Struct SetOp 

pub struct SetOp {
    pub kind: SetKind,
    pub all: bool,
    pub left: SetTree,
    pub right: SetTree,
    pub columns: Vec<(u32, i32)>,
    pub groups: Vec<SortGroup>,
    pub work: Option<usize>,
    pub project: Vec<Expr>,
}

An operation of the tree, as SetOperationStmt.

Fields

kind: SetKind

all: bool

ALL: the operation keeps the rows that are equal.

left: SetTree

right: SetTree

columns: Vec<(u32, i32)>

The type and the typmod of each column of the result.

groups: Vec<SortGroup>

The operators that find the equal rows, one for each column, as groupClauses. UNION ALL has none.

work: Option<usize>

For the UNION of a recursive query of WITH, as RecursiveUnion, the number of the work table that the reference of the recursive term reads. The right side runs again with the rows of the last step in the work table until it gives no new rows.

project: Vec<Expr>

The casts of the columns of the operation to the types of the operation above it, which the planner fills for EXPLAIN: a Result above the plan of the operation computes them, as recurse_set_operations adds it. Each cast reads the column of the leftmost SELECT. Empty when the types are the same.

Trait Implementations

impl Clone for SetOp

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SetOp

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

Formats the value using the given formatter.

impl PartialEq for SetOp

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SetOp