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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<b>mysqlpp</b>::<a class="el" href="classmysqlpp_1_1Connection.html">Connection</a></div>
<h1>mysqlpp::Connection Class Reference</h1><!-- doxytag: class="mysqlpp::Connection" --><!-- doxytag: inherits="mysqlpp::OptionalExceptions" -->Manages the connection to the database server.
<a href="#_details">More...</a>
<p>
<code>#include <<a class="el" href="connection_8h-source.html">connection.h</a>></code>
<p>
Inheritance diagram for mysqlpp::Connection:<p><center><img src="classmysqlpp_1_1Connection__inherit__graph.png" border="0" usemap="#mysqlpp_1_1Connection__inherit__map" alt="Inheritance graph"></center>
<map name="mysqlpp_1_1Connection__inherit__map">
<area href="classmysqlpp_1_1TCPConnection.html" shape="rect" coords="5,156,189,180" alt="">
<area href="classmysqlpp_1_1UnixDomainSocketConnection.html" shape="rect" coords="213,156,499,180" alt="">
<area href="classmysqlpp_1_1WindowsNamedPipeConnection.html" shape="rect" coords="523,156,816,180" alt="">
<area href="classmysqlpp_1_1OptionalExceptions.html" shape="rect" coords="249,7,463,31" alt="">
</map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center>Collaboration diagram for mysqlpp::Connection:<p><center><img src="classmysqlpp_1_1Connection__coll__graph.png" border="0" usemap="#mysqlpp_1_1Connection__coll__map" alt="Collaboration graph"></center>
<map name="mysqlpp_1_1Connection__coll__map">
<area href="classmysqlpp_1_1OptionalExceptions.html" shape="rect" coords="5,7,219,31" alt="">
<area href="classmysqlpp_1_1DBDriver.html" shape="rect" coords="333,7,480,31" alt="">
</map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center><a href="classmysqlpp_1_1Connection-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#0053ef79210079a5579e55a12fe5f10a">Connection</a> (bool te=true)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Create object without connecting to the database server. <a href="#0053ef79210079a5579e55a12fe5f10a"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#382ec4947dbb1998833ad0fc6f93d1c9">Connection</a> (const char *db, const char *server=0, const char *user=0, const char *password=0, unsigned int port=0)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Create object and connect to database server in one step. <a href="#382ec4947dbb1998833ad0fc6f93d1c9"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#23e80d1b3fee58e8771b2a6dd3c9ac3f">Connection</a> (const <a class="el" href="classmysqlpp_1_1Connection.html">Connection</a> &other)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Establish a new connection using the same parameters as an existing connection. <a href="#23e80d1b3fee58e8771b2a6dd3c9ac3f"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="8eda1910b116f1ccdc1a86711ca6f660"></a><!-- doxytag: member="mysqlpp::Connection::~Connection" ref="8eda1910b116f1ccdc1a86711ca6f660" args="()" -->
virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#8eda1910b116f1ccdc1a86711ca6f660">~Connection</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Destroy object. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="c878756f63bcd0ffe47ea18f7799429e"></a><!-- doxytag: member="mysqlpp::Connection::client_version" ref="c878756f63bcd0ffe47ea18f7799429e" args="() const " -->
std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#c878756f63bcd0ffe47ea18f7799429e">client_version</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get version of library underpinning the current database driver. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#a8e2b54058f7ff7c480e34129a8ee212">connect</a> (const char *db=0, const char *server=0, const char *user=0, const char *password=0, unsigned int port=0)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Connect to database after object is created. <a href="#a8e2b54058f7ff7c480e34129a8ee212"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#65085de08d705e8b90bfc310cd77b125">connected</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns true if connection was established successfully. <a href="#65085de08d705e8b90bfc310cd77b125"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">ulonglong </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#71356d1ca53c988bf9f1e1946e4a7f48">count_rows</a> (const std::string &table)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the number of rows in a table. <a href="#71356d1ca53c988bf9f1e1946e4a7f48"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#c9852fb87572c6f10c6de051bacf6b8d">create_db</a> (const std::string &db)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Ask the database server to create a database. <a href="#c9852fb87572c6f10c6de051bacf6b8d"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="61e571ee724d79c455555f62472880ef"></a><!-- doxytag: member="mysqlpp::Connection::disconnect" ref="61e571ee724d79c455555f62472880ef" args="()" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#61e571ee724d79c455555f62472880ef">disconnect</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Drop the connection to the database server. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="0d118df40a7bd4bb63e7286b221f7680"></a><!-- doxytag: member="mysqlpp::Connection::driver" ref="0d118df40a7bd4bb63e7286b221f7680" args="()" -->
