Inheritance diagram for QMimerSQLResult:

Collaboration diagram for QMimerSQLResult:

Public Member Functions
	QMimerSQLResult (const QMimerSQLDriver *db)

virtual	~QMimerSQLResult () override

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.

Static Public Attributes
static constexpr int	genericError = -1

static constexpr int	lobChunkMaxSizeSet = 1048500

static constexpr int	lobChunkMaxSizeFetch = 65536

static constexpr int	maxStackStringSize = 200

static constexpr int	maxTimeStringSize = 18

static constexpr int	maxDateStringSize = 10

static constexpr int	maxTimestampStringSize = 29

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

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.

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

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

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

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.

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=false) override

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

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

Additional Inherited Members
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 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.

Protected Attributes inherited from QSqlResult
QSqlResultPrivate *	d_ptr

Detailed Description

Definition at line 54 of file qsql_mimer.cpp.

Constructor & Destructor Documentation

◆ QMimerSQLResult()

QMimerSQLResult::QMimerSQLResult ( const QMimerSQLDriver * db )

Definition at line 191 of file qsql_mimer.cpp.

References d, db, and QSqlDriver::PreparedQueries.

◆ ~QMimerSQLResult()

QMimerSQLResult::~QMimerSQLResult ( )

overridevirtual

Definition at line 198 of file qsql_mimer.cpp.

Member Function Documentation

◆ data()

QVariant QMimerSQLResult::data ( int index )

overrideprivatevirtual

Returns the data for field index in the current row as a QVariant.

This function is only called if the result is in an active state and is positioned on a valid record and index is non-negative. Derived classes must reimplement this function and return the value of field index, or QVariant() if it cannot be determined.

Implements QSqlResult.

Definition at line 594 of file qsql_mimer.cpp.

References QByteArray::append(), QString::append(), arg, Binary, Blob, Boolean, Clob, d, QByteArray::data(), QVarLengthArray< T, Prealloc >::data(), Date, Double, Float, QByteArray::fromRawData(), QUuid::fromRfc4122(), QString::fromWCharArray(), genericError, QSql::HighPrecision, i, Int, QString::left(), lobChunkMaxSizeFetch, Long, QSql::LowPrecisionDouble, QSql::LowPrecisionInt32, QSql::LowPrecisionInt64, maxDateStringSize, maxStackStringSize, maxTimestampStringSize, maxTimeStringSize, mimerMapColumnTypes(), msgCouldNotGet(), QString::number(), QSqlResult::numericalPrecisionPolicy(), qDecodeMSQLType(), qMakeError(), QByteArray::reserve(), QByteArray::resize(), QSqlResult::setLastError(), QString::size(), size(), QSqlError::StatementError, String, Time, Timestamp, QString::toLongLong(), QCoreApplication::translate(), Unknown, and Uuid.

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◆ exec()

bool QMimerSQLResult::exec ( )

overrideprivatevirtual

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

See also: prepare()

Reimplemented from QSqlResult.

Definition at line 959 of file qsql_mimer.cpp.

References QString::append(), arg, QSql::BeforeFirstRow, Binary, QSqlResult::bindValue(), QSqlResult::bindValueType(), Blob, Boolean, QSqlResult::boundValues(), Clob, QByteArray::constData(), d, QByteArray::data(), Date, Double, QSqlResult::driver(), QSqlResult::exec(), Float, QByteArray::fromHex(), genericError, i, QSql::In, QSql::InOut, Int, QSqlResultPrivate::isVariantNull(), lobChunkMaxSizeSet, Long, mimerMapColumnTypes(), QTime::msec(), msgCouldNotSet(), QSql::Out, pos, qMakeError(), QSqlResult::setActive(), QSqlResult::setAt(), QSqlResult::setLastError(), QSqlResult::setSelect(), QByteArray::size(), size(), QSqlError::StatementError, String, QDateTime::time(), Time, Timestamp, QCoreApplication::translate(), QByteArray::trimmed(), Unknown, Uuid, and QUuid::WithoutBraces.

