group__lob.html
来自「一个很好用的Linux/Unix下Oracle OCI开发接口封装库」· HTML 代码 · 共 1,040 行 · 第 1/4 页
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<tr><td valign=top><em>piece</em> </td><td>
I - The piece indicator <ul>
<li>SQLO_ONE_PIECE <li>SQLO_FIRST_PIECE <li>SQLO_NEXT_PIECE <li>SQLO_LAST_PIECE </ul>
</td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
<ul>
<li>SQLO_SUCCESS <li>SQLO_STILL_EXECUTING <li>SQLO_ERROR </ul>
</dl><dl compact><dt><b>Since: </b></dt><dd>
Version 2.2 </dl><dl compact><dt><b>Example:</b></dt><dd>
<div class="fragment"><pre><span class="comment">/* $Id: group__lob.html,v 1.1 2005/01/13 02:56:43 cvsroot Exp $ */</span>
<span class="preprocessor">#include <stdio.h></span>
<span class="preprocessor">#include <stdlib.h></span>
<span class="preprocessor">#include "examples.h"</span>
<span class="keywordtype">int</span> insert_into_blob_table(<a class="code" href="group__typedefs.html#a0">sqlo_db_handle_t</a> dbh, <span class="keywordtype">int</span> key )
{
<span class="keywordtype">char</span> * stmt =
<span class="stringliteral">"INSERT INTO T_SQLORA_BLOB (KEY, CDATA) "</span>
<span class="stringliteral">"VALUES (:b1, EMPTY_CLOB()) RETURNING CDATA INTO :b2"</span>;
<span class="keywordtype">char</span> data[MAX_BLOB_BUFFER_DATA]; <span class="comment">/* a data buffer */</span>
<a class="code" href="group__typedefs.html#a2">sqlo_lob_desc_t</a> loblp; <span class="comment">/* the lob locator */</span>
<a class="code" href="group__typedefs.html#a1">sqlo_stmt_handle_t</a> sth;
<span class="keywordtype">int</span> status;
<span class="keywordtype">int</span> k = key;
<span class="comment">/* create the test table */</span>
create_blob_table(dbh);
<span class="comment">/* fill the data buffer with some characters */</span>
fillbuf(data, MAX_BLOB_BUFFER_DATA);
<span class="comment">/* parse the statement */</span>
<span class="keywordflow">if</span> (0>(sth = <a class="code" href="group__complex.html#a0">sqlo_prepare</a>(dbh, stmt)))
error_exit(dbh, <span class="stringliteral">"sqlo_prepare"</span>);
<span class="comment">/* alloate the lob descriptor */</span>
<span class="keywordflow">if</span> (0 > <a class="code" href="group__lob.html#a0">sqlo_alloc_lob_desc</a>(dbh, &loblp))
error_exit(dbh, <span class="stringliteral">"sqlo_alloc_lob_desc"</span>);
<span class="comment">/* bind input variables. Note: we bind the lob descriptor here */</span>
<span class="keywordflow">if</span> (<a class="code" href="group__constants.html#a3a25">SQLO_SUCCESS</a> !=
(<a class="code" href="group__complex.html#a3">sqlo_bind_by_pos</a>(sth, 1, <a class="code" href="group__constants.html#a6a56">SQLOT_INT</a>, &k, <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>), NULL, 0)) ||
(<a class="code" href="group__complex.html#a3">sqlo_bind_by_pos</a>(sth, 2, <a class="code" href="group__constants.html#a6a81">SQLOT_CLOB</a>, &loblp, 0, NULL, 0))
) {
<a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &loblp);
error_exit(dbh, <span class="stringliteral">"sqlo_bind_by_pos"</span>);
}
<span class="comment">/* execute the statement */</span>
status = <a class="code" href="group__complex.html#a8">sqlo_execute</a>(sth, 1);
<span class="keywordflow">if</span> (<a class="code" href="group__constants.html#a3a25">SQLO_SUCCESS</a> != status) {
