Struct grafbase_sql_ast::ast::Values

pub struct Values<'a> { /* private fields */ }

An in-memory temporary table. Can be used in some of the databases in a place of an actual table. Doesn’t work in MySQL 5.7.

Implementations

impl<'a> Values<'a>

pub fn empty() -> Self

Create a new empty in-memory set of values.

pub fn new(rows: Vec<Row<'a>>) -> Self

Create a new in-memory set of values.

pub fn with_capacity(capacity: usize) -> Self

Create a new in-memory set of values with an allocated capacity.

pub fn push<T>(&mut self, row: T)

where T: Into<Row<'a>>,

Add value to the temporary table.

pub fn len(&self) -> usize

The number of rows in the in-memory table.

pub fn is_empty(&self) -> bool

True if has no rows.

pub fn row_len(&self) -> usize

pub fn flatten_row(self) -> Option<Row<'a>>

Trait Implementations

impl<'a> Clone for Values<'a>

fn clone(&self) -> Values<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Values<'a>

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

Formats the value using the given formatter.

impl<'a> Default for Values<'a>

fn default() -> Values<'a>

Returns the “default value” for a type.

impl<'a, I, R> From<I> for Values<'a>

where I: Iterator<Item = R>, R: Into<Row<'a>>,

fn from(rows: I) -> Self

Converts to this type from the input type.

impl<'a> From<Values<'a>> for Expression<'a>

fn from(value: Values<'a>) -> Self

Converts to this type from the input type.

impl<'a> IntoIterator for Values<'a>

type Item = Row<'a>

The type of the elements being iterated over.

type IntoIter = IntoIter<<Values<'a> as IntoIterator>::Item>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<'a> PartialEq for Values<'a>

fn eq(&self, other: &Values<'a>) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

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

impl<'a> StructuralPartialEq for Values<'a>