summaryrefslogtreecommitdiffstats
path: root/doc/html/qsqlcursor.html
diff options
context:
space:
mode:
Diffstat (limited to 'doc/html/qsqlcursor.html')
-rw-r--r--doc/html/qsqlcursor.html761
1 files changed, 761 insertions, 0 deletions
diff --git a/doc/html/qsqlcursor.html b/doc/html/qsqlcursor.html
new file mode 100644
index 000000000..8c6415ee8
--- /dev/null
+++ b/doc/html/qsqlcursor.html
@@ -0,0 +1,761 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
+<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/sql/qsqlcursor.cpp:122 -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
+<title>TQSqlCursor Class</title>
+<style type="text/css"><!--
+fn { margin-left: 1cm; text-indent: -1cm; }
+a:link { color: #004faf; text-decoration: none }
+a:visited { color: #672967; text-decoration: none }
+body { background: #ffffff; color: black; }
+--></style>
+</head>
+<body>
+
+<table border="0" cellpadding="0" cellspacing="0" width="100%">
+<tr bgcolor="#E5E5E5">
+<td valign=center>
+ <a href="index.html">
+<font color="#004faf">Home</font></a>
+ | <a href="classes.html">
+<font color="#004faf">All&nbsp;Classes</font></a>
+ | <a href="mainclasses.html">
+<font color="#004faf">Main&nbsp;Classes</font></a>
+ | <a href="annotated.html">
+<font color="#004faf">Annotated</font></a>
+ | <a href="groups.html">
+<font color="#004faf">Grouped&nbsp;Classes</font></a>
+ | <a href="functions.html">
+<font color="#004faf">Functions</font></a>
+</td>
+<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQSqlCursor Class Reference<br><small>[<a href="sql.html">sql module</a>]</small></h1>
+
+<p>The TQSqlCursor class provides browsing and editing of SQL
+tables and views.
+<a href="#details">More...</a>
+<p><tt>#include &lt;<a href="qsqlcursor-h.html">qsqlcursor.h</a>&gt;</tt>
+<p>Inherits <a href="qsqlrecord.html">TQSqlRecord</a> and <a href="qsqlquery.html">TQSqlQuery</a>.
+<p>Inherited by <a href="qsqlselectcursor.html">TQSqlSelectCursor</a>.
+<p><a href="qsqlcursor-members.html">List of all member functions.</a>
+<h2>Public Members</h2>
+<ul>
+<li class=fn><a href="#TQSqlCursor"><b>TQSqlCursor</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;name = TQString::null, bool&nbsp;autopopulate = TRUE, TQSqlDatabase&nbsp;*&nbsp;db = 0 )</li>
+<li class=fn><a href="#TQSqlCursor-2"><b>TQSqlCursor</b></a> ( const&nbsp;TQSqlCursor&nbsp;&amp;&nbsp;other )</li>
+<li class=fn>TQSqlCursor &amp; <a href="#operator-eq"><b>operator=</b></a> ( const&nbsp;TQSqlCursor&nbsp;&amp;&nbsp;other )</li>
+<li class=fn><a href="#~TQSqlCursor"><b>~TQSqlCursor</b></a> ()</li>
+<li class=fn>enum <a href="#Mode-enum"><b>Mode</b></a> { ReadOnly = 0, Insert = 1, Update = 2, Delete = 4, Writable = 7 }</li>
+<li class=fn>virtual TQSqlIndex <a href="#primaryIndex"><b>primaryIndex</b></a> ( bool&nbsp;setFromCursor = TRUE ) const</li>
+<li class=fn>virtual TQSqlIndex <a href="#index"><b>index</b></a> ( const&nbsp;TQStringList&nbsp;&amp;&nbsp;fieldNames ) const</li>
+<li class=fn>TQSqlIndex <a href="#index-2"><b>index</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;fieldName ) const</li>
+<li class=fn>TQSqlIndex <a href="#index-3"><b>index</b></a> ( const&nbsp;char&nbsp;*&nbsp;fieldName ) const</li>
+<li class=fn>virtual void <a href="#setPrimaryIndex"><b>setPrimaryIndex</b></a> ( const&nbsp;TQSqlIndex&nbsp;&amp;&nbsp;idx )</li>
+<li class=fn>virtual void <a href="#append"><b>append</b></a> ( const&nbsp;TQSqlFieldInfo&nbsp;&amp;&nbsp;fieldInfo )</li>
+<li class=fn>virtual void <a href="#insert"><b>insert</b></a> ( int&nbsp;pos, const&nbsp;TQSqlFieldInfo&nbsp;&amp;&nbsp;fieldInfo )</li>
+<li class=fn>virtual void <a href="#remove"><b>remove</b></a> ( int&nbsp;pos )</li>
+<li class=fn>virtual void <a href="#clear"><b>clear</b></a> ()</li>
+<li class=fn>virtual void <a href="#setGenerated"><b>setGenerated</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;name, bool&nbsp;generated )</li>
+<li class=fn>virtual void <a href="#setGenerated-2"><b>setGenerated</b></a> ( int&nbsp;i, bool&nbsp;generated )</li>
+<li class=fn>virtual TQSqlRecord * <a href="#editBuffer"><b>editBuffer</b></a> ( bool&nbsp;copy = FALSE )</li>
+<li class=fn>virtual TQSqlRecord * <a href="#primeInsert"><b>primeInsert</b></a> ()</li>
+<li class=fn>virtual TQSqlRecord * <a href="#primeUpdate"><b>primeUpdate</b></a> ()</li>
+<li class=fn>virtual TQSqlRecord * <a href="#primeDelete"><b>primeDelete</b></a> ()</li>
+<li class=fn>virtual int <a href="#insert-2"><b>insert</b></a> ( bool&nbsp;invalidate = TRUE )</li>
+<li class=fn>virtual int <a href="#update"><b>update</b></a> ( bool&nbsp;invalidate = TRUE )</li>
+<li class=fn>virtual int <a href="#del"><b>del</b></a> ( bool&nbsp;invalidate = TRUE )</li>
+<li class=fn>virtual void <a href="#setMode"><b>setMode</b></a> ( int&nbsp;mode )</li>
+<li class=fn>int <a href="#mode"><b>mode</b></a> () const</li>
+<li class=fn>virtual void <a href="#setCalculated"><b>setCalculated</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;name, bool&nbsp;calculated )</li>
+<li class=fn>bool <a href="#isCalculated"><b>isCalculated</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;name ) const</li>
+<li class=fn>virtual void <a href="#setTrimmed"><b>setTrimmed</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;name, bool&nbsp;trim )</li>
+<li class=fn>bool <a href="#isTrimmed"><b>isTrimmed</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;name ) const</li>
+<li class=fn>bool <a href="#isReadOnly"><b>isReadOnly</b></a> () const</li>
+<li class=fn>bool <a href="#canInsert"><b>canInsert</b></a> () const</li>
+<li class=fn>bool <a href="#canUpdate"><b>canUpdate</b></a> () const</li>
+<li class=fn>bool <a href="#canDelete"><b>canDelete</b></a> () const</li>
+<li class=fn>bool <a href="#select-2"><b>select</b></a> ()</li>
+<li class=fn>bool <a href="#select-3"><b>select</b></a> ( const&nbsp;TQSqlIndex&nbsp;&amp;&nbsp;sort )</li>
