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| -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 f4656adf96..cd6c50903a 100644 --- a/docs/ref/databases.txt +++ b/docs/ref/databases.txt @@ -699,6 +699,22 @@ 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 c2a3430c2b..e2a502cf25 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`` ----------------- |