Crate datafusion_common

Re-exports

pub use scalar::ScalarType;

pub use scalar::ScalarValue;

Modules

bisect

This module provides the bisect function, which implements binary search.

from_slice

A trait to define from_slice functions for arrow types

scalar

This module provides ScalarValue, an enum that can be used for storage of single elements

Macros

context

downcast_value

Downcast an Arrow Array to a concrete type, return an DataFusionError::Internal if the cast is not possible. In normal usage of DataFusion the downcast should always succeed.

internal_err

plan_err

unwrap_or_internal_err

Unwrap an Option if possible. Otherwise return an DataFusionError::Internal. In normal usage of DataFusion the unwrap should always succeed.

Structs

Column

A named reference to a qualified field in a schema.

DFField

DFField wraps an Arrow field and adds an optional qualifier

DFSchema

DFSchema wraps an Arrow schema and adds relation names

Enums

DataFusionError

DataFusion error

SchemaError

Schema-related errors

Traits

ExprSchema

Provides schema information needed by certain methods of Expr (defined in the datafusion-common crate).

ToDFSchema

Convenience trait to convert Schema like things to DFSchema and DFSchemaRef with fewer keystrokes

Functions

field_not_found

Create a “field not found” DataFusion::SchemaError

Type Definitions

DFSchemaRef

A reference-counted reference to a DFSchema.

Result

Result type for operations that could result in an DataFusionError