final class FixedLengthRowBasedKeyValueBatch extends RowBasedKeyValueBatch
An implementation of RowBasedKeyValueBatch in which all key-value records have same length.
The format for each record looks like this: [UnsafeRow for key of length klen] [UnsafeRow for Value of length vlen] [8 bytes pointer to next] Thus, record length = klen + vlen + 8
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new
FixedLengthRowBasedKeyValueBatch(keySchema: StructType, valueSchema: StructType, maxRows: Int, manager: TaskMemoryManager)
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final
def
!=(arg0: Any): Boolean
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final
def
##(): Int
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final
def
==(arg0: Any): Boolean
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def
acquireMemory(arg0: Long): Long
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def
allocateArray(arg0: Long): LongArray
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def
allocatePage(arg0: Long): MemoryBlock
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def
appendRow(kbase: Any, koff: Long, klen: Int, vbase: Any, voff: Long, vlen: Int): UnsafeRow
Append a key value pair.
Append a key value pair. It copies data into the backing MemoryBlock. Returns an UnsafeRow pointing to the value if succeeds, otherwise returns null.
- Definition Classes
- FixedLengthRowBasedKeyValueBatch → RowBasedKeyValueBatch
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final
def
asInstanceOf[T0]: T0
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def
clone(): AnyRef
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final
def
close(): Unit
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- RowBasedKeyValueBatch → Closeable → AutoCloseable
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final
def
eq(arg0: AnyRef): Boolean
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def
equals(arg0: Any): Boolean
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def
finalize(): Unit
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def
freeArray(arg0: LongArray): Unit
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def
freeMemory(arg0: Long): Unit
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def
freePage(arg0: MemoryBlock): Unit
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final
def
getClass(): Class[_]
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def
getKeyRow(rowId: Int): UnsafeRow
Returns the key row in this batch at
rowId.Returns the key row in this batch at
rowId. Returned key row is reused across calls.- Definition Classes
- FixedLengthRowBasedKeyValueBatch → RowBasedKeyValueBatch
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def
getMode(): MemoryMode
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- MemoryConsumer
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def
getUsed(): Long
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def
getValueFromKey(rowId: Int): UnsafeRow
Returns the value row by two steps: 1) looking up the key row with the same id (skipped if the key row is cached) 2) retrieve the value row by reusing the metadata from step 1) In most times, 1) is skipped because
getKeyRow(id)is often called beforegetValueRow(id).Returns the value row by two steps: 1) looking up the key row with the same id (skipped if the key row is cached) 2) retrieve the value row by reusing the metadata from step 1) In most times, 1) is skipped because
getKeyRow(id)is often called beforegetValueRow(id).- Attributes
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- Definition Classes
- FixedLengthRowBasedKeyValueBatch → RowBasedKeyValueBatch
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final
def
getValueRow(rowId: Int): UnsafeRow
Returns the value row in this batch at
rowId.Returns the value row in this batch at
rowId. Returned value row is reused across calls. BecausegetValueRow(id)is always called aftergetKeyRow(id)with the same id, we usegetValueFromKey(id) to retrieve value row, which reuses metadata from the cached key.- Definition Classes
- RowBasedKeyValueBatch
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def
hashCode(): Int
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final
def
isInstanceOf[T0]: Boolean
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ne(arg0: AnyRef): Boolean
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final
def
notify(): Unit
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final
def
notifyAll(): Unit
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final
def
numRows(): Int
- Definition Classes
- RowBasedKeyValueBatch
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def
rowIterator(): KVIterator[UnsafeRow, UnsafeRow]
Returns an iterator to go through all rows
Returns an iterator to go through all rows
- Definition Classes
- FixedLengthRowBasedKeyValueBatch → RowBasedKeyValueBatch
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final
def
spill(size: Long, trigger: MemoryConsumer): Long
Sometimes the TaskMemoryManager may call spill() on its associated MemoryConsumers to make space for new consumers.
Sometimes the TaskMemoryManager may call spill() on its associated MemoryConsumers to make space for new consumers. For RowBasedKeyValueBatch, we do not actually spill and return 0. We should not throw OutOfMemory exception here because other associated consumers might spill
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- RowBasedKeyValueBatch → MemoryConsumer
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def
spill(): Unit
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def
synchronized[T0](arg0: ⇒ T0): T0
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def
toString(): String
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wait(): Unit
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def
wait(arg0: Long, arg1: Int): Unit
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def
wait(arg0: Long): Unit
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