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< td align = "right" valign = "center" > < img src = "logo32.png" align = "right" width = "64" height = "32" border = "0" > < / td > < / tr > < / table > < h1 align = center > TQSqlRecord Class Reference< br > < small > [< a href = "sql.html" > sql module< / a > ]< / small > < / h1 >
< p > The TQSqlRecord class encapsulates a database record, i.e. a
set of database fields.
< a href = "#details" > More...< / a >
< p > < tt > #include < < a href = "tqsqlrecord-h.html" > tqsqlrecord.h< / a > > < / tt >
< p > Inherited by < a href = "tqsqlcursor.html" > TQSqlCursor< / a > and < a href = "tqsqlindex.html" > TQSqlIndex< / a > .
< p > < a href = "tqsqlrecord-members.html" > List of all member functions.< / a >
< h2 > Public Members< / h2 >
< ul >
< li class = fn > < a href = "#TQSqlRecord" > < b > TQSqlRecord< / b > < / a > ()< / li >
< li class = fn > < a href = "#TQSqlRecord-2" > < b > TQSqlRecord< / b > < / a > ( const TQSqlRecord & other )< / li >
< li class = fn > TQSqlRecord & < a href = "#operator-eq" > < b > operator=< / b > < / a > ( const TQSqlRecord & other )< / li >
< li class = fn > virtual < a href = "#~TQSqlRecord" > < b > ~TQSqlRecord< / b > < / a > ()< / li >
< li class = fn > virtual TQVariant < a href = "#value" > < b > value< / b > < / a > ( int i ) const< / li >
< li class = fn > virtual TQVariant < a href = "#value-2" > < b > value< / b > < / a > ( const TQString & name ) const< / li >
< li class = fn > virtual void < a href = "#setValue" > < b > setValue< / b > < / a > ( int i, const TQVariant & val )< / li >
< li class = fn > virtual void < a href = "#setValue-2" > < b > setValue< / b > < / a > ( const TQString & name, const TQVariant & val )< / li >
< li class = fn > bool < a href = "#isGenerated-2" > < b > isGenerated< / b > < / a > ( int i ) const< / li >
< li class = fn > bool < a href = "#isGenerated" > < b > isGenerated< / b > < / a > ( const TQString & name ) const< / li >
< li class = fn > virtual void < a href = "#setGenerated" > < b > setGenerated< / b > < / a > ( const TQString & name, bool generated )< / li >
< li class = fn > virtual void < a href = "#setGenerated-2" > < b > setGenerated< / b > < / a > ( int i, bool generated )< / li >
< li class = fn > virtual void < a href = "#setNull" > < b > setNull< / b > < / a > ( int i )< / li >
< li class = fn > virtual void < a href = "#setNull-2" > < b > setNull< / b > < / a > ( const TQString & name )< / li >
< li class = fn > bool < a href = "#isNull-4" > < b > isNull< / b > < / a > ( int i ) const< / li >
< li class = fn > bool < a href = "#isNull" > < b > isNull< / b > < / a > ( const TQString & name ) const< / li >
< li class = fn > int < a href = "#position" > < b > position< / b > < / a > ( const TQString & name ) const< / li >
< li class = fn > TQString < a href = "#fieldName" > < b > fieldName< / b > < / a > ( int i ) const< / li >
< li class = fn > TQSqlField * < a href = "#field" > < b > field< / b > < / a > ( int i )< / li >
< li class = fn > TQSqlField * < a href = "#field-2" > < b > field< / b > < / a > ( const TQString & name )< / li >
< li class = fn > const TQSqlField * < a href = "#field-3" > < b > field< / b > < / a > ( int i ) const< / li >
< li class = fn > const TQSqlField * < a href = "#field-4" > < b > field< / b > < / a > ( const TQString & name ) const< / li >
< li class = fn > virtual void < a href = "#append" > < b > append< / b > < / a > ( const TQSqlField & field )< / li >
< li class = fn > virtual void < a href = "#insert" > < b > insert< / b > < / a > ( int pos, const TQSqlField & field )< / li >
< li class = fn > virtual void < a href = "#remove" > < b > remove< / b > < / a > ( int pos )< / li >
< li class = fn > bool < a href = "#isEmpty" > < b > isEmpty< / b > < / a > () const< / li >
< li class = fn > bool < a href = "#contains" > < b > contains< / b > < / a > ( const TQString & name ) const< / li >
< li class = fn > virtual void < a href = "#clear" > < b > clear< / b > < / a > ()< / li >
< li class = fn > virtual void < a href = "#clearValues" > < b > clearValues< / b > < / a > ( bool nullify = FALSE )< / li >
< li class = fn > uint < a href = "#count" > < b > count< / b > < / a > () const< / li >
< li class = fn > virtual TQString < a href = "#toString" > < b > toString< / b > < / a > ( const TQString & prefix = TQString::null, const TQString & sep = "," ) const< / li >
< li class = fn > virtual TQStringList < a href = "#toStringList" > < b > toStringList< / b > < / a > ( const TQString & prefix = TQString::null ) const< / li >
< / ul >
< hr > < a name = "details" > < / a > < h2 > Detailed Description< / h2 >
The TQSqlRecord class encapsulates a database record, i.e. a
set of database fields.
