etag, |
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next_fetch = f.next_fetch, |
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source = f.source, |
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updated = f.updated, |
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err_count = f.err_count, |
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err_msg = f.err_msg, |
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size = f.size, |
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icon = f.icon |
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from arsse_feeds as f |
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where s.feed = f.id; |
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-- Clean up the subscriptions table: add necessary constraints on new columns which could not be satisfied before inserting information, and drop the now obsolete feed column |
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alter table arsse_subscriptions alter column url set not null; |
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alter table arsse_subscriptions add unique(owner,url); |
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alter table arsse_subscriptions drop column feed; |
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-- Delete unneeded table |
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drop table arsse_articles_map; |
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drop table arsse_marks; |
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drop table arsse_feeds; |
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-- set version marker |
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update arsse_meta set value = '8' where "key" = 'schema_version'; |
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