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8f3a7cce80
Make use of pragma user_version to store our database schema version. The present schema is now identitifed as 'version 0', which is also the default value for databases on which we never ran the statement 'pragma user_version' before. Only bootstrap the database if it hasn't been bootstrapped yet. Previously, bootstrap SQL statements ran every time osmo-hlr opened the database, and any errors were being ignored in SQL. Instead, we now first run a query which checks whether tables already exist, and only create them if necessary. This change will allow future schema updates to work properly. Prepare for future schema upgrades by adding a new command-line option which enables upgrades. This option defaults to 'false' in order to avoid accidental upgrades. Change-Id: I8aeaa9a404b622657cbc7138106f38aa6ad8d01b Related: OS#2838