How to fix ER_WINDOW_NO_SUCH_WINDOW (3579): Window specification not found in MySQL

MySQLBEGINNERMEDIUMUpdated Dec 12, 2025· 103 views

MySQL throws ER_WINDOW_NO_SUCH_WINDOW when a window function refers to a named window (e.g. `OVER w`) that has no matching `WINDOW w AS (...)` definition in the same SELECT. The resolver cannot locate the shared specification, so the query fails before any rows are processed.

Quick fix

Fixes 3579

WINDOW w AS (PARTITION BY customer_id ORDER BY order_date DESC)
  1. Ensure every referenced window name is declared
  2. Fix typos or duplicate names when reusing windows
  3. Reduce the number of named windows or switch to inline specs
mysql — error
WINDOW w AS (PARTITION BY customer_id ORDER BY order_date DESC)
ER_WINDOW_NO_SUCH_WINDOW (3579): Window specification not found

What this error means

Each MySQL window function needs an OVER clause that describes its frame. You may repeat the specification inline or define a reusable named window with WINDOW <name> AS (<window-spec>) and reference it later as OVER <name>. In either case MySQL resolves the name at parse time. If you use a name that does not exist or if you mistype the name, MySQL raises ER_WINDOW_NO_SUCH_WINDOW because it cannot find the matching specification. The error happens before execution, so the query never produces a result. The simplest fix is to either add the missing definition immediately after the SELECT ... FROM clause or inline the same spec: ```sql -- fails because w is not defined SELECT id, SUM(value) OVER w AS running_total FROM metrics; -- works once the named window is defined SELECT id, SUM(value) OVER w AS running_total FROM metrics WINDOW w AS (PARTITION BY account_id ORDER BY created_at DESC); ```

Typical symptoms

  • Query fails with ER_WINDOW_NO_SUCH_WINDOW (3579) before any rows are returned
  • The error message mentions a window specification even though the referenced window name looks correct
  • Named WINDOW clauses are present but one of the names listed in OVER <name> is missing or misspelled
  • You copy/paste a query that reuses a window definition but forget to copy the WINDOW clause itself

Common causes

  1. The SELECT uses OVER w but the query never defines WINDOW w AS (...) afterwards
  2. A typo or case mismatch in the window name results in a lookup miss (MySQL normalizes unquoted identifiers to lower case)
  3. You defined the named window, but renamed or removed it during refactoring without updating every OVER clause that references it
  4. An inherited window references another window by name and the parent name is missing, so MySQL still reports the same 3579 error

How to fix "ER_WINDOW_NO_SUCH_WINDOW (3579): Window specification not found"

1Ensure every referenced window name is declared

Check the query for all OVER <name> usages and make sure the WINDOW clause defines that name. The WINDOW clause must appear after the FROM (and optional GROUP BY/HAVING) and before ORDER BY, for example:

sql
WINDOW w AS (PARTITION BY customer_id ORDER BY order_date DESC)

If adding the clause is not desirable, replace OVER <name> with the inline spec directly inside the OVER clause.

2Fix typos or duplicate names when reusing windows

MySQL treats identifier names in a case-insensitive way unless they are quoted, but typos still break the linkage.

sql
WINDOW max_date AS (ORDER BY created_at DESC)
SELECT sales_id,
       MAX(amount) OVER maxdate -- typo: should be max_date
FROM sales;

Spelling mistakes or renaming a window without touching every reference will produce the same error. Search for the name and normalize them to the defined identifier.

3Reduce the number of named windows or switch to inline specs

If you only reuse a given window once, defining a named window can be overkill and introduces another place to keep in sync. You can eliminate the issue entirely by writing the spec inline:

sql
SELECT
  AVG(value) OVER (PARTITION BY category ORDER BY created_at ROWS BETWEEN 3 PRECEDING AND CURRENT ROW)
FROM events;

Using inline OVER clauses avoids ER_WINDOW_NO_SUCH_WINDOW because there is no name resolution step.

Advanced notes

Named windows can refer to other named windows, but the graph must remain acyclic and every referenced name must still be defined. If you see ER_WINDOW_NO_SUCH_WINDOW inside a WINDOW clause, check that any inherited parent window exists as well.

Frequently asked questions

What does "3579" mean?
Each MySQL window function needs an OVER clause that describes its frame. You may repeat the specification inline or define a reusable named window with WINDOW <name> AS (<window-spec>) and reference it later as OVER <name>. In either case MySQL resolves the name at parse time.
How do I fix "3579"?
MySQL throws ER_WINDOW_NO_SUCH_WINDOW when a window function refers to a named window (e.g. OVER w) that has no matching WINDOW w AS (...) definition in the same SELECT. The resolver cannot locate the shared specification, so the query fails before any rows are processed.
What causes "3579"?
The SELECT uses OVER w but the query never defines WINDOW w AS (...) afterwards A typo or case mismatch in the window name results in a lookup miss (MySQL normalizes unquoted identifiers to lower case) You defined the named window, but renamed or removed it during refactoring without updating every OVER clause that references it
Is the "3579" error serious?
It is a medium-severity error — more of a blocker than a risk. The steps above resolve it.

Official resources & further reading