< p >
< p > The TQSqlRecord class encapsulates the functionality and
characteristics of a database record (usually a table or view within
the database). TQSqlRecords support adding and removing fields as
well as setting and retrieving field values.
< p > TQSqlRecord is < a href = "shclass.html#implicitly-shared" > implicitly shared< / a > . This means you can make copies of
the record in time O(1). If multiple TQSqlRecord instances share
the same data and one is modifying the record's data then this
modifying instance makes a copy and modifies its private copy -
thus it does not affect other instances.
< p > < p > See also < a href = "tqsqlrecordinfo.html" > TQSqlRecordInfo< / a > and < a href = "database.html" > Database Classes< / a > .
< hr > < h2 > Member Function Documentation< / h2 >
< h3 class = fn > < a name = "TQSqlRecord" > < / a > TQSqlRecord::TQSqlRecord ()
< / h3 >
Constructs an empty record.
< h3 class = fn > < a name = "TQSqlRecord-2" > < / a > TQSqlRecord::TQSqlRecord ( const < a href = "tqsqlrecord.html" > TQSqlRecord< / a > & other )
< / h3 >
Constructs a copy of < em > other< / em > .
< h3 class = fn > < a name = "~TQSqlRecord" > < / a > TQSqlRecord::~TQSqlRecord ()< tt > [virtual]< / tt >
< / h3 >
Destroys the object and frees any allocated resources.
< h3 class = fn > void < a name = "append" > < / a > TQSqlRecord::append ( const < a href = "tqsqlfield.html" > TQSqlField< / a > & field )< tt > [virtual]< / tt >
< / h3 >
Append a copy of field < em > field< / em > to the end of the record.
< p > Reimplemented in < a href = "tqsqlindex.html#append" > TQSqlIndex< / a > .
< h3 class = fn > void < a name = "clear" > < / a > TQSqlRecord::clear ()< tt > [virtual]< / tt >
< / h3 >
Removes all the record's fields.
< p > < p > See also < a href = "#clearValues" > clearValues< / a > ().
< p > Reimplemented in < a href = "tqsqlcursor.html#clear" > TQSqlCursor< / a > .
< h3 class = fn > void < a name = "clearValues" > < / a > TQSqlRecord::clearValues ( bool nullify = FALSE )< tt > [virtual]< / tt >
< / h3 >
Clears the value of all fields in the record. If < em > nullify< / em > is
TRUE, (the default is FALSE), each field is set to NULL.
< h3 class = fn > bool < a name = "contains" > < / a > TQSqlRecord::contains ( const < a href = "tqstring.html" > TQString< / a > & name ) const
< / h3 >
Returns TRUE if there is a field in the record called < em > name< / em > ;
otherwise returns FALSE.
< h3 class = fn > uint < a name = "count" > < / a > TQSqlRecord::count () const
< / h3 >
Returns the number of fields in the record.
< h3 class = fn > < a href = "tqsqlfield.html" > TQSqlField< / a > * < a name = "field" > < / a > TQSqlRecord::field ( int i )
< / h3 >
Returns the field at position < em > i< / em > within the record, or 0 if it
cannot be found.
< h3 class = fn > < a href = "tqsqlfield.html" > TQSqlField< / a > * < a name = "field-2" > < / a > TQSqlRecord::field ( const < a href = "tqstring.html" > TQString< / a > & name )
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Returns the field called < em > name< / em > within the record, or 0 if it
cannot be found. Field names are not case-sensitive.
< h3 class = fn > const < a href = "tqsqlfield.html" > TQSqlField< / a > * < a name = "field-3" > < / a > TQSqlRecord::field ( int i ) const
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p >
< h3 class = fn > const < a href = "tqsqlfield.html" > TQSqlField< / a > * < a name = "field-4" > < / a > TQSqlRecord::field ( const < a href = "tqstring.html" > TQString< / a > & name ) const
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Returns the field called < em > name< / em > within the record, or 0 if it
cannot be found. Field names are not case-sensitive.
