Enum SubLinkKind 

pub enum SubLinkKind {
    Exists,
    All,
    Any,
    Expr,
    Array,
    RowCompare,
    Multi {
        id: u32,
        column: usize,
    },
}

The kinds of SubLink that the analyzer takes.

Variants

Exists

EXISTS (SELECT ...).

All

x op ALL (SELECT ...).

Any

x op ANY (SELECT ...) and x IN (SELECT ...).

Expr

(SELECT ...), which gives the value of the one column of the one row.

Array

ARRAY(SELECT ...), which gives the values of the one column as an array.

RowCompare

(a, b) op (SELECT ...), which gives the result of the test on the one row.

Multi

SET (a, b) = (SELECT ...) of UPDATE, as MULTIEXPR_SUBLINK with its PARAM_MULTIEXPR: the value of the column column, from 0, of the one row. Each column of the item has a copy of the subquery with the same id, and the subquery runs once for each row.

Fields

id: u32

column: usize

Trait Implementations

impl Clone for SubLinkKind

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SubLinkKind

impl Debug for SubLinkKind

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

Formats the value using the given formatter.

impl Eq for SubLinkKind

impl PartialEq for SubLinkKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SubLinkKind