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| 31 | </td>
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| 32 | <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QSqlRecord Class Reference<br><small>[<a href="sql.html">sql module</a>]</small></h1>
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| 33 |
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| 34 | <p>The QSqlRecord class encapsulates a database record, i.e. a
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| 35 | set of database fields.
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| 36 | <a href="#details">More...</a>
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| 37 | <p><tt>#include <<a href="qsqlrecord-h.html">qsqlrecord.h</a>></tt>
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| 38 | <p>Inherited by <a href="qsqlcursor.html">QSqlCursor</a> and <a href="qsqlindex.html">QSqlIndex</a>.
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| 39 | <p><a href="qsqlrecord-members.html">List of all member functions.</a>
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| 40 | <h2>Public Members</h2>
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| 41 | <ul>
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| 42 | <li class=fn><a href="#QSqlRecord"><b>QSqlRecord</b></a> ()</li>
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| 43 | <li class=fn><a href="#QSqlRecord-2"><b>QSqlRecord</b></a> ( const QSqlRecord & other )</li>
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| 44 | <li class=fn>QSqlRecord & <a href="#operator-eq"><b>operator=</b></a> ( const QSqlRecord & other )</li>
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| 45 | <li class=fn>virtual <a href="#~QSqlRecord"><b>~QSqlRecord</b></a> ()</li>
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| 46 | <li class=fn>virtual QVariant <a href="#value"><b>value</b></a> ( int i ) const</li>
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| 47 | <li class=fn>virtual QVariant <a href="#value-2"><b>value</b></a> ( const QString & name ) const</li>
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| 48 | <li class=fn>virtual void <a href="#setValue"><b>setValue</b></a> ( int i, const QVariant & val )</li>
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| 49 | <li class=fn>virtual void <a href="#setValue-2"><b>setValue</b></a> ( const QString & name, const QVariant & val )</li>
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| 50 | <li class=fn>bool <a href="#isGenerated-2"><b>isGenerated</b></a> ( int i ) const</li>
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| 51 | <li class=fn>bool <a href="#isGenerated"><b>isGenerated</b></a> ( const QString & name ) const</li>
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| 52 | <li class=fn>virtual void <a href="#setGenerated"><b>setGenerated</b></a> ( const QString & name, bool generated )</li>
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| 53 | <li class=fn>virtual void <a href="#setGenerated-2"><b>setGenerated</b></a> ( int i, bool generated )</li>
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| 54 | <li class=fn>virtual void <a href="#setNull"><b>setNull</b></a> ( int i )</li>
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| 55 | <li class=fn>virtual void <a href="#setNull-2"><b>setNull</b></a> ( const QString & name )</li>
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| 56 | <li class=fn>bool <a href="#isNull-4"><b>isNull</b></a> ( int i ) const</li>
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| 57 | <li class=fn>bool <a href="#isNull"><b>isNull</b></a> ( const QString & name ) const</li>
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| 58 | <li class=fn>int <a href="#position"><b>position</b></a> ( const QString & name ) const</li>
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| 59 | <li class=fn>QString <a href="#fieldName"><b>fieldName</b></a> ( int i ) const</li>
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| 60 | <li class=fn>QSqlField * <a href="#field"><b>field</b></a> ( int i )</li>
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| 61 | <li class=fn>QSqlField * <a href="#field-2"><b>field</b></a> ( const QString & name )</li>
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| 62 | <li class=fn>const QSqlField * <a href="#field-3"><b>field</b></a> ( int i ) const</li>
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| 63 | <li class=fn>const QSqlField * <a href="#field-4"><b>field</b></a> ( const QString & name ) const</li>
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| 64 | <li class=fn>virtual void <a href="#append"><b>append</b></a> ( const QSqlField & field )</li>
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| 65 | <li class=fn>virtual void <a href="#insert"><b>insert</b></a> ( int pos, const QSqlField & field )</li>
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| 66 | <li class=fn>virtual void <a href="#remove"><b>remove</b></a> ( int pos )</li>
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| 67 | <li class=fn>bool <a href="#isEmpty"><b>isEmpty</b></a> () const</li>
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| 68 | <li class=fn>bool <a href="#contains"><b>contains</b></a> ( const QString & name ) const</li>
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| 69 | <li class=fn>virtual void <a href="#clear"><b>clear</b></a> ()</li>
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| 70 | <li class=fn>virtual void <a href="#clearValues"><b>clearValues</b></a> ( bool nullify = FALSE )</li>
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| 71 | <li class=fn>uint <a href="#count"><b>count</b></a> () const</li>
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| 72 | <li class=fn>virtual QString <a href="#toString"><b>toString</b></a> ( const QString & prefix = QString::null, const QString & sep = "," ) const</li>
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| 73 | <li class=fn>virtual QStringList <a href="#toStringList"><b>toStringList</b></a> ( const QString & prefix = QString::null ) const</li>
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| 74 | </ul>
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| 75 | <hr><a name="details"></a><h2>Detailed Description</h2>
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| 76 |
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| 77 |
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| 78 | The QSqlRecord class encapsulates a database record, i.e. a
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| 79 | set of database fields.