<a class="el" href="classmysqlpp_1_1DBDriver.html">DBDriver</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#0d118df40a7bd4bb63e7286b221f7680">driver</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns a reference to the current database driver. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#a073e784a16a9d4b357740a626a6b2e1">drop_db</a> (const std::string &db)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Asks the database server to drop (destroy) a database. <a href="#a073e784a16a9d4b357740a626a6b2e1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="3cb1bf601b19dbb87b36bed4590f4214"></a><!-- doxytag: member="mysqlpp::Connection::errnum" ref="3cb1bf601b19dbb87b36bed4590f4214" args="()" -->
int </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#3cb1bf601b19dbb87b36bed4590f4214">errnum</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return last error number associated with this connection. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#73c67c9a4d4c77fcf2c7a98555542c8a">error</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return error message for last error associated with this connection. <a href="#73c67c9a4d4c77fcf2c7a98555542c8a"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#2a047f5c6028d5fb95fad9d8062f2e87">ipc_info</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get information about the IPC connection to the database server. <a href="#2a047f5c6028d5fb95fad9d8062f2e87"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#4964b1400101fc0e812d342c12599e42">kill</a> (unsigned long tid) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Kill a database server thread. <a href="#4964b1400101fc0e812d342c12599e42"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#a63bfef0bee8b3f94a8d33e52e374f40">operator private_bool_type</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Test whether any error has occurred within the object. <a href="#a63bfef0bee8b3f94a8d33e52e374f40"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="af58375723c00a4ac494c83ab384596e"></a><!-- doxytag: member="mysqlpp::Connection::operator=" ref="af58375723c00a4ac494c83ab384596e" args="(const Connection &rhs)" -->
<a class="el" href="classmysqlpp_1_1Connection.html">Connection</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#af58375723c00a4ac494c83ab384596e">operator=</a> (const <a class="el" href="classmysqlpp_1_1Connection.html">Connection</a> &rhs)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Copy an existing <a class="el" href="classmysqlpp_1_1Connection.html">Connection</a> object's state into this object. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#c1dbc411f7ab1debbabe241561fe4091">ping</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">"Pings" the database server <a href="#c1dbc411f7ab1debbabe241561fe4091"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="9279771c37c14b02ac205d70e823dc67"></a><!-- doxytag: member="mysqlpp::Connection::protocol_version" ref="9279771c37c14b02ac205d70e823dc67" args="() const " -->
int </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#9279771c37c14b02ac205d70e823dc67">protocol_version</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns version number of the protocol the database driver uses to communicate with the server. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classmysqlpp_1_1Query.html">Query</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#6954d437d52004915fbc96a0be79ab37">query</a> (const char *qstr=0)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return a new query object. <a href="#6954d437d52004915fbc96a0be79ab37"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="classmysqlpp_1_1Query.html">Query</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#f7aaad10bb2f08cae4384f5c227c0f19">query</a> (const std::string &qstr)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Return a new query object. <a href="#f7aaad10bb2f08cae4384f5c227c0f19"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#f1bd6c380dea4cf157e4de7295550a0c">select_db</a> (const std::string &db)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Change to a different database managed by the database server we are connected to. <a href="#f1bd6c380dea4cf157e4de7295550a0c"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="e2569f5b2e8c645544e120ed205f09d5"></a><!-- doxytag: member="mysqlpp::Connection::server_version" ref="e2569f5b2e8c645544e120ed205f09d5" args="() const " -->