+<li class=fn>bool <a href="#select-4"><b>select</b></a> ( const&nbsp;TQSqlIndex&nbsp;&amp;&nbsp;filter, const&nbsp;TQSqlIndex&nbsp;&amp;&nbsp;sort )</li>
+<li class=fn>virtual bool <a href="#select"><b>select</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;filter, const&nbsp;TQSqlIndex&nbsp;&amp;&nbsp;sort = TQSqlIndex ( ) )</li>
+<li class=fn>virtual void <a href="#setSort"><b>setSort</b></a> ( const&nbsp;TQSqlIndex&nbsp;&amp;&nbsp;sort )</li>
+<li class=fn>TQSqlIndex <a href="#sort"><b>sort</b></a> () const</li>
+<li class=fn>virtual void <a href="#setFilter"><b>setFilter</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;filter )</li>
+<li class=fn>TQString <a href="#filter"><b>filter</b></a> () const</li>
+<li class=fn>virtual void <a href="#setName"><b>setName</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;name, bool&nbsp;autopopulate = TRUE )</li>
+<li class=fn>TQString <a href="#name"><b>name</b></a> () const</li>
+<li class=fn>bool <a href="#isNull"><b>isNull</b></a> ( int&nbsp;i ) const</li>
+<li class=fn>bool <a href="#isNull-2"><b>isNull</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;name ) const</li>
+</ul>
+<h2>Protected Members</h2>
+<ul>
+<li class=fn>virtual TQVariant <a href="#calculateField"><b>calculateField</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;name )</li>
+<li class=fn>virtual int <a href="#update-2"><b>update</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;filter, bool&nbsp;invalidate = TRUE )</li>
+<li class=fn>virtual int <a href="#del-2"><b>del</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;filter, bool&nbsp;invalidate = TRUE )</li>
+<li class=fn>virtual TQString <a href="#toString-3"><b>toString</b></a> ( const&nbsp;TQString&nbsp;&amp;&nbsp;prefix, TQSqlField&nbsp;*&nbsp;field, const&nbsp;TQString&nbsp;&amp;&nbsp;fieldSep ) const</li>
+<li class=fn>virtual TQString <a href="#toString"><b>toString</b></a> ( TQSqlRecord&nbsp;*&nbsp;rec, const&nbsp;TQString&nbsp;&amp;&nbsp;prefix, const&nbsp;TQString&nbsp;&amp;&nbsp;fieldSep, const&nbsp;TQString&nbsp;&amp;&nbsp;sep ) const</li>
+<li class=fn>virtual TQString <a href="#toString-4"><b>toString</b></a> ( const&nbsp;TQSqlIndex&nbsp;&amp;&nbsp;i, TQSqlRecord&nbsp;*&nbsp;rec, const&nbsp;TQString&nbsp;&amp;&nbsp;prefix, const&nbsp;TQString&nbsp;&amp;&nbsp;fieldSep, const&nbsp;TQString&nbsp;&amp;&nbsp;sep ) const</li>
+</ul>
+<hr><a name="details"></a><h2>Detailed Description</h2>
+
+
+The TQSqlCursor class provides browsing and editing of SQL
+tables and views.
+<p>
+
+<p> A TQSqlCursor is a database record (see <a href="qsqlrecord.html">TQSqlRecord</a>) that
+corresponds to a table or view within an SQL database (see <a href="qsqldatabase.html">TQSqlDatabase</a>). There are two buffers in a cursor, one used for
+browsing and one used for editing records. Each buffer contains a
+list of fields which correspond to the fields in the table or
+view.
+<p> When positioned on a valid record, the browse buffer contains the
+values of the current record's fields from the database. The edit
+buffer is separate, and is used for editing existing records and
+inserting new records.
+<p> For browsing data, a cursor must first <a href="#select">select</a>() data from the
+database. After a successful select() the cursor is active
+(<a href="qsqlquery.html#isActive">isActive</a>() returns TRUE), but is initially not positioned on a
+valid record (<a href="qsqlquery.html#isValid">isValid</a>() returns FALSE). To position the cursor on
+a valid record, use one of the navigation functions, <a href="qsqlquery.html#next">next</a>(),
+<a href="qsqlquery.html#prev">prev</a>(), <a href="qsqlquery.html#first">first</a>(), <a href="qsqlquery.html#last">last</a>(), or <a href="qsqlquery.html#seek">seek</a>(). Once positioned on a valid
+record, data can be retrieved from the browse buffer using
+<a href="qsqlquery.html#value">value</a>(). If a navigation function is not successful, it returns
+FALSE, the cursor will no longer be positioned on a valid record
+and the values returned by value() are undefined.
+<p> For example:
+<p>
+
+<pre> TQSqlCursor cur( "staff" ); // Specify the table/view name
+ <a name="x2178"></a> cur.<a href="#select">select</a>(); // We'll retrieve every record
+ while ( cur.<a href="qsqlquery.html#next">next</a>() ) {
+ <a name="x2179"></a> <a href="qapplication.html#qDebug">qDebug</a>( cur.<a href="qsqlquery.html#value">value</a>( "id" ).toString() + ": " +
+ cur.<a href="qsqlquery.html#value">value</a>( "surname" ).toString() + " " +
+ cur.<a href="qsqlquery.html#value">value</a>( "salary" ).toString() );
+ }
+</pre>
+<p> In the above example, a cursor is created specifying a table or
+view name in the database. Then, <a href="#select">select</a>() is called, which can be
+optionally parameterised to filter and order the records
+retrieved. Each record in the cursor is retrieved using <a href="qsqlquery.html#next">next</a>().
+When next() returns FALSE, there are no more records to process,
+and the loop terminates.
+<p> For editing records (rows of data), a cursor contains a separate
+edit buffer which is independent of the fields used when browsing.
+The functions <a href="#insert">insert</a>(), <a href="#update">update</a>() and <a href="#del">del</a>() operate on the edit
+buffer. This allows the cursor to be repositioned to other
+records while simultaneously maintaining a separate buffer for
+edits. You can get a pointer to the edit buffer using
+<a href="#editBuffer">editBuffer</a>(). The <a href="#primeInsert">primeInsert</a>(), <a href="#primeUpdate">primeUpdate</a>() and <a href="#primeDelete">primeDelete</a>()
+functions also return a pointer to the edit buffer and prepare it
+for insert, update and delete respectively. Edit operations only
+affect a single row at a time. Note that update() and del()
+retquire that the table or view contain a <a href="#primaryIndex">primaryIndex</a>() to ensure
+that edit operations affect a unique record within the database.
