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Re: Problem with SqlUpdate [message #45728 is a reply to message #45725]

Tue, 29 December 2015 20:05

dolik.rce
Messages: 1791
Registered: August 2008
Location: Czech Republic

Ultimate Contributor

nilrum wrote on Tue, 29 December 2015 17:48

Quote:
The problematic brackets come from SqlSet(). You actually want just a single value, not a set of values:

SqlUpdate(LINK)(ID_OTHER, SqlSet(Select(ID_TWO).From(TWO).Where(NAME_TWO == "Name"))).Where(ID_LINK == 1);

This should work as you intended.

So I tried to write, but I receive an error
error C2664: 'Upp::SqlUpdate &Upp::SqlUpdate::operator ()(const Upp::SqlId &,Upp::SqlVal)' : cannot convert argument 1 from 'Upp::SqlId' to 'const Upp::SqlSet &'
Reason: cannot convert from 'Upp::SqlId' to 'const Upp::SqlSet'

I'm sorry that I mislead you... I haven't actually check if the code compiles Embarassed

I had to check the code of SqlSelect and I finally figured out how this should be done properly:

SqlUpdate(LINK)(ID_OTHER, Select(ID_TWO).From(TWO).Where(NAME_TWO == "Name").AsValue()).Where(ID_LINK == 1);

Notice the AsValue() method of SqlSelect. It turns the subquery into SqlVal, which can be then assigned to ID_OTHER column. There is also similar method AsTable(), which does similar job in case of subqueries in FROM clause.

Hope this will finally work Smile

Honza

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