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<a href="#define-members">Macros</a> |
<a href="#typedef-members">Typedefs</a> </div>
<div class="headertitle"><div class="title">ResultSet.h File Reference</div></div>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>A <b>ResultSet</b> represents a database result set. </p>
<p>A ResultSet is created by executing a SQL SELECT statement using either <a class="el" href="Connection_8h.html#a3d1e39204654573ccac3d8ba3a2eae58" title="Executes a SQL query and returns a ResultSet.">Connection_executeQuery()</a> or <a class="el" href="PreparedStatement_8h.html#a3e33ed8289ac8b8b11438b009a169e63" title="Executes the prepared SQL query.">PreparedStatement_executeQuery()</a>.</p>
<p>A ResultSet maintains a cursor pointing to its current row of data. Initially, the cursor is positioned before the first row. <a class="el" href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3" title="Moves the cursor to the next row.">ResultSet_next()</a> moves the cursor to the next row, and because it returns false when there are no more rows, it can be used in a while loop to iterate through the result set. A ResultSet is not updatable and has a cursor that moves forward only. Thus, you can iterate through it only once and only from the first row to the last row.</p>
<p>The ResultSet interface provides getter methods for retrieving column values from the current row. Values can be retrieved using either the index number of the column or the name of the column. In general, using the column index will be more efficient. <em>Columns are numbered from 1.</em></p>
<p>Column names used as input to getter methods are case sensitive. When a getter method is called with a column name and several columns have the same name, the value of the first matching column will be returned. The column name option is designed to be used when column names are used in the SQL query that generated the result set. For columns that are NOT explicitly named in the query, it is best to use column indices.</p>
<h2><a class="anchor" id="autotoc_md22"></a>
Examples</h2>
<p>The following examples demonstrate how to obtain a ResultSet and how to retrieve values from it.</p>
<h3><a class="anchor" id="autotoc_md23"></a>
Example: Using column names</h3>
<p>In this example, columns are named in the SELECT statement, and we retrieve values using the column names (we could of course also use indices if we want):</p>
<div class="fragment"><div class="line">ResultSet_T r = <a class="code hl_function" href="Connection_8h.html#a3d1e39204654573ccac3d8ba3a2eae58">Connection_executeQuery</a>(con, <span class="stringliteral">"SELECT ssn, name, photo FROM employees"</span>);</div>
<div class="line"><span class="keywordflow">while</span> (<a class="code hl_function" href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3">ResultSet_next</a>(r)) </div>
<div class="line">{</div>
<div class="line"> <span class="keywordtype">int</span> ssn = <a class="code hl_function" href="#a51563d2ce1e948806d34c0960f5d66dc">ResultSet_getIntByName</a>(r, <span class="stringliteral">"ssn"</span>);</div>
<div class="line"> <span class="keyword">const</span> <span class="keywordtype">char</span> *name = <a class="code hl_function" href="#a94f3683ed6ed1926d2b9013d5ffc8f82">ResultSet_getStringByName</a>(r, <span class="stringliteral">"name"</span>);</div>
<div class="line"> <span class="keywordtype">int</span> photoSize;</div>
<div class="line"> <span class="keyword">const</span> <span class="keywordtype">void</span> *photo = <a class="code hl_function" href="#a08e197bc42a118e3cb2ca748b0525ec3">ResultSet_getBlobByName</a>(r, <span class="stringliteral">"photo"</span>, &photoSize);</div>
<div class="line"> <span class="keywordflow">if</span> (photoSize > 0) </div>
<div class="line"> {</div>
<div class="line"> <span class="comment">// Process photo data</span></div>
<div class="line"> }</div>
<div class="line"> <span class="comment">// Process other data...</span></div>
<div class="line">}</div>
<div class="ttc" id="aConnection_8h_html_a3d1e39204654573ccac3d8ba3a2eae58"><div class="ttname"><a href="Connection_8h.html#a3d1e39204654573ccac3d8ba3a2eae58">Connection_executeQuery</a></div><div class="ttdeci">ResultSet_T Connection_executeQuery(T C, const char *sql,...)</div><div class="ttdoc">Executes a SQL query and returns a ResultSet.</div></div>
<div class="ttc" id="aResultSet_8h_html_a08e197bc42a118e3cb2ca748b0525ec3"><div class="ttname"><a href="#a08e197bc42a118e3cb2ca748b0525ec3">ResultSet_getBlobByName</a></div><div class="ttdeci">const void * ResultSet_getBlobByName(T R, const char *columnName, int *size)</div><div class="ttdoc">Gets the designated column's value as a void pointer.</div></div>
<div class="ttc" id="aResultSet_8h_html_a51563d2ce1e948806d34c0960f5d66dc"><div class="ttname"><a href="#a51563d2ce1e948806d34c0960f5d66dc">ResultSet_getIntByName</a></div><div class="ttdeci">int ResultSet_getIntByName(T R, const char *columnName)</div><div class="ttdoc">Gets the designated column's value as an int.</div></div>
<div class="ttc" id="aResultSet_8h_html_a771894bb8c0ddfd90ed6ed9c9c3e46b3"><div class="ttname"><a href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3">ResultSet_next</a></div><div class="ttdeci">bool ResultSet_next(T R)</div><div class="ttdoc">Moves the cursor to the next row.</div></div>
<div class="ttc" id="aResultSet_8h_html_a94f3683ed6ed1926d2b9013d5ffc8f82"><div class="ttname"><a href="#a94f3683ed6ed1926d2b9013d5ffc8f82">ResultSet_getStringByName</a></div><div class="ttdeci">const char * ResultSet_getStringByName(T R, const char *columnName)</div><div class="ttdoc">Gets the designated column's value as a C-string.</div></div>
</div><!-- fragment --><h3><a class="anchor" id="autotoc_md24"></a>
Example: Using column indices</h3>
<p>This example demonstrates selecting a generated result and printing it. When the SELECT statement doesn't name the column, we use the column index to retrieve the value:</p>
