[mirrorbrain-commits] [opensuse-svn] r6649 - in trunk/tools/download-redirector-v2/sql: . migrations

Author: poeml
Date: 2009-03-02 04:44:47 -0700 (Mon, 02 Mar 2009)
New Revision: 6649

Added:
   trunk/tools/download-redirector-v2/sql/migrations/
   trunk/tools/download-redirector-v2/sql/migrations/schema-postgresql-upgrade-2.6-2.7.sql
Log:
add directions for upgrading from MB 2.6 to 2.7

Added: trunk/tools/download-redirector-v2/sql/migrations/schema-postgresql-upgrade-2.6-2.7.sql
===================================================================
--- trunk/tools/download-redirector-v2/sql/migrations/schema-postgresql-upgrade-2.6-2.7.sql	                        (rev 0)
+++ trunk/tools/download-redirector-v2/sql/migrations/schema-postgresql-upgrade-2.6-2.7.sql	2009-03-02 11:44:47 UTC (rev 6649)
@@ -0,0 +1,145 @@
+
+CREATE TABLE "filearr" (
+        "id" serial NOT NULL PRIMARY KEY,
+        "path" varchar(512) UNIQUE NOT NULL,
+	"mirrors" smallint[]
+);
+
+-- run the following (shell) command:
+-- createlang plpgsql <dbname>
+
+-- add a mirror to the list of mirrors where a file was seen
+CREATE OR REPLACE FUNCTION mirr_add_byid(arg_serverid integer, arg_fileid integer) RETURNS integer AS $$
+DECLARE
+    arr smallint[];
+BEGIN
+    SELECT INTO arr mirrors FROM filearr WHERE id = arg_fileid;
+    IF arg_serverid = ANY(arr) THEN
+        RAISE DEBUG 'already there -- nothing to do';
+        RETURN 0;
+    ELSE
+        arr := array_append(arr, arg_serverid::smallint);
+        RAISE DEBUG 'arr: %', arr;
+        update filearr set mirrors = arr where id = arg_fileid;
+        return 1;
+    END IF;
+END;
+$$ LANGUAGE 'plpgsql';
+
+
+-- remove a mirror from the list of mirrors where a file was seen
+CREATE OR REPLACE FUNCTION mirr_del_byid(arg_serverid integer, arg_fileid integer) RETURNS integer AS $$
+DECLARE
+    arr smallint[];
+BEGIN
+    SELECT INTO arr mirrors FROM filearr WHERE id = arg_fileid;
+
+    IF NOT arg_serverid = ANY(arr) THEN
+        -- it's not there - nothing to do
+        RAISE DEBUG 'not there -- nothing to do';
+        RETURN 0;
+    ELSE
+        arr := ARRAY(
+                    SELECT arr[i] 
+                    FROM generate_series(array_lower(arr, 1), array_upper(arr, 1)) 
+                    AS i 
+                    WHERE arr[i] <> arg_serverid
+                );
+        RAISE DEBUG 'arr: %', arr;
+        -- update the array in the table
+        -- if arr is empty, we could actually remove the row instead, thus deleting the file
+        UPDATE filearr 
+            SET mirrors = arr WHERE id = arg_fileid;
+        RETURN 1;
+    END IF;
+END;
+$$ LANGUAGE 'plpgsql';
+
+
+-- check whether a given mirror is known to have a file (id)
+CREATE OR REPLACE FUNCTION mirr_hasfile_byid(arg_serverid integer, arg_fileid integer) RETURNS boolean AS $$
+DECLARE
+    result integer;
+BEGIN
+    SELECT INTO result 1 FROM filearr WHERE id = arg_fileid AND arg_serverid = ANY(mirrors);
+    IF result > 0 THEN
+        RETURN true;
+    END IF;
+    RETURN false;
+END;
+$$ LANGUAGE 'plpgsql';
+
+-- check whether a given mirror is known to have a file (name)
+CREATE OR REPLACE FUNCTION mirr_hasfile_byname(arg_serverid integer, arg_path text) RETURNS boolean AS $$
+DECLARE
+    result integer;
+BEGIN
+    SELECT INTO result 1 FROM filearr WHERE path = arg_path AND arg_serverid = ANY(mirrors);
+    IF result > 0 THEN
+        RETURN true;
+    END IF;
+    RETURN false;
+END;
+$$ LANGUAGE 'plpgsql';
+
+
+CREATE OR REPLACE FUNCTION mirr_add_bypath(arg_serverid integer, arg_path text) RETURNS integer AS $$
+DECLARE
+    fileid integer;
+    arr smallint[];
+BEGIN
+    SELECT INTO fileid, arr
+        id, mirrors FROM filearr WHERE path = arg_path;
+
+    -- There are three cases to handle, and we want to handle each of them
+    -- with the minimal effort.
+    -- In any case, we return a file id in the end.
+    IF arg_serverid = ANY(arr) THEN
+        RAISE DEBUG 'nothing to do';
+    ELSIF fileid IS NULL THEN
+        RAISE DEBUG 'creating entry for new file.';
+        INSERT INTO filearr (path, mirrors) VALUES (arg_path, ARRAY[arg_serverid]);
+        fileid := currval('filearr_id_seq');
+    ELSE
+        RAISE DEBUG 'update existing file entry (id: %)', fileid;
+        arr := array_append(arr, arg_serverid::smallint);
+        update filearr set mirrors = arr where id = fileid;
+    END IF;
+
+    RETURN fileid;
+EXCEPTION
+    WHEN unique_violation THEN
+        RAISE NOTICE 'file % was just inserted by somebody else', arg_path;
+        -- just update it by calling ourselves again
+        SELECT into fileid mirr_add_bypath(arg_serverid, arg_path);
+        RETURN fileid;
+END;
+$$ LANGUAGE 'plpgsql';
+
+
+
+CREATE OR REPLACE FUNCTION mirr_get_name(integer) RETURNS text AS '
+    SELECT identifier FROM server WHERE id=$1
+' LANGUAGE 'SQL';
+
+
+CREATE OR REPLACE FUNCTION mirr_get_name(ids smallint[]) RETURNS text[] AS $$
+DECLARE
+    names text[];
+    -- i integer;
+BEGIN
+    names := ARRAY(
+                  select mirr_get_name(cast(ids[i] AS integer)) from generate_series(array_lower(ids, 1), array_upper(ids, 1)) as i
+                  );
+    RETURN names;
+END;
+$$ LANGUAGE 'plpgsql';
+
+
+-- now, fill the new database by scanning
+-- restart Apache with the mod_mirrorbrain 2.7 module
+-- verify that everything works
+
+drop function from_unixtime(integer);
+drop table file_server cascade;
+drop table file;

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