risingwave_frontend::handler::alter_table_column

Function get_replace_table_plan

source 
pub async fn get_replace_table_plan(
    session: &Arc<SessionImpl>,
    table_name: ObjectName,
    new_definition: Statement,
    old_catalog: &Arc<TableCatalog>,
    new_version_columns: Option<Vec<ColumnCatalog>>,
) -> Result<(Option<Source>, Table, StreamFragmentGraph, ColIndexMapping, TableJobType), RwError>