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138 lines
4.7 KiB
HTML
138 lines
4.7 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>Prepare an SQL-statement for execution</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.ifx-prepare" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">ifx_prepare</h1>
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<p class="verinfo">(PHP 4, PHP 5 < 5.2.1)</p><p class="refpurpose"><span class="refname">ifx_prepare</span> — <span class="dc-title">Prepare an SQL-statement for execution</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.ifx-prepare-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>ifx_prepare</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$query</code></span>
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, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$link_identifier</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$cursor_def</code></span>
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], <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$blobidarray</code></span>
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) : <span class="type">resource</span></div>
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<p class="para rdfs-comment">
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Prepares a <code class="parameter">query</code> for later use with
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<span class="function"><a href="ifx_do.html" class="function">ifx_do()</a></span>.
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</p>
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<p class="para">
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For "select-type" queries a cursor is declared and opened.
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Non-select queries are "execute immediate".
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</p>
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<p class="para">
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For either query type the number of (estimated or real) affected rows is
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saved for retrieval by <span class="function"><a href="ifx_affected_rows.html" class="function">ifx_affected_rows()</a></span>.
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</p>
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<p class="para">
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If the contents of the TEXT (or BYTE) column allow it, you can also use
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<em>ifx_textasvarchar(1)</em> and
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<em>ifx_byteasvarchar(1)</em>. This allows you to treat TEXT
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(or BYTE) columns just as if they were ordinary (but long) VARCHAR columns
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for select queries, and you don't need to bother with blob id's.
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</p>
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<p class="para">
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With <em>ifx_textasvarchar(0)</em> or
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<em>ifx_byteasvarchar(0)</em> (the default situation), select
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queries will return BLOB columns as blob id's (integer value). You can
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get the value of the blob as a string or file with the blob functions (see
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below).
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.ifx-prepare-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">query</code></dt>
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<dd>
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<p class="para">
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The query string.
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</p>
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</dd>
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<dt>
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<code class="parameter">link_identifier</code></dt>
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<dd>
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<p class="para">
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The link identifier.
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</p>
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</dd>
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<dt>
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<code class="parameter">cursor_def</code></dt>
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<dd>
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<p class="para">
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This optional parameter allows you to make this a
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<em>scroll</em> and/or <em>hold</em> cursor.
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It's a bitmask and can be either <strong><code>IFX_SCROLL</code></strong>,
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<strong><code>IFX_HOLD</code></strong>, or both or'ed together.
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</p>
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</dd>
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<dt>
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<code class="parameter">blobidarray</code></dt>
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<dd>
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<p class="para">
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If you have BLOB (BYTE or TEXT) columns in the query, you can add
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a <code class="parameter">blobidarray</code> parameter containing the
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corresponding "blob ids", and you should replace those columns
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with a "?" in the query text.
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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.ifx-prepare-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns a valid result identifier for use by <span class="function"><a href="ifx_do.html" class="function">ifx_do()</a></span>,
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or <strong><code>FALSE</code></strong> on errors.
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.ifx-prepare-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="ifx_do.html" class="function" rel="rdfs-seeAlso">ifx_do()</a> - Execute a previously prepared SQL-statement</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> |