Spark.Core.Row

Documentation

data Cell

The basic representation of one row of data. This is a standard type that comes out of the SQL engine in Spark.

An element in a Row object. All objects manipulated by the Spark framework are assumed to be convertible to cells.

This is usually handled by generic transforms.

Constructors

Empty

IntElement !Int

StringElement !Text

RowArray !(Vector Cell)

Instances

Eq Cell

Methods

(==) :: Cell -> Cell -> Bool

(/=) :: Cell -> Cell -> Bool

Show Cell

Methods

showsPrec :: Int -> Cell -> ShowS

show :: Cell -> String

showList :: [Cell] -> ShowS

ToJSON Cell

Cell

Methods

toJSON :: Cell -> Value

toEncoding :: Cell -> Encoding

FromSQL Cell

Methods

_cellToValue :: Cell -> TryS Cell

data Row

A Row of data: the basic data structure to transport information TODO rename to rowCells

Constructors

Row

Fields

• cells :: !(Vector Cell)

Instances

Eq Row

Methods

(==) :: Row -> Row -> Bool

(/=) :: Row -> Row -> Bool

Show Row

Methods

showsPrec :: Int -> Row -> ShowS

show :: Row -> String

showList :: [Row] -> ShowS

ToJSON Row

Row

Methods

toJSON :: Row -> Value

toEncoding :: Row -> Encoding

class ToSQL a

Instances

ToSQL Int

Methods

_valueToCell :: Int -> Cell

ToSQL Text

Methods

_valueToCell :: Text -> Cell

ToSQL a => ToSQL (Maybe a)

Methods

_valueToCell :: Maybe a -> Cell

(ToSQL a, ToSQL b) => ToSQL (a, b)

Methods

_valueToCell :: (a, b) -> Cell

class FromSQL a

Instances

FromSQL Int

Methods

_cellToValue :: Cell -> TryS Int

FromSQL Text

Methods

_cellToValue :: Cell -> TryS Text

FromSQL Cell

Methods

_cellToValue :: Cell -> TryS Cell

FromSQL a => FromSQL [a]

Methods

_cellToValue :: Cell -> TryS [a]

FromSQL a => FromSQL (Maybe a)

Methods

_cellToValue :: Cell -> TryS (Maybe a)

(FromSQL a1, FromSQL a2) => FromSQL (a1, a2)

Methods

_cellToValue :: Cell -> TryS (a1, a2)

valueToCell :: ToSQL a => a -> Cell

cellToValue :: FromSQL a => Cell -> Either Text a

jsonToCell :: DataType -> Value -> Either Text Cell

Decodes a JSON into a row. This operation requires a SQL type that describes the schema.

rowArray :: [Cell] -> Cell

Convenience constructor for an array of cells.