```
public interface UpdateParams
```
A collection of standard params used by Update handlers

Since:

solr 1.2

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`ASSUME_CONTENT_TYPE`	Override the content type used for UpdateLoader
`static String`	`COLLECTION`
`static String`	`COMMIT`	Commit everything after the command completes
`static String`	`COMMIT_WITHIN`	Commit within a certain time period (in ms)
`static String`	`EXPUNGE_DELETES`
`static String`	`MAX_OPTIMIZE_SEGMENTS`	If optimizing, set the maximum number of segments left in the index after optimization.
`static String`	`OPEN_SEARCHER`	Open up a new searcher as part of a commit
`static String`	`OPTIMIZE`	Optimize the index and commit everything after the command completes
`static String`	`OVERWRITE`	overwrite indexing fields
`static String`	`PREPARE_COMMIT`	expert: calls IndexWriter.prepareCommit
`static String`	`ROLLBACK`	Rollback update commands
`static String`	`SOFT_COMMIT`
`static String`	`UPDATE_CHAIN`	Select the update processor chain to use.
`static String`	`VERSIONS`	Return versions of updates?
`static String`	`WAIT_SEARCHER`	wait for the searcher to be registered/visible

- Field Detail
  - OPEN_SEARCHER
```
static final String OPEN_SEARCHER
```
    Open up a new searcher as part of a commit
    
    See Also:
    
    Constant Field Values
  - WAIT_SEARCHER
```
static final String WAIT_SEARCHER
```
    wait for the searcher to be registered/visible
    
    See Also:
    
    Constant Field Values
  - SOFT_COMMIT
```
static final String SOFT_COMMIT
```
    See Also:
    
    Constant Field Values
  - OVERWRITE
```
static final String OVERWRITE
```
    overwrite indexing fields
    
    See Also:
    
    Constant Field Values
  - COMMIT
```
static final String COMMIT
```
    Commit everything after the command completes
    
    See Also:
    
    Constant Field Values
  - COMMIT_WITHIN
```
static final String COMMIT_WITHIN
```
    Commit within a certain time period (in ms)
    
    See Also:
    
    Constant Field Values
  - OPTIMIZE
```
static final String OPTIMIZE
```
    Optimize the index and commit everything after the command completes
    
    See Also:
    
    Constant Field Values
  - PREPARE_COMMIT
```
static final String PREPARE_COMMIT
```
    expert: calls IndexWriter.prepareCommit
    
    See Also:
    
    Constant Field Values
  - ROLLBACK
```
static final String ROLLBACK
```
    Rollback update commands
    
    See Also:
    
    Constant Field Values
  - COLLECTION
```
static final String COLLECTION
```
    See Also:
    
    Constant Field Values
  - UPDATE_CHAIN
```
static final String UPDATE_CHAIN
```
    Select the update processor chain to use. A RequestHandler may or may not respect this parameter
    
    See Also:
    
    Constant Field Values
  - ASSUME_CONTENT_TYPE
```
static final String ASSUME_CONTENT_TYPE
```
    Override the content type used for UpdateLoader
    
    See Also:
    
    Constant Field Values
  - MAX_OPTIMIZE_SEGMENTS
```
static final String MAX_OPTIMIZE_SEGMENTS
```
    If optimizing, set the maximum number of segments left in the index after optimization. Integer.MAX_INT is the default to respect maxMergeSegmentsMB
    
    See Also:
    
    Constant Field Values
  - EXPUNGE_DELETES
```
static final String EXPUNGE_DELETES
```
    See Also:
    
    Constant Field Values
  - VERSIONS
```
static final String VERSIONS
```
    Return versions of updates?
    
    See Also:
    
    Constant Field Values

Interface UpdateParams

Field Summary

Field Detail

OPEN_SEARCHER

WAIT_SEARCHER

SOFT_COMMIT

OVERWRITE

COMMIT

COMMIT_WITHIN

OPTIMIZE

PREPARE_COMMIT

ROLLBACK

COLLECTION

UPDATE_CHAIN

ASSUME_CONTENT_TYPE

MAX_OPTIMIZE_SEGMENTS

EXPUNGE_DELETES

VERSIONS