Struct Block

pub struct Block {
    pub info: BlockInfo,
    pub rows: u64,
    pub column_types: Vec<(String, Type)>,
    pub column_data: Vec<Value>,
}

A chunk of data in columnar form.

Fields

info: BlockInfo

Metadata about the block

rows: u64

The number of rows contained in the block

column_types: Vec<(String, Type)>

The type of each column by name, in order.

column_data: Vec<Value>

The data of each column by name, in order. All Value should correspond to the associated type in column_types.

Implementations

impl Block

pub fn take_iter_rows( &mut self, ) -> BlockRowValueIter<'_, impl Iterator<Item = Value>>

Iterate over all rows with owned values.

pub fn estimate_size(&self) -> usize

Estimate the serialized size of this block for buffer allocation

pub fn from_rows<T: Row>( rows: Vec<T>, schema: Vec<(String, Type)>, ) -> Result<Self>

Create a block from a vector of rows and a schema.

Errors

Returns an error if the number of rows does not match the number of columns, serializing fails, or the field cannot be found in the schema.

Trait Implementations

impl Clone for Block

fn clone(&self) -> Block

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Block

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

Formats the value using the given formatter.

impl Default for Block

fn default() -> Block

Returns the “default value” for a type.