Referenced by execBatch(), and reset().

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◆ execBatch()

bool QMimerSQLResult::execBatch ( bool arrayBind = false )

overrideprivatevirtual

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 1271 of file qsql_mimer.cpp.

References arg, QSqlResult::bindValueType(), QSqlResult::boundValues(), d, exec(), genericError, i, QSql::InOut, j, QSql::Out, Q_UNUSED, qMakeError(), QSqlResult::setLastError(), size(), QSqlError::StatementError, toList(), and QCoreApplication::translate().

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◆ fetch()

bool QMimerSQLResult::fetch ( int index )

overrideprivatevirtual

Positions the result to an arbitrary (zero-based) row index.

This function is only called if the result is in an active state. Derived classes must reimplement this function and position the result to the row index, and call setAt() with an appropriate value. Return true to indicate success, or false to signify failure.

See also: isActive(), fetchFirst(), fetchLast(), fetchNext(), fetchPrevious()

Implements QSqlResult.

Definition at line 466 of file qsql_mimer.cpp.

References QSqlResult::at(), d, fetchNext(), i, QSqlResult::isActive(), QSqlResult::isForwardOnly(), QSqlResult::isSelect(), qMakeError(), QSqlResult::setAt(), QSqlResult::setLastError(), QSqlError::StatementError, and QCoreApplication::translate().

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◆ fetchFirst()

bool QMimerSQLResult::fetchFirst ( )

overrideprivatevirtual

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

This function is only called if the result is in an active state. Derived classes must reimplement this function and position the result to the first record, and call setAt() with an appropriate value. Return true to indicate success, or false to signify failure.

See also: fetch(), fetchLast()

Implements QSqlResult.

Definition at line 501 of file qsql_mimer.cpp.

References d, fetchNext(), QSqlResult::isActive(), QSqlResult::isForwardOnly(), QSqlResult::isSelect(), qMakeError(), QSqlResult::setAt(), QSqlResult::setLastError(), QSqlError::StatementError, and QCoreApplication::translate().

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◆ fetchLast()

bool QMimerSQLResult::fetchLast ( )

overrideprivatevirtual

Positions the result to the last record (last row) in the result.

This function is only called if the result is in an active state. Derived classes must reimplement this function and position the result to the last record, and call setAt() with an appropriate value. Return true to indicate success, or false to signify failure.

See also: fetch(), fetchFirst()

Implements QSqlResult.

Definition at line 530 of file qsql_mimer.cpp.

References QSql::BeforeFirstRow, d, fetchNext(), QSqlResult::isActive(), QSqlResult::isForwardOnly(), QSqlResult::isSelect(), qMakeError(), QSqlResult::setAt(), QSqlResult::setLastError(), QSqlError::StatementError, and QCoreApplication::translate().

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◆ fetchNext()

bool QMimerSQLResult::fetchNext ( )

overrideprivatevirtual

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

This function is only called if the result is in an active state. The default implementation calls fetch() with the next index. Derived classes can reimplement this function and position the result to the next record in some other way, and call setAt() with an appropriate value. Return true to indicate success, or false to signify failure.

See also: fetch(), fetchPrevious()

Reimplemented from QSqlResult.

Definition at line 567 of file qsql_mimer.cpp.

References QSql::BeforeFirstRow, d, QSqlResult::isActive(), QSqlResult::isForwardOnly(), QSqlResult::isSelect(), qMakeError(), QSqlResult::setAt(), QSqlResult::setLastError(), QSqlError::StatementError, and QCoreApplication::translate().

Referenced by fetch(), fetchFirst(), and fetchLast().

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◆ handle()

QVariant QMimerSQLResult::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 427 of file qsql_mimer.cpp.

References d, and QVariant::fromValue().

