mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-18 13:57:03 +08:00
118 lines
13 KiB
HTML
118 lines
13 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<head>
|
|
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
|
|
<title>Returns result set metadata from a prepared statement</title>
|
|
</head>
|
|
<body class="docs"><div id="layout">
|
|
<div id="layout-content"><div id="function.maxdb-stmt-result-metadata" class="refentry">
|
|
<div class="refnamediv">
|
|
<h1 class="refname">maxdb_stmt_result_metadata</h1>
|
|
<h1 class="refname">maxdb_stmt::result_metadata</h1>
|
|
<p class="verinfo">(PECL maxdb >= 1.0)</p><p class="refpurpose"><span class="refname">maxdb_stmt_result_metadata</span> -- <span class="refname">maxdb_stmt::result_metadata</span> — <span class="dc-title">Returns result set metadata from a prepared statement</span></p>
|
|
|
|
</div>
|
|
|
|
<div class="refsect1 description" id="refsect1-function.maxdb-stmt-result-metadata-description">
|
|
<h3 class="title">说明</h3>
|
|
<p class="para">过程化风格</p>
|
|
<div class="methodsynopsis dc-description">
|
|
<span class="methodname"><strong>maxdb_stmt_result_metadata</strong></span>
|
|
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$stmt</code></span>
|
|
) : <span class="type">resource</span></div>
|
|
|
|
<p class="para rdfs-comment">面向对象风格</p>
|
|
<div class="methodsynopsis dc-description">
|
|
<span class="methodname"><strong>maxdb_stmt::result_metadata</strong></span>
|
|
( <span class="methodparam">void</span>
|
|
) : <span class="type">resource</span></div>
|
|
|
|
<p class="para rdfs-comment">
|
|
If a statement passed to <span class="function"><a href="maxdb_prepare.html" class="function">maxdb_prepare()</a></span> is one that produces
|
|
a result set, <span class="function"><strong>maxdb_stmt_result_metadata()</strong></span> returns the result resource
|
|
that can be used to process the meta information such as total number of fields
|
|
and individual field information.
|
|
</p>
|
|
<blockquote class="note"><p><strong class="note">Note</strong>:
|
|
<p class="para">This result set pointer can be passed as an argument to any of the
|
|
field-based functions that process result set metadata, such as:
|
|
<ul class="itemizedlist">
|
|
<li class="listitem"><p class="para"><span class="function"><a href="maxdb_num_fields.html" class="function">maxdb_num_fields()</a></span></p></li>
|
|
<li class="listitem"><p class="para"><span class="function"><a href="maxdb_fetch_field.html" class="function">maxdb_fetch_field()</a></span></p></li>
|
|
<li class="listitem"><p class="para"><span class="function"><a href="maxdb_fetch_field_direct.html" class="function">maxdb_fetch_field_direct()</a></span></p></li>
|
|
<li class="listitem"><p class="para"><span class="function"><a href="maxdb_fetch_fields.html" class="function">maxdb_fetch_fields()</a></span></p></li>
|
|
<li class="listitem"><p class="para"><span class="function"><a href="maxdb_field_count.html" class="function">maxdb_field_count()</a></span></p></li>
|
|
<li class="listitem"><p class="para"><span class="function"><a href="maxdb_field_seek.html" class="function">maxdb_field_seek()</a></span></p></li>
|
|
<li class="listitem"><p class="para"><span class="function"><a href="maxdb_field_tell.html" class="function">maxdb_field_tell()</a></span></p></li>
|
|
<li class="listitem"><p class="para"><span class="function"><a href="maxdb_free_result.html" class="function">maxdb_free_result()</a></span></p></li>
|
|
</ul>
|
|
</p>
|
|
</p></blockquote>
|
|
<p class="para">
|
|
The result set structure should be freed when you are done with it,
|
|
which you can do by passing it to <span class="function"><a href="maxdb_free_result.html" class="function">maxdb_free_result()</a></span>
|
|
</p>
|
|
<blockquote class="note"><p><strong class="note">Note</strong>:
|
|
<p class="para">
|
|
The result set returned by <span class="function"><strong>maxdb_stmt_result_metadata()</strong></span> contains only
|
|
metadata. It does not contain any row results. The rows are obtained by using the
|
|
statement handle with <span class="function"><a href="maxdb_fetch.html" class="function">maxdb_fetch()</a></span>.
|
|
</p>
|
|
</p></blockquote>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 returnvalues" id="refsect1-function.maxdb-stmt-result-metadata-returnvalues">
|
|
<h3 class="title">返回值</h3>
|
|
<p class="para">
|
|
<span class="function"><strong>maxdb_stmt_result_metadata()</strong></span> returns a result resource or <strong><code>FALSE</code></strong> if
|
|
an error occurred.
