Struct RowSchema 

pub struct RowSchema { /* private fields */ }

Pre-computed row layout derived from an Arrow schema.

Converts an Arrow [SchemaRef] into a fixed layout suitable for compiled field access via pointer arithmetic. The layout is computed once and reused across all rows sharing the same schema.

Implementations

impl RowSchema

pub fn from_arrow(schema: &SchemaRef) -> Result<Self, RowError>

Creates a RowSchema from an Arrow schema.

Errors

Returns RowError::UnsupportedType if any field has an unsupported [DataType].

pub const fn header_size() -> usize

Returns the header size in bytes (always 8).

pub fn null_bitmap_size(&self) -> usize

Returns the padded null bitmap size in bytes.

pub fn fixed_region_offset(&self) -> usize

Returns the byte offset where the fixed data region begins.

pub fn min_row_size(&self) -> usize

Returns the minimum row size in bytes (header + bitmap + fixed region, no variable data).

pub fn field_count(&self) -> usize

Returns the number of fields in the schema.

pub fn field(&self, idx: usize) -> &FieldLayout

Returns the layout for the field at the given index.

Panics

Panics if idx >= field_count().

pub fn fields(&self) -> &[FieldLayout]

Returns all field layouts.

pub fn arrow_schema(&self) -> &SchemaRef

Returns the Arrow schema this row layout was derived from.

Trait Implementations

impl Clone for RowSchema

fn clone(&self) -> RowSchema

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RowSchema

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

Formats the value using the given formatter.