scirs2_io/database/
bulk.rs

1//! Bulk operations for databases
2
3use crate::database::{DatabaseConnection, QueryBuilder};
4use crate::error::Result;
5use scirs2_core::ndarray::ArrayView2;
6
7/// Bulk insert configuration
8#[derive(Debug, Clone)]
9pub struct BulkInsertConfig {
10    pub batch_size: usize,
11    pub commit_interval: Option<usize>,
12    pub on_conflict: ConflictStrategy,
13}
14
15#[derive(Debug, Clone, Copy)]
16pub enum ConflictStrategy {
17    Ignore,
18    Replace,
19    Error,
20}
21
22impl Default for BulkInsertConfig {
23    fn default() -> Self {
24        Self {
25            batch_size: 1000,
26            commit_interval: Some(10000),
27            on_conflict: ConflictStrategy::Error,
28        }
29    }
30}
31
32/// Perform bulk insert with batching
33pub fn bulk_insert(
34    conn: &dyn DatabaseConnection,
35    table: &str,
36    data: ArrayView2<f64>,
37    columns: &[&str],
38    config: &BulkInsertConfig,
39) -> Result<usize> {
40    let mut total_inserted = 0;
41    let row_count = data.nrows();
42
43    for chunk_start in (0..row_count).step_by(config.batch_size) {
44        let chunk_end = (chunk_start + config.batch_size).min(row_count);
45        let chunk = data.slice(scirs2_core::ndarray::s![chunk_start..chunk_end, ..]);
46
47        total_inserted += conn.insert_array(table, chunk, columns)?;
48
49        if let Some(interval) = config.commit_interval {
50            if total_inserted % interval == 0 {
51                // In a real implementation, we'd commit the transaction here
52            }
53        }
54    }
55
56    Ok(total_inserted)
57}
58
59/// Bulk update using a temporary table strategy
60pub fn bulk_update(
61    conn: &dyn DatabaseConnection,
62    table: &str,
63    data: ArrayView2<f64>,
64    key_columns: &[&str],
65    value_columns: &[&str],
66) -> Result<usize> {
67    // This is a stub implementation
68    // In production, this would:
69    // 1. Create a temporary table
70    // 2. Bulk insert into temp table
71    // 3. Perform UPDATE...FROM or MERGE
72    // 4. Drop temp table
73    conn.insert_array(table, data, &[key_columns, value_columns].concat())
74}
scirs2_io/database/bulk.rs

scirs2_io/database/
bulk.rs
