org.apache.ignite.cache.query

## Class ScanQuery<K,V>

- java.lang.Object
- - org.apache.ignite.cache.query.Query<javax.cache.Cache.Entry<K,V>>
  - - org.apache.ignite.cache.query.ScanQuery<K,V>

- All Implemented Interfaces:
    Serializable

      public final class ScanQuery<K,V>
      extends Query<javax.cache.Cache.Entry<K,V>>

  Scan query over cache entries. Will accept all the entries if no predicate was set.
  See Also:
    `IgniteCache.query(Query)`, Serialized Form

- - ### Field Summary

    - ### Fields inherited from class org.apache.ignite.cache.query.Query

      `DFLT_PAGE_SIZE`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ScanQuery()` Create scan query returning all entries.
    `ScanQuery(@Nullable IgniteBiPredicate<K,V> filter)` Create scan query with filter.
    `ScanQuery(int part)` Creates partition scan query returning all entries for given partition.
    `ScanQuery(@Nullable Integer part, @Nullable IgniteBiPredicate<K,V> filter)` Create scan query with filter.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `IgniteBiPredicate<K,V>` | `getFilter()` Gets filter.
    `@Nullable Integer` | `getPartition()` Gets partition number over which this query should iterate.
    `ScanQuery<K,V>` | `setFilter(@Nullable IgniteBiPredicate<K,V> filter)` Sets filter.
    `ScanQuery<K,V>` | `setLocal(boolean loc)` Sets whether this query should be executed on local node only.
    `ScanQuery<K,V>` | `setPageSize(int pageSize)` Sets optional page size, if `0`, then default is used.
    `ScanQuery<K,V>` | `setPartition(@Nullable Integer part)` Sets partition number over which this query should iterate.
    `String` | `toString()`

    - ### Methods inherited from class org.apache.ignite.cache.query.Query

      `getPageSize, isLocal, prepare`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### ScanQuery

          public ScanQuery()

      Create scan query returning all entries.

    - #### ScanQuery

          public ScanQuery(int part)

      Creates partition scan query returning all entries for given partition.
      Parameters:
        `part` - Partition.

    - #### ScanQuery

          public ScanQuery(@Nullable
                           @Nullable IgniteBiPredicate<K,V> filter)

      Create scan query with filter.
      Parameters:
        `filter` - Filter. If `null` then all entries will be returned.

    - #### ScanQuery

          public ScanQuery(@Nullable
                           @Nullable Integer part,
                           @Nullable
                           @Nullable IgniteBiPredicate<K,V> filter)

      Create scan query with filter.
      Parameters:
        `part` - Partition.
        `filter` - Filter. If `null` then all entries will be returned.

  - ### Method Detail

    - #### getFilter

          public IgniteBiPredicate<K,V> getFilter()

      Gets filter.
      Returns:
        Filter.

    - #### setFilter

          public ScanQuery<K,V> setFilter(@Nullable
                                          @Nullable IgniteBiPredicate<K,V> filter)

      Sets filter.
      Parameters:
        `filter` - Filter. If `null` then all entries will be returned.
      Returns:
        `this` for chaining.

    - #### setPartition

          public ScanQuery<K,V> setPartition(@Nullable
                                             @Nullable Integer part)

      Sets partition number over which this query should iterate. If `null`, query will iterate over all partitions in the cache. Must be in the range [0, N) where N is partition number in the cache.
      Parameters:
        `part` - Partition number over which this query should iterate.
      Returns:
        `this` for chaining.

    - #### getPartition

          @Nullable
          public @Nullable Integer getPartition()

      Gets partition number over which this query should iterate. Will return `null` if partition was not set. In this case query will iterate over all partitions in the cache.
      Returns:
        Partition number or `null`.

    - #### setPageSize

          public ScanQuery<K,V> setPageSize(int pageSize)

      Sets optional page size, if `0`, then default is used.
      Overrides:
        `setPageSize` in class `Query<javax.cache.Cache.Entry<K,V>>`
      Parameters:
        `pageSize` - Optional page size.
      Returns:
        `this` for chaining.

    - #### setLocal

          public ScanQuery<K,V> setLocal(boolean loc)

      Sets whether this query should be executed on local node only.
      Overrides:
        `setLocal` in class `Query<javax.cache.Cache.Entry<K,V>>`
      Parameters:
        `loc` - Local flag.
      Returns:
        `this` for chaining.

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Query<javax.cache.Cache.Entry<K,V>>`

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Ignite Database and Caching Platform | : ver. 2.12.0
Release Date | : January 10 2022