1604
MySQLERRORCommonPartitioningHIGH confidence
Too many fields in partitioning function
Production Risk
Low — the DDL fails; no table is created.
What this means
The COLUMNS partition list or partition function references more columns than MySQL allows.
Why it happens
- 1Specifying more than the maximum allowed number of columns in a COLUMNS partition definition.
How to reproduce
trigger — this will error
trigger — this will error
-- Exceeding the 16-column limit for COLUMNS partitioning
expected output
ERROR 1604 (HY000): Too many fields in 'partition function'
Fix
Reduce the number of columns in the COLUMNS list
Reduce the number of columns in the COLUMNS list
-- Use at most 16 columns in a COLUMNS partition definition.
Why this works
MySQL supports a maximum of 16 columns in a COLUMNS partitioning list.
Sources
Official documentation ↗
MySQL 8.0 — 1604 ER_TOO_MANY_PARTITION_FUNC_FIELDS_ERROR
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