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295 lines
17 KiB
295 lines
17 KiB
13 years ago
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/sql/qsqlrecord.cpp:151 -->
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<title>TQSqlRecord Class</title>
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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>
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<p>The TQSqlRecord class encapsulates a database record, i.e. a
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set of database fields.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qsqlrecord-h.html">qsqlrecord.h</a>></tt>
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<p>Inherited by <a href="qsqlcursor.html">TQSqlCursor</a> and <a href="qsqlindex.html">TQSqlIndex</a>.
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<p><a href="qsqlrecord-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#TQSqlRecord"><b>TQSqlRecord</b></a> ()</li>
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<li class=fn><a href="#TQSqlRecord-2"><b>TQSqlRecord</b></a> ( const TQSqlRecord & other )</li>
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<li class=fn>TQSqlRecord & <a href="#operator-eq"><b>operator=</b></a> ( const TQSqlRecord & other )</li>
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<li class=fn>virtual <a href="#~TQSqlRecord"><b>~TQSqlRecord</b></a> ()</li>
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<li class=fn>virtual TQVariant <a href="#value"><b>value</b></a> ( int i ) const</li>
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<li class=fn>virtual TQVariant <a href="#value-2"><b>value</b></a> ( const TQString & name ) const</li>
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<li class=fn>virtual void <a href="#setValue"><b>setValue</b></a> ( int i, const TQVariant & val )</li>
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<li class=fn>virtual void <a href="#setValue-2"><b>setValue</b></a> ( const TQString & name, const TQVariant & val )</li>
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<li class=fn>bool <a href="#isGenerated-2"><b>isGenerated</b></a> ( int i ) const</li>
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<li class=fn>bool <a href="#isGenerated"><b>isGenerated</b></a> ( const TQString & name ) const</li>
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<li class=fn>virtual void <a href="#setGenerated"><b>setGenerated</b></a> ( const TQString & name, bool generated )</li>
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<li class=fn>virtual void <a href="#setGenerated-2"><b>setGenerated</b></a> ( int i, bool generated )</li>
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<li class=fn>virtual void <a href="#setNull"><b>setNull</b></a> ( int i )</li>
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<li class=fn>virtual void <a href="#setNull-2"><b>setNull</b></a> ( const TQString & name )</li>
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<li class=fn>bool <a href="#isNull-4"><b>isNull</b></a> ( int i ) const</li>
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<li class=fn>bool <a href="#isNull"><b>isNull</b></a> ( const TQString & name ) const</li>
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<li class=fn>int <a href="#position"><b>position</b></a> ( const TQString & name ) const</li>
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<li class=fn>TQString <a href="#fieldName"><b>fieldName</b></a> ( int i ) const</li>
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<li class=fn>TQSqlField * <a href="#field"><b>field</b></a> ( int i )</li>
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<li class=fn>TQSqlField * <a href="#field-2"><b>field</b></a> ( const TQString & name )</li>
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<li class=fn>const TQSqlField * <a href="#field-3"><b>field</b></a> ( int i ) const</li>
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<li class=fn>const TQSqlField * <a href="#field-4"><b>field</b></a> ( const TQString & name ) const</li>
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<li class=fn>virtual void <a href="#append"><b>append</b></a> ( const TQSqlField & field )</li>
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<li class=fn>virtual void <a href="#insert"><b>insert</b></a> ( int pos, const TQSqlField & field )</li>
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<li class=fn>virtual void <a href="#remove"><b>remove</b></a> ( int pos )</li>
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<li class=fn>bool <a href="#isEmpty"><b>isEmpty</b></a> () const</li>
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<li class=fn>bool <a href="#contains"><b>contains</b></a> ( const TQString & name ) const</li>
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<li class=fn>virtual void <a href="#clear"><b>clear</b></a> ()</li>
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<li class=fn>virtual void <a href="#clearValues"><b>clearValues</b></a> ( bool nullify = FALSE )</li>
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<li class=fn>uint <a href="#count"><b>count</b></a> () const</li>
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<li class=fn>virtual TQString <a href="#toString"><b>toString</b></a> ( const TQString & prefix = TQString::null, const TQString & sep = "," ) const</li>
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<li class=fn>virtual TQStringList <a href="#toStringList"><b>toStringList</b></a> ( const TQString & prefix = TQString::null ) const</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQSqlRecord class encapsulates a database record, i.e. a
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set of database fields.
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<p>
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<p> The TQSqlRecord class encapsulates the functionality and
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characteristics of a database record (usually a table or view within
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the database). TQSqlRecords support adding and removing fields as
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well as setting and retrieving field values.
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<p> TQSqlRecord is <a href="shclass.html#implicitly-shared">implicitly shared</a>. This means you can make copies of
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the record in time O(1). If multiple TQSqlRecord instances share
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the same data and one is modifying the record's data then this
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modifying instance makes a copy and modifies its private copy -
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thus it does not affect other instances.
