DB Olympics

Queries · q229 · Chief Financial Officer · week 2, night 4

2025 Revenue Reconciliation via Ledger Accounts, Including VAT, by Quarter

“Once VAT/sales-tax is included on the ledger side (not just net-of-tax revenue), does the ledger's gross billed amount tie to the payments table's net captured amount each quarter?”

Manager · asked the questionTobias LindqvistChief Financial Officer. New this month, previously finance director at a retailer. Preparing the 2025 annual accounts and the 2026 budget.
Analyst · planned the reportKofi MensahHypothesis-driven: states what he expects and designs reports that would prove him wrong.
Engineer · wrote the SQLInesThinks in window functions: ranks, running totals, LAG/LEAD for comparisons, percent-of-total.

Fictional people at a fictional company, each played by a language-model agent. Who they are and what they are told

  1. A business event lands on the Chief Financial Officer's desk

    Week 2

    The external auditors start the 2025 year-end audit in two weeks. They will want to see that the money adds up across the whole chain: what shoppers paid, what was refunded or credited, what merchants received in payouts, what Tidewick kept, and that invoices agree with all of it. They will also trace sample transactions end to end.

  2. Tobias Lindqvist writes to Kofi Mensah

    The manager, at the start of week 2

    Subject: Good progress — but the audit clock is now the priority

    Kofi,

    Thanks — this is useful, and I appreciate you flagging the caveats rather than smoothing them over. A few reactions and then where I want to focus next week.

    What stood out:

    • The correction on the revenue report (off by roughly half, now fixed and cross-checked) is reassuring that you caught it, but it also makes me want a second pair of eyes before anything like this goes near the auditors.
    • The refund numbers disagreeing by 16–40% depending on which source we use is the kind of thing an auditor will ask about directly. I don't want to walk in with two different refund totals and no explanation.
    • Concentration easing as we add merchants is good context for the budget conversation — no urgent follow-up needed there this week.
    • I also saw the notes from pricing and risk this week — the free-delivery giveaway and the refund pattern on that welcome discount are small in isolation, but they're exactly the kind of "where did the money go" questions auditors and I will both ask, so I'd like a rough sense of scale rather than letting them sit as separate anecdotes.

    The big new driver: external audit starts in two weeks. They'll want to walk the full money trail — what a shopper paid, what was refunded or credited back, what the merchant was paid out, what we kept as our fee, and that it all agrees with the invoices and accounts — and they'll pick sample transactions and trace them start to finish. I'd rather we got ahead of that than react to it.

    Questions for this week, in priority order:

    1. Can we demonstrate, for a sample of transactions, that the money actually adds up end to end — shopper payment through refund/credit, payout to the merchant, and our retained fee — so we have something ready to hand the auditors rather than assembling it under time pressure?
    2. Which refund figure should I trust for the 2025 accounts, and why do the two methods disagree? I don't need the full reconciliation solved, but I need to understand the likely cause well enough to explain it credibly if asked.
    3. Where do things stand on getting our own plan-fee revenue into the picture, even approximately, so I'm not presenting half of 2025 revenue as the whole story?
    4. If there's room: roughly how much revenue or margin might be leaking through the control gaps your peers flagged this week (free deliveries to canceled customers, uncapped coupon reuse) — just enough for me to judge whether it's noise or something that belongs in front of the auditors too.

    Audit readiness (#1) is the one I most need — please make that the lead request even if it means FX and B2B receivables slip another week.

    Thanks, Tobias

  3. Kofi Mensah plans the night

    The analyst · week 2, night 4, request 1 of 3

    Report 1 from last night looked alarming at first — ledger net revenue running 13.7-15.9% below payments net amount every quarter — but I think I made the same class of mistake as Night 2: "Sales revenue"/"Shipping income" ledger accounts are booked net of VAT (the VAT portion is credited separately to "VAT / sales tax payable"), while my "payments_net_amount_eur" was the VAT-inclusive gross-minus-refund figure. Spot-checking the Night 2 ledger detail confirms it: Ampfeld Elektronik #1727's VAT credit (2,653.61) is 15.97% of its gross payment (16,619.99) — right in the middle of the quarterly gaps I'm seeing. So this is very likely just tax-inclusive vs tax-exclusive revenue, not money going missing, but I want to prove it precisely before I tell Tobias it's resolved, since "the ledger is €200k short this quarter" is exactly the kind of number an auditor would seize on if I handed it over unexplained.

    Report 1's payment-method breakdown is the one genuine, bounded item left: bank_transfer payments are only 19 of the 249 "other mismatch" payments by count, but carry 40% of the mismatch euros with an average gap of €898 (vs ~€18-33 for card/wallet/credit) — real money, concentrated in a small, nameable list. Report 3 is a clean, reassuring finding: the no-ledger-entries gap was worst in January (2.17%, €1,241) and has fallen to near-zero by October, with only a small December blip plausibly tied to holiday volume — looks like a fixed/fading issue, not an active control failure.