< h3 class = fn > < a href = "tqstring.html" > TQString< / a > < a name = "fieldName" > < / a > TQSqlRecord::fieldName ( int i ) const
< / h3 >
Returns the name of the field at position < em > i< / em > . If the field does
not exist, < a href = "tqstring.html#TQString-null" > TQString::null< / a > is returned.
< h3 class = fn > void < a name = "insert" > < / a > TQSqlRecord::insert ( int pos, const < a href = "tqsqlfield.html" > TQSqlField< / a > & field )< tt > [virtual]< / tt >
< / h3 >
Insert a copy of < em > field< / em > at position < em > pos< / em > . If a field already
exists at < em > pos< / em > , it is removed.
< h3 class = fn > bool < a name = "isEmpty" > < / a > TQSqlRecord::isEmpty () const
< / h3 >
Returns TRUE if there are no fields in the record; otherwise
returns FALSE.
< h3 class = fn > bool < a name = "isGenerated" > < / a > TQSqlRecord::isGenerated ( const < a href = "tqstring.html" > TQString< / a > & name ) const
< / h3 >
Returns TRUE if the record has a field called < em > name< / em > and this
field is to be generated (the default); otherwise returns FALSE.
< p > < p > See also < a href = "#setGenerated" > setGenerated< / a > ().
< h3 class = fn > bool < a name = "isGenerated-2" > < / a > TQSqlRecord::isGenerated ( int i ) const
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Returns TRUE if the record has a field at position < em > i< / em > and this
field is to be generated (the default); otherwise returns FALSE.
< p > < p > See also < a href = "#setGenerated" > setGenerated< / a > ().
< h3 class = fn > bool < a name = "isNull" > < / a > TQSqlRecord::isNull ( const < a href = "tqstring.html" > TQString< / a > & name ) const
< / h3 >
Returns TRUE if the field called < em > name< / em > is NULL or if there is no
field called < em > name< / em > ; otherwise returns FALSE.
< p > < p > See also < a href = "#position" > position< / a > ().
< h3 class = fn > bool < a name = "isNull-4" > < / a > TQSqlRecord::isNull ( int i ) const
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Returns TRUE if the field < em > i< / em > is NULL or if there is no field at
position < em > i< / em > ; otherwise returns FALSE.
< p > < p > See also < a href = "#fieldName" > fieldName< / a > ().
< h3 class = fn > < a href = "tqsqlrecord.html" > TQSqlRecord< / a > & < a name = "operator-eq" > < / a > TQSqlRecord::operator= ( const < a href = "tqsqlrecord.html" > TQSqlRecord< / a > & other )
< / h3 >
Sets the record equal to < em > other< / em > .
< h3 class = fn > int < a name = "position" > < / a > TQSqlRecord::position ( const < a href = "tqstring.html" > TQString< / a > & name ) const
< / h3 >
Returns the position of the field called < em > name< / em > within the
record, or -1 if it cannot be found. Field names are not
case-sensitive. If more than one field matches, the first one is
returned.
< h3 class = fn > void < a name = "remove" > < / a > TQSqlRecord::remove ( int pos )< tt > [virtual]< / tt >
< / h3 >
Removes the field at < em > pos< / em > . If < em > pos< / em > does not exist, nothing
happens.
< p > Reimplemented in < a href = "tqsqlcursor.html#remove" > TQSqlCursor< / a > .
< h3 class = fn > void < a name = "setGenerated" > < / a > TQSqlRecord::setGenerated ( const < a href = "tqstring.html" > TQString< / a > & name, bool generated )< tt > [virtual]< / tt >
< / h3 >
Sets the generated flag for the field called < em > name< / em > to < em > generated< / em > . If the field does not exist, nothing happens. Only
fields that have < em > generated< / em > set to TRUE are included in the SQL
that is generated, e.g. by < a href = "tqsqlcursor.html" > TQSqlCursor< / a > .
< p > < p > See also < a href = "#isGenerated" > isGenerated< / a > ().
< p > Reimplemented in < a href = "tqsqlcursor.html#setGenerated" > TQSqlCursor< / a > .
< h3 class = fn > void < a name = "setGenerated-2" > < / a > TQSqlRecord::setGenerated ( int i, bool generated )< tt > [virtual]< / tt >
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Sets the generated flag for the field < em > i< / em > to < em > generated< / em > .