std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#e2569f5b2e8c645544e120ed205f09d5">server_version</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the database server's version string. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#266f69b0e8d9d588e8cc6c5a2a897b87">set_option</a> (<a class="el" href="classmysqlpp_1_1Option.html">Option</a> *o)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Sets a connection option. <a href="#266f69b0e8d9d588e8cc6c5a2a897b87"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="8fed0ebc10f72fe591941dc6f64b6f20"></a><!-- doxytag: member="mysqlpp::Connection::shutdown" ref="8fed0ebc10f72fe591941dc6f64b6f20" args="()" -->
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#8fed0ebc10f72fe591941dc6f64b6f20">shutdown</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Ask database server to shut down. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ef926417f221e8fb2d9d56806ebb5a10"></a><!-- doxytag: member="mysqlpp::Connection::server_status" ref="ef926417f221e8fb2d9d56806ebb5a10" args="() const " -->
std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#ef926417f221e8fb2d9d56806ebb5a10">server_status</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns information about database server's status. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="f3efa036ce69ea78e242a2b3f9c12579"></a><!-- doxytag: member="mysqlpp::Connection::thread_aware" ref="f3efa036ce69ea78e242a2b3f9c12579" args="() const " -->
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#f3efa036ce69ea78e242a2b3f9c12579">thread_aware</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns true if both MySQL++ and database driver we're using were compiled with thread awareness. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="63d89963e63c74fe0dcb0eb00a5a8cbd"></a><!-- doxytag: member="mysqlpp::Connection::thread_end" ref="63d89963e63c74fe0dcb0eb00a5a8cbd" args="()" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#63d89963e63c74fe0dcb0eb00a5a8cbd">thread_end</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Tells the underlying database driver that this thread is done using the library. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">unsigned long </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#60c43e10eb9db82c075443add56785ce">thread_id</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the database server's thread ID for this connection. <a href="#60c43e10eb9db82c075443add56785ce"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#ade1534fea22a5d1e2f315515f23f880">thread_start</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Tells the underlying database driver that the current thread is now using its services. <a href="#ade1534fea22a5d1e2f315515f23f880"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="3dcec3b1e9a1aa6efb287bc9ec11f7d5"></a><!-- doxytag: member="mysqlpp::Connection::build_error_message" ref="3dcec3b1e9a1aa6efb287bc9ec11f7d5" args="(const char *core)" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#3dcec3b1e9a1aa6efb287bc9ec11f7d5">build_error_message</a> (const char *core)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Build an error message in the standard form used whenever one of the methods can't succeed because we're not connected to the database server. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#44070d9f1bee49126320ad815a854ed3">copy</a> (const <a class="el" href="classmysqlpp_1_1Connection.html">Connection</a> &other)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Establish a new connection as a copy of an existing one. <a href="#44070d9f1bee49126320ad815a854ed3"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="d9724a5edab5db2c7a71fdccfe124cb5"></a><!-- doxytag: member="mysqlpp::Connection::parse_ipc_method" ref="d9724a5edab5db2c7a71fdccfe124cb5" args="(const char *server, std::string &host, unsigned int &port, std::string &socket_name)" -->
bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#d9724a5edab5db2c7a71fdccfe124cb5">parse_ipc_method</a> (const char *server, std::string &host, unsigned int &port, std::string &socket_name)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract elements from the server parameter in formats suitable for passing to <a class="el" href="classmysqlpp_1_1DBDriver.html#dbd9ba43e74fca9c46dbe85ea8657c0f">DBDriver::connect()</a>. <br></td></tr>
<tr><td colspan="2"><br><h2>Protected Attributes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="ffbdf4dd97aa66cfa592fc85938faf41"></a><!-- doxytag: member="mysqlpp::Connection::error_message_" ref="ffbdf4dd97aa66cfa592fc85938faf41" args="" -->
std::string </td><td class="memItemRight" valign="bottom"><a class="el" href="classmysqlpp_1_1Connection.html#ffbdf4dd97aa66cfa592fc85938faf41">error_message_</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">MySQL++ specific error, if any. <br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Manages the connection to the database server.
