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Support for database schema version ranges (#9933)

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This is essentially an implementation of the proposal made at https://hackmd.io/@richvdh/BJYXQMQHO, though the details have ended up looking slightly different.
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Richard van der Hoff 2021-06-11 14:45:53 +01:00 • committed by GitHub
parent a14884fbb0
commit c1b9922498
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7 changed files with 207 additions and 78 deletions
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synapse/storage/schema/common/schema_version.sql
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@ -20,6 +20,13 @@ CREATE TABLE IF NOT EXISTS schema_version(
CHECK (Lock='X')
);
CREATE TABLE IF NOT EXISTS schema_compat_version(
Lock CHAR(1) NOT NULL DEFAULT 'X' UNIQUE, -- Makes sure this table only has one row.
-- The SCHEMA_VERSION of the oldest synapse this database can be used with
compat_version INTEGER NOT NULL,
CHECK (Lock='X')
);
CREATE TABLE IF NOT EXISTS applied_schema_deltas(
version INTEGER NOT NULL,
file TEXT NOT NULL,