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| 80 | <p>
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| 81 |
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| 82 | <p> The QSqlRecord class encapsulates the functionality and
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| 83 | characteristics of a database record (usually a table or view within
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| 84 | the database). QSqlRecords support adding and removing fields as
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| 85 | well as setting and retrieving field values.
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| 86 | <p> QSqlRecord is <a href="shclass.html#implicitly-shared">implicitly shared</a>. This means you can make copies of
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| 87 | the record in time O(1). If multiple QSqlRecord instances share
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| 88 | the same data and one is modifying the record's data then this
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| 89 | modifying instance makes a copy and modifies its private copy -
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| 90 | thus it does not affect other instances.
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| 91 | <p> <p>See also <a href="qsqlrecordinfo.html">QSqlRecordInfo</a> and <a href="database.html">Database Classes</a>.
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| 92 |
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| 93 | <hr><h2>Member Function Documentation</h2>
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| 94 | <h3 class=fn><a name="QSqlRecord"></a>QSqlRecord::QSqlRecord ()
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| 95 | </h3>
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| 96 | Constructs an empty record.
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| 97 |
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| 98 | <h3 class=fn><a name="QSqlRecord-2"></a>QSqlRecord::QSqlRecord ( const <a href="qsqlrecord.html">QSqlRecord</a> & other )
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| 99 | </h3>
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| 100 | Constructs a copy of <em>other</em>.
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| 101 |
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| 102 | <h3 class=fn><a name="~QSqlRecord"></a>QSqlRecord::~QSqlRecord ()<tt> [virtual]</tt>
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| 103 | </h3>
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| 104 | Destroys the object and frees any allocated resources.
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| 105 |
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| 106 | <h3 class=fn>void <a name="append"></a>QSqlRecord::append ( const <a href="qsqlfield.html">QSqlField</a> & field )<tt> [virtual]</tt>
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| 107 | </h3>
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| 108 | Append a copy of field <em>field</em> to the end of the record.
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| 109 |
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| 110 | <p>Reimplemented in <a href="qsqlindex.html#append">QSqlIndex</a>.
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| 111 | <h3 class=fn>void <a name="clear"></a>QSqlRecord::clear ()<tt> [virtual]</tt>
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| 112 | </h3>
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| 113 | Removes all the record's fields.
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| 114 | <p> <p>See also <a href="#clearValues">clearValues</a>().
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| 115 |
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| 116 | <p>Reimplemented in <a href="qsqlcursor.html#clear">QSqlCursor</a>.
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| 117 | <h3 class=fn>void <a name="clearValues"></a>QSqlRecord::clearValues ( bool nullify = FALSE )<tt> [virtual]</tt>
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| 118 | </h3>
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| 119 | Clears the value of all fields in the record. If <em>nullify</em> is
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| 120 | TRUE, (the default is FALSE), each field is set to NULL.
