Ensembl/ensembl-hive

-- ---------------------------------------------------------------------------------------------------

SET @expected_version = 69;

    -- make MySQL stop immediately after it encounters division by zero:
SET SESSION sql_mode='TRADITIONAL';

    -- warn that we detected the schema version mismatch:
SELECT CONCAT(  'The patch only applies to schema version ',
                @expected_version,
                ', but the current schema version is ',
                meta_value,
                ', so skipping the rest.') AS ''
    FROM hive_meta WHERE meta_key='hive_sql_schema_version' AND meta_value<>@expected_version;

    -- cause division by zero only if current version differs from the expected one:
INSERT INTO hive_meta (meta_key, meta_value)
    SELECT 'this_should_never_be_inserted', 1 FROM hive_meta WHERE NOT 1/(meta_key<>'hive_sql_schema_version' OR meta_value=@expected_version);

SELECT CONCAT(  'The patch seems to be compatible with schema version ',
                @expected_version,
                ', applying the patch...') AS '';

    -- Now undo the change so that we could patch potentially non-TRADITIONAL schema:
SET SESSION sql_mode='';

-- ----------------------------------<actual_patch> -------------------------------------------------

CREATE OR REPLACE VIEW live_roles AS
    SELECT w.meadow_user, w.meadow_type, w.resource_class_id, rc.name resource_class_name, r.analysis_id, a.logic_name, count(*)
    FROM worker w
    JOIN role r USING(worker_id)
    LEFT JOIN resource_class rc ON w.resource_class_id=rc.resource_class_id
    LEFT JOIN analysis_base a USING(analysis_id)
    WHERE r.when_finished IS NULL
    GROUP BY w.meadow_user, w.meadow_type, w.resource_class_id, rc.name, r.analysis_id, a.logic_name;

-- ----------------------------------</actual_patch> -------------------------------------------------


    -- increase the schema version by one:
UPDATE hive_meta SET meta_value=meta_value+1 WHERE meta_key='hive_sql_schema_version';