Module polars_lazy::frame

Lazy variant of a DataFrame.

Modules

• pivotpivot
  Polars lazy does not implement a pivot because it is impossible to know the schema without materializing the whole dataset. This makes a pivot quite a terrible operation for performant workflows. An optimization can never be pushed down passed a pivot.

Structs

• InProcessQueryNon-WebAssembly
• JoinBuilder
• LazyCsvReadercsv
• LazyFrame
  Lazy abstraction over an eager DataFrame. It really is an abstraction over a logical plan. The methods of this struct will incrementally modify a logical plan until output is requested (via collect).
• LazyGroupBy
  Utility struct for lazy group_by operation.
• LazyJsonLineReaderjson
• OptState
  State of the allowed optimizations
• ScanArgsAnonymous
• ScanArgsIpcipc
• ScanArgsParquetparquet

Traits

• IntoLazy
• LazyFileListReader
  Reads LazyFrame from a filesystem or a cloud storage. Supports glob patterns.

Type Aliases

• AllowedOptimizations
  AllowedOptimizations
• PathIterator