📄 function.db2-fetch-row.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Sets the result set pointer to the next row or requested row</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.db2-fetch-object.html">db2_fetch_object</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.db2-field-display-size.html">db2_field_display_size</a></div> <div class="up"><a href="ref.ibm-db2.html">IBM DB2 Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.db2-fetch-row" class="refentry"> <div class="refnamediv"> <h1 class="refname">db2_fetch_row</h1> <p class="verinfo">(PECL ibm_db2:1.0-1.6.2)</p><p class="refpurpose"><span class="refname">db2_fetch_row</span> — <span class="dc-title"> Sets the result set pointer to the next row or requested row </span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>db2_fetch_row</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$stmt</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$row_number</tt></span> ] )</div> <p class="para rdfs-comment"> Use <b>db2_fetch_row()</b> to iterate through a result set, or to point to a specific row in a result set if you requested a scrollable cursor. </p> <p class="para"> To retrieve individual fields from the result set, call the <a href="function.db2-result.html" class="function">db2_result()</a> function. </p> <p class="para"> Rather than calling <b>db2_fetch_row()</b> and <a href="function.db2-result.html" class="function">db2_result()</a>, most applications will call one of <a href="function.db2-fetch-assoc.html" class="function">db2_fetch_assoc()</a>, <a href="function.db2-fetch-both.html" class="function">db2_fetch_both()</a>, or <a href="function.db2-fetch-array.html" class="function">db2_fetch_array()</a> to advance the result set pointer and return a complete row as an array. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">stmt</tt></i></span> <dd> <p class="para"> A valid <i>stmt</i> resource. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">row_number</tt></i></span> <dd> <p class="para"> With scrollable cursors, you can request a specific row number in the result set. Row numbering is 1-indexed. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> if the requested row exists in the result set. Returns <b><tt>FALSE</tt></b> if the requested row does not exist in the result set. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 Iterating through a result set</b></p> <div class="example-contents"><p> The following example demonstrates how to iterate through a result set with <b>db2_fetch_row()</b> and retrieve columns from the result set with <a href="function.db2-result.html" class="function">db2_result()</a>. </p></div> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><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">"$name $breed"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>cat Pookgold fish Bubblesbudgerigar Gizmogoat Rickety Ride</pre></div> </pre></div> </div> <div class="example"> <p><b>Example #2 i5/OS recommended alternatives to db2_fetch_row/db2_result</b></p> <div class="example-contents"><p> On i5/OS it is recommended that you use <a href="function.db2-fetch-both.html" class="function">db2_fetch_both()</a>, <a href="function.db2-fetch-array.html" class="function">db2_fetch_array()</a>, or <a href="function.db2-fetch-object.html" class="function">db2_fetch_object()</a> over <b>db2_fetch_row()</b>/<a href="function.db2-result.html" class="function">db2_result()</a>. In general <b>db2_fetch_row()</b>/<a href="function.db2-result.html" class="function">db2_result()</a> have more issues with various column types in <i>EBCIDIC</i> to <i>ASCII</i> translation, including possible truncation in <i>DBCS</i> applications. You may also find the performance of <a href="function.db2-fetch-both.html" class="function">db2_fetch_both()</a>, <a href="function.db2-fetch-array.html" class="function">db2_fetch_array()</a>, and <a href="function.db2-fetch-object.html" class="function">db2_fetch_object()</a> to be superior to <b>db2_fetch_row()</b>/<a href="function.db2-result.html" class="function">db2_result()</a>. </p></div> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><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">$stmt</span><span style="color: #007700">)){<br /> echo </span><span style="color: #DD0000">"<br>db2_fetch_both {$row['SPECIFIC_NAME']} {$row['ROUTINE_CREATED']} {$row[5]}"</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">$stmt</span><span style="color: #007700">)){<br /> echo </span><span style="color: #DD0000">"<br>db2_fetch_array {$row[1]} {$row[5]}"</span><span style="color: #007700">;<br /> }<br /> </span><span style="color: #0000BB">$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 {$row->SPECIFIC_NAME} {$row->ROUTINE_CREATED}"</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></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>db2_fetch_both MATCH_ANIMAL 2006-08-25-17.10.23.775000 2006-08-25-17.10.23.775000db2_fetch_both MULTIRESULTS 2006-10-17-10.11.05.308000 2006-10-17-10.11.05.308000db2_fetch_array MATCH_ANIMAL 2006-08-25-17.10.23.775000db2_fetch_array MULTIRESULTS 2006-10-17-10.11.05.308000db2_fetch_object MATCH_ANIMAL 2006-08-25-17.10.23.775000db2_fetch_object MULTIRESULTS 2006-10-17-10.11.05.308000</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.db2-fetch-array.html" class="function" rel="rdfs-seeAlso">db2_fetch_array()</a></li> <li class="member"><a href="function.db2-fetch-assoc.html" class="function" rel="rdfs-seeAlso">db2_fetch_assoc()</a></li> <li class="member"><a href="function.db2-fetch-both.html" class="function" rel="rdfs-seeAlso">db2_fetch_both()</a></li> <li class="member"><a href="function.db2-fetch-object.html" class="function" rel="rdfs-seeAlso">db2_fetch_object()</a></li> <li class="member"><a href="function.db2-result.html" class="function" rel="rdfs-seeAlso">db2_result()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.db2-fetch-object.html">db2_fetch_object</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.db2-field-display-size.html">db2_field_display_size</a></div> <div class="up"><a href="ref.ibm-db2.html">IBM DB2 Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -