<p>MySQL raises error 1517 ER_SAME_NAME_PARTITION when a CREATE or ALTER TABLE statement references a partition name that already exists in the table definition.</p>
<p>MySQL Error 1517 ER_SAME_NAME_PARTITION appears when you try to create or alter a partitioned table using a name that is already in use. Rename or drop the conflicting partition, or choose unique partition names, to resolve the issue swiftly.</p>
Duplicate partition name %s
Error 1517 fires with message Duplicate partition name when MySQL detects that the partition name supplied in a CREATE TABLE or ALTER TABLE statement already exists in the target table. Because each partition must be uniquely identifiable, the server rejects the operation.
The error is thrown by the storage engine during the parsing of the partition clause, before any data definition changes are committed, preventing accidental corruption of existing partitions.
The most common trigger is issuing ALTER TABLE ... ADD PARTITION and reusing a partition name that the table already owns. MySQL compares names case-insensitively on most platforms, so even mixed-case variations collide.
Another cause is executing a CREATE TABLE statement with a partition list that unintentionally duplicates a name between definitions, often after copy-pasting template code.
First, confirm the existing partition names with SHOW CREATE TABLE or SELECT PARTITION_NAME FROM INFORMATION_SCHEMA.PARTITIONS. Then decide whether to rename, drop, or skip the duplicate partition in your DDL.
Use ALTER TABLE ... REORGANIZE PARTITION to rename, or ALTER TABLE ... DROP PARTITION to remove the old partition before adding a new one with the desired name.
When archiving data monthly, scripts sometimes attempt to add partition p202406 twice. Ensure automation checks for existence before issuing ADD PARTITION.
During table cloning, developers may reuse the original partition list verbatim. Update partition names or convert to RANGE COLUMNS with AUTO partitioning to avoid manual duplication.
Adopt a clear naming convention, such as pYYYYMMDD for RANGE partitions, and generate names programmatically to guarantee uniqueness.
Validate partition metadata in CI pipelines using INFORMATION_SCHEMA before applying migrations. Tools like Galaxy can run pre-flight checks inside the SQL editor and block commits that would raise error 1517.
Error 1518 ER_PARTITION_ALREADY_EXISTS occurs when a partition with that name exists but is also specified for addition. The fix is similar: rename or omit the duplicate.
Error 1507 ER_PARTITION_CLAUSE_ON_NONPARTITIONED prevents partition clauses on non-partitioned tables. Convert the table to partitioned before adding definitions.
The initial table definition lists the same partition name twice, usually due to a copy-paste mistake.
An ALTER TABLE statement adds a partition whose name matches one already present in the table.
Partition names pJan and pJAN collide because MySQL compares names without case sensitivity on most file systems.
Raised when the same partition is both present and specified for addition in the same statement.
Occurs when you attempt to drop a partition that MySQL cannot find by name.
Triggers on duplicate filegroup names, conceptually similar to partition name duplication in NDB Cluster.
No. MySQL treats partition names case-insensitively on most systems by default, so you must ensure unique names.
REORGANIZE PARTITION acquires a metadata lock and may copy data, so schedule it during low traffic windows for large tables.
MySQL does not support an IF NOT EXISTS clause for partitions. You must script a check using INFORMATION_SCHEMA.
Galaxy surfaces partition metadata inline, flags duplicate names in real time, and lets teams peer review DDL before execution, reducing the chance of error 1517.
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