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1 .. _db-versioning:
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2
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3 Database versioning
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4 ===================
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5
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6 Orthanc stores the index of the DICOM instances as an embedded `SQLite
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7 database <http://www.sqlite.org/>`_. The schema of this database has
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8 evolved across the versions of Orthanc, making the database
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9 incompatible between versions. This page clarifies which versions of
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10 Orthanc are compatible with other versions.
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11
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12 Recent versions (post-0.3.1)
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13 ----------------------------
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14
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15 Recent versions of Orthanc (starting 0.3.1, inclusive) include
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16 information about the version of the DB schema in the SQLite table
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17 ``GlobalProperties`` under the property with index 1. Versions with the
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18 same version of the DB schema are compatible with each other.
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19
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20 When some version of Orthanc starts up, it checks whether it is
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21 compatible with the database version. Orthanc will **fail to start if
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22 it is not compatible with the database version**. Here is the
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23 compatibility matrix:
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24
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25 =============================== ===== ===== ===== ===== =====
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26 Version DB v2 DB v3 DB v4 DB v5 DB v6
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27 =============================== ===== ===== ===== ===== =====
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28 Mainline u u u x
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29 Orthanc 0.9.5 - Orthanc 1.5.7 u u u x
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30 Orthanc 0.8.5 - Orthanc 0.9.4 u u x
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31 Orthanc 0.7.3 - Orthanc 0.8.4 u x
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32 Orthanc 0.4.0 - Orthanc 0.7.2 x
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33 Orthanc 0.3.1 x
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34 =============================== ===== ===== ===== ===== =====
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35
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36 *Note 1:* "u" means that an automatic upgrade of the DB schema is
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37 available, without having to :ref:`migrate the database
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38 <replication>`.
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39
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40 *Note 2:* Starting with Orthanc 0.9.5, the option ``--upgrade`` must be provided
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41 on the command-line to allow Orthanc to upgrade the database schema.
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42
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43
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44 Early versions (pre-0.3.0)
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45 --------------------------
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46
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47 Early versions of Orthanc (up to version 0.3.0, inclusive) **do not
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48 check the version** of the database schema. Because of this, these
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49 early versions are incompatible with all the other versions. Pay
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50 attention to the fact that no compatibility check is done in these
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51 versions, which may result in a corrupted database.
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