<div class="fragment"><div class="line">ResultSet_T r = <a class="code hl_function" href="Connection_8h.html#a3d1e39204654573ccac3d8ba3a2eae58">Connection_executeQuery</a>(con, <span class="stringliteral">"SELECT COUNT(*) FROM employees"</span>);</div>
<div class="line"><span class="keywordflow">if</span> (<a class="code hl_function" href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3">ResultSet_next</a>(r)) </div>
<div class="line">{</div>
<div class="line"> <span class="keyword">const</span> <span class="keywordtype">char</span> *count = <a class="code hl_function" href="#ac65ad967dcaad62aa13d166c446e8f58">ResultSet_getString</a>(r, 1);</div>
<div class="line"> printf(<span class="stringliteral">"Number of employees: %s\n"</span>, <a class="code hl_define" href="zdb_8h.html#a297ccf9a42e722258e3b51f9dabeab0a">valueOr</a>(count, <span class="stringliteral">"none"</span>));</div>
<div class="line">} </div>
<div class="line"><span class="keywordflow">else</span></div>
<div class="line">{</div>
<div class="line"> printf(<span class="stringliteral">"No results returned\n"</span>);</div>
<div class="line">}</div>
<div class="ttc" id="aResultSet_8h_html_ac65ad967dcaad62aa13d166c446e8f58"><div class="ttname"><a href="#ac65ad967dcaad62aa13d166c446e8f58">ResultSet_getString</a></div><div class="ttdeci">const char * ResultSet_getString(T R, int columnIndex)</div><div class="ttdoc">Gets the designated column's value as a C-string.</div></div>
<div class="ttc" id="azdb_8h_html_a297ccf9a42e722258e3b51f9dabeab0a"><div class="ttname"><a href="zdb_8h.html#a297ccf9a42e722258e3b51f9dabeab0a">valueOr</a></div><div class="ttdeci">#define valueOr(expr, default_value)</div><div class="ttdef"><b>Definition</b> zdb.h:107</div></div>
</div><!-- fragment --><h2><a class="anchor" id="autotoc_md25"></a>
Automatic type conversions</h2>
<p>A ResultSet stores values internally as bytes and converts values on-the-fly to numeric types when requested, such as when <a class="el" href="#aa73672053b34ee50c21eac0783b28719" title="Gets the designated column's value as an int.">ResultSet_getInt()</a> or one of the other numeric get-methods are called. In the above example, even if <em>count(*)</em> returns a numeric value, we can use <a class="el" href="#ac65ad967dcaad62aa13d166c446e8f58" title="Gets the designated column's value as a C-string.">ResultSet_getString()</a> to get the number as a string or if we choose, we can use <a class="el" href="#aa73672053b34ee50c21eac0783b28719" title="Gets the designated column's value as an int.">ResultSet_getInt()</a> to get the value as an integer. In the latter case, note that if the column value cannot be converted to a number, an SQLException is thrown.</p>
<h2><a class="anchor" id="autotoc_md26"></a>
Date and Time</h2>
<p>ResultSet provides two principal methods for retrieving temporal column values as C types. <a class="el" href="#a073df52b04dfbaaaf088baede0f770f5" title="Gets the designated column's value as a Unix timestamp.">ResultSet_getTimestamp()</a> converts a SQL timestamp value to a <code>time_t</code> and <a class="el" href="#a98e618557d128694b2239c55f7618262" title="Gets the designated column's value as a Date, Time or DateTime.">ResultSet_getDateTime()</a> returns a <code>tm structure</code> representing a Date, Time, DateTime, or Timestamp column type. To get a temporal column value as a string, simply use <a class="el" href="#ac65ad967dcaad62aa13d166c446e8f58" title="Gets the designated column's value as a C-string.">ResultSet_getString()</a></p>
<p><em>A ResultSet is reentrant, but not thread-safe and should only be used by one thread (at a time).</em></p>
<dl class="section note"><dt>Note</dt><dd>Remember that column indices in ResultSet are 1-based, not 0-based.</dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="Connection_8h.html" title="A Connection represents a connection to a SQL database system.">Connection.h</a> <a class="el" href="PreparedStatement_8h.html" title="A PreparedStatement represents a single SQL statement pre-compiled into byte code for later execution...">PreparedStatement.h</a> <a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
</div><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="define-members" name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:a0acb682b8260ab1c60b918599864e2e5" id="r_a0acb682b8260ab1c60b918599864e2e5"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="#a0acb682b8260ab1c60b918599864e2e5">T</a>   ResultSet_T</td></tr>
<tr class="separator:a0acb682b8260ab1c60b918599864e2e5"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="typedef-members" name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr class="memitem:ac27bdf37e94a374efe32a90c9db7fecc" id="r_ac27bdf37e94a374efe32a90c9db7fecc"><td class="memItemLeft" align="right" valign="top">typedef struct ResultSet_S * </td><td class="memItemRight" valign="bottom"><a class="el" href="#ac27bdf37e94a374efe32a90c9db7fecc">T</a></td></tr>
<tr class="separator:ac27bdf37e94a374efe32a90c9db7fecc"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr><td colspan="2"><div class="groupHeader">Properties</div></td></tr>
<tr class="memitem:a74a9a4c55f9ff432e6cbb5c196627427" id="r_a74a9a4c55f9ff432e6cbb5c196627427"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#a74a9a4c55f9ff432e6cbb5c196627427">ResultSet_getColumnCount</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R)</td></tr>
<tr class="memdesc:a74a9a4c55f9ff432e6cbb5c196627427"><td class="mdescLeft"> </td><td class="mdescRight">Gets the number of columns in this ResultSet. <br /></td></tr>
<tr class="separator:a74a9a4c55f9ff432e6cbb5c196627427"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a10e8a66eabf5cbcdc26edc842199c7bf" id="r_a10e8a66eabf5cbcdc26edc842199c7bf"><td class="memItemLeft" align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="#a10e8a66eabf5cbcdc26edc842199c7bf">ResultSet_getColumnName</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, int columnIndex)</td></tr>
