EC
1701
MySQLERRORCriticalStored RoutinesHIGH confidence

GET STACKED DIAGNOSTICS cannot be used outside a condition handler

Production Risk

Low — procedure fails to execute correctly.

What this means

GET STACKED DIAGNOSTICS is only valid inside a DECLARE ... HANDLER block. Using it elsewhere raises this error.

Why it happens
  1. 1Calling GET STACKED DIAGNOSTICS outside of a CONTINUE or EXIT HANDLER in a stored procedure.
How to reproduce
trigger — this will error
trigger — this will error
CREATE PROCEDURE p()
BEGIN
  GET STACKED DIAGNOSTICS CONDITION 1 @msg = MESSAGE_TEXT;
END;

expected output

ERROR 1701 (HY000): GET STACKED DIAGNOSTICS when handler not active.

Fix

Use GET STACKED DIAGNOSTICS only inside a handler

Use GET STACKED DIAGNOSTICS only inside a handler
CREATE PROCEDURE p()
BEGIN
  DECLARE CONTINUE HANDLER FOR SQLEXCEPTION
  BEGIN
    GET STACKED DIAGNOSTICS CONDITION 1 @msg = MESSAGE_TEXT;
  END;
  -- trigger some error
END;

Why this works

Stacked diagnostics are only populated when an active condition handler is executing.

What not to do

✕

Sources
Official documentation ↗

MySQL 8.0 — 1701 ER_GET_STACKED_DA_WITHOUT_ACTIVE_HANDLER

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