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Description

This error indicates an attempt to modify a table (e.g., using UPDATE, INSERT, DELETE) while another process is executing a CREATE TABLE ... SELECT statement that involves the same or a related table. It highlights a concurrency issue where an update operation collides with a table creation process, often due to locking or resource contention.

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Error Message

Can't update table '%s' while '%s' is being created.

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Known Causes

3 known causes

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Simultaneous DML and DDL

An update or insert statement targets a table concurrently with a CREATE TABLE ... SELECT operation involving that table or a related one.

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Prolonged Table Creation

A CREATE TABLE ... SELECT statement takes a long time, leading to an extended period where the affected tables are locked or unavailable for updates.

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Transactional Locking Conflict

A transaction attempting an update cannot acquire the necessary lock on a table because it's held by another transaction performing a CREATE TABLE ... SELECT.

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Solutions

3 solutions available

1. Wait for Schema Change to Complete easy

Allow the ongoing table creation process to finish before attempting the update.

1

Identify the process creating the table. This might involve checking active threads or logs.

SHOW FULL PROCESSLIST;

2

Observe the `State` column in the `SHOW FULL PROCESSLIST` output. Look for states related to table creation (e.g., 'Creating table', 'Altering table').

3

Wait until the process creating the table has completed. Once it's done, retry your original update statement.

-- Retry your original UPDATE statement here

2. Check for Concurrent DDL Operations medium

Investigate and potentially pause other Data Definition Language (DDL) operations that might be interfering.

1

Use `SHOW FULL PROCESSLIST` to identify any active DDL statements (e.g., `CREATE TABLE`, `ALTER TABLE`, `DROP TABLE`).

SHOW FULL PROCESSLIST;

2

If you find other DDL operations running concurrently on related tables, determine if they can be temporarily halted or postponed.

3

If possible, pause or cancel the interfering DDL operation. Then, retry your update statement.

-- If you need to cancel a process, get its ID from SHOW FULL PROCESSLIST
-- KILL <process_id>;

4

After your update is successful, you can resume or re-execute the postponed DDL operation.

3. Review and Optimize Application Logic advanced

Ensure your application's code isn't inadvertently triggering concurrent table operations.

1

Examine the application code that performs database operations. Look for sections that might be executing `CREATE TABLE` or similar DDL statements simultaneously with `UPDATE` statements.

2

Implement proper locking mechanisms or transaction management within your application to serialize table creation and modification operations.

// Example in a hypothetical application logic

// Before creating a table, ensure no updates are in progress on it
// Or, before updating, ensure no table creation is in progress

// This might involve using application-level locks or database-level locks if appropriate.

3

Consider using a queueing system for database schema changes to ensure they are processed sequentially.

4

If your application uses a framework, consult its documentation for best practices regarding concurrent database access and schema management.

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Related Errors

5 related errors

MariaDB Error 1746: Concurrent Table Update Conflict