Module datafusion::prelude

A "prelude" for users of the datafusion crate.

Like the standard library's prelude, this module simplifies importing of common items. Unlike the standard prelude, the contents of this module must be imported manually:

use datafusion::prelude::*;

Re-exports

pub use crate::dataframe::DataFrame;

pub use crate::execution::context::ExecutionConfig;

pub use crate::execution::context::ExecutionContext;

pub use crate::physical_plan::csv::CsvReadOptions;

Enums

JoinType	Join type
Partitioning	Logical partitioning schemes supported by the repartition operator.

Functions

array	returns an array of fixed size with each argument on it.
avg	Create an expression to represent the avg() aggregate function
col	Create a column expression based on a column name
concat	returns the concatenation of string expressions
count	Create an expression to represent the count() aggregate function
create_udf	Creates a new UDF with a specific signature and specific return type. This is a helper function to create a new UDF. The function create_udf returns a subset of all possible ScalarFunction:
in_list	Create an in_list expression
length	returns the length of a string in bytes
lit	Create a literal expression
lower
ltrim
max	Create an expression to represent the max() aggregate function
md5
min	Create an expression to represent the min() aggregate function
rtrim
sha224
sha256
sha384
sha512
sum	Create an expression to represent the sum() aggregate function
trim
upper