    Tonight (last night before the memo): (1) redo the revenue reconciliation correctly by including VAT in the ledger-side total, to get the real tie-out number; (2) pull the actual 19 bank-transfer mismatched payments as a named, handoff-ready list; (3) check whether bank_transfer payments are systemically more mismatch-prone as a channel (vs. a handful of one-off accidents) by looking at all 2025 bank_transfer payments, not just the flagged ones.

    2025 Revenue Reconciliation via Ledger Accounts, Including VAT, by Quarter
    Question
    Once VAT/sales-tax is included on the ledger side (not just net-of-tax revenue), does the ledger's gross billed amount tie to the payments table's net captured amount each quarter?
    One row per
    one calendar quarter, 2025
    Columns
    • quarter
    • ledger_gross_billed_eur (sum of credit amounts where ledger_accounts.account_type='revenue' OR ledger_accounts.name='VAT / sales tax payable', minus sum of debit amounts where ledger_accounts.account_type='contra_revenue' OR ledger_accounts.name='VAT / sales tax payable', all for ledger_entries.occurred_at in the quarter)
    • payments_net_amount_eur (sum of payments.amount - payments.amount_refunded, captured_at in the quarter, status captured/refunded/partially_refunded)
    • diff_eur
    • diff_pct
  4. Ines writes the SQL