<p>
This class is a thick wrapper around <a class="el" href="classmysqlpp_1_1DBDriver.html">DBDriver</a>, adding high-level error handling, utility functions, and abstraction away from underlying C API details.
<p>
<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="0053ef79210079a5579e55a12fe5f10a"></a><!-- doxytag: member="mysqlpp::Connection::Connection" ref="0053ef79210079a5579e55a12fe5f10a" args="(bool te=true)" -->
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<td class="memname">mysqlpp::Connection::Connection </td>
<td>(</td>
<td class="paramtype">bool </td>
<td class="paramname"> <em>te</em> = <code>true</code> </td>
<td> ) </td>
<td width="100%"></td>
</tr>
</table>
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<div class="memdoc">
<p>
Create object without connecting to the database server.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>te</em> </td><td>if true, exceptions are thrown on errors </td></tr>
</table>
</dl>
</div>
</div><p>
<a class="anchor" name="382ec4947dbb1998833ad0fc6f93d1c9"></a><!-- doxytag: member="mysqlpp::Connection::Connection" ref="382ec4947dbb1998833ad0fc6f93d1c9" args="(const char *db, const char *server=0, const char *user=0, const char *password=0, unsigned int port=0)" -->
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<td class="memname">mysqlpp::Connection::Connection </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>db</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>server</em> = <code>0</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>user</em> = <code>0</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>password</em> = <code>0</code>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>port</em> = <code>0</code></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
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<p>
Create object and connect to database server in one step.
<p>
This constructor allows you to most fully specify the options used when connecting to the database server.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>db</em> </td><td>name of database to select upon connection </td></tr>
<tr><td valign="top"></td><td valign="top"><em>server</em> </td><td>specifies the IPC method and parameters for contacting the server; see below for details </td></tr>
<tr><td valign="top"></td><td valign="top"><em>user</em> </td><td>user name to log in under, or 0 to use the user name this program is running under </td></tr>
<tr><td valign="top"></td><td valign="top"><em>password</em> </td><td>password to use when logging in </td></tr>
<tr><td valign="top"></td><td valign="top"><em>port</em> </td><td>TCP port number database server is listening on, or 0 to use default value; note that you may also give this as part of the <code>server</code> parameter</td></tr>
</table>
</dl>
The server parameter can be any of several different forms:<p>
<ul>
<li><b>0</b>: Let the database driver decide how to connect; usually some sort of localhost IPC method.</li><li><b>"."</b>: On Windows, this means named pipes, if the server supports it</li><li><b>"/some/domain/socket/path"</b>: If the passed string doesn't match one of the previous alternatives and we're on a system that supports Unix domain sockets, MySQL++ will test it to see if it names one, and use it if we have permission.</li><li><b>"host.name.or.ip:port"</b>: If the previous test fails, or if the system doesn't support Unix domain sockets at all, it assumes the string is some kind of network address, optionally followed by a colon and port. The name can be in dotted quad form, a host name, or a domain name. The port can either be a TCP/IP port number or a symbolic service name. If a port or service name is given here and a nonzero value is passed for the <code>port</code> parameter, the latter takes precedence. </li></ul>
</div>
</div><p>
<a class="anchor" name="23e80d1b3fee58e8771b2a6dd3c9ac3f"></a><!-- doxytag: member="mysqlpp::Connection::Connection" ref="23e80d1b3fee58e8771b2a6dd3c9ac3f" args="(const Connection &other)" -->
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<td>(</td>
<td class="paramtype">const <a class="el" href="classmysqlpp_1_1Connection.html">Connection</a> & </td>
<td class="paramname"> <em>other</em> </td>
<td> ) </td>
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</tr>
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<p>
Establish a new connection using the same parameters as an existing connection.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>other</em> </td><td>existing <a class="el" href="classmysqlpp_1_1Connection.html">Connection</a> object </td></tr>
</table>
</dl>
</div>
</div><p>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="a8e2b54058f7ff7c480e34129a8ee212"></a><!-- doxytag: member="mysqlpp::Connection::connect" ref="a8e2b54058f7ff7c480e34129a8ee212" args="(const char *db=0, const char *server=0, const char *user=0, const char *password=0, unsigned int port=0)" -->
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<td class="memname">bool mysqlpp::Connection::connect </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>db</em> = <code>0</code>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>server</em> = <code>0</code>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>user</em> = <code>0</code>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>password</em> = <code>0</code>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>port</em> = <code>0</code></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td width="100%"><code> [virtual]</code></td>
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<p>
Connect to database after object is created.