<tr class="memdesc:a10e8a66eabf5cbcdc26edc842199c7bf"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's name. <br /></td></tr>
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<tr class="memitem:a3f9283bcdd0ae95a05b22f30c9c1a08b" id="r_a3f9283bcdd0ae95a05b22f30c9c1a08b"><td class="memItemLeft" align="right" valign="top">long </td><td class="memItemRight" valign="bottom"><a class="el" href="#a3f9283bcdd0ae95a05b22f30c9c1a08b">ResultSet_getColumnSize</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, int columnIndex)</td></tr>
<tr class="memdesc:a3f9283bcdd0ae95a05b22f30c9c1a08b"><td class="mdescLeft"> </td><td class="mdescRight">Gets the size of a column in bytes. <br /></td></tr>
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<tr class="memitem:abba9d66851f27f8cc4fc6511551b8092" id="r_abba9d66851f27f8cc4fc6511551b8092"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="#abba9d66851f27f8cc4fc6511551b8092">ResultSet_setFetchSize</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, int rows)</td></tr>
<tr class="memdesc:abba9d66851f27f8cc4fc6511551b8092"><td class="mdescLeft"> </td><td class="mdescRight">Sets the number of rows to fetch from the database. <br /></td></tr>
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<tr class="memitem:a889b66128f756eb72bb15a1205b64986" id="r_a889b66128f756eb72bb15a1205b64986"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#a889b66128f756eb72bb15a1205b64986">ResultSet_getFetchSize</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R)</td></tr>
<tr class="memdesc:a889b66128f756eb72bb15a1205b64986"><td class="mdescLeft"> </td><td class="mdescRight">Gets the number of rows to fetch from the database. <br /></td></tr>
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<tr><td colspan="2"><div class="groupHeader">Functions</div></td></tr>
<tr class="memitem:a771894bb8c0ddfd90ed6ed9c9c3e46b3" id="r_a771894bb8c0ddfd90ed6ed9c9c3e46b3"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3">ResultSet_next</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R)</td></tr>
<tr class="memdesc:a771894bb8c0ddfd90ed6ed9c9c3e46b3"><td class="mdescLeft"> </td><td class="mdescRight">Moves the cursor to the next row. <br /></td></tr>
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<tr><td colspan="2"><div class="groupHeader">Columns</div></td></tr>
<tr class="memitem:a7a402b4aa9f5c08dd5edd9ee97517673" id="r_a7a402b4aa9f5c08dd5edd9ee97517673"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#a7a402b4aa9f5c08dd5edd9ee97517673">ResultSet_isnull</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, int columnIndex)</td></tr>
<tr class="memdesc:a7a402b4aa9f5c08dd5edd9ee97517673"><td class="mdescLeft"> </td><td class="mdescRight">Checks if the designated column's value is SQL NULL. <br /></td></tr>
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<tr class="memitem:ac65ad967dcaad62aa13d166c446e8f58" id="r_ac65ad967dcaad62aa13d166c446e8f58"><td class="memItemLeft" align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="#ac65ad967dcaad62aa13d166c446e8f58">ResultSet_getString</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, int columnIndex)</td></tr>
<tr class="memdesc:ac65ad967dcaad62aa13d166c446e8f58"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a C-string. <br /></td></tr>
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<tr class="memitem:a94f3683ed6ed1926d2b9013d5ffc8f82" id="r_a94f3683ed6ed1926d2b9013d5ffc8f82"><td class="memItemLeft" align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="#a94f3683ed6ed1926d2b9013d5ffc8f82">ResultSet_getStringByName</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, const char *columnName)</td></tr>
<tr class="memdesc:a94f3683ed6ed1926d2b9013d5ffc8f82"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a C-string. <br /></td></tr>
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<tr class="memitem:aa73672053b34ee50c21eac0783b28719" id="r_aa73672053b34ee50c21eac0783b28719"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#aa73672053b34ee50c21eac0783b28719">ResultSet_getInt</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, int columnIndex)</td></tr>
<tr class="memdesc:aa73672053b34ee50c21eac0783b28719"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as an int. <br /></td></tr>
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<tr class="memitem:a51563d2ce1e948806d34c0960f5d66dc" id="r_a51563d2ce1e948806d34c0960f5d66dc"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#a51563d2ce1e948806d34c0960f5d66dc">ResultSet_getIntByName</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, const char *columnName)</td></tr>
<tr class="memdesc:a51563d2ce1e948806d34c0960f5d66dc"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as an int. <br /></td></tr>
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<tr class="memitem:a5d3ed80bc1b5816f27e135a8e392aca7" id="r_a5d3ed80bc1b5816f27e135a8e392aca7"><td class="memItemLeft" align="right" valign="top">long long </td><td class="memItemRight" valign="bottom"><a class="el" href="#a5d3ed80bc1b5816f27e135a8e392aca7">ResultSet_getLLong</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, int columnIndex)</td></tr>
<tr class="memdesc:a5d3ed80bc1b5816f27e135a8e392aca7"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a long long. <br /></td></tr>
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<tr class="memitem:ab843c4ecf8d195d6449927bf7fb9defd" id="r_ab843c4ecf8d195d6449927bf7fb9defd"><td class="memItemLeft" align="right" valign="top">long long </td><td class="memItemRight" valign="bottom"><a class="el" href="#ab843c4ecf8d195d6449927bf7fb9defd">ResultSet_getLLongByName</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, const char *columnName)</td></tr>
<tr class="memdesc:ab843c4ecf8d195d6449927bf7fb9defd"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a long long. <br /></td></tr>
