Am January 25, 2021 2:47:28 PM UTC schrieb "Olivier B."
:
>Oh, you are right, thanks. I thought the + operator was on a QString
>and
>adding a char would be faster than adding a 1-char string, but it just
>changed the char* pointer address instead.
>
>Le lun. 25 janv. 2021 à 15:32, Giuseppe
Oh, you are right, thanks. I thought the + operator was on a QString and
adding a char would be faster than adding a 1-char string, but it just
changed the char* pointer address instead.
Le lun. 25 janv. 2021 à 15:32, Giuseppe D'Angelo via Interest <
interest@qt-project.org> a écrit :
> Hi,
>
>
+1 ... this has indeed bitten me more times than I like to admit!
Bob Hairgrove
--
On 25.01.21 15:27, Giuseppe D'Angelo via Interest wrote:
Hi,
Il 25/01/21 13:56, Olivier B. ha scritto:
fields += (fields.isEmpty() ? "" : ", ") + '"' + field + '"';
QStringBuilder usage is a red
Hi,
Il 25/01/21 13:56, Olivier B. ha scritto:
fields += (fields.isEmpty() ? "" : ", ") + '"' + field + '"';
QStringBuilder usage is a red herring, pay close attention at what
you're doing in the first +: you're summing a const char * (result of
the ternary operator) with a char;
Am January 25, 2021 12:56:45 PM UTC schrieb "Olivier B."
:
>Compiling with QT 5.11.1 & QT_USE_QSTRINGBUILDER, i get an error with
>the
>following code block:
>
> QString generateQuery(const QString& tableName, const QStringList&
>columns, int count)
> {
>QString fields = "*";
>if
Just an idea, not having to do with QStringBuilder ... why not do
something like this?
QString fields = columns.join(", ");
if (fields.isEmpty()) fields = "*";
// ...
AFAIK it is only necessary to enclose field names in quotes if the name
is an SQL keyword. If you still need to quote them, I
Compiling with QT 5.11.1 & QT_USE_QSTRINGBUILDER, i get an error with the
following code block:
QString generateQuery(const QString& tableName, const QStringList&
columns, int count)
{
QString fields = "*";
if (!columns.isEmpty())
{
fields.clear();
for (const QString&
