Struct DataColumn 

pub struct DataColumn {
    pub name: String,
    pub data_type: DataType,
    pub nullable: bool,
    pub unique_values: Option<usize>,
    pub null_count: usize,
    pub metadata: HashMap<String, String>,
    pub qualified_name: Option<String>,
    pub source_table: Option<String>,
}

Column metadata and definition

Fields

name: String

data_type: DataType

nullable: bool

unique_values: Option<usize>

null_count: usize

metadata: HashMap<String, String>

qualified_name: Option<String>

Qualified name with table prefix (e.g., “messages.field_name”)

source_table: Option<String>

Source table or CTE name

Implementations

impl DataColumn

pub fn new(name: impl Into<String>) -> Self

pub fn with_type(self, data_type: DataType) -> Self

pub fn with_qualified_name(self, table_name: &str) -> Self

Set the qualified name (table.column format)

pub fn get_qualified_or_simple_name(&self) -> &str

Get the qualified name if available, otherwise return the simple name

pub fn with_nullable(self, nullable: bool) -> Self

Trait Implementations

impl Clone for DataColumn

fn clone(&self) -> DataColumn

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataColumn

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DataColumn

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for DataColumn

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

where __S: Serializer,

Serialize this value into the given Serde serializer.