Struct JsonStats 

pub struct JsonStats {
    pub is_array: bool,
    pub array_length: Option<usize>,
    pub top_level_keys: Vec<String>,
    pub nested_depth: usize,
    pub unique_values_sample: HashMap<String, Vec<String>>,
    pub cardinality_estimates: HashMap<String, usize>,
    pub preview: String,
}

Statistics for JSON files

Fields

is_array: bool

Whether the root is an array

array_length: Option<usize>

Length if it’s an array

top_level_keys: Vec<String>

Top-level keys (for objects) or sample element keys (for arrays)

nested_depth: usize

Maximum nesting depth

unique_values_sample: HashMap<String, Vec<String>>

Sample of unique values for interesting fields (max 5 values each)

cardinality_estimates: HashMap<String, usize>

Estimated cardinality for fields with many unique values

preview: String

Preview of first few elements/properties (as JSON string)

Implementations

impl JsonStats

pub fn summary(&self) -> String

pub fn context_info(&self) -> String

Trait Implementations

impl Clone for JsonStats

fn clone(&self) -> JsonStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JsonStats

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for JsonStats

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for JsonStats

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 JsonStats

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for JsonStats

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 JsonStats