Struct BatchSizeConfig 

pub struct BatchSizeConfig {
    pub size: usize,
    pub strategy: BatchStrategy,
}

批量大小配置

对应 Hibernate @BatchSize(size = 100) 注解。

Fields

size: usize

每批数量

strategy: BatchStrategy

抓取策略

Implementations

impl BatchSizeConfig

pub fn new(size: usize, strategy: BatchStrategy) -> BatchSizeConfig

创建配置

pub fn with_size(size: usize) -> BatchSizeConfig

创建默认策略的配置（IN）

pub fn batch_count(&self, total: usize) -> usize

计算给定总数需要分多少批

示例

use sz_orm_query::entity_graph::BatchSizeConfig;

let config = BatchSizeConfig::with_size(100);
assert_eq!(config.batch_count(0), 0);
assert_eq!(config.batch_count(1), 1);
assert_eq!(config.batch_count(100), 1);
assert_eq!(config.batch_count(101), 2);
assert_eq!(config.batch_count(250), 3);

pub fn batch_range(&self, batch_index: usize, total: usize) -> Range<usize>

返回第 batch_index 批的范围（start..end，end 不超过 total）

示例

use sz_orm_query::entity_graph::BatchSizeConfig;

let config = BatchSizeConfig::with_size(100);
assert_eq!(config.batch_range(0, 250), 0..100);
assert_eq!(config.batch_range(1, 250), 100..200);
assert_eq!(config.batch_range(2, 250), 200..250);

Trait Implementations

impl Clone for BatchSizeConfig

fn clone(&self) -> BatchSizeConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BatchSizeConfig

impl Debug for BatchSizeConfig

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

Formats the value using the given formatter.

impl Default for BatchSizeConfig

fn default() -> BatchSizeConfig

Returns the “default value” for a type.