apache-arrow
Version:
Apache Arrow columnar in-memory format
31 lines (30 loc) • 1.23 kB
TypeScript
import * as flatbuffers from 'flatbuffers';
/**
* ----------------------------------------------------------------------
* Data structures for describing a table row batch (a collection of
* equal-length Arrow arrays)
* Metadata about a field at some level of a nested type tree (but not
* its children).
*
* For example, a List<Int16> with values `[[1, 2, 3], null, [4], [5, 6], null]`
* would have {length: 5, null_count: 2} for its List node, and {length: 6,
* null_count: 0} for its Int16 node, as separate FieldNode structs
*/
export declare class FieldNode {
bb: flatbuffers.ByteBuffer | null;
bb_pos: number;
__init(i: number, bb: flatbuffers.ByteBuffer): FieldNode;
/**
* The number of value slots in the Arrow array at this level of a nested
* tree
*/
length(): bigint;
/**
* The number of observed nulls. Fields with null_count == 0 may choose not
* to write their physical validity bitmap out as a materialized buffer,
* instead setting the length of the bitmap buffer to 0.
*/
nullCount(): bigint;
static sizeOf(): number;
static createFieldNode(builder: flatbuffers.Builder, length: bigint, null_count: bigint): flatbuffers.Offset;
}