<p>MySQL error 1446 arises when a DEFINER clause is missing the required user@host format while creating or altering a routine, view, or trigger.</p>
<p>MySQL Error 1446: ER_MALFORMED_DEFINER appears when the DEFINER clause is not written as user@host. Correct the DEFINER to a fully qualified account to resolve the issue.</p>
Definer is not fully qualified
MySQL raises error 1446 with the message Definer is not fully qualified when a database object specifies an invalid DEFINER clause.
The DEFINER must include both the user and host (for example, admin@localhost). Omitting either part or using wildcards incorrectly triggers this error during CREATE or ALTER statements.
The error most frequently shows up while creating views, stored procedures, functions, or triggers that include a DEFINER clause.
It can also surface when importing dumps that were generated on another server where the referenced account does not exist or uses a different host segment.
The DEFINER clause is syntactically wrong or references a user without an associated host. MySQL requires the pattern 'user'@'host'.
The DEFINER account might not exist on the destination server, or SQL_MODE='NO_AUTO_CREATE_USER' blocks implicit account creation, causing the malformed qualifier to be rejected.
Rewrite the DEFINER clause using a valid account that exists on the target server. If the object does not require elevated privileges, dropping the clause completely also works.
Ensure the account has the necessary privileges to execute the routine or view, and that the host portion matches the connection host or the desired wildcard.
During schema migration, replace hard-coded definers from another environment with CURRENT_USER or an application role relevant to the new server.
In automated CI pipelines, configure mysqldump with --set-gtid-purged=OFF --routines --triggers --skip-definer to suppress problematic DEFINER clauses in exports.
Standardize on CURRENT_USER for development objects or create a dedicated service account with global routine privileges for production deployments.
Audit dumps before import using sed or a custom script to replace invalid definer strings, and maintain user creation scripts in version control.
Error 1227: Access denied - occurs when the definer lacks required privileges. Grant EXECUTE or SUPER to resolve.
The DEFINER lists only the username, such as 'reporting', without @host, leading to a malformed identifier.
Using *@* or leaving quotes out violates the expected user@host syntax and triggers the parser error.
The specified user@host is not present in mysql.user, so MySQL treats the reference as malformed.
Imported SQL files carry definer strings valid on the source server but invalid on the destination.
Occurs when the defined account lacks EXECUTE privilege. Grant necessary rights or change definer.
Raised when the definer account does not exist. Create the account or adjust the clause.
Appears if the invoker lacks SELECT on base tables in a view. Grant table privileges.
Signifies underlying table or column missing, often uncovered after fixing definer issues.
Yes. If your security model relies on invoker rights, omitting the DEFINER avoids account coupling and eliminates error 1446.
Always use 'user'@'host', for example 'admin'@'localhost' or 'svc_read'@'%'. Both parts are mandatory.
Using CURRENT_USER dynamically substitutes the creating account, ensuring the definer is valid on any server where the creator exists.
Galaxy highlights syntax errors in real time and lets teams enforce lint rules so malformed definers cannot be committed or shared.
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