Struct ColumnInfo 

pub struct ColumnInfo { /* private fields */ }

Column metadata shared across all rows in a result set.

This struct is wrapped in Arc so all rows from the same query share the same column information, saving memory for large result sets.

Implementations

impl ColumnInfo

pub fn new(names: Vec<String>) -> Self

Create new column info from a list of column names.

pub fn len(&self) -> usize

Get the number of columns.

pub fn is_empty(&self) -> bool

Check if there are no columns.

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

Get the index of a column by name.

pub fn name_at(&self, index: usize) -> Option<&str>

Get the name of a column by index.

pub fn contains(&self, name: &str) -> bool

Check if a column exists.

pub fn names(&self) -> &[String]

Get all column names.

Trait Implementations

impl Clone for ColumnInfo

fn clone(&self) -> ColumnInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnInfo

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

Formats the value using the given formatter.