q1135

R-ORD GOLD-ONLY not-a-function-of-the-data

european_football_2 · mini_dev_postgresql from https://bird-bench.oss-cn-beijing.aliyuncs.com/minidev.zip (sha256 cc48ba16838204e4e214512030cb572eeb5f7bcdd999bae4b9b6ff12ec13b92f, downloaded 2026-09-07), member minidev/MINIDEV/mini_dev_postgresql.json

The question

Please provide top four football players' IDs who are among the lowest potential players and prefer to use the right foot when attacking.

the hint the set supplies: lowest potential players refers to MIN(potential); prefer to use the right foot when attacking refers to preferred_foot = 'right'

This question was audited without a prediction beside it, so there is nothing to compare the gold with. The probes below read the gold alone.

The statements

gold

SELECT id FROM Player_Attributes WHERE preferred_foot = 'right' ORDER BY potential ASC NULLS LAST LIMIT 4
potential
ascending

sha256:fa047e4fdc77cbeaa46f8672d4b875c8b614b3935687950b2d88b10903652575

The results

gold, 4 rows

from evidence-gold.json, 4 rows

idint8
132236
132235
66213
66214

The probes

A smell is a mechanical reason to read this gold statement again. It is a heuristic: it does not state that the statement is wrong, and a maintainer decides.

ordering-over-numeric-text not applicable

this statement orders by a text column holding only numbers, and ordering it as a number gives a different answer, so the gold may be sorting 9.5 above 10

no ORDER BY key resolves to a text column

what it measured 
{
  "heuristic": true,
  "reason": "no ORDER BY key resolves to a text column",
  "keys": [
    {
      "key": "potential",
      "column": "player_attributes.potential",
      "declared_type": "bigint",
      "not_applicable": "the column is not declared as text"
    }
  ]
}

arbitrary-cut quiet

this statement cuts its result at a LIMIT that does not decide which rows come back, so a different but equally correct statement can return other rows and score zero

what it measured 
{
  "heuristic": true,
  "cut": 4,
  "offset": 0,
  "distinct_kept": false,
  "unbounded_sql": "SELECT id, potential AS attestql_ordering_key_0 FROM player_attributes WHERE preferred_foot = 'right' ORDER BY potential ASC NULLS LAST",
  "unbounded_rows": 138409,
  "projected_columns": [
    "id"
  ],
  "ordering_key_columns": [
    "attestql_ordering_key_0"
  ],
  "ordering_keys": [
    {
      "key": "potential",
      "direction": "asc",
      "nulls": "last",
      "nulls_first_in_effect": false,
      "returned_rows_null_in_this_key": 0,
      "fires": false
    }
  ],
  "case": null
}

not-a-function-of-the-data fired

rerun over the same rows in another physical order this statement gives another answer, so its result depends on how the rows are stored and not only on the data

from smells.json, 4 rows

132235
132236
66213
66214
what it measured 
{
  "heuristic": true,
  "rule": "R-ORD",
  "baseline_result_hash": "sha256:fa047e4fdc77cbeaa46f8672d4b875c8b614b3935687950b2d88b10903652575",
  "baseline_result": {
    "columns": [
      {
        "name": "id",
        "declared_type": "int8"
      }
    ],
    "row_count": 4,
    "truncated": false,
    "rows_shown": 4,
    "rows": [
      [
        {
          "type": "int",
          "value": 132236
        }
      ],
      [
        {
          "type": "int",
          "value": 132235
        }
      ],
      [
        {
          "type": "int",
          "value": 66213
        }
      ],
      [
        {
          "type": "int",
          "value": 66214
        }
      ]
    ],
    "result_hash": "sha256:fa047e4fdc77cbeaa46f8672d4b875c8b614b3935687950b2d88b10903652575"
  },
  "planner_statistics": {
    "player_attributes": {
      "last_analyze": null,
      "last_autoanalyze": null,
      "n_mod_since_analyze": 183978
    }
  },
  "shuffle": {
    "seed": "1",
    "row_limit": 300000,
    "tables": [
      "player_attributes"
    ],
    "tables_not_shuffled": [],
    "tables_skipped_for_size": {
      "laptimes": 400524,
      "legalities": 427907,
      "posthistory": 303155,
      "trans": 1056320,
      "yearmonth": 383282
    },
    "tables_not_reached_by_a_copy": {}
  },
  "shuffled_copies": {
    "run": true,
    "verdict": "not_equal",
    "differs": true,
    "result_hash": "sha256:0648da55b6d26bb2d6d63c9e16df785ebbe698f47a2b3d26068f9bae549cd6ca",
    "result": {
      "columns": [
        {
          "name": "id",
          "declared_type": "int8"
        }
      ],
      "row_count": 4,
      "truncated": false,
      "rows_shown": 4,
      "rows": [
        [
          {
            "type": "int",
            "value": 132235
          }
        ],
        [
          {
            "type": "int",
            "value": 132236
          }
        ],
        [
          {
            "type": "int",
            "value": 66213
          }
        ],
        [
          {
            "type": "int",
            "value": 66214
          }
        ]
      ],
      "result_hash": "sha256:0648da55b6d26bb2d6d63c9e16df785ebbe698f47a2b3d26068f9bae549cd6ca"
    }
  },
  "plan_variant": {
    "run": false,
    "reason": "the plan variant was not asked for"
  }
}

