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Description

This error indicates that a database trigger, designed to execute automatically on specific events, contains an error within its SQL body. It occurs when MariaDB encounters malformed syntax, invalid object references, or logical flaws during the trigger's definition or execution.

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Error Message

Unknown trigger has an error in its body: '%s'

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Known Causes

3 known causes

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Syntax Errors in Trigger Definition

The SQL statements within the trigger's BEGIN...END block contain syntax mistakes, such as typos, incorrect keywords, or missing delimiters, preventing proper parsing.

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Invalid Object References

The trigger body attempts to reference tables, columns, or functions that do not exist, are misspelled, or are not accessible within the trigger's scope.

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Logical Errors or Data Type Mismatches

The trigger's internal logic contains flaws, such as operations between incompatible data types or incorrect conditional statements, that lead to runtime execution failures.

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Solutions

3 solutions available

1. Inspect and Correct Trigger Syntax easy

Directly examine and fix the SQL syntax within the problematic trigger.

1

Identify the exact trigger causing the error. The error message '%s' usually contains the name of the trigger or the table it's associated with. If not, you might need to list all triggers to find it.

SHOW TRIGGERS;

2

Retrieve the current definition of the problematic trigger to see its body.

SHOW CREATE TRIGGER trigger_name;

3

Carefully review the output of `SHOW CREATE TRIGGER`. Look for common SQL syntax errors such as missing semicolons, incorrect keywords, mismatched parentheses, invalid variable names, or incorrect use of `NEW` and `OLD` keywords. The '%s' in the error message might provide a hint to the specific line or section with the syntax issue.

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4

Once the syntax error is identified, use the `ALTER TRIGGER` statement to correct it. Replace `trigger_name`, `trigger_time`, `trigger_event`, `trigger_table`, and the corrected `trigger_body` with your specific values.

ALTER TRIGGER trigger_name
SET NEW TRIGGER_BODY; -- Replace with your corrected SQL code
-- Example:
-- ALTER TRIGGER my_before_insert_trigger
-- SET NEW BEGIN IF NEW.column_name IS NULL THEN SET NEW.column_name = 'default_value'; END IF; END;

5

Verify the trigger was altered successfully.

SHOW CREATE TRIGGER trigger_name;

2. Recreate the Trigger medium

Drop and re-create the trigger with a corrected definition.

1

Identify the trigger that is causing the error. Refer to the error message or use `SHOW TRIGGERS;` if necessary.

SHOW TRIGGERS;

2

Save the current definition of the trigger. This is crucial to ensure you don't lose your existing logic if you need to revert or compare.

SHOW CREATE TRIGGER trigger_name;

3

Drop the problematic trigger.

DROP TRIGGER trigger_name;

4

Carefully examine the saved `SHOW CREATE TRIGGER` output. Correct any identified syntax errors in the trigger body. Pay close attention to the SQL statements within the `BEGIN...END` block.

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5

Re-create the trigger with the corrected syntax. Ensure you use the correct `CREATE TRIGGER` syntax, including the trigger name, timing (BEFORE/AFTER), event (INSERT/UPDATE/DELETE), table, and the corrected SQL body.

CREATE TRIGGER trigger_name
trigger_time trigger_event ON trigger_table
FOR EACH ROW
BEGIN
    -- Your corrected SQL statements here
END;

6

Test the trigger to ensure it functions as expected and no longer produces the 1711 error.

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3. Isolate and Test Trigger Logic medium

Break down the trigger's logic and test each part individually.

1

Retrieve the full definition of the problematic trigger.

SHOW CREATE TRIGGER trigger_name;

2

Extract the SQL statements from the trigger's `BEGIN...END` block. If the trigger body contains multiple statements, try to isolate each one.

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3

Create a temporary table or use existing data that mimics the conditions under which the trigger is supposed to execute. Then, execute each extracted SQL statement individually against this test environment. This will help pinpoint which specific statement within the trigger body is causing the syntax error.

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4

Once the erroneous statement is identified, correct its syntax. You might need to refer to MariaDB documentation for the correct syntax of the specific SQL command being used (e.g., `SET`, `IF`, `CASE`, procedural statements).

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5

Reconstruct the trigger's body with the corrected statement and re-apply the trigger using `ALTER TRIGGER` or by dropping and recreating it.

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Related Errors

5 related errors

MariaDB Error 1711: Trigger Body Syntax