Safe Haskell	None
Language	Haskell2010

DataFrame.Lazy.Internal.LogicalPlan

Synopsis

Documentation

Data source for a scan node.

Constructors

CsvSource FilePath Char	path, separator
ParquetSource FilePath

Instances details

Show DataSource Source #
Instance details Defined in DataFrame.Lazy.Internal.LogicalPlan Methods showsPrec :: Int -> DataSource -> ShowS # show :: DataSource -> String # showList :: [DataSource] -> ShowS #

Sort direction used in Sort nodes and the public API.

Constructors

Ascending
Descending

Instances details

Show SortOrder Source #
Instance details Defined in DataFrame.Lazy.Internal.LogicalPlan Methods showsPrec :: Int -> SortOrder -> ShowS # show :: SortOrder -> String # showList :: [SortOrder] -> ShowS #
Eq SortOrder Source #
Instance details Defined in DataFrame.Lazy.Internal.LogicalPlan Methods (==) :: SortOrder -> SortOrder -> Bool # (/=) :: SortOrder -> SortOrder -> Bool #
Ord SortOrder Source #
Instance details Defined in DataFrame.Lazy.Internal.LogicalPlan Methods compare :: SortOrder -> SortOrder -> Ordering # (<) :: SortOrder -> SortOrder -> Bool # (<=) :: SortOrder -> SortOrder -> Bool # (>) :: SortOrder -> SortOrder -> Bool # (>=) :: SortOrder -> SortOrder -> Bool # max :: SortOrder -> SortOrder -> SortOrder # min :: SortOrder -> SortOrder -> SortOrder #

Relational-algebra tree that represents what the query computes. No physical decisions (batch size, join strategy) are made here.

Constructors

Scan DataSource Schema	Read columns described by the schema from a source.
Project [Text] LogicalPlan	Retain only the listed columns.
Filter (Expr Bool) LogicalPlan	Keep rows matching the predicate.
Derive Text UExpr LogicalPlan	Add or overwrite a column via an expression.
Join JoinType Text Text LogicalPlan LogicalPlan	Join two sub-plans on the given key columns.
Aggregate [Text] [(Text, UExpr)] LogicalPlan	Group then aggregate.
Sort [(Text, SortOrder)] LogicalPlan	Sort by a list of (column, direction) pairs.
Limit Int LogicalPlan	Retain at most N rows.
SourceDF DataFrame	Lift an already-loaded DataFrame into the lazy plan.

Instances details

Show LogicalPlan Source #
Instance details Defined in DataFrame.Lazy.Internal.LogicalPlan Methods showsPrec :: Int -> LogicalPlan -> ShowS # show :: LogicalPlan -> String # showList :: [LogicalPlan] -> ShowS #