Struct RawCtxTableColumnBuilder 

pub struct RawCtxTableColumnBuilder { /* private fields */ }

Builder for individual table columns referenced by a table schema.

Implementations

impl RawCtxTableColumnBuilder

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

Create a column builder for the specified column name.

pub fn utf8(name: impl Into<String>) -> Self

Convenience constructor for UTF-8 string columns.

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

Convenience constructor for raw bytes columns.

pub fn base64(name: impl Into<String>) -> Self

Convenience constructor for base64-encoded binary columns.

pub fn float64(name: impl Into<String>) -> Self

Convenience constructor for float64 columns.

pub fn float32(name: impl Into<String>) -> Self

Convenience constructor for float32 columns.

pub fn int64(name: impl Into<String>) -> Self

Convenience constructor for int64 columns.

pub fn int32(name: impl Into<String>) -> Self

Convenience constructor for int32 columns.

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

Convenience constructor for boolean columns.

pub fn decoder(self, decoder: impl Into<String>) -> Self

Override the column decoder used when normalising values (json, utf8, …).

pub fn option(self, key: impl Into<String>, value: JsonValue) -> Self

Attach decoder-specific options (stored under options).

pub fn default_value(self, value: JsonValue) -> Self

Provide a fallback value used when column data is missing.

pub fn optional(self, optional: bool) -> Self

Mark the column optional (missing entries use default or None).

pub fn dtype(self, dtype: impl Into<String>) -> Self

Declare the logical dtype associated with the column (e.g. string, float64).

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

Indicate whether the column permits null values.

pub fn schema_metadata(self, metadata: JsonValue) -> Self

Attach additional schema metadata to the column.

pub fn shape<I>(self, shape: I) -> Self

where I: Into<Vec<usize>>,

Record an expected shape for vector-valued columns.

pub fn manifest(self, manifest: JsonValue) -> Self

Associate manifest-derived hints with the column (e.g. upstream dataset name).

pub fn manifest_column(self, column: impl Into<String>) -> Self

Convenience helper for binding a manifest column name.

Trait Implementations

impl Clone for RawCtxTableColumnBuilder

fn clone(&self) -> RawCtxTableColumnBuilder

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RawCtxTableColumnBuilder

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

Formats the value using the given formatter.