+<p> For example:
+<p>
+
+<pre> TQSqlCursor cur( "prices" );
+ <a name="x2200"></a> cur.<a href="#select">select</a>( "id=202" );
+ if ( cur.<a href="qsqlquery.html#next">next</a>() ) {
+ <a name="x2199"></a> <a href="qsqlrecord.html">TQSqlRecord</a> *buffer = cur.<a href="#primeUpdate">primeUpdate</a>();
+ <a name="x2204"></a> double price = buffer-&gt;<a href="qsqlrecord.html#value">value</a>( "price" ).toDouble();
+ double newprice = price * 1.05;
+ <a name="x2203"></a> buffer-&gt;<a href="qsqlrecord.html#setValue">setValue</a>( "price", newprice );
+ <a name="x2201"></a> cur.<a href="#update">update</a>();
+ }
+</pre>
+<p> To edit an existing database record, first move to the record you
+wish to update. Call <a href="#primeUpdate">primeUpdate</a>() to get the pointer to the
+cursor's edit buffer. Then use this pointer to modify the values
+in the edit buffer. Finally, call <a href="#update">update</a>() to save the changes to
+the database. The values in the edit buffer will be used to
+locate the appropriate record when updating the database (see
+<a href="#primaryIndex">primaryIndex</a>()).
+<p> Similarly, when deleting an existing database record, first move
+to the record you wish to delete. Then, call <a href="#primeDelete">primeDelete</a>() to get
+the pointer to the edit buffer. Finally, call <a href="#del">del</a>() to delete the
+record from the database. Again, the values in the edit buffer
+will be used to locate and delete the appropriate record.
+<p> To insert a new record, call <a href="#primeInsert">primeInsert</a>() to get the pointer to
+the edit buffer. Use this pointer to populate the edit buffer
+with new values and then <a href="#insert">insert</a>() the record into the database.
+<p> After calling insert(), update() or del(), the cursor is no longer
+positioned on a valid record and can no longer be navigated
+(<a href="qsqlquery.html#isValid">isValid</a>() return FALSE). The reason for this is that any changes
+made to the database will not be visible until <a href="#select">select</a>() is called
+to refresh the cursor. You can change this behavior by passing
+FALSE to insert(), <a href="#update">update</a>() or del() which will prevent the cursor
+from becoming invalid. The edits will still not be visible when
+navigating the cursor until select() is called.
+<p> TQSqlCursor contains virtual methods which allow editing behavior
+to be customized by subclasses. This allows custom cursors to be
+created that encapsulate the editing behavior of a database table
+for an entire application. For example, a cursor can be customized
+to always auto-number primary index fields, or provide fields with
+suitable default values, when inserting new records. TQSqlCursor
+generates SQL statements which are sent to the database engine;
+you can control which fields are included in these statements
+using <a href="#setGenerated">setGenerated</a>().
+<p> Note that TQSqlCursor does not inherit from <a href="qobject.html">TQObject</a>. This means
+that you are responsible for destroying instances of this class
+yourself. However if you create a TQSqlCursor and use it in a
+<a href="qdatatable.html">TQDataTable</a>, <a href="qdatabrowser.html">TQDataBrowser</a> or a <a href="qdataview.html">TQDataView</a> these classes will
+usually take ownership of the cursor and destroy it when they
+don't need it anymore. The documentation for <a href="qdatatable.html">TQDataTable</a>,
+<a href="qdatabrowser.html">TQDataBrowser</a> and <a href="qdataview.html">TQDataView</a> explicitly states which calls take
+ownership of the cursor.
+<p>See also <a href="database.html">Database Classes</a>.
+
+<hr><h2>Member Type Documentation</h2>
+<h3 class=fn><a name="Mode-enum"></a>TQSqlCursor::Mode</h3>
+
+<p> This enum type describes how TQSqlCursor operates on records in the
+database.
+<ul>
+<li><tt>TQSqlCursor::ReadOnly</tt> - the cursor can only SELECT records from the
+database.
+<li><tt>TQSqlCursor::Insert</tt> - the cursor can INSERT records into the database.
+<li><tt>TQSqlCursor::Update</tt> - the cursor can UPDATE records in the database.
+<li><tt>TQSqlCursor::Delete</tt> - the cursor can DELETE records from the database.
+<li><tt>TQSqlCursor::Writable</tt> - the cursor can INSERT, UPDATE and DELETE records
+in the database.
+</ul>
+<hr><h2>Member Function Documentation</h2>
+<h3 class=fn><a name="TQSqlCursor"></a>TQSqlCursor::TQSqlCursor ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;name = TQString::null, bool&nbsp;autopopulate = TRUE, <a href="qsqldatabase.html">TQSqlDatabase</a>&nbsp;*&nbsp;db = 0 )
+</h3>
+Constructs a cursor on database <em>db</em> using table or view <em>name</em>.
+<p> If <em>autopopulate</em> is TRUE (the default), the <em>name</em> of the
+cursor must correspond to an existing table or view name in the
+database so that field information can be automatically created.
+If the table or view does not exist, the cursor will not be
+functional.
+<p> The cursor is created with an initial mode of TQSqlCursor::Writable
+(meaning that records can be inserted, updated or deleted using
+the cursor). If the cursor does not have a unique primary index,
+update and deletes cannot be performed.
+<p> Note that <em>autopopulate</em> refers to populating the cursor with
+meta-data, e.g. the names of the table's fields, not with
+retrieving data. The <a href="#select">select</a>() function is used to populate the
+cursor with data.
+<p> <p>See also <a href="#setName">setName</a>() and <a href="#setMode">setMode</a>().
+
+<h3 class=fn><a name="TQSqlCursor-2"></a>TQSqlCursor::TQSqlCursor ( const&nbsp;<a href="qsqlcursor.html">TQSqlCursor</a>&nbsp;&amp;&nbsp;other )
+</h3>
+Constructs a copy of <em>other</em>.
+
+<h3 class=fn><a name="~TQSqlCursor"></a>TQSqlCursor::~TQSqlCursor ()
+</h3>
+Destroys the object and frees any allocated resources.
+
+<h3 class=fn>void <a name="append"></a>TQSqlCursor::append ( const&nbsp;<a href="qsqlfieldinfo.html">TQSqlFieldInfo</a>&nbsp;&amp;&nbsp;fieldInfo )<tt> [virtual]</tt>
+</h3>
+Append a copy of field <em>fieldInfo</em> to the end of the cursor. Note
+that all references to the cursor edit buffer become invalidated.
