Function write_test_segment

nodedb-columnar/src/reader/block_decode.rs:310–336

(rows: usize)

    use crate::writer::SegmentWriter;

    fn write_test_segment(rows: usize) -> Vec<u8> {
        let schema = ColumnarSchema::new(vec![
            ColumnDef::required("id", ColumnType::Int64).with_primary_key(),
            ColumnDef::required("name", ColumnType::String),
            ColumnDef::nullable("score", ColumnType::Float64),
        ])
        .expect("valid");

        let mut mt = ColumnarMemtable::new(&schema);
        for i in 0..rows {
            mt.append_row(&[
                Value::Integer(i as i64),
                Value::String(format!("user_{i}")),
                if i % 5 == 0 {
                    Value::Null
                } else {
                    Value::Float(i as f64 * 0.5)
                },
            ])
            .expect("append");
        }

        let (schema, columns, row_count) = mt.drain();
        SegmentWriter::plain()
            .write_segment(&schema, &columns, row_count, None)
            .expect("write")
    }

    // ── ResolvedColumnCodec reader tests ──────────────────────────────────────