Spider2lite local331 has too many potential answers due to ordering/timebreaker logic

[ritahuja]

local331 asks: Which three distinct third-page visits are most frequently observed immediately after two consecutive visits to the '/detail' page, and how many times does each third-page visit occur?

Problem: in the log dataset The timestamp value is probably missing some precision (microseconds?) → a lot of the value are the same so the ordering of the calculation really depends on how the database handles same value ordering

• The task asks for “third-page visits immediately after two consecutive /detail visits,” but the log stores many events with identical stamp, path, option_name, and action (see sample rows printed by local331_ordering_probe.py, noting repeated /search_list and /detail entries at the same timestamp).
• Because the SQL window ordering only sorts by those duplicated columns, databases are free to emit any physical row order; Oracle may return / or /confirm for the same triple depending on ROWID, fetch plan, or reproduction order.
• Since no unique event key or ingestion sequence exists, any change in tie-breaking (adding ROWID, ordering by session_id+ROWID, etc.) can legitimately reshuffle doubles, so “top three third pages” has multiple valid answers.

Conclusion: need a deterministic event key (e.g., a monotonic ID or precise timestamp) and explicitly specify the tie-break to use in the window ORDER BY.

Attached python file shows these issues with SQL queries you can run to
local331_ordering_probe.py

The output is

python analysis/local331_ordering_probe.py --schema LOG --write-csv

=== Sample ordered log rows (limit 20) ===
session_id               stamp           path option_name action
  0fe39581 2017-01-09 12:18:43   /search_list      search   view
  0fe39581 2017-01-09 12:18:43   /search_list      search   view
  0fe39581 2017-01-09 12:18:43   /search_list      search   view
  0fe39581 2017-01-09 12:18:43   /search_list      search   view
  0fe39581 2017-01-09 12:18:43   /search_list      search   view
  0fe39581 2017-01-09 12:18:43  /search_list/      search   view
  0fe39581 2017-01-09 12:18:43  /search_list/      search   view
  111f2996 2017-01-09 12:18:43   /search_list      search   view
  111f2996 2017-01-09 12:18:43   /search_list      search   view
  111f2996 2017-01-09 12:18:43   /search_list      search   view
  111f2996 2017-01-09 12:18:43   /search_list      search   view
  111f2996 2017-01-09 12:18:43   /search_list      search   view
  111f2996 2017-01-09 12:18:43  /search_list/      search   view
  111f2996 2017-01-09 12:18:43  /search_list/      search   view
  111f2996 2017-01-09 12:19:11  /search_input        page   view
  111f2996 2017-01-09 12:19:11  /search_input        page   view
  111f2996 2017-01-09 12:19:11  /search_input        page   view
  111f2996 2017-01-09 12:19:11  /search_input        page   view
  111f2996 2017-01-09 12:19:11  /search_input        page   view
  111f2996 2017-01-09 12:19:11 /search_input/        page   view

=== Original log query (ties by stamp/path/option/action) ===
third_page  occurrences
   /detail           57
         /            2
    /input            1
Saved result to analysis_outputs/local331_original.csv

=== RowID tie-breaker variant ===
third_page  occurrences
   /detail           55
  /confirm            1
    /input            1
Saved result to analysis_outputs/local331_rowid.csv

=== Ignore-session variant (global ordering) ===
  third_page  occurrences
     /detail           69
/search_list            4
Saved result to analysis_outputs/local331_ignore_session.csv

=== Detail-detail-detail streak counts per session ===
session_id  streaks
  87b5725f       10
  1cf7678e        5
  36dd0df7        5
  3efe001c        5
  5d5b0997        5
  5eb2e107        5
  9afaf87c        5
  d45ec190        5
  eee2bb21        5
  fe05e1d8        5
Saved result to analysis_outputs/local331_streaks.csv

Summary:
Original query rows: 3
RowID variant rows: 3
Ignore-session rows: 2
Detail streak entries: 10

Differences between original and rowid variants:
third_page  occurrences_orig  occurrences_rowid
         /               2.0                0.0
  /confirm               0.0                1.0
   /detail              57.0               55.0
    /input               1.0                1.0

Ambiguity Evidence

• analysis_outputs/local331_original.csv:1 (log replay ordering by timestamp, path, option, action) yields /detail 57, / 2, /input 1.
• Imposing a deterministic tie-breaker with ROWID flips the result to /detail 55, /confirm 1, /input 1 (analysis_outputs/local331_rowid.csv:1).
• Comparing both variants highlights 28 triple positions where the third page differs (analysis/local331_ordering_probe.py diff printout during the run), proving identical timestamps and identical path/option_name/action values leave row order unsettled.
• Removing session partitions entirely (still using timestamp+ROWID) creates yet another answer: /detail 69, /search_list 4 (analysis_outputs/local331_ignore_session.csv:1).
• Triple streak counts top out at 55 across sessions (analysis_outputs/local331_streaks.csv:1), so any total above 55 must stem from ordering, not real additional events.