< p > < p > See also < a href = "#isGenerated" > isGenerated< / a > ().
< p > Reimplemented in < a href = "tqsqlcursor.html#setGenerated-2" > TQSqlCursor< / a > .
< h3 class = fn > void < a name = "setNull" > < / a > TQSqlRecord::setNull ( int i )< tt > [virtual]< / tt >
< / h3 >
Sets the value of field < em > i< / em > to NULL. If the field does not exist,
nothing happens.
< h3 class = fn > void < a name = "setNull-2" > < / a > TQSqlRecord::setNull ( const < a href = "tqstring.html" > TQString< / a > & name )< tt > [virtual]< / tt >
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Sets the value of the field called < em > name< / em > to NULL. If the field
does not exist, nothing happens.
< h3 class = fn > void < a name = "setValue" > < / a > TQSqlRecord::setValue ( int i, const < a href = "ntqvariant.html" > TQVariant< / a > & val )< tt > [virtual]< / tt >
< / h3 >
Sets the value of the field at position < em > i< / em > to < em > val< / em > . If the
field does not exist, nothing happens.
< p > Examples: < a href = "sql.html#x2196" > sql/overview/insert/main.cpp< / a > , < a href = "tqsqlcursor.html#x2448" > sql/overview/insert2/main.cpp< / a > , < a href = "sql.html#x2270" > sql/overview/subclass5/main.cpp< / a > , < a href = "sql.html#x2203" > sql/overview/update/main.cpp< / a > , and < a href = "sqltable-example.html#x2464" > sql/sqltable/main.cpp< / a > .
< h3 class = fn > void < a name = "setValue-2" > < / a > TQSqlRecord::setValue ( const < a href = "tqstring.html" > TQString< / a > & name, const < a href = "ntqvariant.html" > TQVariant< / a > & val )< tt > [virtual]< / tt >
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Sets the value of the field called < em > name< / em > to < em > val< / em > . If the field
does not exist, nothing happens.
< h3 class = fn > < a href = "tqstring.html" > TQString< / a > < a name = "toString" > < / a > TQSqlRecord::toString ( const < a href = "tqstring.html" > TQString< / a > & prefix = TQString::null, const < a href = "tqstring.html" > TQString< / a > & sep = "," ) const< tt > [virtual]< / tt >
< / h3 >
Returns a list of all the record's field names as a string
separated by < em > sep< / em > .
< p > Note that fields which are not generated are < em > not< / em > included (see
< a href = "#isGenerated" > isGenerated< / a > ()). The returned string is suitable, for example, for
generating SQL SELECT statements. If a < em > prefix< / em > is specified,
e.g. a table name, all fields are prefixed in the form:
< p > "< em > prefix< / em > .< fieldname> "
< h3 class = fn > < a href = "tqstringlist.html" > TQStringList< / a > < a name = "toStringList" > < / a > TQSqlRecord::toStringList ( const < a href = "tqstring.html" > TQString< / a > & prefix = TQString::null ) const< tt > [virtual]< / tt >
< / h3 >
Returns a list of all the record's field names, each having the
prefix < em > prefix< / em > .
< p > Note that fields which have generated set to FALSE are < em > not< / em >
included. (See < a href = "#isGenerated" > isGenerated< / a > ()). If < em > prefix< / em > is supplied, e.g.
a table name, all fields are prefixed in the form:
< p > "< em > prefix< / em > .< fieldname> "
< h3 class = fn > < a href = "ntqvariant.html" > TQVariant< / a > < a name = "value" > < / a > TQSqlRecord::value ( int i ) const< tt > [virtual]< / tt >
< / h3 >
Returns the value of the field located at position < em > i< / em > in the
record. If field < em > i< / em > does not exist the resultant behaviour is
undefined.
< p > This function should be used with < a href = "tqsqlquery.html" > TQSqlQuery< / a > s. When working
with a < a href = "tqsqlcursor.html" > TQSqlCursor< / a > the < a href = "tqsqlquery.html#value" > value(const
TQString& )< / a > overload which uses field names is more
appropriate.
< p > Example: < a href = "sql.html#x2204" > sql/overview/update/main.cpp< / a > .
< h3 class = fn > < a href = "ntqvariant.html" > TQVariant< / a > < a name = "value-2" > < / a > TQSqlRecord::value ( const < a href = "tqstring.html" > TQString< / a > & name ) const< tt > [virtual]< / tt >
< / h3 >
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
< p > Returns the value of the field called < em > name< / em > in the record. If
field < em > name< / em > does not exist the resultant behaviour is undefined.
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