Inheritance diagram for QSQLiteResult:

Collaboration diagram for QSQLiteResult:

Public Member Functions
	QSQLiteResult (const QSQLiteDriver *db)

	~QSQLiteResult ()

QVariant	handle () const override
	Returns the low-level database handle for this result set wrapped in a QVariant or an invalid QVariant if there is no handle.

Public Member Functions inherited from QSqlResult
virtual	~QSqlResult ()
	Destroys the object and frees any allocated resources.

virtual QVariant	handle () const
	Returns the low-level database handle for this result set wrapped in a QVariant or an invalid QVariant if there is no handle.

Protected Member Functions
bool	gotoNext (QSqlCachedResult::ValueCache &row, int idx) override

bool	reset (const QString &query) override
	Sets the result to use the SQL statement query for subsequent data retrieval.

bool	prepare (const QString &query) override
	Prepares the given query for execution; the query will normally use placeholders so that it can be executed repeatedly.

bool	execBatch (bool arrayBind) override

bool	exec () override
	Executes the query, returning true if successful; otherwise returns false.

int	size () override
	Returns the size of the `SELECT` result, or -1 if it cannot be determined or if the query is not a `SELECT` statement.

int	numRowsAffected () override
	Returns the number of rows affected by the last query executed, or -1 if it cannot be determined or if the query is a `SELECT` statement.

QVariant	lastInsertId () const override
	Returns the object ID of the most recent inserted row if the database supports it.

QSqlRecord	record () const override
	Returns the current record if the query is active; otherwise returns an empty QSqlRecord.

void	detachFromResultSet () override

void	virtual_hook (int id, void *data) override

Protected Member Functions inherited from QSqlCachedResult
	QSqlCachedResult (QSqlCachedResultPrivate &d)

void	init (int colCount)

void	cleanup ()

void	clearValues ()

virtual bool	gotoNext (ValueCache &values, int index)=0

QVariant	data (int i) override
	Returns the data for field index in the current row as a QVariant.

bool	isNull (int i) override
	Returns `true` if the field at position index in the current row is null; otherwise returns `false`.

bool	fetch (int i) override
	Positions the result to an arbitrary (zero-based) row index.

bool	fetchNext () override
	Positions the result to the next available record (row) in the result.

bool	fetchPrevious () override
	Positions the result to the previous record (row) in the result.

bool	fetchFirst () override
	Positions the result to the first record (row 0) in the result.

bool	fetchLast () override
	Positions the result to the last record (last row) in the result.

int	colCount () const

ValueCache &	cache ()

void	virtual_hook (int id, void *data) override

void	detachFromResultSet () override

void	setNumericalPrecisionPolicy (QSql::NumericalPrecisionPolicy policy) override

Protected Member Functions inherited from QSqlResult
	QSqlResult (const QSqlDriver *db)
	Creates a QSqlResult using database driver db.

	QSqlResult (QSqlResultPrivate &dd)

int	at () const
	Returns the current (zero-based) row position of the result.

QString	lastQuery () const
	Returns the current SQL query text, or an empty string if there isn't one.

QSqlError	lastError () const
	Returns the last error associated with the result.

bool	isValid () const
	Returns `true` if the result is positioned on a valid record (that is, the result is not positioned before the first or after the last record); otherwise returns `false`.

bool	isActive () const
	Returns `true` if the result has records to be retrieved; otherwise returns `false`.

bool	isSelect () const
	Returns `true` if the current result is from a `SELECT` statement; otherwise returns `false`.

bool	isForwardOnly () const
	Returns `true` if you can only scroll forward through the result set; otherwise returns `false`.

const QSqlDriver *	driver () const
	Returns the driver associated with the result.

virtual void	setAt (int at)
	This function is provided for derived classes to set the internal (zero-based) row position to index.

virtual void	setActive (bool a)
	This function is provided for derived classes to set the internal active state to active.

virtual void	setLastError (const QSqlError &e)
	This function is provided for derived classes to set the last error to error.

virtual void	setQuery (const QString &query)
	Sets the current query for the result to query.

virtual void	setSelect (bool s)
	This function is provided for derived classes to indicate whether or not the current statement is a SQL `SELECT` statement.

virtual void	setForwardOnly (bool forward)
	Sets forward only mode to forward.

virtual bool	exec ()
	Executes the query, returning true if successful; otherwise returns false.

virtual bool	prepare (const QString &query)
	Prepares the given query for execution; the query will normally use placeholders so that it can be executed repeatedly.

virtual bool	savePrepare (const QString &sqlquery)
	Prepares the given query, using the underlying database functionality where possible.

virtual void	bindValue (int pos, const QVariant &val, QSql::ParamType type)
	Binds the value val of parameter type paramType to position index in the current record (row).

virtual void	bindValue (const QString &placeholder, const QVariant &val, QSql::ParamType type)
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Binds the value val of parameter type paramType to the placeholder name in the current record (row).

void	addBindValue (const QVariant &val, QSql::ParamType type)
	Binds the value val of parameter type paramType to the next available position in the current record (row).