    The engineer · 2 dry runs on the empty schema, then the submission

    Dry run 1 · STATUS: REJECTED
    WITH quarters AS (
      SELECT generate_series(1,4) AS q
    ),
    ledger_filtered AS (
      SELECT
        je.id,
        je.direction,
        je.amount,
        je.currency_code,
        je.occurred_at,
        la.account_type,
        la.name AS account_name
      FROM ledger_entries je
      JOIN ledger_accounts la ON la.id = je.ledger_account_id
      WHERE je.occurred_at >= DATE '2025-01-01'
        AND je.occurred_at < DATE '2026-01-01'
        AND (
          la.account_type IN ('revenue','contra_revenue')
          OR la.name = 'VAT / sales tax payable'
        )
    ),
    ledger_eur AS (
      SELECT
        lf.id,
        lf.direction,
        lf.amount,
        lf.currency_code,
        lf.account_type,
        lf.account_name,
        EXTRACT(QUARTER FROM lf.occurred_at)::int AS q,
        CASE WHEN lf.currency_code = 'EUR' THEN lf.amount
             ELSE lf.amount / er.rate END AS amount_eur
      FROM ledger_filtered lf
      LEFT JOIN exchange_rates er
        ON er.base_code = 'EUR'
       AND er.quote_code = lf.currency_code
       AND er.as_of = lf.occurred_at::date
    ),
    ledger_quarterly AS (
      SELECT
        q,
        SUM(CASE
              WHEN direction = 'credit' AND (account_type = 'revenue' OR account_name = 'VAT / sales tax payable') THEN amount_eur
              WHEN direction = 'debit' AND (account_type = 'contra_revenue' OR account_name = 'VAT / sales tax payable') THEN -amount_eur
              ELSE 0
            END) AS ledger_gross_billed_eur
      FROM ledger_eur
      GROUP BY q
    ),
    payments_filtered AS (
      SELECT
        p.id,
        p.amount,
        p.amount_refunded,
        p.currency_code,
        p.captured_at,
        EXTRACT(QUARTER FROM p.captured_at)::int AS q
      FROM payments p
      WHERE p.captured_at >= DATE '2025-01-01'
        AND p.captured_at < DATE '2026-01-01'
        AND p.status IN ('captured','refunded','partially_refunded')
    ),
    payments_eur AS (
      SELECT
        pf.q,
        CASE WHEN pf.currency_code = 'EUR' THEN (pf.amount - pf.amount_refunded)
             ELSE (pf.amount - pf.amount_refunded) / er.rate END AS net_amount_eur
      FROM payments_filtered pf
      LEFT JOIN exchange_rates er
        ON er.base_code = 'EUR'
       AND er.quote_code = pf.currency_code
       AND er.as_of = pf.captured_at::date
    ),
    payments_quarterly AS (
      SELECT q, SUM(net_amount_eur) AS payments_net_amount_eur
      FROM payments_eur
      GROUP BY q
    )
    SELECT
      '2025-Q' || quarters.q AS quarter,
      ROUND(COALESCE(lq.ledger_gross_billed_eur,0), 2) AS ledger_gross_billed_eur,
      ROUND(COALESCE(pq.payments_net_amount_eur,0), 2) AS payments_net_amount_eur,
      ROUND(COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0), 2) AS diff_eur,
      ROUND(
        CASE WHEN COALESCE(pq.payments_net_amount_eur,0) = 0 THEN NULL
             ELSE (COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0)) / pq.payments_net_amount_eur * 100
        END, 2
      ) AS diff_pct
    FROM quarters
    LEFT JOIN ledger_quarterly lq ON lq.q = quarters.q
    LEFT JOIN payments_quarterly pq ON pq.q = quarters.q
    ORDER BY quarters.q
    Dry run 2 · 1 change from the dry run before · STATUS: COMPILES (dry run on the empty schema, no data read)
    WITH quarters AS (  SELECT generate_series(1,4) AS q  SELECT * FROM (VALUES (1),(2),(3),(4)) AS v(q)),ledger_filtered AS (  SELECT    je.id,    je.direction,    je.amount,    je.currency_code,    je.occurred_at,    la.account_type,    la.name AS account_name  FROM ledger_entries je  JOIN ledger_accounts la ON la.id = je.ledger_account_id  WHERE je.occurred_at >= DATE '2025-01-01'    AND je.occurred_at < DATE '2026-01-01'    AND (      la.account_type IN ('revenue','contra_revenue')      OR la.name = 'VAT / sales tax payable'    )),ledger_eur AS (  SELECT    lf.id,    lf.direction,    lf.amount,    lf.currency_code,    lf.account_type,    lf.account_name,    EXTRACT(QUARTER FROM lf.occurred_at)::int AS q,    CASE WHEN lf.currency_code = 'EUR' THEN lf.amount         ELSE lf.amount / er.rate END AS amount_eur  FROM ledger_filtered lf  LEFT JOIN exchange_rates er    ON er.base_code = 'EUR'   AND er.quote_code = lf.currency_code   AND er.as_of = lf.occurred_at::date),ledger_quarterly AS (  SELECT    q,    SUM(CASE          WHEN direction = 'credit' AND (account_type = 'revenue' OR account_name = 'VAT / sales tax payable') THEN amount_eur          WHEN direction = 'debit' AND (account_type = 'contra_revenue' OR account_name = 'VAT / sales tax payable') THEN -amount_eur          ELSE 0        END) AS ledger_gross_billed_eur  FROM ledger_eur  GROUP BY q),payments_filtered AS (  SELECT    p.id,    p.amount,    p.amount_refunded,    p.currency_code,    p.captured_at,    EXTRACT(QUARTER FROM p.captured_at)::int AS q  FROM payments p  WHERE p.captured_at >= DATE '2025-01-01'    AND p.captured_at < DATE '2026-01-01'    AND p.status IN ('captured','refunded','partially_refunded')),payments_eur AS (  SELECT    pf.q,    CASE WHEN pf.currency_code = 'EUR' THEN (pf.amount - pf.amount_refunded)         ELSE (pf.amount - pf.amount_refunded) / er.rate END AS net_amount_eur  FROM payments_filtered pf  LEFT JOIN exchange_rates er    ON er.base_code = 'EUR'   AND er.quote_code = pf.currency_code   AND er.as_of = pf.captured_at::date),payments_quarterly AS (  SELECT q, SUM(net_amount_eur) AS payments_net_amount_eur  FROM payments_eur  GROUP BY q)SELECT  '2025-Q' || quarters.q AS quarter,  ROUND(COALESCE(lq.ledger_gross_billed_eur,0), 2) AS ledger_gross_billed_eur,  ROUND(COALESCE(pq.payments_net_amount_eur,0), 2) AS payments_net_amount_eur,  ROUND(COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0), 2) AS diff_eur,  ROUND(    CASE WHEN COALESCE(pq.payments_net_amount_eur,0) = 0 THEN NULL         ELSE (COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0)) / pq.payments_net_amount_eur * 100    END, 2  ) AS diff_pctFROM quartersLEFT JOIN ledger_quarterly lq ON lq.q = quarters.qLEFT JOIN payments_quarterly pq ON pq.q = quarters.qORDER BY quarters.q

    “Query compiles and returns the expected columns. Submitting.”

    Submitted · the SQL of the last dry run, unchanged · Submitted to tonight's batch. Your work on this request is done.

    “Submitted. The report computes, per 2025 quarter: - ledger_gross_billed_eur: credits to revenue or VAT/sales-tax-payable accounts minus debits to contra_revenue or VAT/sales-tax-payable accounts, each row converted to EUR using the exchange rate as of that ledger entry's own occurred_at date. - payments_net_amount_eur: amount - amount_refunded for payments with status captured/refunded/partially_refunded, converted to EUR using the rate as of captured_at. - diff_eur and diff_pct (ledger minus payments, as a percent of payments; null if payments total is zero for a quarter). Rows are ordered 2025-Q1 → 2025-Q4 via an explicit quarter spine so all four quarters print even if one side has no activity.”

