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Sqlite: Add Sqlite::Value

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It adds a layer if you don't know if the type is integer, float or string.
It does not handle bytearrays here because so far there is no need. There
are two classes, Sqlite::Value and Sqlite::ValueView. Value owns the
string, ValueView holds only a view the string. So there is no allocation.
It is designed to hold Utf-8 string like Sqlite but it can be easily
converted in and from QString or QVariant but mind about that this is not
free. ValueView has no constructors on perpose because it would be
ambiguous if there would be constructors for the other primitives of
the Sqlite layer like "int64", "double" and "string view".

Change-Id: Ia39364eb2fc1998e5c59fdb4316add22c748507d
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
This commit is contained in:
Marco Bubke
2020-04-27 20:01:38 +02:00
committed by Tim Jenssen
parent 7554f89c71
commit 0e1870368c
13 changed files with 801 additions and 61 deletions
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43
src/libs/sqlite/sqlitebasestatement.cpp
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@@ -190,6 +190,21 @@ void BaseStatement::bind(int index, Utils::SmallStringView text)
checkForBindingError(resultCode);
}
void BaseStatement::bind(int index, const Value &value)
{
switch (value.type()) {
case ValueType::Integer:
bind(index, value.toInteger());
break;
case ValueType::Float:
bind(index, value.toFloat());
break;
case ValueType::String:
bind(index, value.toStringView());
break;
}
}
template <typename Type>
void BaseStatement::bind(Utils::SmallStringView name, Type value)
{
@@ -498,12 +513,34 @@ StringType BaseStatement::fetchValue(int column) const
return convertToTextForColumn<StringType>(m_compiledStatement.get(), column);
}
template SQLITE_EXPORT Utils::SmallStringView BaseStatement::fetchValue<Utils::SmallStringView>(
int column) const;
template SQLITE_EXPORT Utils::SmallString BaseStatement::fetchValue<Utils::SmallString>(
int column) const;
template SQLITE_EXPORT Utils::PathString BaseStatement::fetchValue<Utils::PathString>(
int column) const;
Utils::SmallStringView BaseStatement::fetchSmallStringViewValue(int column) const
{
return fetchValue<Utils::SmallStringView>(column);
}
template SQLITE_EXPORT Utils::SmallStringView BaseStatement::fetchValue<Utils::SmallStringView>(int column) const;
template SQLITE_EXPORT Utils::SmallString BaseStatement::fetchValue<Utils::SmallString>(int column) const;
template SQLITE_EXPORT Utils::PathString BaseStatement::fetchValue<Utils::PathString>(int column) const;
ValueView BaseStatement::fetchValueView(int column) const
{
int dataType = sqlite3_column_type(m_compiledStatement.get(), column);
switch (dataType) {
case SQLITE_INTEGER:
return ValueView::create(fetchLongLongValue(column));
case SQLITE_FLOAT:
return ValueView::create(fetchDoubleValue(column));
case SQLITE3_TEXT:
return ValueView::create(fetchValue<Utils::SmallStringView>(column));
case SQLITE_BLOB:
case SQLITE_NULL:
break;
}
return ValueView::create(0LL);
}
} // namespace Sqlite