{
  "tasks": [
    {
      "id": "1_bug_reports",
      "sql_file": "1_bug_reports.sql",
      "description": "Add hostname, os_user columns and their indexes to bug_reports.",
      "conditions": [
        { "type": "column_not_exists", "table": "bug_reports", "column": "hostname" },
        { "type": "column_not_exists", "table": "bug_reports", "column": "os_user" },
        { "type": "index_not_exists",  "table": "bug_reports", "index": "idx_hostname" },
        { "type": "index_not_exists",  "table": "bug_reports", "index": "idx_os_user" }
      ]
    },
    {
      "id": "2_users",
      "sql_file": "2_users.sql",
      "description": "Add enabled column to user table.",
      "conditions": [
        { "type": "column_not_exists", "table": "user", "column": "enabled" }
      ]
    }
  ]
}