<p>MySQL raises ER_TRG_IN_WRONG_SCHEMA when you create a trigger in one database but reference a table in a different schema.</p>
<p>MySQL Error 1435: ER_TRG_IN_WRONG_SCHEMA occurs when a trigger is defined in one database while pointing to a table that lives in another schema. Create the trigger in the same database or fully qualify the table name to resolve the issue.</p>
Trigger in wrong schema
Error 1435 fires when MySQL detects that a CREATE TRIGGER statement mixes schemas. The trigger is declared in database A but its target table belongs to database B, so the server blocks the operation.
The restriction keeps trigger execution predictable. A trigger must live in the same schema as the table it monitors, otherwise permissions, replication, and backup logic become unreliable.
The error appears if the current database is not the one that owns the table named in the CREATE TRIGGER statement. Using a fully qualified table name that points elsewhere also triggers the problem.
Another cause is running the statement while connected to the wrong database in a client session. Even correct SQL will fail if the default schema is incorrect.
Switch to the correct database with a USE statement before executing CREATE TRIGGER, or prefix the trigger name with the correct schema and remove the schema qualifier from the table reference.
Ensure the DEFINER user has privileges on both the trigger and the table so that moving the statement to the proper database will execute successfully.
Developers often write migration scripts that forget to switch schemas. Add an explicit USE db_name; at the top of each script to avoid surprises.
Automated tools sometimes generate triggers in a staging database while pointing to production tables. Review generated DDL and adjust the schema names to match.
Always run SHOW TRIGGERS to verify location before deploying. Use separate migration files per schema to keep context clear.
Adopt a code review checklist that flags cross-schema table names inside CREATE TRIGGER statements. Galaxy’s editor highlights mismatched schema references in real time, preventing commits that would later fail.
Error 1142 (ER_TABLEACCESS_DENIED_ERROR) signals insufficient privileges on the target table. Grant the needed rights and rerun.
Error 1235 (ER_NOT_ALLOWED_COMMAND) may appear if a read-only slave executes the trigger creation. Promote or switch to the primary node first.
Using CREATE TRIGGER in database A while pointing to table B.orders immediately raises the error.
Running the statement after connecting to the server without issuing USE correct_db; causes MySQL to treat the trigger as belonging to the wrong schema.
Generated SQL from ORMs or CI pipelines may prepend schema qualifiers inconsistently, leading to schema mismatches.
Appears when the DEFINER lacks CREATE TRIGGER privileges.
Raised if the target table does not exist in the selected schema.
Occurs when a trigger with the same name already exists on the target table.
Yes. MySQL requires that both objects exist in the same database to keep permissions and replication consistent.
No. Even the root user cannot create a cross-schema trigger; the server will still raise error 1435.
Galaxy’s SQL editor warns about mismatched schema references in real time and suggests adding USE statements, reducing runtime errors.
No. Fully qualifying the trigger does not change the rule that the monitored table must be in the same schema.
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