ee93be80c0
* removed old migrations * improve SimpleMigration * fixed migration tests * fixed redundant whitespace * add ToV13 migration which removes bloom groups * bump CURRENT_VERSION of db
65 lines
1.6 KiB
Rust
65 lines
1.6 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Database migrations.
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extern crate migration;
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use migration::{ChangeColumns, SimpleMigration};
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/// The migration from v10 to v11.
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/// Adds a column for node info.
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pub const TO_V11: ChangeColumns = ChangeColumns {
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pre_columns: Some(6),
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post_columns: Some(7),
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version: 11,
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};
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/// The migration from v11 to v12.
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/// Adds a column for light chain storage.
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pub const TO_V12: ChangeColumns = ChangeColumns {
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pre_columns: Some(7),
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post_columns: Some(8),
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version: 12,
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};
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#[derive(Default)]
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pub struct ToV13;
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impl SimpleMigration for ToV13 {
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fn columns(&self) -> Option<u32> {
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Some(8)
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}
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fn version(&self) -> u32 {
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13
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}
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fn migrated_column_index(&self) -> Option<u32> {
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// extras!
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Some(3)
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}
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fn simple_migrate(&mut self, key: Vec<u8>, value: Vec<u8>) -> Option<(Vec<u8>, Vec<u8>)> {
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// remove all bloom groups
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if key[0] == 3 {
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None
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} else {
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Some((key, value))
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}
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}
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}
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