How to Remove DEFINER Clauses from MySQL Dumps?

Removing DEFINER Clauses from MySQL Dumps

MySQL dumps often include DEFINER clauses within CREATE VIEW and CREATE PROCEDURE statements, such as "DEFINER=root@localhost". These clauses can be undesirable in certain scenarios. This article explores methods to remove these clauses from MySQL dump files.

Solutions:

1. Text Editor Replacement:

Open the dump file in a text editor and perform a global search and replace. Find all instances of "DEFINER=@" and replace them with an empty string.

2. Perl Command:

Edit the dump file using Perl with the following command:

perl -p -i.bak -e "s/DEFINER=\`\w.*\`@\`\d[0-3].*[0-3]\`//g" mydatabase.sql

This will remove all DEFINER clauses from the dump file and create a backup with a ".bak" extension.

3. Sed Piping:

Pipe the output of mysqldump through sed to remove the DEFINER clauses:

mysqldump ... | sed -e 's/DEFINER[ ]*=[ ]*[^*]*\*/\*/' > triggers_backup.sql

This command will create a new dump file named "triggers_backup.sql" with the DEFINER clauses removed.

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