DedupeStrategy (Atlassian Confluence 8.1.0-beta2 API)

All Known Implementing Classes:

JustFailDedupeStrategy, KeepBiggestIdDedupeStrategy, KeepOneDedupeStrategy, KeepSmallestIdDedupeStrategy, MergeToSmallestIdDedupeStrategy
```
public interface DedupeStrategy
```
Decide how to remove duplicates so a unique constraint can be added Note: Tables with composite keys are not supported.

Since:

7.1.0

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`perform(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate, SortedSet<Object> ids)`	Remove duplicates so a unique constraint can be added

- Method Detail
  - perform
```
void perform(org.springframework.jdbc.core.JdbcTemplate jdbcTemplate,
             SortedSet<Object> ids)
      throws UpgradeException
```
    Remove duplicates so a unique constraint can be added
    
    Parameters:
    
    jdbcTemplate - A JdbcTemplate to be used
    
    ids - Set of Ids of duplicate rows in DB. Upon invocation of this method, only one of them can remain in the DB. All Confluence primary keys are of type Long or String so they can be used in SortedSet.
    
    Throws:
    
    UpgradeException - Thrown if there is any error removing duplicates, will cancel the constraint adding process