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| 121 |
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| 122 | <h3 class=fn>bool <a name="contains"></a>QSqlRecord::contains ( const <a href="qstring.html">QString</a> & name ) const
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| 123 | </h3>
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| 124 | Returns TRUE if there is a field in the record called <em>name</em>;
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| 125 | otherwise returns FALSE.
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| 126 |
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| 127 | <h3 class=fn>uint <a name="count"></a>QSqlRecord::count () const
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| 128 | </h3>
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| 129 | Returns the number of fields in the record.
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| 130 |
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| 131 | <h3 class=fn><a href="qsqlfield.html">QSqlField</a> * <a name="field"></a>QSqlRecord::field ( int i )
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| 132 | </h3>
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| 133 | Returns the field at position <em>i</em> within the record, or 0 if it
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| 134 | cannot be found.
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| 135 |
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| 136 | <h3 class=fn><a href="qsqlfield.html">QSqlField</a> * <a name="field-2"></a>QSqlRecord::field ( const <a href="qstring.html">QString</a> & name )
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| 137 | </h3>
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| 138 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 139 | <p> Returns the field called <em>name</em> within the record, or 0 if it
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| 140 | cannot be found. Field names are not case-sensitive.
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| 141 |
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| 142 | <h3 class=fn>const <a href="qsqlfield.html">QSqlField</a> * <a name="field-3"></a>QSqlRecord::field ( int i ) const
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| 143 | </h3>
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| 144 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 145 | <p>
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| 146 | <h3 class=fn>const <a href="qsqlfield.html">QSqlField</a> * <a name="field-4"></a>QSqlRecord::field ( const <a href="qstring.html">QString</a> & name ) const
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| 147 | </h3>
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| 148 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 149 | <p> Returns the field called <em>name</em> within the record, or 0 if it
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| 150 | cannot be found. Field names are not case-sensitive.
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| 151 |
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| 152 | <h3 class=fn><a href="qstring.html">QString</a> <a name="fieldName"></a>QSqlRecord::fieldName ( int i ) const
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| 153 | </h3>
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| 154 | Returns the name of the field at position <em>i</em>. If the field does
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| 155 | not exist, <a href="qstring.html#QString-null">QString::null</a> is returned.
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| 156 |
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| 157 | <h3 class=fn>void <a name="insert"></a>QSqlRecord::insert ( int pos, const <a href="qsqlfield.html">QSqlField</a> & field )<tt> [virtual]</tt>
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| 158 | </h3>
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| 159 | Insert a copy of <em>field</em> at position <em>pos</em>. If a field already
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| 160 | exists at <em>pos</em>, it is removed.
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| 161 |
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| 162 | <h3 class=fn>bool <a name="isEmpty"></a>QSqlRecord::isEmpty () const
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| 163 | </h3>
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| 164 | Returns TRUE if there are no fields in the record; otherwise
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| 165 | returns FALSE.
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| 166 |
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| 167 | <h3 class=fn>bool <a name="isGenerated"></a>QSqlRecord::isGenerated ( const <a href="qstring.html">QString</a> & name ) const
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| 168 | </h3>
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| 169 | Returns TRUE if the record has a field called <em>name</em> and this
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| 170 | field is to be generated (the default); otherwise returns FALSE.
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| 171 | <p> <p>See also <a href="#setGenerated">setGenerated</a>().
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| 172 |
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| 173 | <h3 class=fn>bool <a name="isGenerated-2"></a>QSqlRecord::isGenerated ( int i ) const
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| 174 | </h3>
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| 175 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 176 | <p> Returns TRUE if the record has a field at position <em>i</em> and this
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| 177 | field is to be generated (the default); otherwise returns FALSE.
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| 178 | <p> <p>See also <a href="#setGenerated">setGenerated</a>().