The evidence records

gold: evidence-gold.json

SELECT id FROM Player_Attributes WHERE preferred_foot = 'right' ORDER BY potential ASC NULLS LAST LIMIT 4
statement read from
data/questions/mini_dev_postgresql.json
digest
sha256:d2731292f20b8d8569cd956dd747ffe1df13cd625076263e38ae9ebcef50b1ab
origin
https://bird-bench.oss-cn-beijing.aliyuncs.com/minidev.zip (sha256 cc48ba16838204e4e214512030cb572eeb5f7bcdd999bae4b9b6ff12ec13b92f, downloaded 2026-09-07), member minidev/MINIDEV/mini_dev_postgresql.json, 2024-06-19

result_hash sha256:fa047e4fdc77cbeaa46f8672d4b875c8b614b3935687950b2d88b10903652575 recomputed from this JSON: match

record_hash sha256:ca7cb8df60f95559f136d5326ad09f87bdf840d6b31fd02b1a7f61cc58848ec9 recomputed from this JSON: match

the result this record holds, 4 rows

from evidence-gold.json, 4 rows

idint8
132236
132235
66213
66214
what ran, and where
run
audit-adbef1a5-9f41-4a8f-ac55-8c3d8df71394
executed at
2026-09-08T05:19:09.805403+00:00
data as of
2026-09-08T05:18:53.188261+00:00
backend at checkout
PostgreSQL 16.15 (Debian 16.15-1.pgdg13+2) on aarch64-unknown-linux-gnu, compiled by gcc (Debian 14.2.0-19) 14.2.0, 64-bit | server=172.17.0.2/32:5432 | database=bird
backend that answered
PostgreSQL 16.15 (Debian 16.15-1.pgdg13+2) on aarch64-unknown-linux-gnu, compiled by gcc (Debian 14.2.0-19) 14.2.0, 64-bit | server=172.17.0.2/32:5432 | database=bird
database role
auditor
replay rule
R-ORD
question set version
sha256:d2731292f20b8d8569cd956dd747ffe1df13cd625076263e38ae9ebcef50b1ab
validator
audit:libpg_query-parse
checks run
parses_as_exactly_one_statement, the_one_statement_is_a_select, no_placeholder_without_a_bound_parameter
statement timeout
30000 ms
rows
4 rows
the session it ran under
engine
postgresql
time_zone
Etc/UTC
date_style
ISO, MDY
interval_style
postgres
extra_float_digits
1
database_collation
en_US.utf8
work_mem
4096
hash_mem_multiplier
2

recorded beside them

statement_timeout
0
search_path
"$user", public
server_version
16.15 (Debian 16.15-1.pgdg13+2)
server_version_num
160015
transaction_read_only
on
max_parallel_workers_per_gather
2
server_encoding
UTF8
datlocprovider
c
daticulocale
datcollversion
2.41
the rendering and the data
version
attestql/audit/2
numeric_scale
6
timestamp_format
%Y-%m-%dT%H:%M:%S.%fZ
timezone
UTC
null_rendering
NULL
encoding
utf-8
schema digest
sha256:c3eef10c38807eeee593a743f369e57064f47c900ccb6a1d97f8f6bbf6e379af
source file sha256
sha256:31b1da211849d24a57c9af7636da46a5b82fc8a3ca1542bb3ebd8775e9a31cec
rows in public.player_attributes
183978

Running these again

gold

re-run this statement read-only against PostgreSQL 16.15 (Debian 16.15-1.pgdg13+2) on aarch64-unknown-linux-gnu, compiled by gcc (Debian 14.2.0-19) 14.2.0, 64-bit | server=172.17.0.2/32:5432 | database=bird under the session settings and over the data this record's fixture digest names, and compare the two results under R-ORD

This question's run

run
audit-adbef1a5-9f41-4a8f-ac55-8c3d8df71394
server
PostgreSQL 16.15 (Debian 16.15-1.pgdg13+2) on aarch64-unknown-linux-gnu, compiled by gcc (Debian 14.2.0-19) 14.2.0, 64-bit | server=172.17.0.2/32:5432 | database=bird
question set
mini_dev_postgresql from https://bird-bench.oss-cn-beijing.aliyuncs.com/minidev.zip (sha256 cc48ba16838204e4e214512030cb572eeb5f7bcdd999bae4b9b6ff12ec13b92f, downloaded 2026-09-07), member minidev/MINIDEV/mini_dev_postgresql.json
replay rule
R-ORD

the run this question belongs to

The JSON this page was rendered from