QIBaseResult Class Reference

Inheritance diagram for QIBaseResult:

Collaboration diagram for QIBaseResult:

Public Member Functions
	QIBaseResult (const QIBaseDriver *db)
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	exec () override
	Executes the query, returning true if successful; otherwise returns false.
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.

Protected Member Functions
bool	gotoNext (QSqlCachedResult::ValueCache &row, int rowIdx) override
bool	reset (const QString &query) override
	Sets the result to use the SQL statement query for subsequent data retrieval.
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.
QSqlRecord	record () const override
	Returns the current record if the query is active; otherwise returns an empty QSqlRecord.
template<typename T >
QVariant	applyScale (T val, int scale) const
Protected Member Functions inherited from QSqlCachedResult
	QSqlCachedResult (QSqlCachedResultPrivate &d)
void	init (int colCount)
void	cleanup ()
void	clearValues ()
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	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	lastInsertId () const
	Returns the object ID of the most recent inserted row if the database supports it.
virtual bool	execBatch (bool arrayBind=false)
QSql::NumericalPrecisionPolicy	numericalPrecisionPolicy () const
void	setPositionalBindingEnabled (bool enable)
bool	isPositionalBindingEnabled () const
virtual bool	nextResult ()
void	resetBindCount ()
	Resets the number of bind parameters.

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 392 of file qsql_ibase.cpp.

Constructor & Destructor Documentation

QIBaseResult()

QIBaseResult::QIBaseResult ( const QIBaseDriver * db )

explicit

Definition at line 978 of file qsql_ibase.cpp.

Member Function Documentation

applyScale()

template<typename T >

QVariant QIBaseResult::applyScale ( T val, int scale ) const

inlineprotected

Definition at line 411 of file qsql_ibase.cpp.

References QSql::HighPrecision, QSql::LowPrecisionDouble, QSql::LowPrecisionInt32, QSql::LowPrecisionInt64, number, QString::number(), QSqlResult::numericalPrecisionPolicy(), qAbs(), and QString::size().

Referenced by gotoNext().

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exec()

bool QIBaseResult::exec ( )

overridevirtual

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

See also

prepare()

Reimplemented from QSqlResult.

Definition at line 1059 of file qsql_ibase.cpp.

References QSql::BeforeFirstRow, QSqlResult::boundValues(), QSqlCachedResult::cleanup(), QSqlCachedResult::colCount(), d, delDA(), QSqlResult::driver(), FBVERSION, getIBaseError(), QSqlCachedResult::init(), QSqlResult::isSelect(), QSqlResultPrivate::isVariantNull(), QString::number(), ok, qCWarning, qFillBufferWithString(), QT_TRANSLATE_NOOP, QSqlResult::setActive(), QSqlResult::setAt(), QSqlResult::setLastError(), toDate(), toTime(), toTimeStamp(), QCoreApplication::translate(), and QSqlError::UnknownError.

Referenced by reset().

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gotoNext()

bool QIBaseResult::gotoNext ( QSqlCachedResult::ValueCache & row, int rowIdx )

overrideprotectedvirtual

Implements QSqlCachedResult.

Definition at line 1215 of file qsql_ibase.cpp.

References QSql::AfterLastRow, applyScale(), QVariant::convert(), d, FBVERSION, fromDate(), fromTime(), fromTimeStamp(), QString::fromUtf8(), QSql::HighPrecision, i, QSql::LowPrecisionDouble, QSql::LowPrecisionInt32, QSql::LowPrecisionInt64, QSqlResult::numericalPrecisionPolicy(), Q_ASSERT, qCWarning, qIBaseTypeName2(), QT_TRANSLATE_NOOP, QSqlResult::setAt(), and QSqlError::StatementError.

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handle()

QVariant QIBaseResult::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 1489 of file qsql_ibase.cpp.

References d.

numRowsAffected()

int QIBaseResult::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 1394 of file qsql_ibase.cpp.

References d, qCWarning, QT_TRANSLATE_NOOP, and QSqlError::StatementError.

prepare()

bool QIBaseResult::prepare ( const QString & query )

overridevirtual

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 983 of file qsql_ibase.cpp.

References QSql::BeforeFirstRow, createDA(), d, QSqlResult::driver(), enlargeDA(), FBVERSION, initDA(), QSqlResult::isSelect(), qCWarning, QT_TRANSLATE_NOOP, QSqlResult::setActive(), QSqlResult::setAt(), QSqlResult::setSelect(), and QSqlError::StatementError.

Referenced by reset().

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record()

QSqlRecord QIBaseResult::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 1449 of file qsql_ibase.cpp.

References QSqlRecord::append(), d, QSqlResult::driver(), QString::fromLatin1(), i, QSqlResult::isActive(), QSqlField::Optional, qAbs(), qIBaseTypeName2(), and QSqlField::Required.

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reset()

bool QIBaseResult::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 1208 of file qsql_ibase.cpp.

References exec(), and prepare().

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size()

int QIBaseResult::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()

FIXME

Implements QSqlResult.

Definition at line 1343 of file qsql_ibase.cpp.

References d, i, QSqlResult::isActive(), QSqlResult::isSelect(), QString::number(), and qDebug.

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

• qtbase/src/plugins/sqldrivers/ibase/qsql_ibase.cpp (922ec9093d87ac8f21b0eefebb9c42d03e9dc820)