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<tr class="memitem:ab501755d054fea3bdab5de15a2259e9e" id="r_ab501755d054fea3bdab5de15a2259e9e"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="#ab501755d054fea3bdab5de15a2259e9e">ResultSet_getDouble</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, int columnIndex)</td></tr>
<tr class="memdesc:ab501755d054fea3bdab5de15a2259e9e"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a double. <br /></td></tr>
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<tr class="memitem:a38c392c208d0f6be4c6b4a29c624a367" id="r_a38c392c208d0f6be4c6b4a29c624a367"><td class="memItemLeft" align="right" valign="top">double </td><td class="memItemRight" valign="bottom"><a class="el" href="#a38c392c208d0f6be4c6b4a29c624a367">ResultSet_getDoubleByName</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, const char *columnName)</td></tr>
<tr class="memdesc:a38c392c208d0f6be4c6b4a29c624a367"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a double. <br /></td></tr>
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<tr class="memitem:adee072900d8136c0d6bd0596388f1e83" id="r_adee072900d8136c0d6bd0596388f1e83"><td class="memItemLeft" align="right" valign="top">const void * </td><td class="memItemRight" valign="bottom"><a class="el" href="#adee072900d8136c0d6bd0596388f1e83">ResultSet_getBlob</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, int columnIndex, int *size)</td></tr>
<tr class="memdesc:adee072900d8136c0d6bd0596388f1e83"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a void pointer. <br /></td></tr>
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<tr class="memitem:a08e197bc42a118e3cb2ca748b0525ec3" id="r_a08e197bc42a118e3cb2ca748b0525ec3"><td class="memItemLeft" align="right" valign="top">const void * </td><td class="memItemRight" valign="bottom"><a class="el" href="#a08e197bc42a118e3cb2ca748b0525ec3">ResultSet_getBlobByName</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, const char *columnName, int *size)</td></tr>
<tr class="memdesc:a08e197bc42a118e3cb2ca748b0525ec3"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a void pointer. <br /></td></tr>
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<tr><td colspan="2"><div class="groupHeader">Date and Time</div></td></tr>
<tr class="memitem:a073df52b04dfbaaaf088baede0f770f5" id="r_a073df52b04dfbaaaf088baede0f770f5"><td class="memItemLeft" align="right" valign="top">time_t </td><td class="memItemRight" valign="bottom"><a class="el" href="#a073df52b04dfbaaaf088baede0f770f5">ResultSet_getTimestamp</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, int columnIndex)</td></tr>
<tr class="memdesc:a073df52b04dfbaaaf088baede0f770f5"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a Unix timestamp. <br /></td></tr>
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<tr class="memitem:a9d2d95be1cea80e6213967ce617f576f" id="r_a9d2d95be1cea80e6213967ce617f576f"><td class="memItemLeft" align="right" valign="top">time_t </td><td class="memItemRight" valign="bottom"><a class="el" href="#a9d2d95be1cea80e6213967ce617f576f">ResultSet_getTimestampByName</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, const char *columnName)</td></tr>
<tr class="memdesc:a9d2d95be1cea80e6213967ce617f576f"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a Unix timestamp. <br /></td></tr>
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<tr class="memitem:a98e618557d128694b2239c55f7618262" id="r_a98e618557d128694b2239c55f7618262"><td class="memItemLeft" align="right" valign="top">struct tm </td><td class="memItemRight" valign="bottom"><a class="el" href="#a98e618557d128694b2239c55f7618262">ResultSet_getDateTime</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, int columnIndex)</td></tr>
<tr class="memdesc:a98e618557d128694b2239c55f7618262"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a Date, Time or DateTime. <br /></td></tr>
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<tr class="memitem:a5733613fb15d5a4e614cb9157e4dd86f" id="r_a5733613fb15d5a4e614cb9157e4dd86f"><td class="memItemLeft" align="right" valign="top">struct tm </td><td class="memItemRight" valign="bottom"><a class="el" href="#a5733613fb15d5a4e614cb9157e4dd86f">ResultSet_getDateTimeByName</a> (<a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a> R, const char *columnName)</td></tr>
<tr class="memdesc:a5733613fb15d5a4e614cb9157e4dd86f"><td class="mdescLeft"> </td><td class="mdescRight">Gets the designated column's value as a Date, Time or DateTime. <br /></td></tr>
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<h2 class="groupheader">Macro Definition Documentation</h2>
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<td class="memname">#define <a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a>   ResultSet_T</td>
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<h2 class="groupheader">Typedef Documentation</h2>
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<td class="memname">typedef struct ResultSet_S* <a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td>
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<h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a74a9a4c55f9ff432e6cbb5c196627427">◆ </a></span>ResultSet_getColumnCount()</h2>
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<td class="memname">int ResultSet_getColumnCount </td>
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<p>Gets the number of columns in this ResultSet. </p>
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<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The number of columns </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a10e8a66eabf5cbcdc26edc842199c7bf">◆ </a></span>ResultSet_getColumnName()</h2>
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<td class="memname">const char * ResultSet_getColumnName </td>
