mirror of
https://gitlab.com/wgp/dougal/software.git
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0ca44c3861
NOTE: this is the first time we modify the actual data in the database, as opposed to adding to the schema.
85 lines
2.4 KiB
PL/PgSQL
85 lines
2.4 KiB
PL/PgSQL
-- Upgrade the database from commit 83be83e4 to 53ed096e.
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--
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-- New schema version: 0.2.0
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--
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-- ATTENTION:
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--
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-- ENSURE YOU HAVE BACKED UP THE DATABASE BEFORE RUNNING THIS SCRIPT.
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--
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--
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-- NOTE: This upgrade affects all schemas in the database.
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-- NOTE: Each application starts a transaction, which must be committed
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-- or rolled back.
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--
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-- This migrates the file hashes to address issue #173.
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-- The new hashes use size, modification time, creation time and the
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-- first half of the MD5 hex digest of the file's absolute path.
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--
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-- It's a minor (rather than patch) version number increment because
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-- changes to `bin/datastore.py` mean that the data is no longer
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-- compatible with the hashing function.
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--
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-- To apply, run as the dougal user:
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--
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-- psql <<EOF
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-- \i $THIS_FILE
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-- COMMIT;
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-- EOF
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--
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-- NOTE: It can take a while if run on a large database.
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-- NOTE: It can be applied multiple times without ill effect.
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BEGIN;
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CREATE OR REPLACE PROCEDURE show_notice (notice text) AS $$
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BEGIN
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RAISE NOTICE '%', notice;
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END;
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$$ LANGUAGE plpgsql;
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CREATE OR REPLACE PROCEDURE migrate_hashes (schema_name text) AS $$
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BEGIN
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RAISE NOTICE 'Migrating schema %', schema_name;
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-- We need to set the search path because some of the trigger
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-- functions reference other tables in survey schemas assuming
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-- they are in the search path.
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EXECUTE format('SET search_path TO %I,public', schema_name);
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EXECUTE format('UPDATE %I.files SET hash = array_to_string(array_append(trim_array(string_to_array(hash, '':''), 1), left(md5(path), 16)), '':'')', schema_name);
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EXECUTE 'SET search_path TO public'; -- Back to the default search path for good measure
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END;
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$$ LANGUAGE plpgsql;
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CREATE OR REPLACE PROCEDURE upgrade_10 () AS $$
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DECLARE
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row RECORD;
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BEGIN
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FOR row IN
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SELECT schema_name FROM information_schema.schemata
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WHERE schema_name LIKE 'survey_%'
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ORDER BY schema_name
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LOOP
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CALL migrate_hashes(row.schema_name);
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END LOOP;
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END;
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$$ LANGUAGE plpgsql;
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CALL upgrade_10();
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CALL show_notice('Cleaning up');
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DROP PROCEDURE migrate_hashes (schema_name text);
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DROP PROCEDURE upgrade_10 ();
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CALL show_notice('Updating db_schema version');
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INSERT INTO public.info VALUES ('version', '{"db_schema": "0.2.0"}')
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ON CONFLICT (key) DO UPDATE
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SET value = public.info.value || '{"db_schema": "0.2.0"}' WHERE public.info.key = 'version';
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CALL show_notice('All done. You may now run "COMMIT;" to persist the changes');
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DROP PROCEDURE show_notice (notice text);
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--
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--NOTE Run `COMMIT;` now if all went well
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--
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