  5. The report comes back overnight

    As Kofi Mensah saw it, from the small dataset the agents worked on

    quarter | ledger_gross_billed_eur | payments_net_amount_eur |  diff_eur | diff_pct
    --------+-------------------------+-------------------------+-----------+---------
    2025-Q1 |              1224288.48 |              1249571.12 | -25282.64 |    -2.02
    2025-Q2 |              1281589.56 |              1279430.77 |   2158.79 |     0.17
    2025-Q3 |              1070758.66 |              1065326.23 |   5432.43 |     0.51
    2025-Q4 |              1795895.17 |              1824173.25 | -28278.07 |    -1.55
    (4 rows)
  6. What came of it

    The memo and the queries that followed; links found by title, so inferred

    It builds on:

  7. It becomes benchmark query q229

    Changed only where the benchmark needs the same result on every system

    • spellingcast (4×)
    • numericsdocs/NUMERICS.md: rounding removed; results keep full precision
    • numericsdocs/NUMERICS.md: x / exchange rate cast to NUMERIC(18,6) (2×)
    • made explicita selected t.col gets AS col, its standard name made explicit (18×)
    • determinismthe standard leaves the place of NULLs in a sort to the implementation: NULLS LAST ascending, NULLS FIRST descending, as in the reference results
    The benchmark text, against the submitted SQL
    WITH quarters AS (  SELECT * FROM (VALUES (1),(2),(3),(4)) AS v(q)),ledger_filtered AS (  SELECT    je.id,    je.direction,    je.amount,    je.currency_code,    je.occurred_at,    la.account_type,    je.id AS id,    je.direction AS direction,    je.amount AS amount,    je.currency_code AS currency_code,    je.occurred_at AS occurred_at,    la.account_type AS account_type,    la.name AS account_name  FROM ledger_entries je  JOIN ledger_accounts la ON la.id = je.ledger_account_id  WHERE je.occurred_at >= DATE '2025-01-01'    AND je.occurred_at < DATE '2026-01-01'    AND (      la.account_type IN ('revenue','contra_revenue')      OR la.name = 'VAT / sales tax payable'    )),ledger_eur AS (  SELECT    lf.id,    lf.direction,    lf.amount,    lf.currency_code,    lf.account_type,    lf.account_name,    EXTRACT(QUARTER FROM lf.occurred_at)::int AS q,    lf.id AS id,    lf.direction AS direction,    lf.amount AS amount,    lf.currency_code AS currency_code,    lf.account_type AS account_type,    lf.account_name AS account_name,    CAST(EXTRACT(QUARTER FROM lf.occurred_at) AS int) AS q,    CASE WHEN lf.currency_code = 'EUR' THEN lf.amount         ELSE lf.amount / er.rate END AS amount_eur         ELSE CAST(lf.amount / er.rate AS NUMERIC(18,6)) END AS amount_eur  FROM ledger_filtered lf  LEFT JOIN exchange_rates er    ON er.base_code = 'EUR'   AND er.quote_code = lf.currency_code   AND er.as_of = lf.occurred_at::date   AND er.as_of = CAST(lf.occurred_at AS date)),ledger_quarterly AS (  SELECT    q,    SUM(CASE          WHEN direction = 'credit' AND (account_type = 'revenue' OR account_name = 'VAT / sales tax payable') THEN amount_eur          WHEN direction = 'debit' AND (account_type = 'contra_revenue' OR account_name = 'VAT / sales tax payable') THEN -amount_eur          ELSE 0        END) AS ledger_gross_billed_eur  FROM ledger_eur  GROUP BY q),payments_filtered AS (  SELECT    p.id,    p.amount,    p.amount_refunded,    p.currency_code,    p.captured_at,    EXTRACT(QUARTER FROM p.captured_at)::int AS q    p.id AS id,    p.amount AS amount,    p.amount_refunded AS amount_refunded,    p.currency_code AS currency_code,    p.captured_at AS captured_at,    CAST(EXTRACT(QUARTER FROM p.captured_at) AS int) AS q  FROM payments p  WHERE p.captured_at >= DATE '2025-01-01'    AND p.captured_at < DATE '2026-01-01'    AND p.status IN ('captured','refunded','partially_refunded')),payments_eur AS (  SELECT    pf.q,    pf.q AS q,    CASE WHEN pf.currency_code = 'EUR' THEN (pf.amount - pf.amount_refunded)         ELSE (pf.amount - pf.amount_refunded) / er.rate END AS net_amount_eur         ELSE CAST((pf.amount - pf.amount_refunded) / er.rate AS NUMERIC(18,6)) END AS net_amount_eur  FROM payments_filtered pf  LEFT JOIN exchange_rates er    ON er.base_code = 'EUR'   AND er.quote_code = pf.currency_code   AND er.as_of = pf.captured_at::date   AND er.as_of = CAST(pf.captured_at AS date)),payments_quarterly AS (  SELECT q, SUM(net_amount_eur) AS payments_net_amount_eur  FROM payments_eur  GROUP BY q)SELECT  '2025-Q' || quarters.q AS quarter,  ROUND(COALESCE(lq.ledger_gross_billed_eur,0), 2) AS ledger_gross_billed_eur,  ROUND(COALESCE(pq.payments_net_amount_eur,0), 2) AS payments_net_amount_eur,  ROUND(COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0), 2) AS diff_eur,  ROUND(    CASE WHEN COALESCE(pq.payments_net_amount_eur,0) = 0 THEN NULL         ELSE (COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0)) / pq.payments_net_amount_eur * 100    END, 2  ) AS diff_pct  COALESCE(lq.ledger_gross_billed_eur,0) AS ledger_gross_billed_eur,  COALESCE(pq.payments_net_amount_eur,0) AS payments_net_amount_eur,  COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0) AS diff_eur,  CASE WHEN COALESCE(pq.payments_net_amount_eur,0) = 0 THEN NULL       ELSE (COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0)) / pq.payments_net_amount_eur * 100  END AS diff_pctFROM quartersLEFT JOIN ledger_quarterly lq ON lq.q = quarters.qLEFT JOIN payments_quarterly pq ON pq.q = quarters.qORDER BY quarters.qORDER BY quarters.q NULLS LAST
