Function alter_table_alter_columns 

pub async fn alter_table_alter_columns(
    configuration: &Configuration,
    id: &str,
    alter_table_alter_columns_request: AlterTableAlterColumnsRequest,
    delimiter: Option<&str>,
) -> Result<AlterTableAlterColumnsResponse, Error<AlterTableAlterColumnsError>>

Modify existing columns in table id, such as renaming or changing data types.