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<p> <p>See also <a href="qsqlrecordinfo.html">TQSqlRecordInfo</a> and <a href="database.html">Database Classes</a>.
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQSqlRecord"></a>TQSqlRecord::TQSqlRecord ()
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</h3>
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Constructs an empty record.
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<h3 class=fn><a name="TQSqlRecord-2"></a>TQSqlRecord::TQSqlRecord ( const <a href="qsqlrecord.html">TQSqlRecord</a> & other )
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</h3>
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Constructs a copy of <em>other</em>.
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<h3 class=fn><a name="~TQSqlRecord"></a>TQSqlRecord::~TQSqlRecord ()<tt> [virtual]</tt>
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</h3>
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Destroys the object and frees any allocated resources.
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<h3 class=fn>void <a name="append"></a>TQSqlRecord::append ( const <a href="qsqlfield.html">TQSqlField</a> & field )<tt> [virtual]</tt>
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</h3>
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Append a copy of field <em>field</em> to the end of the record.
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<p>Reimplemented in <a href="qsqlindex.html#append">TQSqlIndex</a>.
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<h3 class=fn>void <a name="clear"></a>TQSqlRecord::clear ()<tt> [virtual]</tt>
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</h3>
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Removes all the record's fields.
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<p> <p>See also <a href="#clearValues">clearValues</a>().
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<p>Reimplemented in <a href="qsqlcursor.html#clear">TQSqlCursor</a>.
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<h3 class=fn>void <a name="clearValues"></a>TQSqlRecord::clearValues ( bool nullify = FALSE )<tt> [virtual]</tt>
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</h3>
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Clears the value of all fields in the record. If <em>nullify</em> is
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TRUE, (the default is FALSE), each field is set to NULL.
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<h3 class=fn>bool <a name="contains"></a>TQSqlRecord::contains ( const <a href="qstring.html">TQString</a> & name ) const
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</h3>
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Returns TRUE if there is a field in the record called <em>name</em>;
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otherwise returns FALSE.
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<h3 class=fn>uint <a name="count"></a>TQSqlRecord::count () const
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</h3>
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Returns the number of fields in the record.
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<h3 class=fn><a href="qsqlfield.html">TQSqlField</a> * <a name="field"></a>TQSqlRecord::field ( int i )
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</h3>
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Returns the field at position <em>i</em> within the record, or 0 if it
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cannot be found.
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<h3 class=fn><a href="qsqlfield.html">TQSqlField</a> * <a name="field-2"></a>TQSqlRecord::field ( const <a href="qstring.html">TQString</a> & name )
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns the field called <em>name</em> within the record, or 0 if it
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cannot be found. Field names are not case-sensitive.
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<h3 class=fn>const <a href="qsqlfield.html">TQSqlField</a> * <a name="field-3"></a>TQSqlRecord::field ( int i ) const
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p>
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<h3 class=fn>const <a href="qsqlfield.html">TQSqlField</a> * <a name="field-4"></a>TQSqlRecord::field ( const <a href="qstring.html">TQString</a> & name ) const
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns the field called <em>name</em> within the record, or 0 if it
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cannot be found. Field names are not case-sensitive.
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<h3 class=fn><a href="qstring.html">TQString</a> <a name="fieldName"></a>TQSqlRecord::fieldName ( int i ) const
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</h3>
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Returns the name of the field at position <em>i</em>. If the field does
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not exist, <a href="qstring.html#TQString-null">TQString::null</a> is returned.
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<h3 class=fn>void <a name="insert"></a>TQSqlRecord::insert ( int pos, const <a href="qsqlfield.html">TQSqlField</a> & field )<tt> [virtual]</tt>
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</h3>
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Insert a copy of <em>field</em> at position <em>pos</em>. If a field already
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exists at <em>pos</em>, it is removed.
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<h3 class=fn>bool <a name="isEmpty"></a>TQSqlRecord::isEmpty () const
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</h3>
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Returns TRUE if there are no fields in the record; otherwise
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returns FALSE.
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<h3 class=fn>bool <a name="isGenerated"></a>TQSqlRecord::isGenerated ( const <a href="qstring.html">TQString</a> & name ) const
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</h3>
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Returns TRUE if the record has a field called <em>name</em> and this
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field is to be generated (the default); otherwise returns FALSE.
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<p> <p>See also <a href="#setGenerated">setGenerated</a>().
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<h3 class=fn>bool <a name="isGenerated-2"></a>TQSqlRecord::isGenerated ( int i ) const
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns TRUE if the record has a field at position <em>i</em> and this
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field is to be generated (the default); otherwise returns FALSE.
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<p> <p>See also <a href="#setGenerated">setGenerated</a>().
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<h3 class=fn>bool <a name="isNull"></a>TQSqlRecord::isNull ( const <a href="qstring.html">TQString</a> & name ) const
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</h3>
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Returns TRUE if the field called <em>name</em> is NULL or if there is no
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field called <em>name</em>; otherwise returns FALSE.
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<p> <p>See also <a href="#position">position</a>().
