group__easy.html

Linux下的操作oracle数据库的连接库

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<p>
Counts the number of items in the table. 
<p>
Counts the number of items where field = value [AND where]<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign=top><em>dbh</em>&nbsp;</td><td>I - A database handle </td></tr>
    <tr><td valign=top><em>table</em>&nbsp;</td><td>I - A table name </td></tr>
    <tr><td valign=top><em>colname</em>&nbsp;</td><td>I - A column name </td></tr>
    <tr><td valign=top><em>colval</em>&nbsp;</td><td>I - A column value </td></tr>
    <tr><td valign=top><em>where</em>&nbsp;</td><td>I - More conditions (optional)</td></tr>
  </table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd><ul>
<li>
SQLO_SUCCESS </li>
<li>
SQLO_NO_DATA </li>
<li>
&lt; 0 on error </li>
</ul>
</dd></dl>
<dl compact><dt><b>Example:</b></dt><dd><div class="fragment"><pre><span class="comment">/* $Id: ex2.c,v 1.4 2002/08/24 12:54:47 kpoitschke Exp $ */</span>
<span class="preprocessor">#include &lt;stdio.h&gt;</span>
<span class="preprocessor">#include &lt;stdlib.h&gt;</span>
<span class="preprocessor">#include "examples.h"</span>

<span class="keywordtype">int</span> col_count(<a class="code" href="group__typedefs.html#ga0">sqlo_db_handle_t</a> dbh, <span class="keywordtype">char</span> * table_name)
{
  <span class="keywordtype">int</span> stat;
  <span class="keywordflow">if</span> ( 0 &gt; (stat = <a class="code" href="group__easy.html#ga161">sqlo_count</a>(dbh, <span class="stringliteral">"USER_TAB_COLUMNS"</span>, <span class="stringliteral">"TABLE_NAME"</span>, table_name, NULL))) {
    error_exit(dbh, <span class="stringliteral">"sqlo_count"</span>);
  }
  <span class="keywordflow">return</span> stat;
}

<span class="comment">/* $Id: ex2.c,v 1.4 2002/08/24 12:54:47 kpoitschke Exp $ */</span>
</pre></div> </dd></dl>

<p>
Definition at line <a class="el" href="sqlora_8c-source.html#l04902">4902</a> of file <a class="el" href="sqlora_8c-source.html">sqlora.c</a>.
<p>
References <a class="el" href="sqlora_8c-source.html#l04319">_get_trace_fp()</a>, <a class="el" href="sqlora_8c-source.html#l00340">CHECK_DBHANDLE</a>, <a class="el" href="sqlora_8c-source.html#l00416">CHECK_OCI_STATUS_RETURN</a>, <a class="el" href="sqlora_8c-source.html#l00495">_sqlo_db_struct::errmsg</a>, <a class="el" href="sqlora_8c-source.html#l05656">sqlo_close()</a>, <a class="el" href="sqlora_8c.html#a30">sqlo_db_struct_ptr_t</a>, <a class="el" href="group__constants.html#gga3a26">SQLO_ERROR</a>, <a class="el" href="sqlora_8c-source.html#l05367">sqlo_fetch()</a>, <a class="el" href="group__constants.html#gga4a34">SQLO_INVALID_DB_HANDLE</a>, <a class="el" href="sqlora_8c-source.html#l05238">sqlo_open2()</a>, <a class="el" href="group__constants.html#gga3a28">SQLO_STILL_EXECUTING</a>, <a class="el" href="sqlora_8h-source.html#l00318">sqlo_stmt_handle_t</a>, <a class="el" href="group__constants.html#gga3a25">SQLO_SUCCESS</a>, <a class="el" href="sqlora_8c-source.html#l05454">sqlo_values()</a>, and <a class="el" href="sqlora_8c-source.html#l00238">TRACE</a>.    </td>
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Here is the call graph for this function:<p><center><img src="group__easy_ga1_cgraph.png" border="0" usemap="#group__easy_ga1_cgraph_map" alt=""></center>
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<a class="anchor" name="ga15" doxytag="sqlora.h::sqlo_exec" ></a><p>
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          <td class="md" nowrap valign="top"> int sqlo_exec </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__typedefs.html#ga0">sqlo_db_handle_t</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>dbh</em>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>const char *&nbsp;</td>
          <td class="mdname" nowrap> <em>stmt</em></td>
        </tr>
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          <td></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"></td>
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<p>
Execute a simple sql statement. 
<p>
Use this to execute non-qeuery statements without bind variables.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign=top><em>dbh</em>&nbsp;</td><td>A database handle </td></tr>
    <tr><td valign=top><em>stmt</em>&nbsp;</td><td>A sql statement</td></tr>
  </table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>The number of processed rows (DML statements), 0 (non DML statements) or &lt; 0 on error.</dd></dl>
<dl compact><dt><b>Example: </b></dt><dd><div class="fragment"><pre><span class="comment">/* $Id: ex8.c,v 1.4 2002/08/24 12:54:47 kpoitschke Exp $ */</span>
<span class="preprocessor">#include &lt;stdio.h&gt;</span>
<span class="preprocessor">#include &lt;stdlib.h&gt;</span>
<span class="preprocessor">#include "examples.h"</span>