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| 179 |
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| 180 | <h3 class=fn>bool <a name="isNull"></a>QSqlRecord::isNull ( const <a href="qstring.html">QString</a> & name ) const
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| 181 | </h3>
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| 182 | Returns TRUE if the field called <em>name</em> is NULL or if there is no
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| 183 | field called <em>name</em>; otherwise returns FALSE.
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| 184 | <p> <p>See also <a href="#position">position</a>().
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| 185 |
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| 186 | <h3 class=fn>bool <a name="isNull-4"></a>QSqlRecord::isNull ( int i ) const
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| 187 | </h3>
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| 188 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 189 | <p> Returns TRUE if the field <em>i</em> is NULL or if there is no field at
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| 190 | position <em>i</em>; otherwise returns FALSE.
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| 191 | <p> <p>See also <a href="#fieldName">fieldName</a>().
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| 192 |
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| 193 | <h3 class=fn><a href="qsqlrecord.html">QSqlRecord</a> & <a name="operator-eq"></a>QSqlRecord::operator= ( const <a href="qsqlrecord.html">QSqlRecord</a> & other )
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| 194 | </h3>
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| 195 | Sets the record equal to <em>other</em>.
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| 196 |
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| 197 | <h3 class=fn>int <a name="position"></a>QSqlRecord::position ( const <a href="qstring.html">QString</a> & name ) const
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| 198 | </h3>
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| 199 | Returns the position of the field called <em>name</em> within the
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| 200 | record, or -1 if it cannot be found. Field names are not
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| 201 | case-sensitive. If more than one field matches, the first one is
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| 202 | returned.
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| 203 |
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| 204 | <h3 class=fn>void <a name="remove"></a>QSqlRecord::remove ( int pos )<tt> [virtual]</tt>
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| 205 | </h3>
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| 206 | Removes the field at <em>pos</em>. If <em>pos</em> does not exist, nothing
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| 207 | happens.
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| 208 |
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| 209 | <p>Reimplemented in <a href="qsqlcursor.html#remove">QSqlCursor</a>.
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| 210 | <h3 class=fn>void <a name="setGenerated"></a>QSqlRecord::setGenerated ( const <a href="qstring.html">QString</a> & name, bool generated )<tt> [virtual]</tt>
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| 211 | </h3>
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| 212 | 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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| 213 | fields that have <em>generated</em> set to TRUE are included in the SQL
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| 214 | that is generated, e.g. by <a href="qsqlcursor.html">QSqlCursor</a>.
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| 215 | <p> <p>See also <a href="#isGenerated">isGenerated</a>().
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| 216 |
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| 217 | <p>Reimplemented in <a href="qsqlcursor.html#setGenerated">QSqlCursor</a>.
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| 218 | <h3 class=fn>void <a name="setGenerated-2"></a>QSqlRecord::setGenerated ( int i, bool generated )<tt> [virtual]</tt>
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| 219 | </h3>
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| 220 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 221 | <p> Sets the generated flag for the field <em>i</em> to <em>generated</em>.
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| 222 | <p> <p>See also <a href="#isGenerated">isGenerated</a>().
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| 223 |
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| 224 | <p>Reimplemented in <a href="qsqlcursor.html#setGenerated-2">QSqlCursor</a>.
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| 225 | <h3 class=fn>void <a name="setNull"></a>QSqlRecord::setNull ( int i )<tt> [virtual]</tt>
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| 226 | </h3>
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| 227 | Sets the value of field <em>i</em> to NULL. If the field does not exist,
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| 228 | nothing happens.
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| 229 |
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| 230 | <h3 class=fn>void <a name="setNull-2"></a>QSqlRecord::setNull ( const <a href="qstring.html">QString</a> & name )<tt> [virtual]</tt>
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| 231 | </h3>
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| 232 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 233 | <p> Sets the value of the field called <em>name</em> to NULL. If the field
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| 234 | does not exist, nothing happens.
