1427
MariaDBerrorddlhigh confidence
For DECIMAL(M,D), M must be >= D
Production Risk
Low — DDL fails; no data affected.
What this means
In a DECIMAL(M,D), FLOAT(M,D), or DOUBLE(M,D) declaration, the scale D is greater than the precision M.
Why it happens
- 1DECIMAL(5, 10) — scale 10 exceeds precision 5
- 2Typo in column definition
How to reproduce
trigger — this will error
trigger — this will error
CREATE TABLE t (price DECIMAL(5, 10));
expected output
ERROR 1427 (42000): For float(M,D), double(M,D) or decimal(M,D), M must be >= D (column 'price')
Fix
Ensure M >= D
Ensure M >= D
CREATE TABLE t (price DECIMAL(12, 4));
Why this works
Precision must accommodate all digits including the scale.
Sources
Official documentation ↗
MySQL 8.0 — 1427 ER_M_BIGGER_THAN_D
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