object GpuWindowExec extends Arm with Serializable
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def
closeOnExcept[T <: AutoCloseable, V](r: Option[T])(block: (Option[T]) ⇒ V): V
Executes the provided code block, closing the resources only if an exception occurs
Executes the provided code block, closing the resources only if an exception occurs
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closeOnExcept[T <: AutoCloseable, V](r: ArrayBuffer[T])(block: (ArrayBuffer[T]) ⇒ V): V
Executes the provided code block, closing the resources only if an exception occurs
Executes the provided code block, closing the resources only if an exception occurs
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closeOnExcept[T <: AutoCloseable, V](r: Array[T])(block: (Array[T]) ⇒ V): V
Executes the provided code block, closing the resources only if an exception occurs
Executes the provided code block, closing the resources only if an exception occurs
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closeOnExcept[T <: AutoCloseable, V](r: Seq[T])(block: (Seq[T]) ⇒ V): V
Executes the provided code block, closing the resources only if an exception occurs
Executes the provided code block, closing the resources only if an exception occurs
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closeOnExcept[T <: AutoCloseable, V](r: T)(block: (T) ⇒ V): V
Executes the provided code block, closing the resource only if an exception occurs
Executes the provided code block, closing the resource only if an exception occurs
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freeOnExcept[T <: RapidsBuffer, V](r: T)(block: (T) ⇒ V): V
Executes the provided code block, freeing the RapidsBuffer only if an exception occurs
Executes the provided code block, freeing the RapidsBuffer only if an exception occurs
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- def isRunningWindow(spec: GpuWindowSpecDefinition): Boolean
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def
remapAttributes(windowOps: Seq[NamedExpression], post: Seq[NamedExpression]): Seq[NamedExpression]
As a part of
splitAndDedupthe dedup part adds a layer of indirection.As a part of
splitAndDedupthe dedup part adds a layer of indirection. This attempts to remove that layer of indirection.- windowOps
the windowOps output of splitAndDedup
- post
the post output of splitAndDedup
- returns
a version of windowOps that has removed as many un-needed temp aliases as possible.
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def
splitAndDedup(exprs: Seq[NamedExpression]): (Seq[NamedExpression], Seq[NamedExpression], Seq[NamedExpression])
In some distributions expressions passed into WindowExec can have more operations in them than just a WindowExpression wrapped in an GpuAlias.
In some distributions expressions passed into WindowExec can have more operations in them than just a WindowExpression wrapped in an GpuAlias. This is a problem if we want to try and do multiple window operations in a single pass to speed things up or if we need to add new transitive window functions when we are doing some memory optimizations, like running window. This will split the input expressions into three sets of expressions. The first set is a project with no window expressions in it at all. The second takes the first as input and will only have aliases to columns in the first or named expressions wrapping a single window function in it. The third uses the second as input and will do any final steps to combine window functions together.
For example
SUM(a) - SUM(b + c) over (PARTITION BY d ORDER BY e) as resultwould be transformed intoPhase 1 (Pre project): a, b + c as _tmp0, d, e Phase 2 (Window Operations): SUM(a) over (PARTITION BY d ORDER BY e) as _tmp1, SUM(_tmp0) over (PARTITION BY d ORDER BY e) as _tmp2 Phase 3 (Post Project): (_tmp1 - _tmp2) as result
This assumes that there is not a window function of another window function, like
LAG(SUM(a), 2)which appears to be something all distros split apart into separate window operations, so we are good.- exprs
the input expressions to a GpuWindowExec
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withResource[T <: AutoCloseable, V](h: CloseableHolder[T])(block: (CloseableHolder[T]) ⇒ V): V
Executes the provided code block and then closes the resource
Executes the provided code block and then closes the resource
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def
withResource[T <: AutoCloseable, V](r: ArrayBuffer[T])(block: (ArrayBuffer[T]) ⇒ V): V
Executes the provided code block and then closes the array buffer of resources
Executes the provided code block and then closes the array buffer of resources
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withResource[T <: AutoCloseable, V](r: Array[T])(block: (Array[T]) ⇒ V): V
Executes the provided code block and then closes the array of resources
Executes the provided code block and then closes the array of resources
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withResource[T <: AutoCloseable, V](r: Seq[T])(block: (Seq[T]) ⇒ V): V
Executes the provided code block and then closes the sequence of resources
Executes the provided code block and then closes the sequence of resources
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withResource[T <: AutoCloseable, V](r: Option[T])(block: (Option[T]) ⇒ V): V
Executes the provided code block and then closes the Option[resource]
Executes the provided code block and then closes the Option[resource]
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withResource[T <: AutoCloseable, V](r: T)(block: (T) ⇒ V): V
Executes the provided code block and then closes the resource
Executes the provided code block and then closes the resource
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withResourceIfAllowed[T, V](r: T)(block: (T) ⇒ V): V
Executes the provided code block and then closes the value if it is AutoCloseable
Executes the provided code block and then closes the value if it is AutoCloseable
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