Packages

  • package root
    Definition Classes
    root
  • package quasar
    Definition Classes
    root
  • package qscript

    The various representations of an arbitrary query, as seen by the filesystem connectors, along with the operations for dealing with them.

    The various representations of an arbitrary query, as seen by the filesystem connectors, along with the operations for dealing with them.

    There are a few patterns that are worth noting: - (src: A, ..., lBranch: FreeQS[T], rBranch: FreeQS[T], ...) – used in operations that combine multiple data sources (notably joins and unions). This holds the divergent parts of the data sources in the branches, with SrcHole indicating a reference back to the common src of the two branches. There is not required to be a SrcHole. - Free[F, A] – we use this structure as a restricted form of variable binding, where F is some pattern functor, and A is some enumeration that has a specific referent. E.g., FreeMap is a recursive structure of MapFunc that has a single “variable”, SrcHole, which (usually) refers to the src parameter of that operation. JoinFunc, FreeQS, and the repair parameter to Reduce behave similarly. - We use the type parameter QS[_] to indicate QScript, as well as the type parameters IN[_] and OUT[_] to indicate the input and output coproducts in transformations where they can be different.

    Definition Classes
    quasar
  • package qsu
    Definition Classes
    qscript
  • object MappableRegion

    The maximal "mappable" (expressable via MapFunc) region of a graph.

    The maximal "mappable" (expressable via MapFunc) region of a graph.

    Definition Classes
    qsu
  • MaximalUnary

object MaximalUnary

An extractor for pulling out the a unique unary root of a mappable region (if it exists) and the associated FreeMap. If the unique unary root is Unreferenced(), then this extractor will fail (produce None). Note that this is less robust than the analogous behavior in MinimizeAutoJoins#coalesceRoots, and will not attempt things such as rewriting Filter into Cond.

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  1. final def !=(arg0: Any): Boolean
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  11. final def isInstanceOf[T0]: Boolean
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  16. def toString(): String
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  17. def unapply[T[_[_]]](g: QSUGraph[T]): slamdata.Predef.Option[(QSUGraph[T], FreeMap[T])]
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