|
Users can migrate Sybase Transact SQL
objects that are present as script files in the local file system using
Offline Migration. . The scripts files containing the Sybase T-SQL code
can be directly loaded and migrated. The SwisSQL migration engine uses
the Metadata information (information about tables) of the Sybase database
to perform an accurate conversion for some of the statements/syntaxes
to SQL Server T-SQL. For an accurate conversion you have to fetch the
Metadata information of the source Sybase database before loading and
migrating the Sybase scripts. The Meta Data Wizard can help you
load the Metadata information from the source database to be used for
conversion. The sequence of steps to be performed as part of Offline Migration
is given below :
- Invoking the
Meta Data wizard
You can load the required Metadata information
from a Sybase database using the Meta Data Wizard invoked from
the GUI. You can invoke the Meta Data Wizard in any one of
the following ways
- Directly Invoking the Meta Data Wizard:
You can invoke the Meta Data Wizard from
the Product Menu. Select Action -> Get Meta Data or use
the hot keys Ctrl+G to invoke the Meta Data wizard.
- Meta Data Wizard prompted during migration of Sybase scripts
When the user loads the scripts by clicking ADD
button, the tool prompts an option to fetch Metadata before conversion.
By clicking on the YES option, users can invoke the Meta
Data Wizard. You can turn off this option by checking the Don't
show this option next time, if you prefer not connecting to source
database to fetch Metadata. If you wish to proceed with the conversion
without fetching Metadata click No to proceed.
- Using the Meta Data Wizard
The Meta Data Wizard is a simple three step
wizard that helps you fetch Meta data from Sybase ASE database.
Specifying
the JDBC Driver connection parameters: The Meta Data Wizard
establishes a JDBC connection with the Sybase ASE database. The first
screen prompts you to specify JDBC Driver Settings
Driver class name : This is the name of
the Java Driver class (with fully qualified Package structure) that
should be used to establish connection with the database. By default,
the class named net.sourceforge.jtds.jdbc.Driver is used to
connect to the database. This driver class file with other related
resources is bundled in a Java Archive (JAR) file named jtds-1.0.3.jar. This JDBC driver is bundled
with the SwisSQL Sybase To SQL Server Edition itself.
Loaded Libraries : This configuration is
used to specify the path in the local file system where the JAR file
can be located for usage. By default, the tool will point the <Product
Home>/lib directory in which the jtds-1.0.3.jar
driver can be found.
Click Next to proceed to specify the Sybase
connection parameters.
- Specifying Database Connection
Parameters
Specify JDBC connection parameters either in the
Default Settings tab or the Advanced Settings tab. When
the Default Settings tab is used, the tool assumes the default
JDBC driver (provided in jtds-1.0.3.jar mentioned above) to connect
to the database. The Advanced Settings tab should be used when
some other proprietary driver is used to connect to the Sybase database.
In this case, the connection URL as expected by the proprietary driver
should be specified in the Advanced Settings tab along with
the User name and Password information. If the Default
Settings is used, you need to specify the following connection
parameters in the screen.
- Database Host Name : The server machine name where the
Sybase ASE database is running. This could either be the domain
name of the server or the IP address.
- Database name : The database name whose objects needs to
be fetched for migration.
- User name : The user name using which the connection needs
to be established with the database
- Password : The Password corresponding the user.
Click Next to Proceed
- Fetching Metadata from Sybase ASE DB
Once the connection is established with specified
Sybase ASE database, you can fetch the required Metadata information,
The Fetch Meta Data Wizard, by default fetches all information
based on the Catalog Name, Schema Name, Table name pattern, and Column
name pattern specified. To denote that it fetches all the information,
you will find an * (Asterisk) corresponding to all the fields.
Parameters to fetch Meta data :
- Catalog Name: Specify the Catalog Name you want to fetch
or use default * (Asterisk) option to fetch all Catalog Names.
- Schema Name: Specify the Schema Name you want to fetch
or use default * (Asterisk) option to fetch all Schema Names.