<p>
It's better to use the connect-on-create constructor if you can. See its documentation for the meaning of these parameters.<p>
If you call this method on an object that is already connected to a database server, the previous connection is dropped and a new connection is established.
</div>
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<a class="anchor" name="65085de08d705e8b90bfc310cd77b125"></a><!-- doxytag: member="mysqlpp::Connection::connected" ref="65085de08d705e8b90bfc310cd77b125" args="() const " -->
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<td class="memname">bool mysqlpp::Connection::connected </td>
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<p>
Returns true if connection was established successfully.
<p>
<dl compact><dt><b>Returns:</b></dt><dd>true if connection was established successfully </dd></dl>
</div>
</div><p>
<a class="anchor" name="44070d9f1bee49126320ad815a854ed3"></a><!-- doxytag: member="mysqlpp::Connection::copy" ref="44070d9f1bee49126320ad815a854ed3" args="(const Connection &other)" -->
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<td class="memname">void mysqlpp::Connection::copy </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classmysqlpp_1_1Connection.html">Connection</a> & </td>
<td class="paramname"> <em>other</em> </td>
<td> ) </td>
<td width="100%"><code> [protected]</code></td>
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<p>
Establish a new connection as a copy of an existing one.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>other</em> </td><td>the connection to copy </td></tr>
</table>
</dl>
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</div><p>
<a class="anchor" name="71356d1ca53c988bf9f1e1946e4a7f48"></a><!-- doxytag: member="mysqlpp::Connection::count_rows" ref="71356d1ca53c988bf9f1e1946e4a7f48" args="(const std::string &table)" -->
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<td class="memname">ulonglong mysqlpp::Connection::count_rows </td>
<td>(</td>
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<td class="paramname"> <em>table</em> </td>
<td> ) </td>
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<p>
Returns the number of rows in a table.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>table</em> </td><td>name of table whose rows you want counted</td></tr>
</table>
</dl>
This is syntactic sugar for a <code>SELECT</code> <code>COUNT(*)</code> <code>FROM</code> <code>table</code> SQL query.
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<a class="anchor" name="c9852fb87572c6f10c6de051bacf6b8d"></a><!-- doxytag: member="mysqlpp::Connection::create_db" ref="c9852fb87572c6f10c6de051bacf6b8d" args="(const std::string &db)" -->
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<td class="paramname"> <em>db</em> </td>
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<p>
Ask the database server to create a database.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>db</em> </td><td>name of database to create</td></tr>
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</dl>
<dl compact><dt><b>Returns:</b></dt><dd>true if database was created successfully </dd></dl>
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<a class="anchor" name="a073e784a16a9d4b357740a626a6b2e1"></a><!-- doxytag: member="mysqlpp::Connection::drop_db" ref="a073e784a16a9d4b357740a626a6b2e1" args="(const std::string &db)" -->
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<p>
Asks the database server to drop (destroy) a database.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>db</em> </td><td>name of database to destroy</td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>true if database was dropped successfully </dd></dl>
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<a class="anchor" name="73c67c9a4d4c77fcf2c7a98555542c8a"></a><!-- doxytag: member="mysqlpp::Connection::error" ref="73c67c9a4d4c77fcf2c7a98555542c8a" args="() const " -->
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<p>
Return error message for last error associated with this connection.