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 examples" id="refsect1-function.maxdb-stmt-result-metadata-examples">
|
|
<h3 class="title">范例</h3>
|
|
<p class="para">
|
|
<div class="example" id="example-1431">
|
|
<p><strong>Example #1 面向对象风格</strong></p>
|
|
<div class="example-contents">
|
|
<div class="phpcode"><pre><span style="color: #000000">
|
|
<span style="color: #0000BB"><?php<br />$maxdb </span><span style="color: #007700">= new </span><span style="color: #0000BB">maxdb</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"CREATE TABLE temp.friends (id int, name varchar(20))"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"INSERT INTO temp.friends VALUES (1,'Hartmut')"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"INSERT INTO temp.friends VALUES (2, 'Ulf')"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">prepare</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT id, name FROM temp.friends"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$stmt</span><span style="color: #007700">-></span><span style="color: #0000BB">execute</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/* get resultset for metadata */<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">$stmt</span><span style="color: #007700">-></span><span style="color: #0000BB">result_metadata</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/* retrieve field information from metadata result set */<br /></span><span style="color: #0000BB">$field </span><span style="color: #007700">= </span><span style="color: #0000BB">$result</span><span style="color: #007700">-></span><span style="color: #0000BB">fetch_field</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Fieldname: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$field</span><span style="color: #007700">-></span><span style="color: #0000BB">name</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* close resultset */<br /></span><span style="color: #0000BB">$result</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span>
|
|
</span>
|
|
</pre></div>
|
|
</div>
|
|
|
|
</div>
|
|
<div class="example" id="example-1432">
|
|
<p><strong>Example #2 过程化风格</strong></p>
|
|
<div class="example-contents">
|
|
<div class="phpcode"><pre><span style="color: #000000">
|
|
<span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">maxdb_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #DD0000">"CREATE TABLE temp.friends (id int, name varchar(20))"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">maxdb_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #DD0000">"INSERT INTO temp.friends VALUES (1,'Hartmut')"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">maxdb_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #DD0000">"INSERT INTO temp.friends VALUES (2, 'Ulf')"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_prepare</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #DD0000">"SELECT id, name FROM temp.friends"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">maxdb_stmt_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* get resultset for metadata */<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_stmt_result_metadata</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* retrieve field information from metadata result set */<br /></span><span style="color: #0000BB">$field </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_fetch_field</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Fieldname: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$field</span><span style="color: #007700">-></span><span style="color: #0000BB">name</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* close resultset */<br /></span><span style="color: #0000BB">maxdb_free_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">maxdb_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
|
|
</span>
|
|
</pre></div>
|
|
</div>
|
|
|
|
</div>
|
|
</p>
|
|
<p class="para">以上例程的输出类似于：</p>
|
|
<div class="example-contents screen">
|
|
<div class="cdata"><pre>
|
|
Fieldname: ID
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 seealso" id="refsect1-function.maxdb-stmt-result-metadata-seealso">
|
|
<h3 class="title">参见</h3>
|
|
<p class="para">
|
|
<ul class="simplelist">
|
|
<li class="member"><span class="function"><a href="maxdb_prepare.html" class="function" rel="rdfs-seeAlso">maxdb_prepare()</a> - Prepare an SQL statement for execution</span></li>
|
|
<li class="member"><span class="function"><a href="maxdb_free_result.html" class="function" rel="rdfs-seeAlso">maxdb_free_result()</a> - Frees the memory associated with a result</span></li>
|
|
</ul>
|
|
</p>
|
|
</div>
|
|
|
|
|
|
</div></div></div></body></html> |