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I'm currently facing a problem while I'm adding a trigger to the database that I use at home.

I'm using : Oracle Database 12c Enterprise Edition Release - 64bit Production

The problem that occurs is that, when I add my trigger it compiles, but impossible to access to the content of a VARCHAR2 variable, even if it contains something.

    typeEngine engine.type%TYPE = '74E';--engine.type is a VARCHAR2(4)

SELECT engine.capacity INTO capacityMax
FROM engine
WHERE engine.type = typeEngine;

That returns me a NO DATA FOUND Exception, but the data is in the database.

Thanking you all in advance if someone has the solution to solve that issue.

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similar problem was here:… – Franek Mar 9 '14 at 20:55
@Franek OP explicitly stated engine.type is varchar2(4) so this can't be char vs. varchar2 issue. – user272735 Mar 10 '14 at 5:19
I assume that you have an id field. Please show us the output of the following query: SELECT DUMP(engine.type, 1016),engine.type FROM engine where; The expression ´where id=12345´ should be replaced by an appropriate expression. Maybe type is an sql or pl/sql keyword so replace engine.type by engine."TYPE" in your pl/sql code to avoid ambiguities and run your code again. – miracle173 Mar 10 '14 at 7:08
Can you show the entire trigger script? Including the create or replace – Threaten Mar 11 '14 at 23:04

It may probably no longer be a problem, but in the code it seems you forgot that the assignment operator is :=, not =, so typeEngine would be null and the query returns no rows.

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