#include <qsql_sqlite2.h>

Inheritance diagram for QSQLite2Result:

Public Functions
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. More...

	QSQLite2Result (const QSQLite2Driver *db)

	~QSQLite2Result ()

Public Functions inherited from QSqlCachedResult
virtual	~QSqlCachedResult ()

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

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

int	numRowsAffected ()
	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. More...

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

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

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

void	virtual_hook (int id, void *data)

Protected Functions inherited from QSqlCachedResult
ValueCache &	cache ()

void	cleanup ()

void	clearValues ()

int	colCount () const

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

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

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

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

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

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

void	init (int colCount)

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

	QSqlCachedResult (const QSqlDriver *db)

void	virtual_hook (int id, void *data)

Protected Functions inherited from QSqlResult
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). More...

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

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

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). More...

virtual void	bindValue (const QString &placeholder, const QVariant &val, QSql::ParamType type)
	Binds the value val of parameter type paramType to the placeholder name in the current record (row). More...

QSql::ParamType	bindValueType (const QString &placeholder) const
	Returns the parameter type for the value bound with the given placeholder name. More...

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

QVariant	boundValue (const QString &placeholder) const
	Returns the value bound by the given placeholder name in the current record (row). More...

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

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

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

QVector< QVariant > &	boundValues () const
	Returns a vector of the result's bound values for the current record (row). More...

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

void	detachFromResultSet ()

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

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

bool	execBatch (bool arrayBind=false)
	Executes a prepared query in batch mode if the driver supports it, otherwise emulates a batch execution using bindValue() and exec(). More...

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

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. More...

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

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

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

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. More...

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

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

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

bool	nextResult ()

QSql::NumericalPrecisionPolicy	numericalPrecisionPolicy () const

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. More...

	QSqlResult (const QSqlDriver *db)
	Creates a QSqlResult using database driver db. More...

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

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

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

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

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

void	setNumericalPrecisionPolicy (QSql::NumericalPrecisionPolicy policy)

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

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. More...

Properties
QSQLite2ResultPrivate *	d

Friends
class	QSQLite2Driver

class	QSQLite2ResultPrivate

Additional Inherited Members
Public Types inherited from QSqlCachedResult
typedef QVector< 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 { BatchOperation, DetachFromResultSet, SetNumericalPrecision, NextResult }

Detailed Description

Definition at line 65 of file qsql_sqlite2.h.

Constructors and Destructors

◆ QSQLite2Result()

QSQLite2Result::QSQLite2Result ( const QSQLite2Driver * db )

explicit

Definition at line 250 of file qsql_sqlite2.cpp.

 : QSqlCachedResult(db)
 {
     d = new QSQLite2ResultPrivate(this);
     d->access = db->d->access;
     d->utf8 = db->d->utf8;
 }

◆ ~QSQLite2Result()

QSQLite2Result::~QSQLite2Result ( )

Definition at line 258 of file qsql_sqlite2.cpp.

 {
     d->cleanup();
     delete d;
 }

Functions

◆ gotoNext()

bool QSQLite2Result::gotoNext	(	QSqlCachedResult::ValueCache &	row,
		int	idx
	)

protectedvirtual

Implements QSqlCachedResult.

Definition at line 321 of file qsql_sqlite2.cpp.

 {
     return d->fetchNext(row, idx, false);
 }

◆ handle()

QVariant QSQLite2Result::handle ( ) const

virtual

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.

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:

QSqlQuery query = ...
QVariant v = query.result()->handle();
if (v.isValid() && qstrcmp(v.typeName(), "sqlite3_stmt*")) {
    // v.data() returns a pointer to the handle
    sqlite3_stmt *handle = *static_cast<sqlite3_stmt **>(v.data());
    if (handle != 0) { // check that it is not NULL
        ...
    }
}

This snippet returns the handle for PostgreSQL or MySQL:

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

See also: QSqlDriver::handle()

Reimplemented from QSqlResult.

Definition at line 343 of file qsql_sqlite2.cpp.

Referenced by QSQLite2Driver::open().

 {
     return QVariant::fromValue(d->currentMachine);
 }

◆ numRowsAffected()

int QSQLite2Result::numRowsAffected ( )

protectedvirtual

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 331 of file qsql_sqlite2.cpp.

 {
     return sqlite_changes(d->access);
 }

◆ record()

QSqlRecord QSQLite2Result::record ( ) const

protectedvirtual

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 336 of file qsql_sqlite2.cpp.

Referenced by QSQLite2Driver::open().

 {
     if (!isActive() || !isSelect())
         return QSqlRecord();
     return d->rInf;
 }

◆ reset()

bool QSQLite2Result::reset ( const QString & query )

protectedvirtual

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 278 of file qsql_sqlite2.cpp.

 {
     // this is where we build a query.
     if (!driver())
         return false;
     if (!driver()-> isOpen() || driver()->isOpenError())
         return false;
 
     d->cleanup();
 
     // Um, ok.  callback based so.... pass private static function for this.
     setSelect(false);
     char *err = 0;
     int res = sqlite_compile(d->access,
                                 d->utf8 ? query.toUtf8().constData()
                                         : query.toAscii().constData(),
                                 &(d->currentTail),
                                 &(d->currentMachine),
                                 &err);
     if (res != SQLITE_OK || err) {
         setLastError(QSqlError(QCoreApplication::translate("QSQLite2Result",
                      "Unable to execute statement"), QString::fromAscii(err),
                      QSqlError::StatementError, res));
         sqlite_freemem(err);
     }
     //if (*d->currentTail != '\000' then there is more sql to eval
     if (!d->currentMachine) {
         setActive(false);
         return false;
     }
     // we have to fetch one row to find out about
     // the structure of the result set
     d->skippedStatus = d->fetchNext(d->firstRow, 0, true);
     if (lastError().isValid()) {
         setSelect(false);
         setActive(false);
         return false;
     }
     setSelect(!d->rInf.isEmpty());
     setActive(true);
     return true;
 }

◆ size()

int QSQLite2Result::size ( )

protectedvirtual

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 326 of file qsql_sqlite2.cpp.

 {
     return -1;
 }

◆ virtual_hook()

void QSQLite2Result::virtual_hook	(	int	id,
		void *	data
	)

protectedvirtual

Warning: This function is not part of the public interface.

Reimplemented from QSqlResult.

Definition at line 264 of file qsql_sqlite2.cpp.

 {
     switch (id) {
     case QSqlResult::DetachFromResultSet:
         d->finalize();
         break;
     default:
         QSqlCachedResult::virtual_hook(id, data);
     }
 }