DatabaseUpdater (Avoka Transact API - 21.5.0)

```
public interface DatabaseUpdater
```
Provides an database schema or data change version updater interface.

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`DATABASE_PRODUCT_MYSQL`	'mysql' database product.
`static String`	`DATABASE_PRODUCT_ORACLE`	The 'oracle database product.
`static String`	`DATABASE_PRODUCT_SQL_SERVER`	The 'sql server' Oracle database product.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`performUpdate(org.apache.cayenne.access.DataContext dataContext)`	Perform database schema or data change version update.

- Field Detail
  - DATABASE_PRODUCT_ORACLE
```
static final String DATABASE_PRODUCT_ORACLE
```
    The 'oracle database product.
    
    See Also:
    
    Constant Field Values
  - DATABASE_PRODUCT_SQL_SERVER
```
static final String DATABASE_PRODUCT_SQL_SERVER
```
    The 'sql server' Oracle database product.
    
    See Also:
    
    Constant Field Values
  - DATABASE_PRODUCT_MYSQL
```
static final String DATABASE_PRODUCT_MYSQL
```
    'mysql' database product.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - performUpdate
```
int performUpdate(org.apache.cayenne.access.DataContext dataContext)
           throws Exception
```
    Perform database schema or data change version update.
    
    Parameters:
    
    dataContext - the Cayenne DataContext
    
    Returns:
    
    the number of rows changed
    
    Throws:
    
    Exception - if an error occurs