Struct ColumnProfile 

pub struct ColumnProfile {
    pub rows: u64,
    pub present: u64,
    pub nulls: u64,
    pub null_rate: f64,
    pub types: TypeCounts,
    pub distinct: u64,
    pub numeric: Option<NumericSummary>,
    pub string: Option<StringSummary>,
    pub top_values: Option<Vec<TopValue>>,
    pub high_cardinality: bool,
}

The learned profile of one column over one run.

Fields

rows: u64

Records the run wrote (the denominator of null_rate).

present: u64

Records in which the column was present (including explicit nulls).

nulls: u64

Records where the column was absent or null.

null_rate: f64

nulls / rows (0 when no rows).

types: TypeCounts

distinct: u64

Estimated distinct non-null values (HyperLogLog, ~1.6 % error).

numeric: Option<NumericSummary>

string: Option<StringSummary>

top_values: Option<Vec<TopValue>>

Most frequent values, count descending. Absent for high-cardinality columns and when top_values: 0.

high_cardinality: bool

The estimated distinct count exceeded categorical_max_distinct, so no values are published for this column.

Implementations

impl ColumnProfile

pub fn non_null(&self) -> u64

Non-null values observed.

Trait Implementations

impl Clone for ColumnProfile

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnProfile

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ColumnProfile

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for ColumnProfile

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for ColumnProfile

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for ColumnProfile

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ColumnProfile