Loading...

XML

Word

Printable

Details

Type: Bug
Resolution: Done
Priority: P3: Somewhat important
Fix Version/s: 4.8.1
Affects Version/s: 4.6.3, 4.7.0
Component/s: SQL Support
Labels:
- Fixed_by_Qt_Commercial

Commits:
68241a1d889b94156a63159fb7cdcffc10b9d397

Description

I was not able to create a test case to reproduce the issue but I have included a stack trace of an application that encounters the problem with Qt 4.6.3.

It looks like the problem arises if, for some reason, the driver is a QSqlNullDriver. Here is the suggested patch that seems fixing the problem.

diff --git a/src/sql/kernel/qsqldatabase.cpp b/src/sql/kernel/qsqldatabase.cpp
index 022bc47..b3dad08 100644
--- a/src/sql/kernel/qsqldatabase.cpp
+++ b/src/sql/kernel/qsqldatabase.cpp
@@ -135,7 +135,7 @@ public:
         port(-1)
     {
         ref = 1;
-        if(driver)
+        if(driver && (driver != shared_null()->driver))
             precisionPolicy = driver->numericalPrecisionPolicy();
         else
             precisionPolicy= QSql::LowPrecisionDouble;
@@ -1514,7 +1514,7 @@ void QSqlDatabase::setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy pr
 
     Returns the current default precision policy for the database connection.
 
-    \sa QSql::NumericalPrecisionPolicy, setNumericalPrecisionPolicy(), 
+    \sa QSql::NumericalPrecisionPolicy, setNumericalPrecisionPolicy(),
     QSqlQuery::numericalPrecisionPolicy(), QSqlQuery::setNumericalPrecisionPolicy()
 */
 QSql::NumericalPrecisionPolicy QSqlDatabase::numericalPrecisionPolicy() const