I need to change the returned value of a sequence stored into a H2DB, when i call nextVal through a direct SQL query H2 return a BigInt and i need a BigDecimal.
I can't cast or convert this value, I need H2 returning a BigDecimal.
How I can do that?
EDIT: I can't change the Java code beacuse I'm testing so cast or convert the request value from DB is not a option.
You could create you own patched version of H2, if you are allowed to replace the H2 jar file.
In org.h2.expression.Function
change
addFunctionNotDeterministic("NEXTVAL", NEXTVAL,
VAR_ARGS, Value.LONG);
to
addFunctionNotDeterministic("NEXTVAL", NEXTVAL,
VAR_ARGS, Value.DECIMAL);
and in org.h2.expression.SequenceValue
change
@Override
public Value getValue(Session session) {
long value = sequence.getNext(session);
session.setLastIdentity(ValueLong.get(value));
return ValueLong.get(value);
}
@Override
public int getType() {
return Value.LONG;
}
to
@Override
public Value getValue(Session session) {
long lv = sequence.getNext(session);
ValueDecimal value = ValueDecimal.get(BigDecimal.valueOf(lv));
session.setLastIdentity(value);
return value;
}
@Override
public int getType() {
return Value.DECIMAL;
}
I've tried to take the code from wero 's answer and make this into a feature in H2 itself.
This GitHub fork: https://github.com/portofrotterdam/h2database returns BigDecimals instead of BigInteger/longs when using 'MODE=Oracle' in H2, making it more compatible with Oracle's database.
I've requested a pull to the master so perhaps this behaviour will be available in h2database.
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