<a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &loblp);
error_exit(dbh, <span class="stringliteral">"sqlo_execute"</span>);
}
<span class="comment">/* write the lob */</span>
status = <a class="code" href="group__lob.html#a2">sqlo_lob_write_buffer</a>(dbh, loblp, MAX_BLOB_BUFFER_DATA, data,
MAX_BLOB_BUFFER_DATA, <a class="code" href="group__constants.html#a5a50">SQLO_ONE_PIECE</a>);
<span class="keywordflow">if</span> (status < 0) {
<a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &loblp);
error_exit(dbh, <span class="stringliteral">"sqlo_log_write_buffer"</span>);
}
<a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &loblp);
<a class="code" href="group__easy.html#a13">sqlo_close</a>(sth);
<span class="keywordflow">return</span> (1);
}
<span class="keywordtype">void</span> create_blob_table(<a class="code" href="group__typedefs.html#a0">sqlo_db_handle_t</a> dbh)
{
<span class="keywordtype">char</span> * stmt=
<span class="stringliteral">"CREATE TABLE T_SQLORA_BLOB (KEY INTEGER, CDATA CLOB, BDATA BLOB)"</span>;
<span class="keywordflow">if</span> (<a class="code" href="group__constants.html#a3a25">SQLO_SUCCESS</a> != <a class="code" href="group__easy.html#a14">sqlo_exec</a>(dbh, stmt))
<span class="keywordflow">if</span> (<a class="code" href="group__error.html#a1">sqlo_geterrcode</a>(dbh) != 955) <span class="comment">/* table exists already */</span>
error_exit(dbh, <span class="stringliteral">"sqlo_exec"</span>);
}
<span class="keywordtype">void</span> drop_blob_table(<a class="code" href="group__typedefs.html#a0">sqlo_db_handle_t</a> dbh)
{
<span class="keywordtype">char</span> * stmt = <span class="stringliteral">"DROP TABLE T_SQLORA_BLOB"</span>;
<span class="keywordflow">if</span> (<a class="code" href="group__constants.html#a3a25">SQLO_SUCCESS</a> != <a class="code" href="group__easy.html#a14">sqlo_exec</a>(dbh, stmt))
error_exit(dbh, <span class="stringliteral">"sqlo_exec"</span>);
}
<span class="keywordtype">void</span> fillbuf(<span class="keywordtype">char</span> * data, <span class="keywordtype">int</span> len)
{
<span class="keywordtype">int</span> i;
<span class="keywordflow">for</span> (i = 0; i < len; ++i) {
data[i] = <span class="charliteral">'A'</span> + i % 26;
}
}
<span class="comment">/* $Id */</span>
</pre></div> </dl><dl compact><dt><b>Examples: </b></dt><dd>
<a class="el" href="ex13_8c-example.html#a5">ex13.c</a>.</dl> </td>
</tr>
</table>
<a name="a4" doxytag="sqlora.h::sqlo_lob_write_stream"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int sqlo_lob_write_stream </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group__typedefs.html#a0">sqlo_db_handle_t</a> </td>
<td class="mdname" nowrap> <em>dbh</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap><a class="el" href="group__typedefs.html#a2">sqlo_lob_desc_t</a> </td>
<td class="mdname" nowrap> <em>loblp</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>unsigned int </td>
<td class="mdname" nowrap> <em>filelen</em>, </td>
</tr>
<tr>
<td></td>
<td></td>
<td class="md" nowrap>FILE * </td>
<td class="mdname" nowrap> <em>fp</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Write lob data from a file into the lob column.
<p>
This function reads the data from the stream and writes it into the lob column via <a class="el" href="group__lob.html#a2">Functions to insert/select LOBs</a>.
