1682
MariaDBWARNINGCriticalDDLHIGH confidence
The ZEROFILL attribute is deprecated and will be removed in a future release
Production Risk
Low — warning only; behaviour unchanged until the attribute is removed.
What this means
MySQL warns that the ZEROFILL attribute for numeric columns is deprecated. Use LPAD() or application-level formatting instead.
Why it happens
- 1Declaring a column with ZEROFILL modifier in CREATE TABLE or ALTER TABLE.
How to reproduce
trigger — this will error
trigger — this will error
CREATE TABLE t (n INT ZEROFILL);
expected output
Warning (Code 1682): The ZEROFILL attribute is deprecated and will be removed in a future release. Use the LPAD function to zero-pad numbers, or store the formatted numbers in a CHAR column.
Fix
Replace ZEROFILL with LPAD in queries
Replace ZEROFILL with LPAD in queries
SELECT LPAD(n, 5, '0') AS padded FROM t;
Why this works
LPAD provides the same visual result without a deprecated column attribute.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 1682 ER_WARN_DEPRECATED_ZEROFILL
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