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<p>Gets the designated column's name. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnIndex</td><td>The first column is 1, the second is 2, ... </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Column name or NULL if the column does not exist. You should use the method <a class="el" href="#a74a9a4c55f9ff432e6cbb5c196627427" title="Gets the number of columns in this ResultSet.">ResultSet_getColumnCount()</a> to test for the availability of columns in the result set. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a3f9283bcdd0ae95a05b22f30c9c1a08b">◆ </a></span>ResultSet_getColumnSize()</h2>
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<td class="memname">long ResultSet_getColumnSize </td>
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<p>Gets the size of a column in bytes. </p>
<p>If the column is a blob then this method returns the number of bytes in that blob. No type conversions occur. If the result is a string (or a number since a number can be converted into a string) then return the number of bytes in the resulting string.</p>
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<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Column data size </dd></dl>
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<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#abba9d66851f27f8cc4fc6511551b8092">◆ </a></span>ResultSet_setFetchSize()</h2>
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<td class="memname">void ResultSet_setFetchSize </td>
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<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<p>Sets the number of rows to fetch from the database. </p>
<p>ResultSet will prefetch rows in batches of number of <code>rows</code> when <a class="el" href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3" title="Moves the cursor to the next row.">ResultSet_next()</a> is called to reduce the network roundtrip to the database. This method is only applicable to MySQL and Oracle.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">rows</td><td>The number of rows to fetch (1..INT_MAX) </td></tr>
</table>
</dd>
</dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database error occurs </td></tr>
<tr><td class="paramname">AssertException</td><td>If `rows` is less than 1 </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="Connection_8h.html#a69aab12859ab87b931ffb418b7aca328" title="Sets the number of rows to fetch for ResultSet objects.">Connection_setFetchSize</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a889b66128f756eb72bb15a1205b64986">◆ </a></span>ResultSet_getFetchSize()</h2>
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<td class="memname">int ResultSet_getFetchSize </td>
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<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span></td><td>)</td>
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<p>Gets the number of rows to fetch from the database. </p>
<p>Unless previously set with <a class="el" href="#abba9d66851f27f8cc4fc6511551b8092" title="Sets the number of rows to fetch from the database.">ResultSet_setFetchSize()</a>, the returned value is the same as returned by <a class="el" href="Connection_8h.html#ac26356b1b7ea3b23edb4f26b327f0dbe" title="Gets the number of rows to fetch for ResultSet objects.">Connection_getFetchSize()</a></p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The number of rows to fetch or 0 if N/A </dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="Connection_8h.html#ac26356b1b7ea3b23edb4f26b327f0dbe" title="Gets the number of rows to fetch for ResultSet objects.">Connection_getFetchSize</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3">◆ </a></span>ResultSet_next()</h2>
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<td class="memname">bool ResultSet_next </td>
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<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span></td><td>)</td>
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<p>Moves the cursor to the next row. </p>
<p>A ResultSet cursor is initially positioned before the first row; the first call to this method makes the first row the current row; the second call makes the second row the current row, and so on. When there are no more available rows false is returned. An empty ResultSet will return false on the first call to <a class="el" href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3" title="Moves the cursor to the next row.">ResultSet_next()</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>true if the new current row is valid; false if there are no more rows </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs </td></tr>
</table>
</dd>
</dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a7a402b4aa9f5c08dd5edd9ee97517673">◆ </a></span>ResultSet_isnull()</h2>
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<td class="memname">bool ResultSet_isnull </td>
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<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>columnIndex</em></span> )</td>
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<p>Checks if the designated column's value is SQL NULL. </p>
<p>If the column value is SQL NULL, a ResultSet returns the NULL for reference types and 0 for value types. Use this method if you need to differentiate between SQL NULL and the value NULL/0.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnIndex</td><td>The first column is 1, the second is 2, ... </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>true if column value is SQL NULL, false otherwise </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs or columnIndex is outside the valid range </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#ac65ad967dcaad62aa13d166c446e8f58">◆ </a></span>ResultSet_getString()</h2>
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<td class="memname">const char * ResultSet_getString </td>
<td>(</td>
<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<p>Gets the designated column's value as a C-string. </p>
