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166 lines
15 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Sets the result set pointer to the next row or requested row</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.db2-fetch-row" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">db2_fetch_row</h1>
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<p class="verinfo">(PECL ibm_db2 >= 1.0.0)</p><p class="refpurpose"><span class="refname">db2_fetch_row</span> — <span class="dc-title">
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Sets the result set pointer to the next row or requested row
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</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.db2-fetch-row-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>db2_fetch_row</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$stmt</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$row_number</code></span>
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] ) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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Use <span class="function"><strong>db2_fetch_row()</strong></span> to iterate through a result set, or
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to point to a specific row in a result set if you requested a scrollable
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cursor.
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</p>
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<p class="para">
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To retrieve individual fields from the result set, call the
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<span class="function"><a href="db2_result.html" class="function">db2_result()</a></span> function.
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</p>
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<p class="para">
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Rather than calling <span class="function"><strong>db2_fetch_row()</strong></span> and
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<span class="function"><a href="db2_result.html" class="function">db2_result()</a></span>, most applications will call one of
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<span class="function"><a href="db2_fetch_assoc.html" class="function">db2_fetch_assoc()</a></span>, <span class="function"><a href="db2_fetch_both.html" class="function">db2_fetch_both()</a></span>,
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or <span class="function"><a href="db2_fetch_array.html" class="function">db2_fetch_array()</a></span> to advance the result set pointer
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and return a complete row as an array.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.db2-fetch-row-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">stmt</code></dt>
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<dd>
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<p class="para">
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A valid <em>stmt</em> resource.
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</p>
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</dd>
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<dt>
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<code class="parameter">row_number</code></dt>
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<dd>
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<p class="para">
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With scrollable cursors, you can request a specific row number in the
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result set. Row numbering is 1-indexed.
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.db2-fetch-row-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns <strong><code>TRUE</code></strong> if the requested row exists in the result set. Returns
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<strong><code>FALSE</code></strong> if the requested row does not exist in the result set.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.db2-fetch-row-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-1260">
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<p><strong>Example #1 Iterating through a result set</strong></p>
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<div class="example-contents"><p>
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The following example demonstrates how to iterate through a result set
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with <span class="function"><strong>db2_fetch_row()</strong></span> and retrieve columns from the
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result set with <span class="function"><a href="db2_result.html" class="function">db2_result()</a></span>.
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</p></div>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$sql </span><span style="color: #007700">= </span><span style="color: #DD0000">'SELECT name, breed FROM animals WHERE weight < ?'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_prepare</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #0000BB">$sql</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">db2_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, array(</span><span style="color: #0000BB">10</span><span style="color: #007700">));<br />while (</span><span style="color: #0000BB">db2_fetch_row</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">$name </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$breed </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /> print </span><span style="color: #DD0000">"</span><span style="color: #0000BB">$name</span><span style="color: #DD0000"> </span><span style="color: #0000BB">$breed</span><span style="color: #DD0000">"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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cat Pook
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gold fish Bubbles
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budgerigar Gizmo
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goat Rickety Ride
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</pre></div>
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</div>
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</div>
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<div class="example" id="example-1261">
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<p><strong>Example #2 i5/OS recommended alternatives to db2_fetch_row/db2_result</strong></p>
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<div class="example-contents"><p>
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On i5/OS it is recommended that you use <span class="function"><a href="db2_fetch_both.html" class="function">db2_fetch_both()</a></span>,
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<span class="function"><a href="db2_fetch_array.html" class="function">db2_fetch_array()</a></span>, or <span class="function"><a href="db2_fetch_object.html" class="function">db2_fetch_object()</a></span>
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over <span class="function"><strong>db2_fetch_row()</strong></span>/<span class="function"><a href="db2_result.html" class="function">db2_result()</a></span>. In general
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<span class="function"><strong>db2_fetch_row()</strong></span>/<span class="function"><a href="db2_result.html" class="function">db2_result()</a></span> have more issues
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with various column types in <em>EBCIDIC</em> to <em>ASCII</em>
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translation, including possible truncation in <em>DBCS</em> applications.
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You may also find the performance of <span class="function"><a href="db2_fetch_both.html" class="function">db2_fetch_both()</a></span>,
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<span class="function"><a href="db2_fetch_array.html" class="function">db2_fetch_array()</a></span>, and <span class="function"><a href="db2_fetch_object.html" class="function">db2_fetch_object()</a></span> to
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be superior to <span class="function"><strong>db2_fetch_row()</strong></span>/<span class="function"><a href="db2_result.html" class="function">db2_result()</a></span>.
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</p></div>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /> $conn </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">""</span><span style="color: #007700">,</span><span style="color: #DD0000">""</span><span style="color: #007700">,</span><span style="color: #DD0000">""</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$sql </span><span style="color: #007700">= </span><span style="color: #DD0000">'SELECT SPECIFIC_SCHEMA, SPECIFIC_NAME, ROUTINE_SCHEMA, ROUTINE_NAME, ROUTINE_TYPE, ROUTINE_CREATED, ROUTINE_BODY, IN_PARMS, OUT_PARMS, INOUT_PARMS, PARAMETER_STYLE, EXTERNAL_NAME, EXTERNAL_LANGUAGE FROM QSYS2.SYSROUTINES FETCH FIRST 2 ROWS ONLY'</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_exec</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #0000BB">$sql</span><span style="color: #007700">, array(</span><span style="color: #DD0000">'cursor' </span><span style="color: #007700">=> </span><span style="color: #0000BB">DB2_SCROLLABLE</span><span style="color: #007700">));<br /> while (</span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_fetch_both</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">)){<br /> echo </span><span style="color: #DD0000">"<br>db2_fetch_both </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #DD0000">'SPECIFIC_NAME'</span><span style="color: #007700">]}</span><span style="color: #DD0000"> </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #DD0000">'ROUTINE_CREATED'</span><span style="color: #007700">]}</span><span style="color: #DD0000"> </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">5</span><span style="color: #007700">]}</span><span style="color: #DD0000">"</span><span style="color: #007700">;<br /> }<br /> </span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_exec</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #0000BB">$sql</span><span style="color: #007700">, array(</span><span style="color: #DD0000">'cursor' </span><span style="color: #007700">=> </span><span style="color: #0000BB">DB2_SCROLLABLE</span><span style="color: #007700">));<br /> while (</span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_fetch_array</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">)){<br /> echo </span><span style="color: #DD0000">"<br>db2_fetch_array </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]}</span><span style="color: #DD0000"> </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">5</span><span style="color: #007700">]}</span><span style="color: #DD0000">"</span><span style="color: #007700">;<br /> }<br /> </span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_exec</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #0000BB">$sql</span><span style="color: #007700">, array(</span><span style="color: #DD0000">'cursor' </span><span style="color: #007700">=> </span><span style="color: #0000BB">DB2_SCROLLABLE</span><span style="color: #007700">));<br /> while (</span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_fetch_object</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">)){<br /> echo </span><span style="color: #DD0000">"<br>db2_fetch_object </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">-></span><span style="color: #0000BB">SPECIFIC_NAME</span><span style="color: #007700">}</span><span style="color: #DD0000"> </span><span style="color: #007700">{</span><span style="color: #0000BB">$row</span><span style="color: #007700">-></span><span style="color: #0000BB">ROUTINE_CREATED</span><span style="color: #007700">}</span><span style="color: #DD0000">"</span><span style="color: #007700">;<br /> }<br /> </span><span style="color: #0000BB">db2_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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db2_fetch_both MATCH_ANIMAL 2006-08-25-17.10.23.775000 2006-08-25-17.10.23.775000
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db2_fetch_both MULTIRESULTS 2006-10-17-10.11.05.308000 2006-10-17-10.11.05.308000
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db2_fetch_array MATCH_ANIMAL 2006-08-25-17.10.23.775000
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db2_fetch_array MULTIRESULTS 2006-10-17-10.11.05.308000
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db2_fetch_object MATCH_ANIMAL 2006-08-25-17.10.23.775000
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db2_fetch_object MULTIRESULTS 2006-10-17-10.11.05.308000
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.db2-fetch-row-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="db2_fetch_array.html" class="function" rel="rdfs-seeAlso">db2_fetch_array()</a> - Returns an array, indexed by column position, representing a row in a result set</span></li>
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<li class="member"><span class="function"><a href="db2_fetch_assoc.html" class="function" rel="rdfs-seeAlso">db2_fetch_assoc()</a> - Returns an array, indexed by column name, representing a row in a result set</span></li>
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<li class="member"><span class="function"><a href="db2_fetch_both.html" class="function" rel="rdfs-seeAlso">db2_fetch_both()</a> - Returns an array, indexed by both column name and position, representing a row in a result set</span></li>
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<li class="member"><span class="function"><a href="db2_fetch_object.html" class="function" rel="rdfs-seeAlso">db2_fetch_object()</a> - Returns an object with properties representing columns in the fetched row</span></li>
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<li class="member"><span class="function"><a href="db2_result.html" class="function" rel="rdfs-seeAlso">db2_result()</a> - Returns a single column from a row in the result set</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |