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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/qsqldriver.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
Diffstat (limited to 'doc/html/qsqldriver.html')
| -rw-r--r-- | doc/html/qsqldriver.html | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/doc/html/qsqldriver.html b/doc/html/qsqldriver.html new file mode 100644 index 0000000..c96cdac --- /dev/null +++ b/doc/html/qsqldriver.html @@ -0,0 +1,295 @@ +<!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/qsqldriver.cpp:52 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>QSqlDriver 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 Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped 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>QSqlDriver Class Reference<br><small>[<a href="sql.html">sql module</a>]</small></h1> + +<p>The QSqlDriver class is an abstract base class for accessing +SQL databases. +<a href="#details">More...</a> +<p><tt>#include <<a href="qsqldriver-h.html">qsqldriver.h</a>></tt> +<p>Inherits <a href="qobject.html">QObject</a>. +<p><a href="qsqldriver-members.html">List of all member functions.</a> +<h2>Public Members</h2> +<ul> +<li class=fn>enum <a href="#DriverFeature-enum"><b>DriverFeature</b></a> { Transactions, QuerySize, BLOB, Unicode, PreparedQueries, NamedPlaceholders, PositionalPlaceholders }</li> +<li class=fn><a href="#QSqlDriver"><b>QSqlDriver</b></a> ( QObject * parent = 0, const char * name = 0 )</li> +<li class=fn><a href="#~QSqlDriver"><b>~QSqlDriver</b></a> ()</li> +<li class=fn>bool <a href="#isOpen"><b>isOpen</b></a> () const</li> +<li class=fn>bool <a href="#isOpenError"><b>isOpenError</b></a> () const</li> +<li class=fn>virtual bool <a href="#beginTransaction"><b>beginTransaction</b></a> ()</li> +<li class=fn>virtual bool <a href="#commitTransaction"><b>commitTransaction</b></a> ()</li> +<li class=fn>virtual bool <a href="#rollbackTransaction"><b>rollbackTransaction</b></a> ()</li> +<li class=fn>virtual QStringList <a href="#tables"><b>tables</b></a> ( const QString & tableType ) const</li> +<li class=fn>virtual QSqlIndex <a href="#primaryIndex"><b>primaryIndex</b></a> ( const QString & tableName ) const</li> +<li class=fn>virtual QSqlRecord <a href="#record"><b>record</b></a> ( const QString & tableName ) const</li> +<li class=fn>virtual QSqlRecord <a href="#record-2"><b>record</b></a> ( const QSqlQuery & query ) const</li> +<li class=fn>virtual QSqlRecordInfo <a href="#recordInfo"><b>recordInfo</b></a> ( const QString & tablename ) const</li> +<li class=fn>virtual QSqlRecordInfo <a href="#recordInfo-2"><b>recordInfo</b></a> ( const QSqlQuery & query ) const</li> +<li class=fn>virtual QString <a href="#nullText"><b>nullText</b></a> () const</li> +<li class=fn>virtual QString <a href="#formatValue"><b>formatValue</b></a> ( const QSqlField * field, bool trimStrings = FALSE ) const</li> +<li class=fn>QSqlError <a href="#lastError"><b>lastError</b></a> () const</li> +<li class=fn>virtual bool <a href="#hasFeature"><b>hasFeature</b></a> ( DriverFeature f ) const = 0</li> +<li class=fn>virtual bool <a href="#open"><b>open</b></a> ( const QString & db, const QString & user = QString::null, const QString & password = QString::null, const QString & host = QString::null, int port = -1 ) = 0</li> +<li class=fn>virtual void <a href="#close"><b>close</b></a> () = 0</li> +<li class=fn>virtual QSqlQuery <a href="#createQuery"><b>createQuery</b></a> () const = 0</li> +<li class=fn>bool <a href="#open-2"><b>open</b></a> ( const QString & db, const QString & user, const QString & password, const QString & host, int port, const QString & connOpts )</li> +</ul> +<h2>Protected Members</h2> +<ul> +<li class=fn>virtual void <a href="#setOpen"><b>setOpen</b></a> ( bool o )</li> +<li class=fn>virtual void <a href="#setOpenError"><b>setOpenError</b></a> ( bool e )</li> +<li class=fn>virtual void <a href="#setLastError"><b>setLastError</b></a> ( const QSqlError & e )</li> +</ul> +<hr><a name="details"></a><h2>Detailed Description</h2> + + +The QSqlDriver class is an abstract base class for accessing +SQL databases. +<p> + +<p> This class should not be used directly. Use <a href="qsqldatabase.html">QSqlDatabase</a> instead. +<p>See also <a href="database.html">Database Classes</a>. + +<hr><h2>Member Type Documentation</h2> +<h3 class=fn><a name="DriverFeature-enum"></a>QSqlDriver::DriverFeature</h3> + +<p> This enum contains a list of features a driver may support. Use +<a href="#hasFeature">hasFeature</a>() to query whether a feature is supported or not. +<ul> +<li><tt>QSqlDriver::Transactions</tt> - whether the driver supports SQL transactions +<li><tt>QSqlDriver::QuerySize</tt> - whether the database is capable of reporting the size +of a query. Note that some databases do not support returning the size +(i.e. number of rows returned) of a query, in which case +<a href="qsqlquery.html#size">QSqlQuery::size</a>() will return -1 +<li><tt>QSqlDriver::BLOB</tt> - whether the driver supports Binary Large Object fields +<li><tt>QSqlDriver::Unicode</tt> - whether the driver supports Unicode strings if the +database server does +<li><tt>QSqlDriver::PreparedQueries</tt> - whether the driver supports prepared query execution +<li><tt>QSqlDriver::NamedPlaceholders</tt> - whether the driver supports usage of named placeholders +<li><tt>QSqlDriver::PositionalPlaceholders</tt> - whether the driver supports usage of positional placeholders +</ul><p> More information about supported features can be found in the +<a href="sql-driver.html">Qt SQL driver</a> documentation. +<p> <p>See also <a href="#hasFeature">hasFeature</a>(). + +<hr><h2>Member Function Documentation</h2> +<h3 class=fn><a name="QSqlDriver"></a>QSqlDriver::QSqlDriver ( <a href="qobject.html">QObject</a> * parent = 0, const char * name = 0 ) +</h3> +Default constructor. Creates a new driver with parent <em>parent</em>, +called <em>name</em>. +<p> +<h3 class=fn><a name="~QSqlDriver"></a>QSqlDriver::~QSqlDriver () +</h3> +Destroys the object and frees any allocated resources. + +<h3 class=fn>bool <a name="beginTransaction"></a>QSqlDriver::beginTransaction ()<tt> [virtual]</tt> +</h3> +Protected function which derived classes can reimplement to begin +a transaction. If successful, return TRUE, otherwise return FALSE. +The default implementation returns FALSE. +<p> <p>See also <a href="#commitTransaction">commitTransaction</a>() and <a href="#rollbackTransaction">rollbackTransaction</a>(). + +<h3 class=fn>void <a name="close"></a>QSqlDriver::close ()<tt> [pure virtual]</tt> +</h3> + +<p> Derived classes must reimplement this abstract virtual function in +order to close the database connection. Return TRUE on success, +FALSE on failure. +<p> <p>See also <a href="#setOpen">setOpen</a>(). + +<p> +<h3 class=fn>bool <a name="commitTransaction"></a>QSqlDriver::commitTransaction ()<tt> [virtual]</tt> +</h3> +Protected function which derived classes can reimplement to commit +a transaction. If successful, return TRUE, otherwise return FALSE. +The default implementation returns FALSE. +<p> <p>See also <a href="#beginTransaction">beginTransaction</a>() and <a href="#rollbackTransaction">rollbackTransaction</a>(). + +<h3 class=fn><a href="qsqlquery.html">QSqlQuery</a> <a name="createQuery"></a>QSqlDriver::createQuery () const<tt> [pure virtual]</tt> +</h3> + +<p> Creates an empty SQL result on the database. Derived classes must +reimplement this function and return a <a href="qsqlquery.html">QSqlQuery</a> object +appropriate for their database to the caller. +<p> +<h3 class=fn><a href="qstring.html">QString</a> <a name="formatValue"></a>QSqlDriver::formatValue ( const <a href="qsqlfield.html">QSqlField</a> * field, bool trimStrings = FALSE ) const<tt> [virtual]</tt> +</h3> +Returns a string representation of the <em>field</em> value for the +database. This is used, for example, when constructing INSERT and +UPDATE statements. +<p> The default implementation returns the value formatted as a string +according to the following rules: +<p> <ul> +<p> <li> If <em>field</em> is NULL, <a href="#nullText">nullText</a>() is returned. +<p> <li> If <em>field</em> is character data, the value is returned enclosed +in single quotation marks, which is appropriate for many SQL +databases. Any embedded single-quote characters are escaped +(replaced with two single-quote characters). If <em>trimStrings</em> is +TRUE (the default is FALSE), all trailing whitespace is trimmed +from the field. +<p> <li> If <em>field</em> is date/time data, the value is formatted in ISO +format and enclosed in single quotation marks. If the date/time +data is invalid, nullText() is returned. +<p> <li> If <em>field</em> is bytearray data, and the driver can edit binary +fields, the value is formatted as a hexadecimal string. +<p> <li> For any other field type toString() will be called on its value +and the result returned. +<p> </ul> +<p> <p>See also <a href="qvariant.html#toString">QVariant::toString</a>(). + +<p> +<h3 class=fn>bool <a name="hasFeature"></a>QSqlDriver::hasFeature ( <a href="qsqldriver.html#DriverFeature-enum">DriverFeature</a> f ) const<tt> [pure virtual]</tt> +</h3> + +<p> Returns TRUE if the driver supports feature <em>f</em>; otherwise +returns FALSE. +<p> Note that some databases need to be <a href="#open">open</a>() before this can be +determined. +<p> <p>See also <a href="#DriverFeature-enum">DriverFeature</a>. + +<h3 class=fn>bool <a name="isOpen"></a>QSqlDriver::isOpen () const +</h3> +Returns TRUE if the database connection is open; otherwise returns +FALSE. + +<h3 class=fn>bool <a name="isOpenError"></a>QSqlDriver::isOpenError () const +</h3> +Returns TRUE if the there was an error opening the database +connection; otherwise returns FALSE. + +<h3 class=fn><a href="qsqlerror.html">QSqlError</a> <a name="lastError"></a>QSqlDriver::lastError () const +</h3> +Returns a <a href="qsqlerror.html">QSqlError</a> object which contains information about the +last error that occurred on the database. + +<h3 class=fn><a href="qstring.html">QString</a> <a name="nullText"></a>QSqlDriver::nullText () const<tt> [virtual]</tt> +</h3> +Returns a string representation of the NULL value for the +database. This is used, for example, when constructing INSERT and +UPDATE statements. The default implementation returns the string +"NULL". + +<h3 class=fn>bool <a name="open"></a>QSqlDriver::open ( const <a href="qstring.html">QString</a> & db, const <a href="qstring.html">QString</a> & user = QString::null, const <a href="qstring.html">QString</a> & password = QString::null, const <a href="qstring.html">QString</a> & host = QString::null, int port = -1 )<tt> [pure virtual]</tt> +</h3> + +<p> Derived classes must reimplement this abstract virtual function in +order to open a database connection on database <em>db</em>, using user +name <em>user</em>, password <em>password</em>, host <em>host</em> and port <em>port</em>. +<p> The function <em>must</em> return TRUE on success and FALSE on failure. +<p> <p>See also <a href="#setOpen">setOpen</a>(). + +<p> +<h3 class=fn>bool <a name="open-2"></a>QSqlDriver::open ( const <a href="qstring.html">QString</a> & db, const <a href="qstring.html">QString</a> & user, const <a href="qstring.html">QString</a> & password, const <a href="qstring.html">QString</a> & host, int port, const <a href="qstring.html">QString</a> & connOpts ) +</h3> +This is an overloaded member function, provided for convenience. It behaves essentially like the above function. +<p> Open a database connection on database <em>db</em>, using user name <em>user</em>, password <em>password</em>, host <em>host</em>, port <em>port</em> and +connection options <em>connOpts</em>. +<p> Returns TRUE on success and FALSE on failure. +<p> <p>See also <a href="#setOpen">setOpen</a>(). + +<h3 class=fn><a href="qsqlindex.html">QSqlIndex</a> <a name="primaryIndex"></a>QSqlDriver::primaryIndex ( const <a href="qstring.html">QString</a> & tableName ) const<tt> [virtual]</tt> +</h3> +Returns the primary index for table <em>tableName</em>. Returns an empty +<a href="qsqlindex.html">QSqlIndex</a> if the table doesn't have a primary index. The default +implementation returns an empty index. + +<h3 class=fn><a href="qsqlrecord.html">QSqlRecord</a> <a name="record"></a>QSqlDriver::record ( const <a href="qstring.html">QString</a> & tableName ) const<tt> [virtual]</tt> +</h3> +Returns a <a href="qsqlrecord.html">QSqlRecord</a> populated with the names of the fields in +table <em>tableName</em>. If no such table exists, an empty record is +returned. The default implementation returns an empty record. + +<h3 class=fn><a href="qsqlrecord.html">QSqlRecord</a> <a name="record-2"></a>QSqlDriver::record ( const <a href="qsqlquery.html">QSqlQuery</a> & query ) const<tt> [virtual]</tt> +</h3> +This is an overloaded member function, provided for convenience. It behaves essentially like the above function. +<p> Returns a <a href="qsqlrecord.html">QSqlRecord</a> populated with the names of the fields in the +SQL <em>query</em>. The default implementation returns an empty record. + +<h3 class=fn><a href="qsqlrecordinfo.html">QSqlRecordInfo</a> <a name="recordInfo"></a>QSqlDriver::recordInfo ( const <a href="qstring.html">QString</a> & tablename ) const<tt> [virtual]</tt> +</h3> +Returns a <a href="qsqlrecordinfo.html">QSqlRecordInfo</a> object with meta data about the table <em>tablename</em>. + +<h3 class=fn><a href="qsqlrecordinfo.html">QSqlRecordInfo</a> <a name="recordInfo-2"></a>QSqlDriver::recordInfo ( const <a href="qsqlquery.html">QSqlQuery</a> & query ) const<tt> [virtual]</tt> +</h3> +This is an overloaded member function, provided for convenience. It behaves essentially like the above function. +<p> Returns a <a href="qsqlrecordinfo.html">QSqlRecordInfo</a> object with meta data for the <a href="qsqlquery.html">QSqlQuery</a> +<em>query</em>. Note that this overloaded function may return less +information than the <a href="#recordInfo">recordInfo</a>() function which takes the name of +a table as parameter. + +<h3 class=fn>bool <a name="rollbackTransaction"></a>QSqlDriver::rollbackTransaction ()<tt> [virtual]</tt> +</h3> +Protected function which derived classes can reimplement to +rollback a transaction. If successful, return TRUE, otherwise +return FALSE. The default implementation returns FALSE. +<p> <p>See also <a href="#beginTransaction">beginTransaction</a>() and <a href="#commitTransaction">commitTransaction</a>(). + +<h3 class=fn>void <a name="setLastError"></a>QSqlDriver::setLastError ( const <a href="qsqlerror.html">QSqlError</a> & e )<tt> [virtual protected]</tt> +</h3> +Protected function which allows derived classes to set the value +of the last error, <em>e</em>, that occurred on the database. +<p> <p>See also <a href="#lastError">lastError</a>(). + +<h3 class=fn>void <a name="setOpen"></a>QSqlDriver::setOpen ( bool o )<tt> [virtual protected]</tt> +</h3> +Protected function which sets the open state of the database to <em>o</em>. Derived classes can use this function to report the status of +<a href="#open">open</a>(). +<p> <p>See also <a href="#open">open</a>() and <a href="#setOpenError">setOpenError</a>(). + +<h3 class=fn>void <a name="setOpenError"></a>QSqlDriver::setOpenError ( bool e )<tt> [virtual protected]</tt> +</h3> +Protected function which sets the open error state of the database +to <em>e</em>. Derived classes can use this function to report the +status of <a href="#open">open</a>(). Note that if <em>e</em> is TRUE the open state of the +database is set to closed (i.e. <a href="#isOpen">isOpen</a>() returns FALSE). +<p> <p>See also <a href="#open">open</a>(). + +<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="tables"></a>QSqlDriver::tables ( const <a href="qstring.html">QString</a> & tableType ) const<tt> [virtual]</tt> +</h3> +Returns a list of tables in the database. The default +implementation returns an empty list. +<p> The <em>tableType</em> argument describes what types of tables +should be returned. Due to binary compatibility, the string +contains the value of the enum QSql::TableTypes as text. +An empty string should be treated as QSql::Tables for +downward compatibility. +<p> <p>See also <a href="qsql.html#TableType-enum">QSql::TableType</a>. + +<!-- eof --> +<hr><p> +This file is part of the <a href="index.html">Qt 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>Qt 3.3.8</div> +</table></div></address></body> +</html> |