+
+<h3 class=fn><a href="qvariant.html">TQVariant</a> <a name="calculateField"></a>TQSqlCursor::calculateField ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;name )<tt> [virtual protected]</tt>
+</h3>
+Protected virtual function which is called whenever a field needs
+to be calculated. If calculated fields are being used, derived
+classes must reimplement this function and return the appropriate
+value for field <em>name</em>. The default implementation returns an
+invalid <a href="qvariant.html">TQVariant</a>.
+<p> <p>See also <a href="#setCalculated">setCalculated</a>().
+
+<p>Examples: <a href="sql.html#x2259">sql/overview/subclass3/main.cpp</a> and <a href="sql.html#x2263">sql/overview/subclass4/main.cpp</a>.
+<h3 class=fn>bool <a name="canDelete"></a>TQSqlCursor::canDelete () const
+</h3>
+Returns TRUE if the cursor will perform deletes; otherwise returns
+FALSE.
+<p> <p>See also <a href="#setMode">setMode</a>().
+
+<h3 class=fn>bool <a name="canInsert"></a>TQSqlCursor::canInsert () const
+</h3>
+Returns TRUE if the cursor will perform inserts; otherwise returns
+FALSE.
+<p> <p>See also <a href="#setMode">setMode</a>().
+
+<h3 class=fn>bool <a name="canUpdate"></a>TQSqlCursor::canUpdate () const
+</h3>
+Returns TRUE if the cursor will perform updates; otherwise returns
+FALSE.
+<p> <p>See also <a href="#setMode">setMode</a>().
+
+<h3 class=fn>void <a name="clear"></a>TQSqlCursor::clear ()<tt> [virtual]</tt>
+</h3>
+Removes all fields from the cursor. Note that all references to
+the cursor edit buffer become invalidated.
+
+<p>Reimplemented from <a href="qsqlrecord.html#clear">TQSqlRecord</a>.
+<h3 class=fn>int <a name="del"></a>TQSqlCursor::del ( bool&nbsp;invalidate = TRUE )<tt> [virtual]</tt>
+</h3>
+Deletes a record from the database using the cursor's primary
+index and the contents of the cursor edit buffer. Returns the
+number of records which were deleted.
+For error information, use <a href="qsqlquery.html#lastError">lastError</a>().
+<p> Only records which meet the filter criteria specified by the
+cursor's primary index are deleted. If the cursor does not contain
+a primary index, no delete is performed and 0 is returned. If <em>invalidate</em> is TRUE (the default), the current cursor can no longer
+be navigated. A new <a href="#select">select</a>() call must be made before you can move
+to a valid record. For example:
+<p>
+
+<pre> TQSqlCursor cur( "prices" );
+ <a name="x2207"></a> cur.<a href="#select">select</a>( "id=999" );
+ <a name="x2208"></a> if ( cur.<a href="qsqlquery.html#next">next</a>() ) {
+ <a name="x2206"></a> cur.<a href="#primeDelete">primeDelete</a>();
+ <a name="x2205"></a> cur.<a href="#del">del</a>();
+ }
+</pre>
+<p> In the above example, a cursor is created on the 'prices' table
+and positioned to the record to be deleted. First <a href="#primeDelete">primeDelete</a>() is
+called to populate the edit buffer with the current cursor values,
+e.g. with an id of 999, and then <a href="#del">del</a>() is called to actually
+delete the record from the database. Remember: all edit operations
+(<a href="#insert">insert</a>(), <a href="#update">update</a>() and delete()) operate on the contents of the
+cursor edit buffer and not on the contents of the cursor itself.
+<p> <p>See also <a href="#primeDelete">primeDelete</a>(), <a href="#setMode">setMode</a>(), and <a href="qsqlquery.html#lastError">lastError</a>().
+
+<p>Example: <a href="sql.html#x2205">sql/overview/delete/main.cpp</a>.
+<h3 class=fn>int <a name="del-2"></a>TQSqlCursor::del ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;filter, bool&nbsp;invalidate = TRUE )<tt> [virtual protected]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Deletes the current cursor record from the database using the
+filter <em>filter</em>. Only records which meet the filter criteria are
+deleted. Returns the number of records which were deleted. If <em>invalidate</em> is TRUE (the default), the current cursor can no longer
+be navigated. A new <a href="#select">select</a>() call must be made before you can move
+to a valid record. For error information, use <a href="qsqlquery.html#lastError">lastError</a>().
+<p> The <em>filter</em> is an SQL <tt>WHERE</tt> clause, e.g. <tt>id=500</tt>.
+<p> <p>See also <a href="#setMode">setMode</a>() and <a href="qsqlquery.html#lastError">lastError</a>().
+
+<h3 class=fn><a href="qsqlrecord.html">TQSqlRecord</a>&nbsp;* <a name="editBuffer"></a>TQSqlCursor::editBuffer ( bool&nbsp;copy = FALSE )<tt> [virtual]</tt>
+</h3>
+Returns the current internal edit buffer. If <em>copy</em> is TRUE (the
+default is FALSE), the current cursor field values are first
+copied into the edit buffer. The edit buffer is valid as long as
+the cursor remains valid. The cursor retains ownership of the
+returned pointer, so it must not be deleted or modified.
+<p> <p>See also <a href="#primeInsert">primeInsert</a>(), <a href="#primeUpdate">primeUpdate</a>(), and <a href="#primeDelete">primeDelete</a>().
+
+<h3 class=fn><a href="qstring.html">TQString</a> <a name="filter"></a>TQSqlCursor::filter () const
+</h3>
+Returns the current filter, or an empty string if there is no
+current filter.
+
+<h3 class=fn><a href="qsqlindex.html">TQSqlIndex</a> <a name="index"></a>TQSqlCursor::index ( const&nbsp;<a href="qstringlist.html">TQStringList</a>&nbsp;&amp;&nbsp;fieldNames ) const<tt> [virtual]</tt>
+</h3>
+Returns an index composed of <em>fieldNames</em>, all in ASCending
+order. Note that all field names must exist in the cursor,
+otherwise an empty index is returned.
+<p> <p>See also <a href="qsqlindex.html">TQSqlIndex</a>.
+
+<p>Examples: <a href="sql.html#x2188">sql/overview/extract/main.cpp</a>, <a href="sql.html#x2181">sql/overview/order1/main.cpp</a>, <a href="sql.html#x2184">sql/overview/order2/main.cpp</a>, and <a href="sql.html#x2241">sql/overview/table3/main.cpp</a>.
+<h3 class=fn><a href="qsqlindex.html">TQSqlIndex</a> <a name="index-2"></a>TQSqlCursor::index ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;fieldName ) const
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns an index based on <em>fieldName</em>.
