Enum CollationChange 

pub enum CollationChange {
    Create(Collation),
    Drop {
        qname: QualifiedName,
    },
    Rename {
        from: QualifiedName,
        to: Identifier,
    },
    Replace {
        from: Collation,
        to: Collation,
    },
    CommentOn {
        qname: QualifiedName,
        comment: Option<String>,
    },
}

A structural change to a single collation.

Variants

Create(Collation)

CREATE COLLATION ...

Drop

DROP COLLATION qname — destructive.

Emitted by diff_schemas when dropping a schema that contains collations: PG error 2BP01 fires if DROP SCHEMA X executes while collations in X are still live.

Not emitted by diff_collations directly — collations are lenient there (no auto-drop for target-only collations; unmanaged drift surfaces via the unmanaged-collation lint instead).

Fields

qname: QualifiedName

Schema-qualified collation name.

Rename

ALTER COLLATION qname RENAME TO new_name.

Not emitted by the differ: rename intent is not structurally derivable from name-mismatched-but-same-shape collations (the user could equally have meant drop-old + create-new). This variant exists for the parser and future explicit-rename use cases.

Fields

from: QualifiedName

Existing qname.

to: Identifier

New unqualified name (same schema).

Replace

DROP COLLATION old; CREATE COLLATION new; — PG has no in-place ALTER for provider / locale / deterministic.

Fields

from: Collation

The collation as it exists in the target.

to: Collation

The collation as it should exist in the source.

CommentOn

COMMENT ON COLLATION qname IS '...'.

Fields

qname: QualifiedName

Schema-qualified collation name.

comment: Option<String>

New comment (None clears).

Trait Implementations

impl Clone for CollationChange

fn clone(&self) -> CollationChange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CollationChange

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CollationChange

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for CollationChange

impl PartialEq for CollationChange

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for CollationChange

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for CollationChange