<p><em>The returned string may only be valid until the next call to <a class="el" href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3" title="Moves the cursor to the next row.">ResultSet_next()</a> and if you plan to use the returned value longer, you must make a copy.</em></p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnIndex</td><td>The first column is 1, the second is 2, ... </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value; if the value is SQL NULL, the value returned is NULL </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs or columnIndex is outside the valid range </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a94f3683ed6ed1926d2b9013d5ffc8f82">◆ </a></span>ResultSet_getStringByName()</h2>
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<td class="memname">const char * ResultSet_getStringByName </td>
<td>(</td>
<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<td class="paramtype">const char *</td> <td class="paramname"><span class="paramname"><em>columnName</em></span> )</td>
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<p>Gets the designated column's value as a C-string. </p>
<p><em>The returned string may only be valid until the next call to <a class="el" href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3" title="Moves the cursor to the next row.">ResultSet_next()</a> and if you plan to use the returned value longer, you must make a copy.</em></p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnName</td><td>The SQL name of the column. <em>case-sensitive</em> </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value; if the value is SQL NULL, the value returned is NULL </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs or columnName does not exist </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#aa73672053b34ee50c21eac0783b28719">◆ </a></span>ResultSet_getInt()</h2>
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<td class="memname">int ResultSet_getInt </td>
<td>(</td>
<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<p>Gets the designated column's value as an int. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnIndex</td><td>The first column is 1, the second is 2, ... </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value; if the value is SQL NULL, the value returned is 0 </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs, columnIndex is outside the valid range or if the value is NaN </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a51563d2ce1e948806d34c0960f5d66dc">◆ </a></span>ResultSet_getIntByName()</h2>
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<td class="memname">int ResultSet_getIntByName </td>
<td>(</td>
<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<p>Gets the designated column's value as an int. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnName</td><td>The SQL name of the column. <em>case-sensitive</em> </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value; if the value is SQL NULL, the value returned is 0 </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs, columnName does not exist or if the value is NaN </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a5d3ed80bc1b5816f27e135a8e392aca7">◆ </a></span>ResultSet_getLLong()</h2>
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<td class="memname">long long ResultSet_getLLong </td>
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<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<p>Gets the designated column's value as a long long. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnIndex</td><td>The first column is 1, the second is 2, ... </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value; if the value is SQL NULL, the value returned is 0 </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs, columnIndex is outside the valid range or if the value is NaN </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#ab843c4ecf8d195d6449927bf7fb9defd">◆ </a></span>ResultSet_getLLongByName()</h2>
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<td class="memname">long long ResultSet_getLLongByName </td>
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<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<p>Gets the designated column's value as a long long. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnName</td><td>The SQL name of the column. <em>case-sensitive</em> </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value; if the value is SQL NULL, the value returned is 0 </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs, columnName does not exist or if the value is NaN </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#ab501755d054fea3bdab5de15a2259e9e">◆ </a></span>ResultSet_getDouble()</h2>
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<td class="memname">double ResultSet_getDouble </td>
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<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<p>Gets the designated column's value as a double. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnIndex</td><td>The first column is 1, the second is 2, ... </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value; if the value is SQL NULL, the value returned is 0.0 </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs, columnIndex is outside the valid range or if the value is NaN </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a38c392c208d0f6be4c6b4a29c624a367">◆ </a></span>ResultSet_getDoubleByName()</h2>
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<td class="memname">double ResultSet_getDoubleByName </td>
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<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<p>Gets the designated column's value as a double. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnName</td><td>The SQL name of the column. <em>case-sensitive</em> </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value; if the value is SQL NULL, the value returned is 0.0 </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs, columnName does not exist or if the value is NaN </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#adee072900d8136c0d6bd0596388f1e83">◆ </a></span>ResultSet_getBlob()</h2>
