Enum AlterTableTarget 

pub enum AlterTableTarget {
    SetHotTierBytes(u64),
    AddForeignKey(ForeignKeyConstraint),
    DropForeignKey(String),
}

Variants

SetHotTierBytes(u64)

Per-table hot-tier byte budget override. The freezer reads this before falling back to SPG_HOT_TIER_BYTES.

AddForeignKey(ForeignKeyConstraint)

v7.6.8 — ALTER TABLE t ADD CONSTRAINT name FOREIGN KEY (cols) REFERENCES parent[(pcols)] [ON DELETE/UPDATE …]. Engine validates existing rows against the new constraint before installing it.

DropForeignKey(String)

v7.6.8 — ALTER TABLE t DROP CONSTRAINT name. Removes the constraint by user-supplied name; raises if no FK with that name exists on the table.

Trait Implementations

impl Clone for AlterTableTarget

fn clone(&self) -> AlterTableTarget

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AlterTableTarget

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

Formats the value using the given formatter.

impl PartialEq for AlterTableTarget

fn eq(&self, other: &AlterTableTarget) -> 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 StructuralPartialEq for AlterTableTarget