Struct TableV 

pub struct TableV {
    pub name: String,
    pub fields: Vec<Arc<Field>>,
    pub cols: Vec<ArrayV>,
    pub offset: usize,
    pub len: usize,
}

TableView

Row-aligned view into a Table over [offset .. offset+len).

Fields

• name: table name - propagated from the parent Table.
• fields: shared schema - Arc<Field> per column.
• cols: column windows as ArrayV, all with the same (offset, len).
• offset: starting row, relative to parent table.
• len: number of rows in the window.

Notes

• Construction from a Table/Arc<Table> is zero-copy for column data.
• Use from_self to take sub-windows cheaply.
• Use to_table() to materialise an owned copy of just this window.
• Column helpers (col, col_by_name, col_window) provide ergonomic access.

Fields

name: String

Table name

fields: Vec<Arc<Field>>

Fields

cols: Vec<ArrayV>

Column slices (field metadata + windowed array)

offset: usize

Row offset from start of parent table

len: usize

Length of slice (in rows)

Implementations

impl TableV

pub fn from_table(table: Table, offset: usize, len: usize) -> Self

Creates a new TableView over table[offset .. offset+len). Provides a non-owning view into a subrange of the table.

pub fn from_arc_table(table: Arc<Table>, offset: usize, len: usize) -> Self

Creates a new TableView over table[offset .. offset+len). Provides a non-owning view into a subrange of the table.

pub fn from_self(&self, offset: usize, len: usize) -> Self

Derives a subwindow from this TableView, adjusted by offset and len.

pub fn is_empty(&self) -> bool

Returns true if the window contains no rows.

pub fn end(&self) -> usize

Returns the exclusive end row index of the window.

pub fn n_cols(&self) -> usize

Returns the number of columns in the table window.

pub fn n_rows(&self) -> usize

Returns the number of rows in the window.

pub fn name(&self) -> &str

Returns the name of the table.

pub fn col(&self, idx: usize) -> Option<&ArrayV>

Returns a reference to the column window at the given index.

pub fn cols(&self) -> Vec<&ArrayV>

Returns a slice of all column windows.

pub fn col_names(&self) -> impl Iterator<Item = &str>

Returns an iterator over all column names.

pub fn col_index(&self, name: &str) -> Option<usize>

Returns the index of a column by name.

pub fn col_window(&self, idx: usize) -> Option<ArrayV>

Returns the window tuple of the column at the given index.

pub fn col_name(&self, idx: usize) -> Option<&str>

Returns the name of the column at the given index.

pub fn cols_nullable(&self) -> Vec<bool>

Returns a Vec<bool> indicating which columns are nullable.

pub fn col_by_name(&self, name: &str) -> Option<&ArrayV>

Returns a reference to the column window by column name.

pub fn to_table(&self) -> Table

Consumes the TableView, producing an owned Table with the sliced data. Copies the data.

pub fn extract_column(field: &Field, window: &ArrayV) -> FieldArray

Converts a column window into an owned FieldArray, slicing the array and copying data. Copies the data.

Trait Implementations

impl Clone for TableV

fn clone(&self) -> TableV

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TableV

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

Formats the value using the given formatter.

impl Display for TableV

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

Formats the value using the given formatter.

impl From<TableV> for Value

fn from(v: TableV) -> Self

Converts to this type from the input type.

impl PartialEq for TableV

fn eq(&self, other: &TableV) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<Value> for TableV

type Error = MinarrowError

The type returned in the event of a conversion error.

fn try_from(v: Value) -> Result<Self, Self::Error>

Performs the conversion.

impl StructuralPartialEq for TableV