Make sum

Author: JakeRoggenbuck

simple_tester.py

@@ -26,3 +26,6 @@
 for rec in recs:
     vals = query.select(rec, 0, [0])
     print(vals)
+
+for x in range(0, 8):
+    print(f"query.sum(13, 17, {x})", query.sum(13, 17, x))

src/database.rs

@@ -112,7 +112,10 @@ impl RTable {
 
     pub fn sum(&mut self, start: u64, end: u64, col_index: u64) -> i64 {
         let mut agg = 0i64;
-        for rid in start..end {
+
+        // Make sum range inclusive
+        // TODO: Validate this assumption if it should actually be inclusive
+        for rid in start..end + 1 {
             if let Some(v) = self.read(rid) {
                 agg += v[col_index as usize] as i64;
             }