3264
MySQLERRORNotableWindow FunctionsHIGH confidence
PARTITION BY cannot be used in a window reference
Production Risk
Low — query is rejected; restructure the WINDOW definition.
How to reproduce
trigger — this will error
trigger — this will error
SELECT ROW_NUMBER() OVER (w PARTITION BY dept) FROM t1 WINDOW w AS (ORDER BY salary);
expected output
ERROR 3264 (HY000): Cannot override PARTITION BY of window 'w'.
Fix
Move PARTITION BY to window definition
Move PARTITION BY to window definition
SELECT ROW_NUMBER() OVER (w) FROM t1 WINDOW w AS (PARTITION BY dept ORDER BY salary);
Why this works
Define PARTITION BY in the WINDOW clause instead of the OVER reference.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 3264 ER_WINDOW_PARTITION_IN_LIST_PART
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