polars.LazyFrame.collect#

LazyFrame.collect(type_coercion: bool = True, predicate_pushdown: bool = True, projection_pushdown: bool = True, simplify_expression: bool = True, string_cache: bool = False, no_optimization: bool = False, slice_pushdown: bool = True, common_subplan_elimination: bool = True) DataFrame[source]#

Collect into a DataFrame.

Note: use fetch() if you want to run your query on the first n rows only. This can be a huge time saver in debugging queries.

Parameters:
type_coercion

Do type coercion optimization.

predicate_pushdown

Do predicate pushdown optimization.

projection_pushdown

Do projection pushdown optimization.

simplify_expression

Run simplify expressions optimization.

string_cache

This argument is deprecated. Please set the string cache globally. The argument will be ignored

no_optimization

Turn off (certain) optimizations.

slice_pushdown

Slice pushdown optimization.

common_subplan_elimination

Will try to cache branching subplans that occur on self-joins or unions.

Returns:
DataFrame