    WITH quarters AS (
      SELECT * FROM (VALUES (1),(2),(3),(4)) AS v(q)
    ),
    ledger_filtered AS (
      SELECT
        je.id AS id,
        je.direction AS direction,
        je.amount AS amount,
        je.currency_code AS currency_code,
        je.occurred_at AS occurred_at,
        la.account_type AS account_type,
        la.name AS account_name
      FROM ledger_entries je
      JOIN ledger_accounts la ON la.id = je.ledger_account_id
      WHERE je.occurred_at >= DATE '2025-01-01'
        AND je.occurred_at < DATE '2026-01-01'
        AND (
          la.account_type IN ('revenue','contra_revenue')
          OR la.name = 'VAT / sales tax payable'
        )
    ),
    ledger_eur AS (
      SELECT
        lf.id AS id,
        lf.direction AS direction,
        lf.amount AS amount,
        lf.currency_code AS currency_code,
        lf.account_type AS account_type,
        lf.account_name AS account_name,
        CAST(EXTRACT(QUARTER FROM lf.occurred_at) AS int) AS q,
        CASE WHEN lf.currency_code = 'EUR' THEN lf.amount
             ELSE CAST(lf.amount / er.rate AS NUMERIC(18,6)) END AS amount_eur
      FROM ledger_filtered lf
      LEFT JOIN exchange_rates er
        ON er.base_code = 'EUR'
       AND er.quote_code = lf.currency_code
       AND er.as_of = CAST(lf.occurred_at AS date)
    ),
    ledger_quarterly AS (
      SELECT
        q,
        SUM(CASE
              WHEN direction = 'credit' AND (account_type = 'revenue' OR account_name = 'VAT / sales tax payable') THEN amount_eur
              WHEN direction = 'debit' AND (account_type = 'contra_revenue' OR account_name = 'VAT / sales tax payable') THEN -amount_eur
              ELSE 0
            END) AS ledger_gross_billed_eur
      FROM ledger_eur
      GROUP BY q
    ),
    payments_filtered AS (
      SELECT
        p.id AS id,
        p.amount AS amount,
        p.amount_refunded AS amount_refunded,
        p.currency_code AS currency_code,
        p.captured_at AS captured_at,
        CAST(EXTRACT(QUARTER FROM p.captured_at) AS int) AS q
      FROM payments p
      WHERE p.captured_at >= DATE '2025-01-01'
        AND p.captured_at < DATE '2026-01-01'
        AND p.status IN ('captured','refunded','partially_refunded')
    ),
    payments_eur AS (
      SELECT
        pf.q AS q,
        CASE WHEN pf.currency_code = 'EUR' THEN (pf.amount - pf.amount_refunded)
             ELSE CAST((pf.amount - pf.amount_refunded) / er.rate AS NUMERIC(18,6)) END AS net_amount_eur
      FROM payments_filtered pf
      LEFT JOIN exchange_rates er
        ON er.base_code = 'EUR'
       AND er.quote_code = pf.currency_code
       AND er.as_of = CAST(pf.captured_at AS date)
    ),
    payments_quarterly AS (
      SELECT q, SUM(net_amount_eur) AS payments_net_amount_eur
      FROM payments_eur
      GROUP BY q
    )
    SELECT
      '2025-Q' || quarters.q AS quarter,
      COALESCE(lq.ledger_gross_billed_eur,0) AS ledger_gross_billed_eur,
      COALESCE(pq.payments_net_amount_eur,0) AS payments_net_amount_eur,
      COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0) AS diff_eur,
      CASE WHEN COALESCE(pq.payments_net_amount_eur,0) = 0 THEN NULL
           ELSE (COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0)) / pq.payments_net_amount_eur * 100
      END AS diff_pct
    FROM quarters
    LEFT JOIN ledger_quarterly lq ON lq.q = quarters.q
    LEFT JOIN payments_quarterly pq ON pq.q = quarters.q
    ORDER BY quarters.q NULLS LAST
    100 ms1 sHyper187 msDuckDB105 msGizmoSQL106 msclickhouse_brew496 msFirebolterrorDataFusion299 msClickHouseerror
    • Firebolt{ "errors": [ { "description": "Line 32, Column 30: Operations between decimals with different precision and scale is not supported at the moment. Explicitly cast one of the decimals to other decimal precision and scale." } ], "query": { "query_id": "e347310f-3ec4-44a5-90e3-81ed0d437366", "query_lab
    • ClickHouseCode: 69. DB::Exception: Decimal result's scale is less than argument's one: while executing function divide on arguments __table6.amount Decimal(14, 4) Decimal64(size = 0), __table9.rate Nullable(Decimal(12, 6)) Nullable(size = 0, Decimal64(size = 0), UInt8(size = 0)). (ARGUMENT_OUT_OF_BOUND)
  8. Everything, as recorded

