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// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package deltas
import (
"context"
"database/sql"
"fmt"
)
func UpFixSequences(ctx context.Context, tx *sql.Tx) error {
_, err := tx.ExecContext(ctx, `
-- We need to delete all of the existing receipts because the indexes
-- will be wrong, and we'll get primary key violations if we try to
-- reuse existing stream IDs from a different sequence.
DELETE FROM syncapi_receipts;
-- Use the new syncapi_receipts_id sequence.
CREATE SEQUENCE IF NOT EXISTS syncapi_receipt_id;
ALTER SEQUENCE IF EXISTS syncapi_receipt_id RESTART WITH 1;
ALTER TABLE syncapi_receipts ALTER COLUMN id SET DEFAULT nextval('syncapi_receipt_id');
`)
if err != nil {
return fmt.Errorf("failed to execute upgrade: %w", err)
}
return nil
}
func DownFixSequences(ctx context.Context, tx *sql.Tx) error {
_, err := tx.ExecContext(ctx, `
-- We need to delete all of the existing receipts because the indexes
-- will be wrong, and we'll get primary key violations if we try to
-- reuse existing stream IDs from a different sequence.
DELETE FROM syncapi_receipts;
-- Revert back to using the syncapi_stream_id sequence.
DROP SEQUENCE IF EXISTS syncapi_receipt_id;
ALTER TABLE syncapi_receipts ALTER COLUMN id SET DEFAULT nextval('syncapi_stream_id');
`)
if err != nil {
return fmt.Errorf("failed to execute downgrade: %w", err)
}
return nil
}
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