Struct toql_core::sql_builder::select_stream::SelectStream

pub struct SelectStream { /* private fields */ }

SelectStream memorizes which fields and joined structs are selected.

It is needed for the deserialization trait FromRow. The selections can either come from the query or the preselections in the mapping. The number of selections does not correspond with the number of selected columns or expressions, because each join gets an additional selection. For the number of columns take (BuildResult::column_counter)crate::sql_builder::build_result::BuildResult::column_counter.

Implementations

impl SelectStream

pub fn new() -> Self

Create new stream.

pub fn push(&mut self, selection: Select)

Add select state at the end of the stream.

pub fn iter(&self) -> Iter<'_, Select>

Return iterator to the stream.

Trait Implementations

impl Debug for SelectStream

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

Formats the value using the given formatter.

impl Default for SelectStream

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq<SelectStream> for SelectStream

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

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

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

This method tests for !=.

impl StructuralPartialEq for SelectStream