Why Does My MySQL Query Import Fail with Error Code 2013?

Resolving Server Connectivity Issues During MySQL Query Imports

When importing data from a large CSV file into a MySQL table, it's possible to encounter error code 2013, indicating a lost connection to the server. This issue can arise due to various factors, including:

• Exceeding packet size limits: MySQL has a default maximum packet size of 16MB. If the row data or the imported CSV file exceeds this size, the connection may be terminated forcefully.
• Server settings: Insufficient values for certain MySQL server parameters, such as wait_timeout, can lead to premature connection drops during long-running queries.

Solutions:

To resolve these issues, consider implementing the following recommendations:

1. Adjust 'max_allowed_packet' setting: In the MySQL configuration file (my.cnf or my.ini), locate the [mysqld] section and add or modify the max_allowed_packet parameter to a higher value, such as 32MB or even higher if necessary. This increases the maximum packet size allowed per transaction.

2. Use command-line import: If the above solution doesn't resolve the issue, try importing the data using the MySQL command-line utility:

   mysql -u <user> --password=<password> <database name> <file_to_import

   This method bypasses the packet size limitation of the MySQL GUI and allows for larger imports.

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