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◆ isNull()

bool QMimerSQLResult::isNull ( int i )

overrideprivatevirtual

Returns true if the field at position index in the current row is null; otherwise returns false.

Implements QSqlResult.

Definition at line 853 of file qsql_mimer.cpp.

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

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◆ lastInsertId()

QVariant QMimerSQLResult::lastInsertId ( ) const

overrideprivatevirtual

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 1318 of file qsql_mimer.cpp.

References d.

◆ numRowsAffected()

int QMimerSQLResult::numRowsAffected ( )

overrideprivatevirtual

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 893 of file qsql_mimer.cpp.

References d.

◆ prepare()

bool QMimerSQLResult::prepare ( const QString & query )

overrideprivatevirtual

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 926 of file qsql_mimer.cpp.

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

Referenced by reset().

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◆ record()

QSqlRecord QMimerSQLResult::record ( ) const

overrideprivatevirtual

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 899 of file qsql_mimer.cpp.

References d, QSqlResult::driver(), QString::fromWCharArray(), i, QSqlRecord::insert(), QSqlResult::isActive(), QSqlResult::isSelect(), QSqlField::metaType(), qDecodeMSQLType(), QSqlField::setMetaType(), QSqlField::setName(), QSqlField::setSqlType(), and QSqlField::setValue().

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◆ reset()

bool QMimerSQLResult::reset ( const QString & query )

overrideprivatevirtual

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 867 of file qsql_mimer.cpp.

References exec(), and prepare().

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◆ size()

int QMimerSQLResult::size ( )

overrideprivatevirtual

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 874 of file qsql_mimer.cpp.

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

Referenced by data(), exec(), execBatch(), and size().

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Member Data Documentation

◆ genericError

constexpr int QMimerSQLResult::genericError = -1

staticconstexpr

Definition at line 61 of file qsql_mimer.cpp.

Referenced by data(), exec(), and execBatch().

◆ lobChunkMaxSizeFetch

constexpr int QMimerSQLResult::lobChunkMaxSizeFetch = 65536

staticconstexpr

Definition at line 63 of file qsql_mimer.cpp.

Referenced by data().

◆ lobChunkMaxSizeSet

constexpr int QMimerSQLResult::lobChunkMaxSizeSet = 1048500

staticconstexpr

Definition at line 62 of file qsql_mimer.cpp.

Referenced by exec().

◆ maxDateStringSize

constexpr int QMimerSQLResult::maxDateStringSize = 10

staticconstexpr

Definition at line 66 of file qsql_mimer.cpp.

Referenced by data().

◆ maxStackStringSize

constexpr int QMimerSQLResult::maxStackStringSize = 200

staticconstexpr

Definition at line 64 of file qsql_mimer.cpp.

Referenced by data().

◆ maxTimestampStringSize

constexpr int QMimerSQLResult::maxTimestampStringSize = 29

staticconstexpr

Definition at line 67 of file qsql_mimer.cpp.

Referenced by data().

◆ maxTimeStringSize

constexpr int QMimerSQLResult::maxTimeStringSize = 18

staticconstexpr

Definition at line 65 of file qsql_mimer.cpp.

Referenced by data().

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

qtbase/src/plugins/sqldrivers/mimer/qsql_mimer.cpp

Public Member Functions

Static Public Attributes

Private Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QMimerSQLResult()

◆ ~QMimerSQLResult()

Member Function Documentation

◆ data()

◆ exec()

◆ execBatch()

◆ fetch()

◆ fetchFirst()

◆ fetchLast()

◆ fetchNext()

◆ handle()

◆ isNull()

◆ lastInsertId()

◆ numRowsAffected()

◆ prepare()

◆ record()

◆ reset()

◆ size()

Member Data Documentation

◆ genericError

◆ lobChunkMaxSizeFetch

◆ lobChunkMaxSizeSet

◆ maxDateStringSize

◆ maxStackStringSize

◆ maxTimestampStringSize

◆ maxTimeStringSize