<p>The error appears when an ALTER TABLE … DROP PARTITION statement references a partition name that does not exist in the target table.</p>
<p>MySQL Error 1507 ER_DROP_PARTITION_NON_EXISTENT is raised when you try to drop a partition that the table no longer has. Confirm partition names with SHOW CREATE TABLE or INFORMATION_SCHEMA.PARTITIONS, then rerun ALTER TABLE … DROP PARTITION with the correct names or add IF EXISTS to avoid failure.</p>
Error in list of partitions to %s
Error 1507 fires when MySQL cannot find one or more partition names listed in an ALTER TABLE … DROP PARTITION command. The server stops the statement because deleting an undefined partition would corrupt data metadata.
The SQL state HY000 indicates a general execution error. Because the partition list is validated early, no rows are touched, but the DDL fails and subsequent statements in the same batch may not execute.
Failed DDL leaves the table unchanged, but scripts may halt, deployments roll back, and replication may break if the primary keeps the invalid statement. Fixing it quickly keeps your pipeline and Galaxy CI jobs healthy.
Most cases trace back to typos, race-conditions, or misunderstood partitioning schemes. Details appear below.
Validate existing partition names, adjust the DROP PARTITION list, or upgrade syntax with IF EXISTS. SQL samples follow.
Automation scripts often drop yesterday’s partition after data aging. If retention logic miscalculates the date, the partition name becomes invalid and triggers Error 1507. Adding a pre-check query avoids the issue.
Always derive partition names from the same function used during creation, keep SHOW CREATE TABLE snapshots in Git, and add protection with IF EXISTS in MySQL 8.0.29+.
Errors 1508, 1517, and 1730 involve other partition mis-operations. Fixes often rely on similar metadata checks.
A simple typo in the partition name leads MySQL to believe the partition never existed.
Retention jobs may have successfully removed the partition on a prior run, leaving none to drop now.
The script might generate partition labels like p20240101 while the table uses p_20240101.
Altering the table engine from partition-capable to non-partitioned erases partition metadata but the cleanup script may not reflect the change.
On replicas, partitions may differ from the primary after failover, producing the error when the same DDL propagates.
Raised when NULL is supplied as a partition name in a DROP PARTITION list.
Occurs while trying to add a partition that conflicts with existing partition descriptions.
Indicates duplicate partition names during CREATE or ALTER TABLE operations.
Yes. Starting in MySQL 8.0.29, you can append IF EXISTS to silently ignore missing partitions.
No data reads or writes are interrupted. Only the failing DDL statement is rolled back.
Query INFORMATION_SCHEMA.PARTITIONS, build a dynamic ALTER statement with valid names, and wrap the operation in a transaction.
Galaxy's AI copilot flags unknown partition names by cross-checking schema metadata, reducing the chance of firing an invalid DROP.
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