triggered data change violation
SQLSTATE 27000 is raised when a trigger or rule attempts to modify a table that is not allowed to be modified in the current trigger firing context — for example, modifying a table during a before-row trigger that is invoked by a foreign key constraint check.
- 1A trigger attempts to modify a table that is the subject of the triggering operation in a prohibited way
- 2A rule attempts a data modification that violates trigger-based constraints
Trigger attempting to modify the triggering table in an illegal way.
expected output
ERROR: triggered data change violation
Fix
Refactor trigger logic to avoid prohibited modifications
WHEN When a trigger causes 27000.
Why this works
Review the trigger to ensure it does not modify tables in a way that violates the current execution context. Use AFTER triggers instead of BEFORE triggers for complex modifications, or use deferred constraints.
Class 27 — Triggered Data Change Violation
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