spg-engine 7.37.21

Execution engine for SPG: glues spg-sql parsing to spg-storage. Foreign keys, joins, vectors, cold tier.
Documentation 
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//! v7.38 (read01) — numeric literals accept `_` digit separators between
//! digits (PG 16+): 1_000, 1_000_000, 1_000.5, 1_0e3. Oracle: live PG 18.4.

use spg_engine::{Engine, QueryResult};

fn text(e: &mut Engine, sql: &str) -> String {
    match e.execute(sql).unwrap() {
        QueryResult::Rows { rows, .. } => match &rows[0].values[0] {
            spg_storage::Value::Int(n) => n.to_string(),
            spg_storage::Value::BigInt(n) => n.to_string(),
            spg_storage::Value::Float(x) => x.to_string(),
            spg_storage::Value::Text(s) => s.to_string(),
            v => spg_engine::eval::value_to_text(v),
        },
        _ => panic!("expected rows"),
    }
}

#[test]
fn underscore_digit_separators() {
    let mut e = Engine::new();
    assert_eq!(text(&mut e, "SELECT 1_000"), "1000");
    assert_eq!(text(&mut e, "SELECT 1_000_000"), "1000000");
    assert_eq!(text(&mut e, "SELECT (1_000.5)::text"), "1000.5");
    assert_eq!(text(&mut e, "SELECT 1_0e3"), "10000");
    // No separator unchanged; `..` range / subscript unaffected.
    assert_eq!(text(&mut e, "SELECT 1000"), "1000");
    assert_eq!(text(&mut e, "SELECT ((ARRAY[10,20,30])[1])::text"), "10");
}

#[test]
fn non_decimal_integer_literals() {
    let mut e = Engine::new();
    // PG 16+ hex / octal / binary integer literals (with optional _ separators).
    assert_eq!(text(&mut e, "SELECT 0x10"), "16");
    assert_eq!(text(&mut e, "SELECT 0xFF"), "255");
    assert_eq!(text(&mut e, "SELECT 0o17"), "15");
    assert_eq!(text(&mut e, "SELECT 0b101"), "5");
    assert_eq!(text(&mut e, "SELECT 0x_FF"), "255");
    assert_eq!(text(&mut e, "SELECT 0xFFFFFFFFFF"), "1099511627775");
    // Plain decimal / zero unaffected.
    assert_eq!(text(&mut e, "SELECT 0"), "0");
    assert_eq!(text(&mut e, "SELECT (0.5)::text"), "0.5");
}