Struct ResultSchema 

pub struct ResultSchema { /* private fields */ }

Schema information for a query result.

Provides metadata about the columns returned by a query, including column names and types.

Implementations

impl ResultSchema

pub fn new() -> Self

Creates a new empty result schema.

pub fn from_columns(columns: Vec<ResultColumn>) -> Self

Creates a result schema from column definitions.

pub fn add_column(&mut self, name: impl Into<String>, sql_type: SqlType)

Adds a column to the schema.

pub fn column_count(&self) -> usize

Returns the number of columns.

pub fn columns(&self) -> &[ResultColumn]

Returns all columns.

pub fn column(&self, index: usize) -> &ResultColumn

Returns the column at the given index.

Panics

Panics if the index is out of bounds.

pub fn column_by_name(&self, name: &str) -> Option<&ResultColumn>

Returns the column with the given name, if it exists.

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

Returns the index of the column with the given name, if it exists.

Trait Implementations

impl Clone for ResultSchema

fn clone(&self) -> ResultSchema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResultSchema

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

Formats the value using the given formatter.

impl Default for ResultSchema

fn default() -> ResultSchema

Returns the “default value” for a type.