<p>
<dl compact><dt><b>Attention: </b></dt><dd>
The function does not close or rewind the fp.</dl><dl compact><dt><b>Parameters: </b></dt><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>dbh</em> </td><td>
I - A database handle. </td></tr>
<tr><td valign=top><em>loblp</em> </td><td>
I - A lob locator. </td></tr>
<tr><td valign=top><em>filelen</em> </td><td>
I - The size of the file (total lob length) </td></tr>
<tr><td valign=top><em>fp</em> </td><td>
I - The filepointer</td></tr>
</table>
</dl><dl compact><dt><b>Returns: </b></dt><dd>
<ul>
<li>SQLO_SUCCESS <li>SQLO_ERROR </ul>
</dl><dl compact><dt><b>Since: </b></dt><dd>
Version 2.2 </dl><dl compact><dt><b>Example:</b></dt><dd>
<div class="fragment"><pre><span class="comment">/* $Id: group__lob.html,v 1.1 2005/01/13 02:56:43 cvsroot Exp $ */</span>
<span class="preprocessor">#include <stdio.h></span>
<span class="preprocessor">#include <stdlib.h></span>
<span class="preprocessor">#include "examples.h"</span>
<span class="keywordtype">int</span> insert_file_into_blob_table(<a class="code" href="group__typedefs.html#a0">sqlo_db_handle_t</a> dbh, <span class="keywordtype">int</span> key, <span class="keyword">const</span> <span class="keywordtype">char</span> * fname )
{
<span class="keywordtype">char</span> * stmt =
<span class="stringliteral">"INSERT INTO T_SQLORA_BLOB (KEY, BDATA) "</span>
<span class="stringliteral">"VALUES (:b1, EMPTY_BLOB()) RETURNING BDATA INTO :b2"</span>;
<a class="code" href="group__typedefs.html#a2">sqlo_lob_desc_t</a> loblp; <span class="comment">/* the lob locator */</span>
<a class="code" href="group__typedefs.html#a1">sqlo_stmt_handle_t</a> sth;
<span class="keywordtype">int</span> status;
FILE * fp;
<span class="keywordtype">unsigned</span> filelen;
<span class="keywordtype">short</span> ind;
<span class="keywordtype">int</span> k = key;
create_blob_table(dbh);
<span class="keywordflow">if</span> (! (fp = fopen(fname, <span class="stringliteral">"r"</span>))) {
printf(<span class="stringliteral">"ERROR: cannot open file %s\n"</span>, fname);
<span class="keywordflow">return</span> 0;
}
<span class="comment">/* determine file len */</span>
fseek(fp, 0, SEEK_END);
filelen = ftell(fp);
fseek(fp, 0, 0);
<span class="comment">/* parse */</span>
<span class="keywordflow">if</span> (0>(sth = <a class="code" href="group__complex.html#a0">sqlo_prepare</a>(dbh, stmt)))
error_exit(dbh, <span class="stringliteral">"sqlo_prepare"</span>);
<span class="comment">/* allocate the lob locator */</span>
<span class="keywordflow">if</span> (0 > <a class="code" href="group__lob.html#a0">sqlo_alloc_lob_desc</a>(dbh, &loblp))
error_exit(dbh, <span class="stringliteral">"sqlo_alloc_lob_desc"</span>);
<span class="comment">/* bind input variables */</span>
<span class="keywordflow">if</span> (<a class="code" href="group__constants.html#a3a25">SQLO_SUCCESS</a> !=
(<a class="code" href="group__complex.html#a3">sqlo_bind_by_pos</a>(sth, 1, <a class="code" href="group__constants.html#a6a56">SQLOT_INT</a>, &k, <span class="keyword">sizeof</span>(<span class="keywordtype">int</span>), NULL, 0)) ||
(<a class="code" href="group__complex.html#a3">sqlo_bind_by_pos</a>(sth, 2, <a class="code" href="group__constants.html#a6a82">SQLOT_BLOB</a>, &loblp, 0, &ind, 0))
) {
<a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &loblp);
error_exit(dbh, <span class="stringliteral">"sqlo_bind_by_pos"</span>);
}
<span class="comment">/* execute */</span>
status = <a class="code" href="group__complex.html#a8">sqlo_execute</a>(sth, 1);
<span class="keywordflow">if</span> (<a class="code" href="group__constants.html#a3a25">SQLO_SUCCESS</a> != status) {
<a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &loblp);
error_exit(dbh, <span class="stringliteral">"sqlo_execute"</span>);
}
<span class="comment">/* write the lob */</span>
status = <a class="code" href="group__lob.html#a4">sqlo_lob_write_stream</a>(dbh, loblp, filelen, fp);
<span class="keywordflow">if</span> (status < 0) {
<a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &loblp);
error_exit(dbh, <span class="stringliteral">"sqlo_lob_write_stream"</span>);
}
<a class="code" href="group__easy.html#a13">sqlo_close</a>(sth);
<a class="code" href="group__lob.html#a1">sqlo_free_lob_desc</a>(dbh, &loblp);
fclose(fp);
<span class="keywordflow">return</span> (1);
}
<span class="comment">/* $Id */</span>
</pre></div></dl><dl compact><dt><b>See also: </b></dt><dd>
<a class="el" href="group__lob.html#a2">sqlo_lob_write_buffer</a> </dl><dl compact><dt><b>Examples: </b></dt><dd>
<a class="el" href="ex14_8c-example.html#a5">ex14.c</a>.</dl> </td>
</tr>
</table>
<hr><address style="align: right;"><small>Generated on Thu Aug 14 18:02:53 2003 for libsqlora8 by
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