<p>
Returns either a MySQL++-specific error message if one exists, or one from the current database driver otherwise.
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<a class="anchor" name="2a047f5c6028d5fb95fad9d8062f2e87"></a><!-- doxytag: member="mysqlpp::Connection::ipc_info" ref="2a047f5c6028d5fb95fad9d8062f2e87" args="() const " -->
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<td width="100%"> const</td>
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<p>
Get information about the IPC connection to the database server.
<p>
<a class="el" href="classmysqlpp_1_1String.html">String</a> contains info about type of connection (e.g. TCP/IP, named pipe, Unix socket...) and the server hostname.
</div>
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<a class="anchor" name="4964b1400101fc0e812d342c12599e42"></a><!-- doxytag: member="mysqlpp::Connection::kill" ref="4964b1400101fc0e812d342c12599e42" args="(unsigned long tid) const " -->
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<td> ) </td>
<td width="100%"> const</td>
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<p>
Kill a database server thread.
<p>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="classmysqlpp_1_1Connection.html#60c43e10eb9db82c075443add56785ce">thread_id()</a> </dd></dl>
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<a class="anchor" name="a63bfef0bee8b3f94a8d33e52e374f40"></a><!-- doxytag: member="mysqlpp::Connection::operator private_bool_type" ref="a63bfef0bee8b3f94a8d33e52e374f40" args="() const " -->
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<p>
Test whether any error has occurred within the object.
<p>
Allows the object to be used in bool context, like this:<p>
<div class="fragment"><pre class="fragment">
<span class="comment">/// </span>
</pre></div><p>
Prior to MySQL++ v3, the object was always falsy when we weren't connected. Now a true return simply indicates a lack of errors. If you've been using this to test for whether the connection is still up, you need to call <a class="el" href="classmysqlpp_1_1Connection.html#65085de08d705e8b90bfc310cd77b125">connected()</a> instead.
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<a class="anchor" name="c1dbc411f7ab1debbabe241561fe4091"></a><!-- doxytag: member="mysqlpp::Connection::ping" ref="c1dbc411f7ab1debbabe241561fe4091" args="()" -->
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<p>
"Pings" the database server
<p>
<dl compact><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>true</em> </td><td>if server is responding </td></tr>
<tr><td valign="top"></td><td valign="top"><em>false</em> </td><td>if either we already know the connection is down and cannot re-establish it, or if the server did not respond to the ping and we could not re-establish the connection. </td></tr>
</table>
</dl>
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</div><p>
<a class="anchor" name="f7aaad10bb2f08cae4384f5c227c0f19"></a><!-- doxytag: member="mysqlpp::Connection::query" ref="f7aaad10bb2f08cae4384f5c227c0f19" args="(const std::string &qstr)" -->
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<td class="memname"><a class="el" href="classmysqlpp_1_1Query.html">Query</a> mysqlpp::Connection::query </td>
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<td class="paramtype">const std::string & </td>
<td class="paramname"> <em>qstr</em> </td>
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Return a new query object.
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>qstr</em> </td><td>initial query string </td></tr>
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<a class="anchor" name="6954d437d52004915fbc96a0be79ab37"></a><!-- doxytag: member="mysqlpp::Connection::query" ref="6954d437d52004915fbc96a0be79ab37" args="(const char *qstr=0)" -->
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<td class="memname"><a class="el" href="classmysqlpp_1_1Query.html">Query</a> mysqlpp::Connection::query </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>qstr</em> = <code>0</code> </td>
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Return a new query object.
