Обсуждение: FOR UPDATE is not allowed in this context

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FOR UPDATE is not allowed in this context

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Greetings:
 
When precompiling the following sentence the precompiler shows the message
"FOR UPDATE is not allowed in this context".
 
EXEC SQL SELECT camp_1 INTO :n1 WHERE llave = :var_llave FOR UPDATE;
 
It seems to be a problem with the host variables because it precompiles well
the following sentence:
 
EXEC SQL SELECT camp_1 INTO :n1 WHERE llave = 'abcd' FOR UPDATE;
 
Thanks in advance for your help,
 
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Jhon Orellana.
Quito - Ecuador
South America