Trait StreamChunkTestExt

pub trait StreamChunkTestExt {
    // Required methods
    fn from_pretty(_: &str) -> Self;
    fn valid(&self) -> bool;
    fn concat(_: Vec<StreamChunk>) -> StreamChunk;
    fn sort_rows(self) -> Self;
    fn gen_stream_chunks(
        _: usize,
        _: usize,
        _: &[DataType],
        _: &VarcharProperty,
    ) -> Vec<StreamChunk>;
    fn gen_stream_chunks_inner(
        _: usize,
        _: usize,
        _: &[DataType],
        _: &VarcharProperty,
        _: f64,
        _: f64,
    ) -> Vec<StreamChunk>;
}

Test utilities for StreamChunk.

Required Methods

fn from_pretty(_: &str) -> Self

Parse a chunk from string.

See also [DataChunkTestExt::from_pretty].

Format

The first line is a header indicating the column types. The following lines indicate rows within the chunk. Each line starts with an operation followed by values. NULL values are represented as ..

Example

use risingwave_common::array::StreamChunk;
use risingwave_common::array::stream_chunk::StreamChunkTestExt as _;
let chunk = StreamChunk::from_pretty(
    "  I I I I      // type chars
    U- 2 5 . .      // '.' means NULL
    U+ 2 5 2 6 D    // 'D' means deleted in visibility
    +  . . 4 8      // ^ comments are ignored
    -  . . 3 4",
);
//  ^ operations:
//     +: Insert
//     -: Delete
//    U+: UpdateInsert
//    U-: UpdateDelete

// type chars:
//     I: i64
//     i: i32
//     F: f64
//     f: f32
//     T: str
//    TS: Timestamp
//    TZ: Timestamptz
//   SRL: Serial
//   x[]: array of x
// <i,f>: struct

fn valid(&self) -> bool

Validate the StreamChunk layout.

fn concat(_: Vec<StreamChunk>) -> StreamChunk

Concatenate multiple StreamChunk into one.

Panics if chunks is empty.

fn sort_rows(self) -> Self

Sort rows.

fn gen_stream_chunks( _: usize, _: usize, _: &[DataType], _: &VarcharProperty, ) -> Vec<StreamChunk>

Generate num_of_chunks data chunks with type data_types, where each data chunk has cardinality of chunk_size. TODO(kwannoel): Generate different types of op, different vis.

fn gen_stream_chunks_inner( _: usize, _: usize, _: &[DataType], _: &VarcharProperty, _: f64, _: f64, ) -> Vec<StreamChunk>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl StreamChunkTestExt for StreamChunk