fn optimize_mir_local(
expr: MirRelationExpr,
ctx: &mut TransformCtx<'_>,
) -> Result<OptimizedMirRelationExpr, OptimizerError>fn optimize_mir_local(
expr: MirRelationExpr,
ctx: &mut TransformCtx<'_>,
) -> Result<OptimizedMirRelationExpr, OptimizerError>