Struct Population 

pub struct Population {
    pub driver: Table,
    pub keys: Vec<String>,
    pub data: Vec<(Table, HashMap<String, Vec<u32>>)>,
    pub orphan_rows: u64,
    pub orphan_keys: u64,
    pub orphan_samples: Vec<String>,
    /* private fields */
}

The population of a per-row output.

Fields

driver: Table

keys: Vec<String>

Each driver row’s key, shown (a_b for a composite key), in driver order.

data: Vec<(Table, HashMap<String, Vec<u32>>)>

Each data query, and its rows by key (index form).

orphan_rows: u64

Rows of data queries whose key isn’t in the driver: how many, how many keys, and up to 10 of them.

orphan_keys: u64

orphan_samples: Vec<String>

Implementations

impl Population

pub fn build( driver: Table, data: Vec<Table>, key: &[String], ) -> Result<Population, String>

Index the driver and each data query by key. A duplicate driver key is an error.

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn slices(&self, i: usize) -> Result<Vec<RecordBatch>, String>

Row i’s slice of each data query, in order.

pub fn slice_len(&self, i: usize, q: usize) -> u64

How many rows of data query q row i has.

pub fn driver_row(&self, i: usize) -> RecordBatch

Row i of the driver, as a one-row batch.