    The agents' own records, as the role play wrote them; only the personal data of the person who ran it is redacted

    Ines's whole session, 9 turns
    • The request, as Ines received it
      Report request from Kofi Mensah (analyst for the Chief Financial Officer):
      
      Title: 2025 Revenue Reconciliation via Ledger Accounts, Including VAT, by Quarter
      Question: Once VAT/sales-tax is included on the ledger side (not just net-of-tax revenue), does the ledger's gross billed amount tie to the payments table's net captured amount each quarter?
      Grain: one calendar quarter, 2025
      Columns:
      - quarter
      - ledger_gross_billed_eur (sum of credit amounts where ledger_accounts.account_type='revenue' OR ledger_accounts.name='VAT / sales tax payable', minus sum of debit amounts where ledger_accounts.account_type='contra_revenue' OR ledger_accounts.name='VAT / sales tax payable', all for ledger_entries.occurred_at in the quarter)
      - payments_net_amount_eur (sum of payments.amount - payments.amount_refunded, captured_at in the quarter, status captured/refunded/partially_refunded)
      - diff_eur
      - diff_pct
      Details: Same method as last night's revenue reconciliation report (EUR conversion per-row via exchange_rates on the ledger entry's own occurred_at/currency_code for the ledger side, and on captured_at/currency_code for the payments side), but this time include the 'VAT / sales tax payable' ledger account's credits (at capture) and debits (at refund reversal) in the ledger-side total alongside 'revenue'-type accounts and 'contra_revenue'-type debits, so the ledger total represents the full gross-billed-minus-refunded amount rather than tax-exclusive revenue. Group by calendar quarter of occurred_at (ledger side) / captured_at (payments side). Order chronologically 2025-Q1 to 2025-Q4 (4 rows).
      
