diff options
| author | Shai Berger <shai@platonix.com> | 2013-10-21 18:12:48 +0300 |
|---|---|---|
| committer | Shai Berger <shai@platonix.com> | 2013-10-23 15:05:05 +0300 |
| commit | 6de3726423b8df4fb8ab05caa109a8c6308e6060 (patch) | |
| tree | 5efe99bc3ec07fc921b5ad914fb6c67e485c7159 | |
| parent | ead7c496a4bdd0eb8e2282ce982e1292846e7c91 (diff) | |
Fixed #13245: Explained Oracle's behavior w.r.t db_table
and how to prevent table-name truncation
Thanks russellm & timo for discussion, and timo for review.
Backported from master 317040a73b77be8f8210801793b2ce6d1a69301e
| -rw-r--r-- | docs/ref/databases.txt | 16 | ||||
| -rw-r--r-- | docs/ref/models/options.txt | 12 |
2 files changed, 28 insertions, 0 deletions
diff --git a/docs/ref/databases.txt b/docs/ref/databases.txt index dba278bc4f..4c18658304 100644 --- a/docs/ref/databases.txt +++ b/docs/ref/databases.txt @@ -705,6 +705,22 @@ Naming issues Oracle imposes a name length limit of 30 characters. To accommodate this, the backend truncates database identifiers to fit, replacing the final four characters of the truncated name with a repeatable MD5 hash value. +Additionally, the backend turns database identifiers to all-uppercase. + +To prevent these transformations (this is usually required only when dealing +with legacy databases or accessing tables which belong to other users), use +a quoted name as the value for ``db_table``:: + + class LegacyModel(models.Model): + class Meta: + db_table = '"name_left_in_lowercase"' + + class ForeignModel(models.Model): + class Meta: + db_table = '"OTHER_USER"."NAME_ONLY_SEEMS_OVER_30"' + +Quoted names can also be used with Django's other supported database +backends; except for Oracle, however, the quotes have no effect. When running syncdb, an ``ORA-06552`` error may be encountered if certain Oracle keywords are used as the name of a model field or the diff --git a/docs/ref/models/options.txt b/docs/ref/models/options.txt index 9d076f6274..9767ea5f1b 100644 --- a/docs/ref/models/options.txt +++ b/docs/ref/models/options.txt @@ -67,6 +67,18 @@ Django quotes column and table names behind the scenes. the table name via ``db_table``, particularly if you are using the MySQL backend. See the :ref:`MySQL notes <mysql-notes>` for more details. +.. admonition:: Table name quoting for Oracle + + In order to to meet the 30-char limitation Oracle has on table names, + and match the usual conventions for Oracle databases, Django may shorten + table names and turn them all-uppercase. To prevent such transformations, + use a quoted name as the value for ``db_table``:: + + db_table = '"name_left_in_lowercase"' + + Such quoted names can also be used with Django's other supported database + backends; except for Oracle, however, the quotes have no effect. See the + :ref:`Oracle notes <oracle-notes>` for more details. ``db_tablespace`` ----------------- |