<span class="keywordtype">int</span> update_emp(<a class="code" href="group__typedefs.html#ga0">sqlo_db_handle_t</a> dbh, <span class="keywordtype">double</span> factor, <span class="keyword">const</span> <span class="keywordtype">char</span> * job)
{
  <span class="keywordtype">int</span> stat;
  <span class="keywordtype">char</span> stmt[1024];

  sprintf(stmt, <span class="stringliteral">"UPDATE EMP SET SAL = SAL * %f WHERE JOB = '%s'"</span>,
          factor, job);

  <span class="keywordflow">if</span> ( 0 &gt; (stat = <a class="code" href="group__easy.html#ga163">sqlo_exec</a>(dbh, stmt)))
    error_exit(dbh, <span class="stringliteral">"sqlo_run"</span>);

  <span class="keywordflow">return</span> stat;                  <span class="comment">/* number of processed rows */</span>
}

<span class="comment">/* $Id: ex8.c,v 1.4 2002/08/24 12:54:47 kpoitschke Exp $ */</span>

</pre></div></dd></dl>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__easy.html#ga2">sqlo_run</a> </dd></dl>

<p>
Definition at line <a class="el" href="sqlora_8c-source.html#l05046">5046</a> of file <a class="el" href="sqlora_8c-source.html">sqlora.c</a>.
<p>
References <a class="el" href="sqlora_8c-source.html#l04319">_get_trace_fp()</a>, <a class="el" href="sqlora_8c-source.html#l00340">CHECK_DBHANDLE</a>, <a class="el" href="sqlora_8c-source.html#l00416">CHECK_OCI_STATUS_RETURN</a>, <a class="el" href="sqlora_8c-source.html#l00489">_sqlo_db_struct::envhp</a>, <a class="el" href="sqlora_8c-source.html#l00483">_sqlo_db_struct::errhp</a>, <a class="el" href="sqlora_8c.html#a30">sqlo_db_struct_ptr_t</a>, <a class="el" href="group__constants.html#gga4a34">SQLO_INVALID_DB_HANDLE</a>, <a class="el" href="group__constants.html#gga3a28">SQLO_STILL_EXECUTING</a>, <a class="el" href="sqlora_8c-source.html#l00493">_sqlo_db_struct::status</a>, <a class="el" href="sqlora_8c-source.html#l00500">_sqlo_db_struct::stmthp</a>, <a class="el" href="sqlora_8c-source.html#l00485">_sqlo_db_struct::svchp</a>, and <a class="el" href="sqlora_8c-source.html#l00238">TRACE</a>.
<p>
Referenced by <a class="el" href="sqlora_8c-source.html#l04733">sqlo_trace()</a>.    </td>
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Here is the call graph for this function:<p><center><img src="group__easy_ga15_cgraph.png" border="0" usemap="#group__easy_ga15_cgraph_map" alt=""></center>
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<a class="anchor" name="ga0" doxytag="sqlora.h::sqlo_exists" ></a><p>
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          <td class="md" nowrap valign="top"> int sqlo_exists </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__typedefs.html#ga0">sqlo_db_handle_t</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>dbh</em>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>const char *&nbsp;</td>
          <td class="mdname" nowrap> <em>table</em>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>const char *&nbsp;</td>
          <td class="mdname" nowrap> <em>colname</em>, </td>
        </tr>
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          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>const char *&nbsp;</td>
          <td class="mdname" nowrap> <em>colval</em>, </td>
        </tr>
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          <td class="md" nowrap align="right"></td>
          <td></td>
          <td class="md" nowrap>const char *&nbsp;</td>
          <td class="mdname" nowrap> <em>where</em></td>
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          <td></td>
          <td class="md">)&nbsp;</td>
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