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| 235 |
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| 236 | <h3 class=fn>void <a name="setValue"></a>QSqlRecord::setValue ( int i, const <a href="qvariant.html">QVariant</a> & val )<tt> [virtual]</tt>
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| 237 | </h3>
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| 238 | Sets the value of the field at position <em>i</em> to <em>val</em>. If the
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| 239 | field does not exist, nothing happens.
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| 240 |
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| 241 | <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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| 242 | <h3 class=fn>void <a name="setValue-2"></a>QSqlRecord::setValue ( const <a href="qstring.html">QString</a> & name, const <a href="qvariant.html">QVariant</a> & val )<tt> [virtual]</tt>
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| 243 | </h3>
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| 244 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 245 | <p> Sets the value of the field called <em>name</em> to <em>val</em>. If the field
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| 246 | does not exist, nothing happens.
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| 247 |
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| 248 | <h3 class=fn><a href="qstring.html">QString</a> <a name="toString"></a>QSqlRecord::toString ( const <a href="qstring.html">QString</a> & prefix = QString::null, const <a href="qstring.html">QString</a> & sep = "," ) const<tt> [virtual]</tt>
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| 249 | </h3>
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| 250 | Returns a list of all the record's field names as a string
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| 251 | separated by <em>sep</em>.
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| 252 | <p> Note that fields which are not generated are <em>not</em> included (see
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| 253 | <a href="#isGenerated">isGenerated</a>()). The returned string is suitable, for example, for
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| 254 | generating SQL SELECT statements. If a <em>prefix</em> is specified,
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| 255 | e.g. a table name, all fields are prefixed in the form:
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| 256 | <p> "<em>prefix</em>.<fieldname>"
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| 257 |
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| 258 | <h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="toStringList"></a>QSqlRecord::toStringList ( const <a href="qstring.html">QString</a> & prefix = QString::null ) const<tt> [virtual]</tt>
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| 259 | </h3>
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| 260 | Returns a list of all the record's field names, each having the
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| 261 | prefix <em>prefix</em>.
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| 262 | <p> Note that fields which have generated set to FALSE are <em>not</em>
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| 263 | included. (See <a href="#isGenerated">isGenerated</a>()). If <em>prefix</em> is supplied, e.g.
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| 264 | a table name, all fields are prefixed in the form:
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| 265 | <p> "<em>prefix</em>.<fieldname>"
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| 266 |
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| 267 | <h3 class=fn><a href="qvariant.html">QVariant</a> <a name="value"></a>QSqlRecord::value ( int i ) const<tt> [virtual]</tt>
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| 268 | </h3>
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| 269 | Returns the value of the field located at position <em>i</em> in the
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| 270 | record. If field <em>i</em> does not exist the resultant behaviour is
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| 271 | undefined.
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| 272 | <p> This function should be used with <a href="qsqlquery.html">QSqlQuery</a>s. When working
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| 273 | with a <a href="qsqlcursor.html">QSqlCursor</a> the <a href="qsqlquery.html#value">value(const
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| 274 | QString&)</a> overload which uses field names is more
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| 275 | appropriate.
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| 276 |
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| 277 | <p>Example: <a href="sql.html#x2204">sql/overview/update/main.cpp</a>.
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| 278 | <h3 class=fn><a href="qvariant.html">QVariant</a> <a name="value-2"></a>QSqlRecord::value ( const <a href="qstring.html">QString</a> & name ) const<tt> [virtual]</tt>
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| 279 | </h3>
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| 280 | This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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| 281 | <p> Returns the value of the field called <em>name</em> in the record. If
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| 282 | field <em>name</em> does not exist the resultant behaviour is undefined.
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| 283 |
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| 284 | <!-- eof -->
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| 285 | <hr><p>
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| 286 | This file is part of the <a href="index.html">Qt toolkit</a>.
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| 287 | Copyright © 1995-2007
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| 288 | <a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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| 289 | <table width=100% cellspacing=0 border=0><tr>
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| 290 | <td>Copyright © 2007
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| 291 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 292 | <td align=right><div align=right>Qt 3.3.8</div>
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| 293 | </table></div></address></body>
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| 294 | </html>
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