Struct ArrowSchema 

#[repr(C)]
pub struct ArrowSchema {
    pub format: *const c_char,
    pub name: *const c_char,
    pub metadata: *const c_char,
    pub flags: i64,
    pub n_children: i64,
    pub children: *mut *mut ArrowSchema,
    pub dictionary: *mut ArrowSchema,
    pub release: Option<unsafe extern "C" fn(schema: *mut ArrowSchema)>,
    pub private_data: *mut c_void,
}

ArrowSchema C Data Interface.

See: https://arrow.apache.org/docs/format/CDataInterface.html#the-arrowschema-structure

Ownership: This type has no Drop impl. Callers must invoke the release callback (if Some) before dropping to free resources.

Fields

format: *const c_char

name: *const c_char

metadata: *const c_char

flags: i64

n_children: i64

children: *mut *mut ArrowSchema

dictionary: *mut ArrowSchema

release: Option<unsafe extern "C" fn(schema: *mut ArrowSchema)>

private_data: *mut c_void

Implementations

impl ArrowSchema

pub fn empty() -> Self

Create an empty (released) schema.

pub fn is_released(&self) -> bool

Whether this schema has been released (release callback is None).

pub unsafe fn from_raw<T>(ptr: &T) -> &Self

Borrow a foreign C Data Interface schema as ours (zero-copy).

Safety

T must have the Arrow C Data Interface ArrowSchema memory layout.

pub unsafe fn from_raw_mut<T>(ptr: &mut T) -> &mut Self

Mutably borrow a foreign C Data Interface schema as ours (zero-copy).

Safety

T must have the Arrow C Data Interface ArrowSchema memory layout.

pub unsafe fn as_raw<T>(&self) -> &T

Borrow ours as a foreign C Data Interface schema type (zero-copy).

Safety

T must have the Arrow C Data Interface ArrowSchema memory layout.

pub unsafe fn from_owned<T>(val: T) -> Self

Take ownership of a foreign C Data Interface schema.

Safety

• T must have the Arrow C Data Interface ArrowSchema memory layout.
• Ownership transfers — the caller must not use or drop the original.

pub unsafe fn into_owned<T>(self) -> T

Convert into a foreign C Data Interface schema type.

Safety

• T must have the Arrow C Data Interface ArrowSchema memory layout.
• Ownership transfers — the caller must not use or drop the original.

Trait Implementations

impl Debug for ArrowSchema

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Send for ArrowSchema