# Class DeleteBatchQuery

java.lang.Object
org.apache.cayenne.query.BatchQuery
org.apache.cayenne.query.DeleteBatchQuery

All Implemented Interfaces:
  `Serializable, Query`

public class DeleteBatchQuery extends BatchQuery
Batched delete query.

See Also:
  - Serialized Form

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected boolean`
  `usingOptimisticLocking`

  ### Fields inherited from class BatchQuery

  `dbAttributes, dbEntity, rows`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `DeleteBatchQuery(DbEntity dbEntity, List<DbAttribute> qualifierAttributes, Collection<String> nullQualifierNames, int batchCapacity)`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `add(Map<String,Object> objectId)`
  `boolean`
  `isNull(DbAttribute attribute)`
  Returns true if a given attribute always has a null value in the batch.
  `boolean`
  `isUsingOptimisticLocking()`
  Returns true if the batch query uses optimistic locking.
  `void`
  `setUsingOptimisticLocking(boolean usingOptimisticLocking)`

  ### Methods inherited from class BatchQuery

  `createSQLAction, getDbAttributes, getDbEntity, getMetaData, getRows, route`

  ### Methods inherited from class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Field Details

  - ### usingOptimisticLocking

    protected boolean usingOptimisticLocking

- ## Constructor Details

  - ### DeleteBatchQuery

    public DeleteBatchQuery(DbEntity dbEntity, List<DbAttribute> qualifierAttributes, Collection<String> nullQualifierNames, int batchCapacity)

- ## Method Details

  - ### isNull

    public boolean isNull(DbAttribute attribute)
    Returns true if a given attribute always has a null value in the batch.
    Since:
      1.2

  - ### isUsingOptimisticLocking

    public boolean isUsingOptimisticLocking()
    Returns true if the batch query uses optimistic locking.
    Overrides:
      `isUsingOptimisticLocking` in class `BatchQuery`
    Since:
      1.2

  - ### setUsingOptimisticLocking

    public void setUsingOptimisticLocking(boolean usingOptimisticLocking)
    Since:
      1.2

  - ### add

    public void add(Map<String,Object> objectId)