Struct MigrationStatement 

pub struct MigrationStatement<'a> { /* private fields */ }

A migration step pairing a DDL Statement with the [Schema] it applies against.

Each MigrationStatement carries a snapshot of the schema at the point where the statement should be serialized. This is necessary because rename and recreation operations modify the schema as they go.

Implementations

impl<'a> MigrationStatement<'a>

pub fn from_diff( schema_diff: &'a SchemaDiff<'a>, capability: &Capability, ) -> Vec<Self>

Generates migration statements from a [SchemaDiff].

Walks the diff’s table, column, and index changes and produces the corresponding DDL statements. On databases that lack ALTER COLUMN support (e.g. SQLite), column type changes trigger a full table recreation sequence.

pub fn statement(&self) -> &Statement

Returns the DDL statement for this migration step.

pub fn schema(&self) -> &Schema

Returns the schema snapshot this statement should be serialized against.