OpenEdge Data Management: DataServer for Microsoft SQL Server

Chapter 7: The DataServer Tutorial
Table 53: Generate Delta.sql OpenEdge to MSS utility (3 of 3)
Interface element Description
For field widths use: When pushing fields to a foreign data
source, you can select one of two
primary field format options:
• Width — Uses the value of the
_width field in the _field record.
• 4GL Format — Use the value of
the _format field in the _field
record. (default)
If you select the 4GL Format
option, you have an additional
setting to define:
• Expand x(8) to 30 —This setting
is on by default to indicate that
the format for the character fields
defined as x(8) will be created as
30 characters.
Note: You cannot use the Expand
x(8) to 30 setting with the Width
option.
For Create RECID use: Select either Trigger or Computed
Column. Trigger is selected by
default. Computed Column is
preferred as it offers greater reliability,
but is only available for MS SQL
Server 2005 and later.
3. Choose OK. The utility generates a delta.sql file and, optionally, a delta.df
file.
When this step is performed for an MS SQL Server DataServer, and the
incremental update procedure includes changing an existing field from INTEGER to
INT64 in the schema holder, the DataServer supports the update process through
the ALTER TABLE ALTER COLUMN statement. If a column is part of an index, the
incremental schema migration utility generates a script to drop any indexes that
contain the column, change the column’s data type to BIGINT, and then re-adds
the indexes. During this process, the utility uses the index definitions defined in
the schema holder.
4. After running the utility, you must apply the SQL that the utility generates to the
MS SQL Server database and load the new delta.df file into the original schema
holder so that it is synchronized with the modified MS SQL Server database.
Note that if you updated an existing field from INTEGER to INT64 as described in
Step 3 of this procedure, you also must confirm that none of the data is lost.
306 OpenEdge Data Management: DataServer for Microsoft SQL Server