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<td class="memname">const void * ResultSet_getBlob </td>
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<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<td class="paramtype">int *</td> <td class="paramname"><span class="paramname"><em>size</em></span> )</td>
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<p>Gets the designated column's value as a void pointer. </p>
<p><em>The returned blob may only be valid until the next call to <a class="el" href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3" title="Moves the cursor to the next row.">ResultSet_next()</a> and if you plan to use the returned value longer, you must make a copy.</em></p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnIndex</td><td>The first column is 1, the second is 2, ... </td></tr>
<tr><td class="paramname">size</td><td>The number of bytes in the blob is stored in size </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value; if the value is SQL NULL, the value returned is NULL </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs or columnIndex is outside the valid range </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a08e197bc42a118e3cb2ca748b0525ec3">◆ </a></span>ResultSet_getBlobByName()</h2>
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<td class="memname">const void * ResultSet_getBlobByName </td>
<td>(</td>
<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<td class="paramtype">const char *</td> <td class="paramname"><span class="paramname"><em>columnName</em></span>, </td>
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<td class="paramtype">int *</td> <td class="paramname"><span class="paramname"><em>size</em></span> )</td>
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<p>Gets the designated column's value as a void pointer. </p>
<p><em>The returned blob may only be valid until the next call to <a class="el" href="#a771894bb8c0ddfd90ed6ed9c9c3e46b3" title="Moves the cursor to the next row.">ResultSet_next()</a> and if you plan to use the returned value longer, you must make a copy.</em></p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnName</td><td>The SQL name of the column. <em>case-sensitive</em> </td></tr>
<tr><td class="paramname">size</td><td>The number of bytes in the blob is stored in size </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value; if the value is SQL NULL, the value returned is NULL </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs or columnName does not exist </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<a id="a073df52b04dfbaaaf088baede0f770f5" name="a073df52b04dfbaaaf088baede0f770f5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a073df52b04dfbaaaf088baede0f770f5">◆ </a></span>ResultSet_getTimestamp()</h2>
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<td class="memname">time_t ResultSet_getTimestamp </td>
<td>(</td>
<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>columnIndex</em></span> )</td>
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<p>Gets the designated column's value as a Unix timestamp. </p>
<p>The returned value is in Coordinated Universal Time (UTC) and represents seconds since the <b>epoch</b> (January 1, 1970, 00:00:00 GMT).</p>
<p>Even though the underlying database might support timestamp ranges before the epoch and after '2038-01-19 03:14:07 UTC' it is safest not to assume or use values outside this range. Especially on a 32-bit system.</p>
<p><em>SQLite</em> does not have temporal SQL data types per se and using this method with SQLite assumes the column value in the Result Set to be either a numerical value representing a Unix Time in UTC which is returned as-is or an <a href="http://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a> time string which is converted to a <code>time_t</code> value.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnIndex</td><td>The first column is 1, the second is 2, ... </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value as seconds since the epoch in the GMT timezone. If the value is SQL NULL, the value returned is 0. </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs, if <code>columnIndex</code> is outside the range [1..<a class="el" href="#a74a9a4c55f9ff432e6cbb5c196627427" title="Gets the number of columns in this ResultSet.">ResultSet_getColumnCount()</a>] or if the column value cannot be converted to a valid timestamp </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> <a class="el" href="PreparedStatement_8h.html#a3cf4d848d41a7901727bccac2b58d31c" title="Sets the in parameter at index parameterIndex to the given Unix timestamp value.">PreparedStatement_setTimestamp</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a9d2d95be1cea80e6213967ce617f576f">◆ </a></span>ResultSet_getTimestampByName()</h2>
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<td class="memname">time_t ResultSet_getTimestampByName </td>
<td>(</td>
<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const char *</td> <td class="paramname"><span class="paramname"><em>columnName</em></span> )</td>
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<p>Gets the designated column's value as a Unix timestamp. </p>
<p>The returned value is in Coordinated Universal Time (UTC) and represents seconds since the <b>epoch</b> (January 1, 1970, 00:00:00 GMT).</p>
<p>Even though the underlying database might support timestamp ranges before the epoch and after '2038-01-19 03:14:07 UTC' it is safest not to assume or use values outside this range. Especially on a 32-bit system.</p>