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The returned query object is tied to this connection object, so when you call a method like <a class="el" href="classmysqlpp_1_1Query.html#03ee1b9e393d88de946f5be804ea88cf">execute() </a> on that object, the query is sent to the server this object is connected to.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>qstr</em> </td><td>an optional query string for populating the new <a class="el" href="classmysqlpp_1_1Query.html">Query</a> object </td></tr>
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<a class="anchor" name="f1bd6c380dea4cf157e4de7295550a0c"></a><!-- doxytag: member="mysqlpp::Connection::select_db" ref="f1bd6c380dea4cf157e4de7295550a0c" args="(const std::string &db)" -->
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<td class="memname">bool mysqlpp::Connection::select_db </td>
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Change to a different database managed by the database server we are connected to.
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>db</em> </td><td>database to switch to</td></tr>
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<dl compact><dt><b>Return values:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>true</em> </td><td>if we changed databases successfully </td></tr>
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<a class="anchor" name="266f69b0e8d9d588e8cc6c5a2a897b87"></a><!-- doxytag: member="mysqlpp::Connection::set_option" ref="266f69b0e8d9d588e8cc6c5a2a897b87" args="(Option *o)" -->
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<td class="paramtype"><a class="el" href="classmysqlpp_1_1Option.html">Option</a> * </td>
<td class="paramname"> <em>o</em> </td>
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Sets a connection option.
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>o</em> </td><td>pointer to any derivative of <a class="el" href="classmysqlpp_1_1Option.html">Option</a> allocated on the heap</td></tr>
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Objects passed to this method and successfully set will be released when this <a class="el" href="classmysqlpp_1_1Connection.html">Connection</a> object is destroyed. If an error occurs while setting the option the object will be deleted immediately.<p>
Because there are so many <a class="el" href="classmysqlpp_1_1Option.html">Option</a> subclasses, the actual effect of this function has a wide range. This mechanism abstracts away many things that are unrelated down at the database driver level, hiding them behind a coherent, type-safe interface.<p>
The rules about which options can be set, when, are up to the underlying database driver. Some must be set before the connection is established because they can only be used during that connection setup process. Others can be set at any time after the connection comes up. If you get it wrong, you'll get a <a class="el" href="classmysqlpp_1_1BadOption.html">BadOption</a> exception.<p>
<dl compact><dt><b>Return values:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>true</em> </td><td>if option was successfully set </td></tr>
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<a class="anchor" name="60c43e10eb9db82c075443add56785ce"></a><!-- doxytag: member="mysqlpp::Connection::thread_id" ref="60c43e10eb9db82c075443add56785ce" args="()" -->
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<td class="memname">unsigned long mysqlpp::Connection::thread_id </td>
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Returns the database server's thread ID for this connection.
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This has nothing to do with threading on the client side. The only thing you can do with this value is pass it to <a class="el" href="classmysqlpp_1_1Connection.html#4964b1400101fc0e812d342c12599e42">kill()</a>.
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<a class="anchor" name="ade1534fea22a5d1e2f315515f23f880"></a><!-- doxytag: member="mysqlpp::Connection::thread_start" ref="ade1534fea22a5d1e2f315515f23f880" args="()" -->
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<td class="memname">bool mysqlpp::Connection::thread_start </td>
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Tells the underlying database driver that the current thread is now using its services.
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It's not necessary to call this from the thread that creates the connection as it's done automatically. This method exists for times when multiple threads may use this object; it allows the underlying database driver to set up any per-thread data structures it needs.<p>
The MySQL++ user manual's <a href="../userman/threads.html">chapter on threads</a> details two major strategies for dealing with connections in the face of threads. The Connection-per-thread option frees you from ever having to call this method. The other documented strategy is to use <a class="el" href="classmysqlpp_1_1ConnectionPool.html">ConnectionPool</a>, which opens the possibility for one thread to create a connection that another uses, so you do need to call this method in that case, or with any other similar strategy.<p>
<dl compact><dt><b>Return values:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>True</em> </td><td>if there was no problem </td></tr>
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</dl>
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<hr>The documentation for this class was generated from the following files:<ul>
<li><a class="el" href="connection_8h-source.html">connection.h</a><li>connection.cpp</ul>
<hr size="1"><address style="align: right;"><small>Generated on Fri Feb 29 16:26:20 2008 for MySQL++ by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.7 </small></address>
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