Struct Compounds 

pub struct Compounds {
    pub operands: Vec<Compound>,
}

Every compound operand chained onto one SELECT.

Unlike Combines this holds only the operands. SQLite’s ORDER BY and LIMIT sit after the last operand and always belong to the whole compound — there is no way to give one operand its own — so the statement’s single ORDER BY/LIMIT/OFFSET is already the combination’s, and no second set is needed.

Fields

operands: Vec<Compound>

The operands, applied left to right.

Implementations

impl Compounds

pub fn append_compound(&mut self, compound: Compound)

Append one operand.

pub fn is_empty(&self) -> bool

Whether nothing is compounded onto the statement.

A list of nothing but absent operands counts as empty, so the enclosing statement does not write the separator in front of a clause that renders nothing. A half-filled operand is not absent — it records a failure instead.

Trait Implementations

impl Clone for Compounds

fn clone(&self) -> Compounds

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Compounds

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

Formats the value using the given formatter.

impl Default for Compounds

fn default() -> Compounds

Returns the “default value” for a type.

impl Expression for Compounds

fn write_sql(&self, w: &mut SqlWriter<'_>)

Append this fragment to w.

impl HasCompounds for Compounds

fn compounds_mut(&mut self) -> &mut Compounds

The compound operands to modify.