add parent_feed column to ttrss_feeds, create upgrade script for 1.1.1, move out old scripts to schema/obsolete

schema/ttrss_schema_mysql.sql

@@ -54,10 +54,13 @@ create table ttrss_feeds (id integer not null auto_increment primary key,
 	site_url varchar(250) not null default '',
 	auth_login varchar(250) not null default '',
 	auth_pass varchar(250) not null default '',
+	parent_feed integer default null,
 	index(owner_uid),
 	foreign key (owner_uid) references ttrss_users(id) ON DELETE CASCADE,
 	index(cat_id),
-	foreign key (cat_id) references ttrss_feed_categories(id)) TYPE=InnoDB;
+	foreign key (cat_id) references ttrss_feed_categories(id),
+	index(parent_feed),
+	foreign key (parent_feed) references ttrss_feeds(id) ON DELETE SET NULL) TYPE=InnoDB;
 
 insert into ttrss_feeds (owner_uid,title,feed_url) values (1,'Footnotes', 'http://gnomedesktop.org/node/feed');
 insert into ttrss_feeds (owner_uid,title,feed_url) values (1,'Latest Linux Kernel Versions','http://kernel.org/kdist/rss.xml');

schema/ttrss_schema_pgsql.sql

@@ -49,6 +49,7 @@ create table ttrss_feeds (id serial not null primary key,
 	last_error text not null default '',
 	site_url varchar(250) not null default '',
 	auth_login varchar(250) not null default '',
+	parent_feed integer default null references ttrss_feeds(id) on delete set null,
 	auth_pass varchar(250) not null default '');	
 
 create index ttrss_feeds_owner_uid_index on ttrss_feeds(owner_uid);

schema/upgrade-1.1.1-1.1.2-mysql.sql

@@ -0,0 +1,6 @@
+begin;
+
+alter table ttrss_feeds add column parent_feed integer;
+alter table ttrss_feeds add foreign key (parent_feed) references ttrss_feeds(id) on delete set null;
+
+commit;

schema/upgrade-1.1.1-1.1.2-pgsql.sql

@@ -0,0 +1,6 @@
+begin;
+
+alter table ttrss_feeds add column parent_feed integer;
+alter table ttrss_feeds add foreign key (parent_feed) references ttrss_feeds(id) on delete set null;
+
+commit;