QVariant	boundValue (const QString &placeholder) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Returns the value bound by the given placeholder name in the current record (row).

QVariant	boundValue (int pos) const
	Returns the value bound at position index in the current record (row).

QSql::ParamType	bindValueType (const QString &placeholder) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.Returns the parameter type for the value bound with the given placeholder name.

QSql::ParamType	bindValueType (int pos) const
	Returns the parameter type for the value bound at position index.

int	boundValueCount () const
	Returns the number of bound values in the result.

QVariantList &	boundValues (QT6_DECL_NEW_OVERLOAD)

QVariantList	boundValues (QT6_DECL_NEW_OVERLOAD) const

QString	executedQuery () const
	Returns the query that was actually executed.

QStringList	boundValueNames () const
	Returns the names of all bound values.

QString	boundValueName (int pos) const
	Returns the name of the bound value at position index in the current record (row).

void	clear ()
	Clears the entire result set and releases any associated resources.

bool	hasOutValues () const
	Returns `true` if at least one of the query's bound values is a `QSql::Out` or a QSql::InOut; otherwise returns `false`.

BindingSyntax	bindingSyntax () const
	Returns the binding syntax used by prepared queries.

virtual QVariant	data (int i)=0
	Returns the data for field index in the current row as a QVariant.

virtual bool	isNull (int i)=0
	Returns `true` if the field at position index in the current row is null; otherwise returns `false`.

virtual bool	reset (const QString &sqlquery)=0
	Sets the result to use the SQL statement query for subsequent data retrieval.

virtual bool	fetch (int i)=0
	Positions the result to an arbitrary (zero-based) row index.

virtual bool	fetchNext ()
	Positions the result to the next available record (row) in the result.

virtual bool	fetchPrevious ()
	Positions the result to the previous record (row) in the result.

virtual bool	fetchFirst ()=0
	Positions the result to the first record (row 0) in the result.

virtual bool	fetchLast ()=0
	Positions the result to the last record (last row) in the result.

virtual int	size ()=0
	Returns the size of the `SELECT` result, or -1 if it cannot be determined or if the query is not a `SELECT` statement.

virtual int	numRowsAffected ()=0
	Returns the number of rows affected by the last query executed, or -1 if it cannot be determined or if the query is a `SELECT` statement.

virtual QSqlRecord	record () const
	Returns the current record if the query is active; otherwise returns an empty QSqlRecord.

virtual QVariant	lastInsertId () const
	Returns the object ID of the most recent inserted row if the database supports it.

virtual void	virtual_hook (int id, void *data)

virtual bool	execBatch (bool arrayBind=false)

virtual void	detachFromResultSet ()

virtual void	setNumericalPrecisionPolicy (QSql::NumericalPrecisionPolicy policy)

QSql::NumericalPrecisionPolicy	numericalPrecisionPolicy () const

virtual bool	nextResult ()

void	resetBindCount ()
	Resets the number of bind parameters.

Friends
class	QSQLiteDriver

Additional Inherited Members
Public Types inherited from QSqlCachedResult
typedef QList< QVariant >	ValueCache

Protected Types inherited from QSqlResult
enum	BindingSyntax { PositionalBinding , NamedBinding }
	This enum type specifies the different syntaxes for specifying placeholders in prepared queries. More...

enum	VirtualHookOperation

Protected Attributes inherited from QSqlResult
QSqlResultPrivate *	d_ptr

Detailed Description

Definition at line 87 of file qsql_sqlite.cpp.

Constructor & Destructor Documentation

◆ QSQLiteResult()

QSQLiteResult::QSQLiteResult ( const QSQLiteDriver * db )

explicit

Definition at line 317 of file qsql_sqlite.cpp.

References QList< T >::append(), d, and results.

