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/* Copyright 2015 OpenMarket Ltd
*
* 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.
*/
CREATE TABLE IF NOT EXISTS schema_version(
Lock char(1) NOT NULL DEFAULT 'X', -- Makes sure this table only has one row.
version INTEGER NOT NULL,
upgraded BOOL NOT NULL, -- Whether we reached this version from an upgrade or an initial schema.
CONSTRAINT schema_version_lock_x CHECK (Lock='X')
CONSTRAINT schema_version_lock_uniq UNIQUE (Lock)
);
CREATE TABLE IF NOT EXISTS schema_deltas(
version INTEGER NOT NULL,
file TEXT NOT NULL,
CONSTRAINT schema_deltas_ver_file UNIQUE (version, file) ON CONFLICT IGNORE
);
CREATE INDEX IF NOT EXISTS schema_deltas_ver ON schema_deltas(version);
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