<p><em>SQLite</em> does not have temporal SQL data types per se and using this method with SQLite assumes the column value in the Result Set to be either a numerical value representing a Unix Time in UTC which is returned as-is or an <a href="http://en.wikipedia.org/wiki/ISO_8601">ISO 8601</a> time string which is converted to a <code>time_t</code> value.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnName</td><td>The SQL name of the column. <em>case-sensitive</em> </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The column value as seconds since the epoch in the GMT timezone. If the value is SQL NULL, the value returned is 0. </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs, if <code>columnName</code> is not found or if the column value cannot be converted to a valid timestamp </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> <a class="el" href="PreparedStatement_8h.html#a3cf4d848d41a7901727bccac2b58d31c" title="Sets the in parameter at index parameterIndex to the given Unix timestamp value.">PreparedStatement_setTimestamp</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a98e618557d128694b2239c55f7618262">◆ </a></span>ResultSet_getDateTime()</h2>
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<td class="memname">struct tm ResultSet_getDateTime </td>
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<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>columnIndex</em></span> )</td>
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<p>Gets the designated column's value as a Date, Time or DateTime. </p>
<p>This method can be used to retrieve the value of columns with the SQL data type, Date, Time, DateTime or Timestamp. The returned <code>tm</code> structure follows the convention for usage with mktime(3) where:</p>
<ul>
<li>tm_hour = hours since midnight [0-23]</li>
<li>tm_min = minutes after the hour [0-59]</li>
<li>tm_sec = seconds after the minute [0-60]</li>
<li>tm_mday = day of the month [1-31]</li>
<li>tm_mon = months since January <b>[0-11]</b></li>
</ul>
<p>If the column value contains timezone information, tm_gmtoff is set to the offset from UTC in seconds, otherwise tm_gmtoff is set to 0. <em>On systems without tm_gmtoff, (Solaris), the member, tm_wday is set to gmt offset instead as this property is ignored by mktime on input.</em> The exception to the above is <b>tm_year</b> which contains the year literal and <em>not years since 1900</em> which is the convention. All other fields in the structure are set to zero. If the column type is DateTime or Timestamp all the fields mentioned above are set, if it is a Date or a Time, only the relevant fields are set.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnIndex</td><td>The first column is 1, the second is 2, ... </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>A tm structure with fields for date and time. If the value is SQL NULL, a zeroed tm structure is returned. Use <a class="el" href="#a7a402b4aa9f5c08dd5edd9ee97517673" title="Checks if the designated column's value is SQL NULL.">ResultSet_isnull()</a> if in doubt. </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs, if <code>columnIndex</code> is outside the range [1..<a class="el" href="#a74a9a4c55f9ff432e6cbb5c196627427" title="Gets the number of columns in this ResultSet.">ResultSet_getColumnCount()</a>] or if the column value cannot be converted to a valid SQL Date, Time or DateTime type </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a5733613fb15d5a4e614cb9157e4dd86f">◆ </a></span>ResultSet_getDateTimeByName()</h2>
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<td class="memname">struct tm ResultSet_getDateTimeByName </td>
<td>(</td>
<td class="paramtype"><a class="el" href="Connection_8h.html#a8dc1b239f8e305fbd1406ff041c89151">T</a></td> <td class="paramname"><span class="paramname"><em>R</em></span>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *</td> <td class="paramname"><span class="paramname"><em>columnName</em></span> )</td>
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<p>Gets the designated column's value as a Date, Time or DateTime. </p>
<p>This method can be used to retrieve the value of columns with the SQL data type, Date, Time, DateTime or Timestamp. The returned <code>tm</code> structure follows the convention for usage with mktime(3) where:</p>
<ul>
<li>tm_hour = hours since midnight [0-23]</li>
<li>tm_min = minutes after the hour [0-59]</li>
<li>tm_sec = seconds after the minute [0-60]</li>
<li>tm_mday = day of the month [1-31]</li>
<li>tm_mon = months since January <b>[0-11]</b></li>
</ul>
<p>If the column value contains timezone information, tm_gmtoff is set to the offset from UTC in seconds, otherwise tm_gmtoff is set to 0. <em>On systems without tm_gmtoff, (Solaris), the member, tm_wday is set to gmt offset instead as this property is ignored by mktime on input.</em> The exception to the above is <b>tm_year</b> which contains the year literal and <em>not years since 1900</em> which is the convention. All other fields in the structure are set to zero. If the column type is DateTime or Timestamp all the fields mentioned above are set, if it is a Date or a Time, only the relevant fields are set.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">R</td><td>A ResultSet object </td></tr>
<tr><td class="paramname">columnName</td><td>The SQL name of the column. <em>case-sensitive</em> </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>A tm structure with fields for date and time. If the value is SQL NULL, a zeroed tm structure is returned. Use <a class="el" href="#a7a402b4aa9f5c08dd5edd9ee97517673" title="Checks if the designated column's value is SQL NULL.">ResultSet_isnull()</a> if in doubt. </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">SQLException</td><td>If a database access error occurs, if <code>columnName</code> is not found or if the column value cannot be converted to a valid SQL Date, Time or DateTime type </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="SQLException_8h.html" title="Signals that an SQL specific exception has occurred.">SQLException.h</a> </dd></dl>
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