      Check your query with the warehouse's dry_run tool, then hand it in with submit.
    • Ines calls dry_run
      WITH quarters AS (
        SELECT generate_series(1,4) AS q
      ),
      ledger_filtered AS (
        SELECT
          je.id,
          je.direction,
          je.amount,
          je.currency_code,
          je.occurred_at,
          la.account_type,
          la.name AS account_name
        FROM ledger_entries je
        JOIN ledger_accounts la ON la.id = je.ledger_account_id
        WHERE je.occurred_at >= DATE '2025-01-01'
          AND je.occurred_at < DATE '2026-01-01'
          AND (
            la.account_type IN ('revenue','contra_revenue')
            OR la.name = 'VAT / sales tax payable'
          )
      ),
      ledger_eur AS (
        SELECT
          lf.id,
          lf.direction,
          lf.amount,
          lf.currency_code,
          lf.account_type,
          lf.account_name,
          EXTRACT(QUARTER FROM lf.occurred_at)::int AS q,
          CASE WHEN lf.currency_code = 'EUR' THEN lf.amount
               ELSE lf.amount / er.rate END AS amount_eur
        FROM ledger_filtered lf
        LEFT JOIN exchange_rates er
          ON er.base_code = 'EUR'
         AND er.quote_code = lf.currency_code
         AND er.as_of = lf.occurred_at::date
      ),
      ledger_quarterly AS (
        SELECT
          q,
          SUM(CASE
                WHEN direction = 'credit' AND (account_type = 'revenue' OR account_name = 'VAT / sales tax payable') THEN amount_eur
                WHEN direction = 'debit' AND (account_type = 'contra_revenue' OR account_name = 'VAT / sales tax payable') THEN -amount_eur
                ELSE 0
              END) AS ledger_gross_billed_eur
        FROM ledger_eur
        GROUP BY q
      ),
      payments_filtered AS (
        SELECT
          p.id,
          p.amount,
          p.amount_refunded,
          p.currency_code,
          p.captured_at,
          EXTRACT(QUARTER FROM p.captured_at)::int AS q
        FROM payments p
        WHERE p.captured_at >= DATE '2025-01-01'
          AND p.captured_at < DATE '2026-01-01'
          AND p.status IN ('captured','refunded','partially_refunded')
      ),
      payments_eur AS (
        SELECT
          pf.q,
          CASE WHEN pf.currency_code = 'EUR' THEN (pf.amount - pf.amount_refunded)
               ELSE (pf.amount - pf.amount_refunded) / er.rate END AS net_amount_eur
        FROM payments_filtered pf
        LEFT JOIN exchange_rates er
          ON er.base_code = 'EUR'
         AND er.quote_code = pf.currency_code
         AND er.as_of = pf.captured_at::date
      ),
      payments_quarterly AS (
        SELECT q, SUM(net_amount_eur) AS payments_net_amount_eur
        FROM payments_eur
        GROUP BY q
      )
      SELECT
        '2025-Q' || quarters.q AS quarter,
        ROUND(COALESCE(lq.ledger_gross_billed_eur,0), 2) AS ledger_gross_billed_eur,
        ROUND(COALESCE(pq.payments_net_amount_eur,0), 2) AS payments_net_amount_eur,
        ROUND(COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0), 2) AS diff_eur,
        ROUND(
          CASE WHEN COALESCE(pq.payments_net_amount_eur,0) = 0 THEN NULL
               ELSE (COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0)) / pq.payments_net_amount_eur * 100
          END, 2
        ) AS diff_pct
      FROM quarters
      LEFT JOIN ledger_quarterly lq ON lq.q = quarters.q
      LEFT JOIN payments_quarterly pq ON pq.q = quarters.q
      ORDER BY quarters.q
    • The warehouse answers
      STATUS: REJECTED
        - does not compile: Catalog Error: Function with name generate_series does not exist!
    • Ines calls dry_run
      WITH quarters AS (
        SELECT * FROM (VALUES (1),(2),(3),(4)) AS v(q)
      ),
      ledger_filtered AS (
        SELECT
          je.id,
          je.direction,
          je.amount,
          je.currency_code,
          je.occurred_at,
          la.account_type,
          la.name AS account_name
        FROM ledger_entries je
        JOIN ledger_accounts la ON la.id = je.ledger_account_id
        WHERE je.occurred_at >= DATE '2025-01-01'
          AND je.occurred_at < DATE '2026-01-01'
          AND (
            la.account_type IN ('revenue','contra_revenue')
            OR la.name = 'VAT / sales tax payable'
          )
      ),
      ledger_eur AS (
        SELECT
          lf.id,
          lf.direction,
          lf.amount,
          lf.currency_code,
          lf.account_type,
          lf.account_name,
          EXTRACT(QUARTER FROM lf.occurred_at)::int AS q,
          CASE WHEN lf.currency_code = 'EUR' THEN lf.amount
               ELSE lf.amount / er.rate END AS amount_eur
        FROM ledger_filtered lf
        LEFT JOIN exchange_rates er
          ON er.base_code = 'EUR'
         AND er.quote_code = lf.currency_code
         AND er.as_of = lf.occurred_at::date
      ),
      ledger_quarterly AS (
        SELECT
          q,
          SUM(CASE
                WHEN direction = 'credit' AND (account_type = 'revenue' OR account_name = 'VAT / sales tax payable') THEN amount_eur
                WHEN direction = 'debit' AND (account_type = 'contra_revenue' OR account_name = 'VAT / sales tax payable') THEN -amount_eur
                ELSE 0
              END) AS ledger_gross_billed_eur
        FROM ledger_eur
        GROUP BY q
      ),
      payments_filtered AS (
        SELECT
          p.id,
          p.amount,
          p.amount_refunded,
          p.currency_code,
          p.captured_at,
          EXTRACT(QUARTER FROM p.captured_at)::int AS q
        FROM payments p
        WHERE p.captured_at >= DATE '2025-01-01'
          AND p.captured_at < DATE '2026-01-01'
          AND p.status IN ('captured','refunded','partially_refunded')
      ),
      payments_eur AS (
        SELECT