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◆ ~QSQLiteResult()

QSQLiteResult::~QSQLiteResult ( )

Definition at line 324 of file qsql_sqlite.cpp.

References d, QList< T >::removeOne(), and results.

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Member Function Documentation

◆ detachFromResultSet()

void QSQLiteResult::detachFromResultSet ( )

overrideprotectedvirtual

Reimplemented from QSqlCachedResult.

Definition at line 579 of file qsql_sqlite.cpp.

References d.

◆ exec()

bool QSQLiteResult::exec ( )

overrideprotectedvirtual

Executes the query, returning true if successful; otherwise returns false.

See also: prepare()

Reimplemented from QSqlResult.

Definition at line 402 of file qsql_sqlite.cpp.

References QList< T >::at(), ba, QSqlResult::boundValues(), QSqlCachedResult::clearValues(), QByteArray::constData(), QListSpecialMethodsBase< T >::contains(), d, QString::data(), dateTime, QString::fromUtf8(), i, Qt::ISODateWithMs, QSqlResult::isValid(), QSqlResultPrivate::isVariantNull(), QSqlResult::lastError(), qMakeError(), QSqlResult::setActive(), QSqlResult::setLastError(), QSqlResult::setSelect(), QString::size(), QByteArray::size(), QSqlError::StatementError, str, time, QCoreApplication::translate(), and QString::unicode().

Referenced by execBatch(), and reset().

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◆ execBatch()

bool QSQLiteResult::execBatch ( bool arrayBind )

overrideprotectedvirtual

Since: 4.2

Executes a prepared query in batch mode if the driver supports it, otherwise emulates a batch execution using bindValue() and exec(). QSqlDriver::hasFeature() can be used to find out whether a driver supports batch execution.

Batch execution can be faster for large amounts of data since it reduces network roundtrips.

For batch executions, bound values have to be provided as lists of variants (QVariantList).

Each list must contain values of the same type. All lists must contain equal amount of values (rows).

NULL values are passed in as typed QVariants, for example {QVariant(QMetaType::fromType<int>())} for an integer NULL value.

Example:

QSqlQuery q;
q.prepare("insert into test (i1, i2, s) values (?, ?, ?)");
 
QVariantList col1;
QVariantList col2;
QVariantList col3;
 
col1 << 1 << 3;
col2 << 2 << 4;
col3 << "hello" << "world";
 
q.bindValue(0, col1);
q.bindValue(1, col2);
q.bindValue(2, col3);
 
if (!q.execBatch())
    qDebug() << q.lastError();

Here, we insert two rows into a SQL table, with each row containing three values.

See also: exec(), QSqlDriver::hasFeature()

Reimplemented from QSqlResult.

Definition at line 379 of file qsql_sqlite.cpp.

References QSqlResult::bindValue(), d, exec(), i, QSql::In, it, Q_UNUSED, size(), and toList().

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◆ gotoNext()

bool QSQLiteResult::gotoNext	(	QSqlCachedResult::ValueCache &	row,
		int	idx
	)

overrideprotectedvirtual

Implements QSqlCachedResult.

Definition at line 543 of file qsql_sqlite.cpp.

References d.

◆ handle()

QVariant QSQLiteResult::handle ( ) const

overridevirtual

Returns the low-level database handle for this result set wrapped in a QVariant or an invalid QVariant if there is no handle.

Warning: Use this with uttermost care and only if you know what you're doing.; The handle returned here can become a stale pointer if the result is modified (for example, if you clear it).; The handle can be NULL if the result was not executed yet.; PostgreSQL: in forward-only mode, the handle of QSqlResult can change after calling fetch(), fetchFirst(), fetchLast(), fetchNext(), fetchPrevious(), nextResult().

The handle returned here is database-dependent, you should query the type name of the variant before accessing it.

This example retrieves the handle for a sqlite result:

QSqlDatabase db = QSqlDatabase::database("sales");
QSqlQuery query("SELECT NAME, DOB FROM EMPLOYEES", db);
 
QVariant v = query.result()->handle();
if (v.isValid() && qstrcmp(v.typeName(), "sqlite3_stmt*") == 0) {
    // v.data() returns a pointer to the handle
    sqlite3_stmt *handle = *static_cast<sqlite3_stmt **>(v.data());
    if (handle) {
        // ...
    }
}

This snippet returns the handle for PostgreSQL or MySQL:

if (qstrcmp(v.typeName(), "PGresult*") == 0) {
    PGresult *handle = *static_cast<PGresult **>(v.data());
    if (handle) {
        // ...
        }
}
 
if (qstrcmp(v.typeName(), "MYSQL_STMT*") == 0) {
    MYSQL_STMT *handle = *static_cast<MYSQL_STMT **>(v.data());
    if (handle) {
        // ...
        }
    }

See also: QSqlDriver::handle()

Reimplemented from QSqlResult.

