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DO $SQL$
DECLARE
rec RECORD;
sql TEXT;
test_ext TEXT;
from_version TEXT;
BEGIN
-- TODO: test all extensions ?
test_ext := 'postgis';
FOR rec IN
SELECT * FROM pg_available_extension_versions
WHERE name = test_ext
AND version NOT LIKE '%next'
AND version NOT IN ( 'unpackaged', 'ANY')
ORDER BY string_to_array(
regexp_replace(version, '[^0-9.]', '', 'g'), '.'
)::int[] DESC
LOOP
IF from_version IS NULL THEN
from_version := rec.version;
sql := format('CREATE EXTENSION %I VERSION %L', test_ext, from_version);
EXECUTE sql;
ELSE
sql := format('ALTER EXTENSION %I UPDATE TO %L', test_ext, rec.version);
BEGIN
EXECUTE sql;
-- expect error like Downgrade of postgis from version 3.4.0dev 3.3.0rc2-808-g6080076af to version 3.3.3dev is forbidden
EXCEPTION WHEN OTHERS THEN
IF SQLERRM LIKE 'Downgrade % is forbidden' THEN
RAISE NOTICE 'PASS: %', SQLERRM;
ELSE
RAISE EXCEPTION 'FAIL: % to % downgrade was not handled: %',
from_version, rec.version, SQLERRM;
END IF;
END;
END IF;
END LOOP;
sql := format('DROP EXTENSION IF EXISTS %I', test_ext);
EXECUTE sql;
END
$SQL$ LANGUAGE 'plpgsql';
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