Struct VirtualDataSlice 

pub struct VirtualDataSlice { /* private fields */ }

A columnar data slice returned from a virtual server view query.

This struct represents a rectangular slice of data from a view, stored internally as Arrow builders during population and frozen into a RecordBatch on first consumption.

Implementations

impl VirtualDataSlice

pub fn new(config: ViewConfig) -> Self

pub fn from_arrow_ipc(&mut self, ipc: &[u8]) -> Result<(), Box<dyn Error>>

Loads data from Arrow IPC file format bytes, with automatic post-processing based on the view configuration.

When group_by is active, extracts __GROUPING_ID__ and __ROW_PATH_N__ columns to build self.row_path, then removes them from the output RecordBatch.

When split_by is active, renames data columns by replacing _ with | (the DuckDB PIVOT separator).

Also coerces non-standard Arrow types (e.g. Decimal128, Int64) to Perspective-compatible types.

pub fn render_to_columns_json(&mut self) -> Result<String, Box<dyn Error>>

Serializes the data to a column-oriented JSON string.

pub fn set_col<T: SetVirtualDataColumn>( &mut self, name: &str, grouping_id: Option<usize>, index: usize, value: T, ) -> Result<(), Box<dyn Error>>

Sets a value in a column at the specified row index.

If group_by_index is Some, the value is added to the __ROW_PATH__ column as part of the row’s group-by path. Otherwise, the value is inserted into the named column.

Creates the column if it does not already exist.

Trait Implementations

impl Debug for VirtualDataSlice

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

Formats the value using the given formatter.