+
+<h3 class=fn><a href="qsqlindex.html">TQSqlIndex</a> <a name="index-3"></a>TQSqlCursor::index ( const&nbsp;char&nbsp;*&nbsp;fieldName ) const
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns an index based on <em>fieldName</em>.
+
+<h3 class=fn>void <a name="insert"></a>TQSqlCursor::insert ( int&nbsp;pos, const&nbsp;<a href="qsqlfieldinfo.html">TQSqlFieldInfo</a>&nbsp;&amp;&nbsp;fieldInfo )<tt> [virtual]</tt>
+</h3>
+Insert a copy of <em>fieldInfo</em> at position <em>pos</em>. If a field
+already exists at <em>pos</em>, it is removed. Note that all references
+to the cursor edit buffer become invalidated.
+
+<p>Examples: <a href="sql.html#x2194">sql/overview/insert/main.cpp</a> and <a href="qsqlcursor.html#x2446">sql/overview/insert2/main.cpp</a>.
+<h3 class=fn>int <a name="insert-2"></a>TQSqlCursor::insert ( bool&nbsp;invalidate = TRUE )<tt> [virtual]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Inserts the current contents of the cursor's edit record buffer
+into the database, if the cursor allows inserts. Returns the
+number of rows affected by the insert. For error information, use
+<a href="qsqlquery.html#lastError">lastError</a>().
+<p> If <em>invalidate</em> is TRUE (the default), the cursor will no longer
+be positioned on a valid record and can no longer be navigated. A
+new <a href="#select">select</a>() call must be made before navigating to a valid
+record.
+<p>
+
+<pre> TQSqlCursor cur( "prices" );
+ <a name="x2447"></a> <a href="qsqlrecord.html">TQSqlRecord</a> *buffer = cur.<a href="#primeInsert">primeInsert</a>();
+ <a name="x2448"></a> buffer-&gt;<a href="qsqlrecord.html#setValue">setValue</a>( "id", 53981 );
+ buffer-&gt;<a href="qsqlrecord.html#setValue">setValue</a>( "name", "Thingy" );
+ buffer-&gt;<a href="qsqlrecord.html#setValue">setValue</a>( "price", 105.75 );
+ <a name="x2446"></a> cur.<a href="#insert">insert</a>();
+</pre>
+<p> In the above example, a cursor is created on the 'prices' table
+and a pointer to the insert buffer is atquired using <a href="#primeInsert">primeInsert</a>().
+Each field's value is set to the desired value and then <a href="#insert">insert</a>()
+is called to insert the data into the database. Remember: all edit
+operations (insert(), <a href="#update">update</a>() and delete()) operate on the
+contents of the cursor edit buffer and not on the contents of the
+cursor itself.
+<p> <p>See also <a href="#setMode">setMode</a>() and <a href="qsqlquery.html#lastError">lastError</a>().
+
+<h3 class=fn>bool <a name="isCalculated"></a>TQSqlCursor::isCalculated ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;name ) const
+</h3>
+Returns TRUE if the field <em>name</em> exists and is calculated;
+otherwise returns FALSE.
+<p> <p>See also <a href="#setCalculated">setCalculated</a>().
+
+<h3 class=fn>bool <a name="isNull"></a>TQSqlCursor::isNull ( int&nbsp;i ) const
+</h3>
+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> This is the same as calling <a href="qsqlrecord.html#isNull">TQSqlRecord::isNull</a>( <em>i</em> )
+
+<h3 class=fn>bool <a name="isNull-2"></a>TQSqlCursor::isNull ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;name ) const
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> 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> This is the same as calling <a href="qsqlrecord.html#isNull">TQSqlRecord::isNull</a>( <em>name</em> )
+
+<h3 class=fn>bool <a name="isReadOnly"></a>TQSqlCursor::isReadOnly () const
+</h3>
+Returns TRUE if the cursor is read-only; otherwise returns FALSE.
+The default is FALSE. Read-only cursors cannot be edited using
+<a href="#insert">insert</a>(), <a href="#update">update</a>() or <a href="#del">del</a>().
+<p> <p>See also <a href="#setMode">setMode</a>().
+
+<h3 class=fn>bool <a name="isTrimmed"></a>TQSqlCursor::isTrimmed ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;name ) const
+</h3>
+Returns TRUE if the field <em>name</em> exists and is trimmed; otherwise
+returns FALSE.
+<p> When a trimmed field of type string or cstring is read from the
+database any trailing (right-most) spaces are removed.
+<p> <p>See also <a href="#setTrimmed">setTrimmed</a>().
+
+<h3 class=fn>int <a name="mode"></a>TQSqlCursor::mode () const
+</h3>
+Returns the current cursor mode.
+<p> <p>See also <a href="#setMode">setMode</a>().
+
+<h3 class=fn><a href="qstring.html">TQString</a> <a name="name"></a>TQSqlCursor::name () const
+</h3>
+Returns the name of the cursor.
+
+<h3 class=fn><a href="qsqlcursor.html">TQSqlCursor</a>&nbsp;&amp; <a name="operator-eq"></a>TQSqlCursor::operator= ( const&nbsp;<a href="qsqlcursor.html">TQSqlCursor</a>&nbsp;&amp;&nbsp;other )
+</h3>
+Sets the cursor equal to <em>other</em>.
+
+<h3 class=fn><a href="qsqlindex.html">TQSqlIndex</a> <a name="primaryIndex"></a>TQSqlCursor::primaryIndex ( bool&nbsp;setFromCursor = TRUE ) const<tt> [virtual]</tt>
+</h3>
+Returns the primary index associated with the cursor as defined in
+the database, or an empty index if there is no primary index. If
+<em>setFromCursor</em> is TRUE (the default), the index fields are
+populated with the corresponding values in the cursor's current
+record.
+
+<h3 class=fn><a href="qsqlrecord.html">TQSqlRecord</a>&nbsp;* <a name="primeDelete"></a>TQSqlCursor::primeDelete ()<tt> [virtual]</tt>
+</h3>
+This function primes the edit buffer's field values for delete and
+returns the edit buffer. The default implementation copies the
+field values from the current cursor record into the edit buffer
+(therefore, this function is equivalent to calling <a href="#editBuffer">editBuffer</a>(
+TRUE ) ). The cursor retains ownership of the returned pointer, so
+it must not be deleted or modified.
+<p> <p>See also <a href="#editBuffer">editBuffer</a>() and <a href="#del">del</a>().
+
+<p>Example: <a href="sql.html#x2206">sql/overview/delete/main.cpp</a>.
