OpenEdge Data Management: DataServer for Microsoft SQL Server

Verifying a schema holder
Verifying a schema holder
The Verify Table Definition utility allows you to verify that the schema holder for your data
source matches the data definitions in the data source. For example, if you delete the customer
table from the data source but not from the schema holder, this utility reports that the schema
holder contains an orphaned object. You can verify the schema information in a single table or
from multiple tables, and then choose to update the tables so that the schema information
matches the data source definitions.
The Verify Table Definition utility reads the definitions in the data source and compares them
to the information in the schema holder. It reports the differences that it finds and their degree
of severity. These are the categories of differences and how they impact your database
applications:
• Minor — These differences have no impact on the usability of your application.
• Retained — These differences cannot be corrected by the Update/Add utility, hence the
term “retained.” You must determine how severely they impact your application and
change the data definitions either in the schema holder using the Data Dictionary or in the
data source.
• Severe — These differences might cause your application to malfunction. When the
Verify utility detects severe differences, it automatically updates the schema holder to
solve the discrepancies by adjusting the schema-image information in the schema holder
to match the data source definitions. Severe differences in definitions that the DataServer
uses internally also cause the schema holder to be updated.
Table 7–4 lists the differences that the Verify Table Definition utility detects.
Table 7–4: Verify utility report (1 of 2)
Database object Difference Category
Table Description Retained
Table Foreign type Severe
Table Name in OpenEdge Retained
Table ROWID index Retained
Index Active Minor
Index Description Retained
Index Name in OpenEdge Retained
Index Unique Retained 1
Index field Abbreviated Minor
Index field Ascending Severe
Index field Order Severe
Field Case sensitivity Retained
7–13