Add splice ranges back to diagnose problem

Author: danieljbruce

src/table.ts

@@ -811,7 +811,40 @@ Please use the format 'prezzy' or '${instance.name}/tables/prezzy'.`);
       };
 
       if (lastRowKey) {
-        TableUtils.spliceRanges(ranges, lastRowKey);
+        const lessThanOrEqualTo = (lhs: string, rhs: string) =>
+          !TableUtils.greaterThan(lhs, rhs);
+
+        // Readjust and/or remove ranges based on previous valid row reads.
+        // Iterate backward since items may need to be removed.
+        for (let index = ranges.length - 1; index >= 0; index--) {
+          const range = ranges[index];
+          const startValue = is.object(range.start)
+            ? (range.start as BoundData).value
+            : range.start;
+          const endValue = is.object(range.end)
+            ? (range.end as BoundData).value
+            : range.end;
+          const startKeyIsRead =
+            !startValue ||
+            lessThanOrEqualTo(startValue as string, lastRowKey as string);
+          const endKeyIsNotRead =
+            !endValue ||
+            (endValue as Buffer).length === 0 ||
+            TableUtils.lessThan(lastRowKey as string, endValue as string);
+          if (startKeyIsRead) {
+            if (endKeyIsNotRead) {
+              // EndKey is not read, reset the range to start from lastRowKey open
+              range.start = {
+                value: lastRowKey,
+                inclusive: false,
+              };
+            } else {
+              // EndKey is read, remove this range
+              ranges.splice(index, 1);
+            }
+          }
+        }
+
         rowKeys = TableUtils.getRowKeys(rowKeys, lastRowKey);
 
         // If there was a row limit in the original request and