+<h3 class=fn><a href="qsqlrecord.html">TQSqlRecord</a>&nbsp;* <a name="primeInsert"></a>TQSqlCursor::primeInsert ()<tt> [virtual]</tt>
+</h3>
+This function primes the edit buffer's field values for insert and
+returns the edit buffer. The default implementation clears all
+field values in the edit buffer. The cursor retains ownership of
+the returned pointer, so it must not be deleted or modified.
+<p> <p>See also <a href="#editBuffer">editBuffer</a>() and <a href="#insert">insert</a>().
+
+<p>Examples: <a href="sql.html#x2195">sql/overview/insert/main.cpp</a>, <a href="qsqlcursor.html#x2447">sql/overview/insert2/main.cpp</a>, <a href="sql.html#x2267">sql/overview/subclass5/main.cpp</a>, and <a href="sqltable-example.html#x2453">sql/sqltable/main.cpp</a>.
+<h3 class=fn><a href="qsqlrecord.html">TQSqlRecord</a>&nbsp;* <a name="primeUpdate"></a>TQSqlCursor::primeUpdate ()<tt> [virtual]</tt>
+</h3>
+This function primes the edit buffer's field values for update and
+returns the edit buffer. The default implementation copies the
+field values from the current cursor record into the edit buffer
+(therefore, this function is equivalent to calling <a href="#editBuffer">editBuffer</a>(
+TRUE ) ). The cursor retains ownership of the returned pointer, so
+it must not be deleted or modified.
+<p> <p>See also <a href="#editBuffer">editBuffer</a>() and <a href="#update">update</a>().
+
+<p>Examples: <a href="sql.html#x2236">sql/overview/custom1/main.cpp</a>, <a href="sql.html#x2223">sql/overview/form1/main.cpp</a>, and <a href="sql.html#x2199">sql/overview/update/main.cpp</a>.
+<h3 class=fn>void <a name="remove"></a>TQSqlCursor::remove ( int&nbsp;pos )<tt> [virtual]</tt>
+</h3>
+Removes the field at <em>pos</em>. If <em>pos</em> does not exist, nothing
+happens. Note that all references to the cursor edit buffer become
+invalidated.
+
+<p>Reimplemented from <a href="qsqlrecord.html#remove">TQSqlRecord</a>.
+<h3 class=fn>bool <a name="select"></a>TQSqlCursor::select ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;filter, const&nbsp;<a href="qsqlindex.html">TQSqlIndex</a>&nbsp;&amp;&nbsp;sort = TQSqlIndex ( ) )<tt> [virtual]</tt>
+</h3>
+Selects all fields in the cursor from the database matching the
+filter criteria <em>filter</em>. The data is returned in the order
+specified by the index <em>sort</em>. Returns TRUE if the data was
+successfully selected; otherwise returns FALSE.
+<p> The <em>filter</em> is a string containing a SQL <tt>WHERE</tt> clause but
+without the 'WHERE' keyword. The cursor is initially positioned at
+an invalid row after this function is called. To move to a valid
+row, use <a href="qsqlquery.html#seek">seek</a>(), <a href="qsqlquery.html#first">first</a>(), <a href="qsqlquery.html#last">last</a>(), <a href="qsqlquery.html#prev">prev</a>() or <a href="qsqlquery.html#next">next</a>().
+<p> Example:
+<pre>
+ TQSqlCursor cur( "Employee" ); // Use the Employee table or view
+ cur.<a href="#select">select</a>( "deptno=10" ); // select all records in department 10
+ while( cur.<a href="qsqlquery.html#next">next</a>() ) {
+ ... // process data
+ }
+ ...
+ // select records in other departments, ordered by department number
+ cur.<a href="#select">select</a>( "deptno&gt;10", cur.<a href="#index">index</a>( "deptno" ) );
+ ...
+ </pre>
+
+<p> The filter will apply to any subsequent <a href="#select">select</a>() calls that do not
+explicitly specify another filter. Similarly the sort will apply
+to any subsequent select() calls that do not explicitly specify
+another sort.
+<p> <pre>
+ TQSqlCursor cur( "Employee" );
+ cur.<a href="#select">select</a>( "deptno=10" ); // select all records in department 10
+ while( cur.<a href="qsqlquery.html#next">next</a>() ) {
+ ... // process data
+ }
+ ...
+ cur.<a href="#select">select</a>(); // re-selects all records in department 10
+ ...
+ </pre>
+
+<p>
+<p>Examples: <a href="sql.html#x2207">sql/overview/delete/main.cpp</a>, <a href="sql.html#x2189">sql/overview/extract/main.cpp</a>, <a href="sql.html#x2182">sql/overview/order1/main.cpp</a>, <a href="sql.html#x2185">sql/overview/order2/main.cpp</a>, <a href="sql.html#x2178">sql/overview/retrieve2/main.cpp</a>, <a href="sql.html#x2242">sql/overview/table3/main.cpp</a>, and <a href="sql.html#x2200">sql/overview/update/main.cpp</a>.
+<h3 class=fn>bool <a name="select-2"></a>TQSqlCursor::select ()
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Selects all fields in the cursor from the database. The rows are
+returned in the order specified by the last call to <a href="#setSort">setSort</a>() or
+the last call to <a href="#select">select</a>() that specified a sort, whichever is the
+most recent. If there is no current sort, the order in which the
+rows are returned is undefined. The records are filtered according
+to the filter specified by the last call to <a href="#setFilter">setFilter</a>() or the
+last call to select() that specified a filter, whichever is the
+most recent. If there is no current filter, all records are
+returned. The cursor is initially positioned at an invalid row. To
+move to a valid row, use <a href="qsqlquery.html#seek">seek</a>(), <a href="qsqlquery.html#first">first</a>(), <a href="qsqlquery.html#last">last</a>(), <a href="qsqlquery.html#prev">prev</a>() or
+<a href="qsqlquery.html#next">next</a>().
+<p> <p>See also <a href="#setSort">setSort</a>() and <a href="#setFilter">setFilter</a>().
+
+<h3 class=fn>bool <a name="select-3"></a>TQSqlCursor::select ( const&nbsp;<a href="qsqlindex.html">TQSqlIndex</a>&nbsp;&amp;&nbsp;sort )
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Selects all fields in the cursor from the database. The data is
+returned in the order specified by the index <em>sort</em>. The records
+are filtered according to the filter specified by the last call to
+<a href="#setFilter">setFilter</a>() or the last call to <a href="#select">select</a>() that specified a filter,
+whichever is the most recent. The cursor is initially positioned
+at an invalid row. To move to a valid row, use <a href="qsqlquery.html#seek">seek</a>(), <a href="qsqlquery.html#first">first</a>(),
+<a href="qsqlquery.html#last">last</a>(), <a href="qsqlquery.html#prev">prev</a>() or <a href="qsqlquery.html#next">next</a>().