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<h3 class=fn>bool <a name="isNull-4"></a>TQSqlRecord::isNull ( int i ) const
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns TRUE if the field <em>i</em> is NULL or if there is no field at
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position <em>i</em>; otherwise returns FALSE.
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<p> <p>See also <a href="#fieldName">fieldName</a>().
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<h3 class=fn><a href="qsqlrecord.html">TQSqlRecord</a> & <a name="operator-eq"></a>TQSqlRecord::operator= ( const <a href="qsqlrecord.html">TQSqlRecord</a> & other )
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</h3>
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Sets the record equal to <em>other</em>.
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<h3 class=fn>int <a name="position"></a>TQSqlRecord::position ( const <a href="qstring.html">TQString</a> & name ) const
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</h3>
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Returns the position of the field called <em>name</em> within the
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record, or -1 if it cannot be found. Field names are not
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case-sensitive. If more than one field matches, the first one is
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returned.
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<h3 class=fn>void <a name="remove"></a>TQSqlRecord::remove ( int pos )<tt> [virtual]</tt>
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</h3>
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Removes the field at <em>pos</em>. If <em>pos</em> does not exist, nothing
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happens.
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<p>Reimplemented in <a href="qsqlcursor.html#remove">TQSqlCursor</a>.
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<h3 class=fn>void <a name="setGenerated"></a>TQSqlRecord::setGenerated ( const <a href="qstring.html">TQString</a> & name, bool generated )<tt> [virtual]</tt>
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</h3>
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Sets the generated flag for the field called <em>name</em> to <em>generated</em>. If the field does not exist, nothing happens. Only
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fields that have <em>generated</em> set to TRUE are included in the SQL
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that is generated, e.g. by <a href="qsqlcursor.html">TQSqlCursor</a>.
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<p> <p>See also <a href="#isGenerated">isGenerated</a>().
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<p>Reimplemented in <a href="qsqlcursor.html#setGenerated">TQSqlCursor</a>.
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<h3 class=fn>void <a name="setGenerated-2"></a>TQSqlRecord::setGenerated ( int i, bool generated )<tt> [virtual]</tt>
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Sets the generated flag for the field <em>i</em> to <em>generated</em>.
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<p> <p>See also <a href="#isGenerated">isGenerated</a>().
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<p>Reimplemented in <a href="qsqlcursor.html#setGenerated-2">TQSqlCursor</a>.
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<h3 class=fn>void <a name="setNull"></a>TQSqlRecord::setNull ( int i )<tt> [virtual]</tt>
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</h3>
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Sets the value of field <em>i</em> to NULL. If the field does not exist,
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nothing happens.
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<h3 class=fn>void <a name="setNull-2"></a>TQSqlRecord::setNull ( const <a href="qstring.html">TQString</a> & name )<tt> [virtual]</tt>
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Sets the value of the field called <em>name</em> to NULL. If the field
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does not exist, nothing happens.
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<h3 class=fn>void <a name="setValue"></a>TQSqlRecord::setValue ( int i, const <a href="qvariant.html">TQVariant</a> & val )<tt> [virtual]</tt>
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</h3>
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Sets the value of the field at position <em>i</em> to <em>val</em>. If the
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field does not exist, nothing happens.
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<p>Examples: <a href="sql.html#x2196">sql/overview/insert/main.cpp</a>, <a href="qsqlcursor.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>.
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<h3 class=fn>void <a name="setValue-2"></a>TQSqlRecord::setValue ( const <a href="qstring.html">TQString</a> & name, const <a href="qvariant.html">TQVariant</a> & val )<tt> [virtual]</tt>
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Sets the value of the field called <em>name</em> to <em>val</em>. If the field
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does not exist, nothing happens.
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<h3 class=fn><a href="qstring.html">TQString</a> <a name="toString"></a>TQSqlRecord::toString ( const <a href="qstring.html">TQString</a> & prefix = TQString::null, const <a href="qstring.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="qstringlist.html">TQStringList</a> <a name="toStringList"></a>TQSqlRecord::toStringList ( const <a href="qstring.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="qvariant.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="qsqlquery.html">TQSqlQuery</a>s. When working
|
||
|
|
with a <a href="qsqlcursor.html">TQSqlCursor</a> the <a href="qsqlquery.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="qvariant.html">TQVariant</a> <a name="value-2"></a>TQSqlRecord::value ( const <a href="qstring.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.
|
||
|
|
|
||
|
|
<!-- eof -->
|
||
|
|
<hr><p>
|
||
|
|
This file is part of the <a href="index.html">TQt toolkit</a>.
|
||
|
|
Copyright © 1995-2007
|
||
|
|
<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
|
||
|
|
<table width=100% cellspacing=0 border=0><tr>
|
||
|
|
<td>Copyright © 2007
|
||
|
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
||
|
|
<td align=right><div align=right>TQt 3.3.8</div>
|
||
|
|
</table></div></address></body>
|
||
|
|
</html>
|