Enum MergeMatchKind 

pub enum MergeMatchKind {
    Matched,
    NotMatched {
        by_target: bool,
    },
    NotMatchedBySource,
}

Which WHEN form a MergeWhen is.

Variants

Matched

WHEN MATCHED — the source row found a target row.

NotMatched

WHEN NOT MATCHED [ BY TARGET ] — the source row found no target row.

BY TARGET spells out the default; it exists (PostgreSQL 17+) to read well next to BY SOURCE, and is written only when asked for — see the OFFSET/FETCH entry in docs/sql-rendering.md for the rule.

Fields

by_target: bool

Whether to write the explicit BY TARGET (PostgreSQL 17+).

NotMatchedBySource

WHEN NOT MATCHED BY SOURCE — the target row has no source row (PostgreSQL 17+).

Implementations

impl MergeMatchKind

pub fn as_str(self) -> &'static str

The clause head, as written.

Trait Implementations

impl Clone for MergeMatchKind

fn clone(&self) -> MergeMatchKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MergeMatchKind

impl Debug for MergeMatchKind

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

Formats the value using the given formatter.

impl Eq for MergeMatchKind

impl PartialEq for MergeMatchKind

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for MergeMatchKind