+
+<h3 class=fn>bool <a name="select-4"></a>TQSqlCursor::select ( const&nbsp;<a href="qsqlindex.html">TQSqlIndex</a>&nbsp;&amp;&nbsp;filter, const&nbsp;<a href="qsqlindex.html">TQSqlIndex</a>&nbsp;&amp;&nbsp;sort )
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Selects all fields in the cursor matching the filter index <em>filter</em>. The data is returned in the order specified by the index
+<em>sort</em>. The <em>filter</em> index works by constructing a WHERE clause
+using the names of the fields from the <em>filter</em> and their values
+from the current cursor record. The cursor is initially positioned
+at an invalid row. To move to a valid row, use <a href="qsqlquery.html#seek">seek</a>(), <a href="qsqlquery.html#first">first</a>(),
+<a href="qsqlquery.html#last">last</a>(), <a href="qsqlquery.html#prev">prev</a>() or <a href="qsqlquery.html#next">next</a>(). This function is useful, for example,
+for retrieving data based upon a table's primary index:
+<p> <pre>
+ TQSqlCursor cur( "Employee" );
+ <a href="qsqlindex.html">TQSqlIndex</a> pk = cur.<a href="#primaryIndex">primaryIndex</a>();
+ cur.<a href="qsqlrecord.html#setValue">setValue</a>( "id", 10 );
+ cur.<a href="#select">select</a>( pk, pk ); // generates "SELECT ... FROM Employee WHERE id=10 ORDER BY id"
+ ...
+ </pre>
+
+<p> In this example the <a href="qsqlindex.html">TQSqlIndex</a>, pk, is used for two different
+purposes. When used as the filter (first) argument, the field
+names it contains are used to construct the WHERE clause, each set
+to the current cursor value, <tt>WHERE id=10</tt>, in this case. When
+used as the sort (second) argument the field names it contains are
+used for the ORDER BY clause, <tt>ORDER BY id</tt> in this example.
+
+<h3 class=fn>void <a name="setCalculated"></a>TQSqlCursor::setCalculated ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;name, bool&nbsp;calculated )<tt> [virtual]</tt>
+</h3>
+Sets field <em>name</em> to <em>calculated</em>. If the field <em>name</em> does not
+exist, nothing happens. The value of a calculated field is set by
+the <a href="#calculateField">calculateField</a>() virtual function which you must reimplement
+(or the field value will be an invalid <a href="qvariant.html">TQVariant</a>). Calculated
+fields do not appear in generated SQL statements sent to the
+database.
+<p> <p>See also <a href="#calculateField">calculateField</a>() and <a href="qsqlrecord.html#setGenerated">TQSqlRecord::setGenerated</a>().
+
+<h3 class=fn>void <a name="setFilter"></a>TQSqlCursor::setFilter ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;filter )<tt> [virtual]</tt>
+</h3>
+Sets the current filter to <em>filter</em>. Note that no new records are
+selected. To select new records, use <a href="#select">select</a>(). The <em>filter</em> will
+apply to any subsequent select() calls that do not explicitly
+specify a filter.
+<p> The filter is a SQL <tt>WHERE</tt> clause without the keyword 'WHERE',
+e.g. <tt>name='Dave'</tt> which will be processed by the DBMS.
+
+<h3 class=fn>void <a name="setGenerated"></a>TQSqlCursor::setGenerated ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;name, bool&nbsp;generated )<tt> [virtual]</tt>
+</h3>
+Sets the generated flag for the field <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 by <a href="#insert">insert</a>(), <a href="#update">update</a>() or <a href="#del">del</a>().
+<p> <p>See also <a href="qsqlrecord.html#isGenerated">isGenerated</a>().
+
+<p>Reimplemented from <a href="qsqlrecord.html#setGenerated">TQSqlRecord</a>.
+<h3 class=fn>void <a name="setGenerated-2"></a>TQSqlCursor::setGenerated ( int&nbsp;i, bool&nbsp;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="qsqlrecord.html#isGenerated">isGenerated</a>().
+
+<p>Reimplemented from <a href="qsqlrecord.html#setGenerated-2">TQSqlRecord</a>.
+<h3 class=fn>void <a name="setMode"></a>TQSqlCursor::setMode ( int&nbsp;mode )<tt> [virtual]</tt>
+</h3>
+Sets the cursor mode to <em>mode</em>. This value can be an OR'ed
+combination of <a href="#Mode-enum">TQSqlCursor::Mode</a> values. The default mode for a
+cursor is <a href="#Mode-enum">TQSqlCursor::Writable</a>.
+<p> <pre>
+ TQSqlCursor cur( "Employee" );
+ cur.<a href="#setMode">setMode</a>( TQSqlCursor::<a href="#Mode-enum">Writable</a> ); // allow insert/update/delete
+ ...
+ cur.<a href="#setMode">setMode</a>( TQSqlCursor::<a href="#Mode-enum">Insert</a> | TQSqlCursor::<a href="#Mode-enum">Update</a> ); // allow inserts and updates only
+ ...
+ cur.<a href="#setMode">setMode</a>( TQSqlCursor::<a href="#Mode-enum">ReadOnly</a> ); // no inserts/updates/deletes allowed
+
+ </pre>
+
+
+<h3 class=fn>void <a name="setName"></a>TQSqlCursor::setName ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;name, bool&nbsp;autopopulate = TRUE )<tt> [virtual]</tt>
+</h3>
+Sets the name of the cursor to <em>name</em>. If <em>autopopulate</em> is TRUE
+(the default), the <em>name</em> must correspond to a valid table or
+view name in the database. Also, note that all references to the
+cursor edit buffer become invalidated when fields are
+auto-populated. See the TQSqlCursor constructor documentation for
+more information.
+
+<h3 class=fn>void <a name="setPrimaryIndex"></a>TQSqlCursor::setPrimaryIndex ( const&nbsp;<a href="qsqlindex.html">TQSqlIndex</a>&nbsp;&amp;&nbsp;idx )<tt> [virtual]</tt>
+</h3>
+Sets the primary index associated with the cursor to the index <em>idx</em>. Note that this index must contain a field or set of fields
+which identify a unique record within the underlying database
+table or view so that <a href="#update">update</a>() and <a href="#del">del</a>() will execute as expected.
+<p> <p>See also <a href="#update">update</a>() and <a href="#del">del</a>().
+
+<h3 class=fn>void <a name="setSort"></a>TQSqlCursor::setSort ( const&nbsp;<a href="qsqlindex.html">TQSqlIndex</a>&nbsp;&amp;&nbsp;sort )<tt> [virtual]</tt>
+</h3>
+Sets the current sort to <em>sort</em>. Note that no new records are
+selected. To select new records, use <a href="#select">select</a>(). The <em>sort</em> will
+apply to any subsequent select() calls that do not explicitly
+specify a sort.