- Table name pattern: This parameter refers to the pattern
in which Metadata information will be fetched from the tables. If
tableNamePattern is given as EMP%, then Metadata information is
retrieved only for the tables whose names start with the pattern
EMP.You can use the default * (Asterisk) option to fetch all Table
name pattern.
- Column name pattern: This parameter refers to the pattern
in which Metadata information will be fetched from the columns.
If ColumnNamePattern is given as NAME%, then Metadata information
is retrieved only for those columns whose names start with the pattern
NAME. You can use the default * (Asterisk) option to fetch all Column
name patterns.
Click Fetch to get all the specified Metadata
from the specified Sybase database.
Loading
Source Sybase T-SQL Scripts
You can load individual Sybase ASE database scripts
such as Tables, Indexes, Views, Triggers, and
Stored Procedures available as SQL files. Before loading the
files it is important to have the Metadata to ensure accurate conversion.
You can still proceed to migrate the files without fetching Metadata.
- Click Add button in the Import TSQL Files section. An information
box appears prompting you to fetch the
Metadata information. It is recommended to fetch the Metadata
information before proceeding with the migration.
- Click Yes invoke the Meta
Data Wizard
- To proceed with your migration without Fetching the Metadata, click
No
- A File Load dialog appears, you can browse to specify the
location of the file(s) you want to load for conversion
- Choose the file you want to load from the dialog. To load multiple
files hold the SHIFT key down and select multiple files and click
Load
- The files are immediately loaded in the T-SQL files tree. You can
migrate selected files or all the files.
Migrating the sybase
objects to SQL Server.
Migrating
the Sybase ASE objects to SQL Server
To migrate all the Sybase ASE objects to SQL Server,
click on the Migrate button shown in the toolbar. When you invoke
the Migrate option, the tool pops up a Progress Viewer window
which shows the progress made on the migration by the tool. The various
options like View Report and Close are disabled when the migration
is in progress. Once the migration for all the objects are complete,
both these options are enabled for the user. The View Report button
can be used to view a brief report on the migration performed by the
tool.
The brief report contains the following information
:
The Summary Report contains the following information
:
- Time taken for migration : This indicates the total time
taken for the migration process (for all the input objects)
- Migration success percentage : This corresponds to the success
level of migration to a scale of 100. The migration percentage is
calculated as
|
(Total number of objects taken for migration
- Total number of objects successfully migrated)
(Total number of objects taken for migration)
|
X 100 |
NOTE : The objects existing in files that
were not parsed by the tool will not be considered for computation
of migration percentage.
- Total number of files : Total number of files considered
for migration.
- Number of files not parsed : Total number of files that could
not be parsed by the tool
- Output directory : The migrated files are saved to the specified
Output Directory
- Reports directory : The directory in which reports pertaining
to the currently concluded migration are stored
- Conversion summary table :This table presents a count of
total number of various objects taken up for migration along with
the count of the number of objects which were successfully migrated
by the tool. A difference in these two counts presents the total number
of objects which were not converted by the tool.
To view a detailed report on the migration,
click on the View Detailed Report button in the reports window.
This will open up a html report in a browser window.
Once you close the Report window and the Progress Viewer window,
you can see the migrated files loaded in the Right hand side MSSQL tree.
As in the sybase objects, the migrated objects are also written to flat
files in the local file system under a pre-defined directory structure.
The default output file path is : "<product_install_home>/SwisSQL/SybaseToSQLServer/Projects/<project_name>/ConvertedMSSQL/<object_type>/<object_name>_T.sql"
Eg: Viewing converted EXAM_SCHEDULE.sql file
under the Table directory
C:\SwisSQL\SybaseToSQLServer<Version_Number>\Projects\Project_1\ConvertedMSSQL\Table\EXAM_SCHEDULE_T.sql
You can view the contents of the output file (migrated object) by selecting
the required object from the right hand side tree and invoking the View
MSSQL button from the GUI.
- Compiling
the migrated objects in SQL Server database
|