Definition at line 586 of file qsql_sqlite.cpp.

References d, and QVariant::fromValue().

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◆ lastInsertId()

QVariant QSQLiteResult::lastInsertId ( ) const

overrideprotectedvirtual

Returns the object ID of the most recent inserted row if the database supports it.

An invalid QVariant will be returned if the query did not insert any value or if the database does not report the id back. If more than one row was touched by the insert, the behavior is undefined.

Note that for Oracle databases the row's ROWID will be returned, while for MySQL databases the row's auto-increment field will be returned.

See also: QSqlDriver::hasFeature()

Reimplemented from QSqlResult.

Definition at line 560 of file qsql_sqlite.cpp.

References d, and QSqlResult::isActive().

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◆ numRowsAffected()

int QSQLiteResult::numRowsAffected ( )

overrideprotectedvirtual

Returns the number of rows affected by the last query executed, or -1 if it cannot be determined or if the query is a SELECT statement.

See also: size()

Implements QSqlResult.

Definition at line 554 of file qsql_sqlite.cpp.

References d.

◆ prepare()

bool QSQLiteResult::prepare ( const QString & query )

overrideprotectedvirtual

Prepares the given query for execution; the query will normally use placeholders so that it can be executed repeatedly.

Returns true if the query is prepared successfully; otherwise returns false.

See also: exec()

Reimplemented from QSqlResult.

Definition at line 344 of file qsql_sqlite.cpp.

References d, QSqlResult::driver(), qMakeError(), QSqlResult::setLastError(), QSqlResult::setSelect(), QSqlError::StatementError, and QCoreApplication::translate().

Referenced by reset().

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◆ record()

QSqlRecord QSQLiteResult::record ( ) const

overrideprotectedvirtual

Returns the current record if the query is active; otherwise returns an empty QSqlRecord.

The default implementation always returns an empty QSqlRecord.

See also: isActive()

Reimplemented from QSqlResult.

Definition at line 571 of file qsql_sqlite.cpp.

References d, QSqlResult::isActive(), and QSqlResult::isSelect().

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◆ reset()

bool QSQLiteResult::reset ( const QString & query )

overrideprotectedvirtual

Sets the result to use the SQL statement query for subsequent data retrieval.

Derived classes must reimplement this function and apply the query to the database. This function is only called after the result is set to an inactive state and is positioned before the first record of the new result. Derived classes should return true if the query was successful and ready to be used, or false otherwise.

See also: setQuery()

Implements QSqlResult.

Definition at line 337 of file qsql_sqlite.cpp.

References exec(), and prepare().

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◆ size()

int QSQLiteResult::size ( )

overrideprotectedvirtual

Returns the size of the SELECT result, or -1 if it cannot be determined or if the query is not a SELECT statement.

See also: numRowsAffected()

Implements QSqlResult.

Definition at line 549 of file qsql_sqlite.cpp.

Referenced by execBatch().

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◆ virtual_hook()

void QSQLiteResult::virtual_hook	(	int	id,
		void *	data
	)

overrideprotectedvirtual

Reimplemented from QSqlCachedResult.

Definition at line 332 of file qsql_sqlite.cpp.

References QSqlCachedResult::virtual_hook().

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Friends And Related Symbol Documentation

◆ QSQLiteDriver

friend class QSQLiteDriver

friend

Definition at line 90 of file qsql_sqlite.cpp.

The documentation for this class was generated from the following file:

qtbase/src/plugins/sqldrivers/sqlite/qsql_sqlite.cpp

Public Member Functions

Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QSQLiteResult()

◆ ~QSQLiteResult()

Member Function Documentation

◆ detachFromResultSet()

◆ exec()

◆ execBatch()

◆ gotoNext()

◆ handle()

◆ lastInsertId()

◆ numRowsAffected()

◆ prepare()

◆ record()

◆ reset()

◆ size()

◆ virtual_hook()

Friends And Related Symbol Documentation

◆ QSQLiteDriver