polars.LazyFrame.set_sorted

LazyFrame.set_sorted(
    column: str | list[str],
    *more_columns: str,
    descending: bool | list[bool] = False,
    nulls_last: bool | list[bool] = False,
) → LazyFrame

Flag a column as sorted.

This can speed up future operations.

engine:In MemoryStreamingDistributed

Parameters:

column

Column(s) that is sorted

more_columns

Columns that are sorted over after column.

descending

Whether the column is sorted in descending order.

nulls_last

Whether the nulls are at the end.

Warning

This can lead to incorrect results if the data is NOT sorted!! Use with care!