1934
MariaDBERRORNotableDDLHIGH confidence
Too many fields in partition function
Production Risk
Low — DDL is rejected.
What this means
The PARTITION BY COLUMNS clause lists more columns than MySQL allows. The maximum number of columns in a COLUMNS partitioning list is 16.
Why it happens
- 1Listing more than 16 columns in PARTITION BY RANGE COLUMNS(...) or LIST COLUMNS(...).
How to reproduce
trigger — this will error
trigger — this will error
-- CREATE TABLE with more than 16 columns in PARTITION BY RANGE COLUMNS(...)
expected output
ERROR 1934 (HY000): Too many fields in partition function.
Fix
Reduce the number of partitioning columns to 16 or fewer
Reduce the number of partitioning columns to 16 or fewer
-- Limit columns in COLUMNS(...) to at most 16
Why this works
MySQL enforces a hard limit of 16 columns in COLUMNS partitioning.
Sources
Official documentation ↗
MySQL 8.0 — 1934 ER_TOO_MANY_PARTITION_FUNC_FIELDS_ERROR2
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