John Stanton a écrit :
Alain Bertrand wrote:
In a Qt4 application, I have the following bit of code :
QString s;
bool b;
QSqlQuery q;
QSqlError err;
s= "CREATE TABLE ttd_bdata (sheetId integer primary key,";
s+="creation_date date, modif_date date,";
s+="speciesId integer,USDA_zone integer,";
s+="generalities text,propagation text,care text,";
s+="esthetics text, phyto text,miscellaneous text)";
//s="SELECT * FROM ttd_species WHERE speciesId=4";
qWarning( s.toAscii() );
b=q.exec( s );
Executing the query fails with the following information
SQL logic error or missing database
Unable to fetch row
Err number 1.
I have found the solution in the qt4 doc :
-----------------------------------------------------
The driver is locked for updates while a select is executed. This may
cause problems when using QSqlTableModel because Qt's item views fetch
data as needed (with QSqlQuery::fetchMore() in the case of QSqlTableModel).
----------------------------------------------------
To avoid the problem, one may use the clear() method of the QSqlQuery.
Alain
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