+
+<h3 class=fn>void <a name="setTrimmed"></a>TQSqlCursor::setTrimmed ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;name, bool&nbsp;trim )<tt> [virtual]</tt>
+</h3>
+Sets field <em>name</em>'s trimmed status to <em>trim</em>. If the field <em>name</em> does not exist, nothing happens.
+<p> When a trimmed field of type string or cstring is read from the
+database any trailing (right-most) spaces are removed.
+<p> <p>See also <a href="#isTrimmed">isTrimmed</a>() and <a href="qvariant.html">TQVariant</a>.
+
+<h3 class=fn><a href="qsqlindex.html">TQSqlIndex</a> <a name="sort"></a>TQSqlCursor::sort () const
+</h3>
+Returns the current sort, or an empty index if there is no current
+sort.
+
+<h3 class=fn><a href="qstring.html">TQString</a> <a name="toString"></a>TQSqlCursor::toString ( <a href="qsqlrecord.html">TQSqlRecord</a>&nbsp;*&nbsp;rec, const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;prefix, const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;fieldSep, const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;sep ) const<tt> [virtual protected]</tt>
+</h3>
+Returns a formatted string composed of all the fields in <em>rec</em>.
+Each field is composed of the <em>prefix</em> (e.g. table or view name),
+".", the field name, the <em>fieldSep</em> and the field value. If the
+<em>prefix</em> is empty then each field will begin with the field name.
+The fields are then joined together separated by <em>sep</em>. Fields
+where <a href="qsqlrecord.html#isGenerated">isGenerated</a>() returns FALSE are not included. This function
+is useful for generating SQL statements.
+
+<h3 class=fn><a href="qstring.html">TQString</a> <a name="toString-3"></a>TQSqlCursor::toString ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;prefix, <a href="qsqlfield.html">TQSqlField</a>&nbsp;*&nbsp;field, const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;fieldSep ) const<tt> [virtual protected]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns a formatted string composed of the <em>prefix</em> (e.g. table
+or view name), ".", the <em>field</em> name, the <em>fieldSep</em> and the
+field value. If the <em>prefix</em> is empty then the string will begin
+with the <em>field</em> name. This function is useful for generating SQL
+statements.
+
+<h3 class=fn><a href="qstring.html">TQString</a> <a name="toString-4"></a>TQSqlCursor::toString ( const&nbsp;<a href="qsqlindex.html">TQSqlIndex</a>&nbsp;&amp;&nbsp;i, <a href="qsqlrecord.html">TQSqlRecord</a>&nbsp;*&nbsp;rec, const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;prefix, const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;fieldSep, const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;sep ) const<tt> [virtual protected]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Returns a formatted string composed of all the fields in the index
+<em>i</em>. Each field is composed of the <em>prefix</em> (e.g. table or view
+name), ".", the field name, the <em>fieldSep</em> and the field value.
+If the <em>prefix</em> is empty then each field will begin with the field
+name. The field values are taken from <em>rec</em>. The fields are then
+joined together separated by <em>sep</em>. Fields where <a href="qsqlrecord.html#isGenerated">isGenerated</a>()
+returns FALSE are ignored. This function is useful for generating
+SQL statements.
+
+<h3 class=fn>int <a name="update"></a>TQSqlCursor::update ( bool&nbsp;invalidate = TRUE )<tt> [virtual]</tt>
+</h3>
+Updates the database with the current contents of the edit buffer.
+Returns the number of records which were updated.
+For error information, use <a href="qsqlquery.html#lastError">lastError</a>().
+<p> Only records which meet the filter criteria specified by the
+cursor's primary index are updated. If the cursor does not contain
+a primary index, no update is performed and 0 is returned.
+<p> If <em>invalidate</em> is TRUE (the default), the current cursor can no
+longer be navigated. A new <a href="#select">select</a>() call must be made before you
+can move to a valid record. For example:
+<p>
+
+<pre> TQSqlCursor cur( "prices" );
+ <a name="x2200"></a> cur.<a href="#select">select</a>( "id=202" );
+ if ( cur.<a href="qsqlquery.html#next">next</a>() ) {
+ <a name="x2199"></a> <a href="qsqlrecord.html">TQSqlRecord</a> *buffer = cur.<a href="#primeUpdate">primeUpdate</a>();
+ <a name="x2204"></a> double price = buffer-&gt;<a href="qsqlrecord.html#value">value</a>( "price" ).toDouble();
+ double newprice = price * 1.05;
+ <a name="x2203"></a> buffer-&gt;<a href="qsqlrecord.html#setValue">setValue</a>( "price", newprice );
+ <a name="x2201"></a> cur.<a href="#update">update</a>();
+ }
+</pre>
+<p> In the above example, a cursor is created on the 'prices' table
+and is positioned on the record to be updated. Then a pointer to
+the cursor's edit buffer is actquired using <a href="#primeUpdate">primeUpdate</a>(). A new
+value is calculated and placed into the edit buffer with the
+<a href="qsqlrecord.html#setValue">setValue</a>() call. Finally, an <a href="#update">update</a>() call is made on the cursor
+which uses the tables's primary index to update the record in the
+database with the contents of the cursor's edit buffer. Remember:
+all edit operations (<a href="#insert">insert</a>(), update() and delete()) operate on
+the contents of the cursor edit buffer and not on the contents of
+the cursor itself.
+<p> Note that if the primary index does not uniquely distinguish
+records the database may be changed into an inconsistent state.
+<p> <p>See also <a href="#setMode">setMode</a>() and <a href="qsqlquery.html#lastError">lastError</a>().
+
+<p>Example: <a href="sql.html#x2201">sql/overview/update/main.cpp</a>.
+<h3 class=fn>int <a name="update-2"></a>TQSqlCursor::update ( const&nbsp;<a href="qstring.html">TQString</a>&nbsp;&amp;&nbsp;filter, bool&nbsp;invalidate = TRUE )<tt> [virtual protected]</tt>
+</h3>
+This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
+<p> Updates the database with the current contents of the cursor edit
+buffer using the specified <em>filter</em>. Returns the number of
+records which were updated.
+For error information, use <a href="qsqlquery.html#lastError">lastError</a>().
+<p> Only records which meet the filter criteria are updated, otherwise
+all records in the table are updated.
+<p> If <em>invalidate</em> is TRUE (the default), the cursor can no longer
+be navigated. A new <a href="#select">select</a>() call must be made before you can move
+to a valid record.
+<p> <p>See also <a href="#primeUpdate">primeUpdate</a>(), <a href="#setMode">setMode</a>(), and <a href="qsqlquery.html#lastError">lastError</a>().
+
+<!-- eof -->
+<hr><p>
+This file is part of the <a href="index.html">TQt toolkit</a>.
+Copyright &copy; 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 &copy; 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>