src/site/sphinx/databases/sybase.rst

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.. _`SQL Server`: http://www.sybase.com/products/archivedproducts/sqlserver
.. _`Adaptive Server Enterprise`: http://www.sybase.com/products/databasemanagement/adaptiveserverenterprise
.. _`Documentation search`: http://sybooks.sybase.com/nav/base.do
.. _`Documentation archive`: http://sybooks.sybase.com/nav/base.do?archive=1

Sybase
======

DdlUtils supports the Sybase products `SQL Server`_ from version 10.0 on, and
`Adaptive Server Enterprise`_ from version 11.5 on. The Sybase documentation for old versions
can be found in the `Documentation archive`_. The manuals for the current versions can be
found via the `Documentation search`_.

Constraints
-----------

Platform identifier
  ``Sybase``

Recognized JDBC drivers
  | ``com.sybase.jdbc2.jdbc.SybDriver``
  | ``com.sybase.jdbc.SybDriver``

Recognized JDBC sub protocols
  ``jdbc:sybase:Tds``

Supports SQL comments
  yes

Supports delimited identifiers
  yes

Maximum identifier length
  28

Supports default values for ``LONG`` types
  yes

Supports non-unique indices
  yes

Supports non-primary key columns as identity columns
  yes

Allows ``INSERT``/``UPDATE`` statements to set values for identity columns
  yes

DdlUtils uses sequences for identity columns
  no

DdlUtils can read back the auto-generated value of an identity column
  yes

DdlUtils can create a database via JDBC
  no

DdlUtils can drop a database via JDBC
  no

Datatypes
---------

+-----------------+--------------------------------+---------------------------------------------+
|JDBC Type        |Database Type                   |Additional comments                          |
+=================+================================+=============================================+
|``ARRAY``        |``IMAGE``                       |Will be read back as ``LONGVARBINARY``       |
+-----------------+--------------------------------+---------------------------------------------+
|``BIGINT``       |``DECIMAL(19,0)``               |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``BINARY``       |``BINARY``                      |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``BIT``          |``SMALLINT``                    |The native ``BIT`` type is rather limited    |
|                 |                                |(cannot be NULL, cannot be indexed), hence   |
|                 |                                |DdlUtils uses ``SMALLINT`` instead. Will be  |
|                 |                                |read back as ``SMALLINT``                    |
+-----------------+--------------------------------+---------------------------------------------+
|``BLOB``         |``IMAGE``                       |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``BOOLEAN``      |``SMALLINT``                    |The native ``BIT`` type is rather limited    |
|                 |                                |(cannot be NULL, cannot be indexed), hence   |
|                 |                                |DdlUtils uses ``SMALLINT`` instead. Will be  |
|                 |                                |read back as ``SMALLINT``                    |
+-----------------+--------------------------------+---------------------------------------------+
|``CHAR``         |``CHAR``                        |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``CLOB``         |``TEXT``                        |Will be read back as ``LONGVARCHAR``         |
+-----------------+--------------------------------+---------------------------------------------+
|``DATALINK``     |``IMAGE``                       |Will be read back as ``LONGVARBINARY``       |
+-----------------+--------------------------------+---------------------------------------------+
|``DATE``         |``DATETIME``                    |Will be read back as ``TIMESTAMP``           |
+-----------------+--------------------------------+---------------------------------------------+
|``DECIMAL``      |``DECIMAL``                     |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``DISTINCT``     |``IMAGE``                       |Will be read back as ``LONGVARBINARY``       |
+-----------------+--------------------------------+---------------------------------------------+
|``DOUBLE``       |``DOUBLE PRECISION``            |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``FLOAT``        |``DOUBLE PRECISION``            |Will be read back as ``FLOAT``               |
+-----------------+--------------------------------+---------------------------------------------+
|``INTEGER``      |``INT``                         |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``JAVA_OBJECT``  |``IMAGE``                       |Will be read back as ``LONGVARBINARY``       |
+-----------------+--------------------------------+---------------------------------------------+
|``LONGVARBINARY``|``IMAGE``                       |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``LONGVARCHAR``  |``TEXT``                        |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``NULL``         |``IMAGE``                       |Will be read back as ``LONGVARBINARY``       |
+-----------------+--------------------------------+---------------------------------------------+
|``NUMERIC``      |``NUMERIC``                     |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``OTHER``        |``IMAGE``                       |Will be read back as ``LONGVARBINARY``       |
+-----------------+--------------------------------+---------------------------------------------+
|``REAL``         |``REAL``                        |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``REF``          |``IMAGE``                       |Will be read back as ``LONGVARBINARY``       |
+-----------------+--------------------------------+---------------------------------------------+
|``SMALLINT``     |``SMALLINT``                    |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``STRUCT``       |``IMAGE``                       |Will be read back as ``LONGVARBINARY``       |
+-----------------+--------------------------------+---------------------------------------------+
|``TIME``         |``DATETIME``                    |Will be read back as ``TIMESTAMP``           |
+-----------------+--------------------------------+---------------------------------------------+
|``TIMESTAMP``    |``DATETIME``                    |Will be read back as ``TIMESTAMP``           |
+-----------------+--------------------------------+---------------------------------------------+
|``TINYINT``      |``SMALLINT``                    |The native ``TINYINT`` type only supports    |
|                 |                                |values between 0 and 255.  Will be read back |
|                 |                                |as ``SMALLINT``                              |
+-----------------+--------------------------------+---------------------------------------------+
|``VARBINARY``    |``VARBINARY``                   |                                             |
+-----------------+--------------------------------+---------------------------------------------+
|``VARCHAR``      |``VARCHAR``                     |                                             |
+-----------------+--------------------------------+---------------------------------------------+