          pf.q,
          CASE WHEN pf.currency_code = 'EUR' THEN (pf.amount - pf.amount_refunded)
               ELSE (pf.amount - pf.amount_refunded) / er.rate END AS net_amount_eur
        FROM payments_filtered pf
        LEFT JOIN exchange_rates er
          ON er.base_code = 'EUR'
         AND er.quote_code = pf.currency_code
         AND er.as_of = pf.captured_at::date
      ),
      payments_quarterly AS (
        SELECT q, SUM(net_amount_eur) AS payments_net_amount_eur
        FROM payments_eur
        GROUP BY q
      )
      SELECT
        '2025-Q' || quarters.q AS quarter,
        ROUND(COALESCE(lq.ledger_gross_billed_eur,0), 2) AS ledger_gross_billed_eur,
        ROUND(COALESCE(pq.payments_net_amount_eur,0), 2) AS payments_net_amount_eur,
        ROUND(COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0), 2) AS diff_eur,
        ROUND(
          CASE WHEN COALESCE(pq.payments_net_amount_eur,0) = 0 THEN NULL
               ELSE (COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0)) / pq.payments_net_amount_eur * 100
          END, 2
        ) AS diff_pct
      FROM quarters
      LEFT JOIN ledger_quarterly lq ON lq.q = quarters.q
      LEFT JOIN payments_quarterly pq ON pq.q = quarters.q
      ORDER BY quarters.q
    • The warehouse answers
      STATUS: COMPILES (dry run on the empty schema, no data read)
      COLUMNS: quarter, ledger_gross_billed_eur, payments_net_amount_eur, diff_eur, diff_pct
    • InesQuery compiles and returns the expected columns. Submitting.
    • Ines calls submit
      WITH quarters AS (
        SELECT * FROM (VALUES (1),(2),(3),(4)) AS v(q)
      ),
      ledger_filtered AS (
        SELECT
          je.id,
          je.direction,
          je.amount,
          je.currency_code,
          je.occurred_at,
          la.account_type,
          la.name AS account_name
        FROM ledger_entries je
        JOIN ledger_accounts la ON la.id = je.ledger_account_id
        WHERE je.occurred_at >= DATE '2025-01-01'
          AND je.occurred_at < DATE '2026-01-01'
          AND (
            la.account_type IN ('revenue','contra_revenue')
            OR la.name = 'VAT / sales tax payable'
          )
      ),
      ledger_eur AS (
        SELECT
          lf.id,
          lf.direction,
          lf.amount,
          lf.currency_code,
          lf.account_type,
          lf.account_name,
          EXTRACT(QUARTER FROM lf.occurred_at)::int AS q,
          CASE WHEN lf.currency_code = 'EUR' THEN lf.amount
               ELSE lf.amount / er.rate END AS amount_eur
        FROM ledger_filtered lf
        LEFT JOIN exchange_rates er
          ON er.base_code = 'EUR'
         AND er.quote_code = lf.currency_code
         AND er.as_of = lf.occurred_at::date
      ),
      ledger_quarterly AS (
        SELECT
          q,
          SUM(CASE
                WHEN direction = 'credit' AND (account_type = 'revenue' OR account_name = 'VAT / sales tax payable') THEN amount_eur
                WHEN direction = 'debit' AND (account_type = 'contra_revenue' OR account_name = 'VAT / sales tax payable') THEN -amount_eur
                ELSE 0
              END) AS ledger_gross_billed_eur
        FROM ledger_eur
        GROUP BY q
      ),
      payments_filtered AS (
        SELECT
          p.id,
          p.amount,
          p.amount_refunded,
          p.currency_code,
          p.captured_at,
          EXTRACT(QUARTER FROM p.captured_at)::int AS q
        FROM payments p
        WHERE p.captured_at >= DATE '2025-01-01'
          AND p.captured_at < DATE '2026-01-01'
          AND p.status IN ('captured','refunded','partially_refunded')
      ),
      payments_eur AS (
        SELECT
          pf.q,
          CASE WHEN pf.currency_code = 'EUR' THEN (pf.amount - pf.amount_refunded)
               ELSE (pf.amount - pf.amount_refunded) / er.rate END AS net_amount_eur
        FROM payments_filtered pf
        LEFT JOIN exchange_rates er
          ON er.base_code = 'EUR'
         AND er.quote_code = pf.currency_code
         AND er.as_of = pf.captured_at::date
      ),
      payments_quarterly AS (
        SELECT q, SUM(net_amount_eur) AS payments_net_amount_eur
        FROM payments_eur
        GROUP BY q
      )
      SELECT
        '2025-Q' || quarters.q AS quarter,
        ROUND(COALESCE(lq.ledger_gross_billed_eur,0), 2) AS ledger_gross_billed_eur,
        ROUND(COALESCE(pq.payments_net_amount_eur,0), 2) AS payments_net_amount_eur,
        ROUND(COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0), 2) AS diff_eur,
        ROUND(
          CASE WHEN COALESCE(pq.payments_net_amount_eur,0) = 0 THEN NULL
               ELSE (COALESCE(lq.ledger_gross_billed_eur,0) - COALESCE(pq.payments_net_amount_eur,0)) / pq.payments_net_amount_eur * 100
          END, 2
        ) AS diff_pct
      FROM quarters
      LEFT JOIN ledger_quarterly lq ON lq.q = quarters.q
      LEFT JOIN payments_quarterly pq ON pq.q = quarters.q
      ORDER BY quarters.q
    • The warehouse answers
      Submitted to tonight's batch. Your work on this request is done.
    • InesSubmitted. The report computes, per 2025 quarter: - **ledger_gross_billed_eur**: credits to revenue or VAT/sales-tax-payable accounts minus debits to contra_revenue or VAT/sales-tax-payable accounts, each row converted to EUR using the exchange rate as of that ledger entry's own `occurred_at` date. - **payments_net_amount_eur**: `amount - amount_refunded` for payments with status captured/refunded/partially_refunded, converted to EUR using the rate as of `captured_at`. - **diff_eur** and **diff_pct** (ledger minus payments, as a percent of payments; null if payments total is zero for a quarter). Rows are ordered 2025-Q1 → 2025-Q4 via an explicit quarter spine so all four quarters print even if one side has no activity.