blob_close.html
来自「嵌入式数据库sqlite 3.5.9的文档」· HTML 代码 · 共 139 行
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html><head><title>Close A BLOB Handle</title><style type="text/css">body { margin: auto; font-family: "Verdana" "sans-serif"; padding: 8px 1%;}a { color: #45735f }a:visited { color: #734559 }.logo { position:absolute; margin:3px; }.tagline { float:right; text-align:right; font-style:italic; width:240px; margin:12px; margin-top:58px;}.toolbar { font-variant: small-caps; text-align: center; line-height: 1.6em; margin: 0; padding:1px 8px;}.toolbar a { color: white; text-decoration: none; padding: 6px 12px; }.toolbar a:visited { color: white; }.toolbar a:hover { color: #80a796; background: white; }.content { margin: 5%; }.content dt { font-weight:bold; }.content dd { margin-bottom: 25px; margin-left:20%; }.content ul { padding:0px; padding-left: 15px; margin:0px; }/* rounded corners */.se { background: url(../images/se.png) 100% 100% no-repeat #80a796}.sw { background: url(../images/sw.png) 0% 100% no-repeat }.ne { background: url(../images/ne.png) 100% 0% no-repeat }.nw { background: url(../images/nw.png) 0% 0% no-repeat }</style><meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head><body><div><!-- container div to satisfy validator --><a href="../index.html"><img class="logo" src="../images/SQLite.gif" alt="SQLite Logo" border="0"></a><div><!-- IE hack to prevent disappearing logo--></div><div class="tagline">Small. Fast. Reliable.<br>Choose any three.</div><table width=100% style="clear:both"><tr><td> <div class="se"><div class="sw"><div class="ne"><div class="nw"> <div class="toolbar"> <a href="../about.html">About</a> <a href="../sitemap.html">Sitemap</a> <a href="../docs.html">Documentation</a> <a href="../download.html">Download</a> <a href="../copyright.html">License</a> <a href="../news.html">News</a> <a href="http://www.sqlite.org/cvstrac/index">Developers</a> <a href="../support.html">Support</a> </div></div></div></div></div></td></tr></table> <a href="intro.html"><h2>SQLite C Interface</h2></a><h2>Close A BLOB Handle</h2><blockquote><pre>int sqlite3_blob_close(sqlite3_blob *);</pre></blockquote><p>Close an open <a href="../c3ref/blob.html">blob handle</a>.</p><p>Closing a BLOB shall cause the current transaction to commitif there are no other BLOBs, no pending prepared statements, and thedatabase connection is in autocommit mode.If any writes were made to the BLOB, they might be held in cacheuntil the close operation if they will fit.Closing the BLOB often forces the changesout to disk and so if any I/O errors occur, they will likely occurat the time when the BLOB is closed. Any errors that occur duringclosing are reported as a non-zero return value.</p><p>The BLOB is closed unconditionally. Even if this routine returnsan error code, the BLOB is still closed.</p><p><h3>Invariants:</h3><table border="0" cellpadding="5" cellspacing="0"><tr><td valign="top">F17833</td> <td valign="top">The <a href="../c3ref/blob_close.html">sqlite3_blob_close(P)</a> interface closes an<a href="../c3ref/blob.html">sqlite3_blob</a> object P previously opened using<a href="../c3ref/blob_open.html">sqlite3_blob_open()</a>.</td></tr><tr><td valign="top">F17836</td> <td valign="top">Closing an <a href="../c3ref/blob.html">sqlite3_blob</a> object using<a href="../c3ref/blob_close.html">sqlite3_blob_close()</a> shall cause the current transaction tocommit if there are no other open <a href="../c3ref/blob.html">sqlite3_blob</a> objectsor <a href="../c3ref/stmt.html">prepared statements</a> on the same <a href="../c3ref/sqlite3.html">database connection</a> andthe <a href="../c3ref/sqlite3.html">database connection</a> is in<a href="../c3ref/get_autocommit.html">autocommit mode</a>.</td></tr><tr><td valign="top">F17839</td> <td valign="top">The <a href="../c3ref/blob_close.html">sqlite3_blob_close(P)</a> interfaces closes the<a href="../c3ref/blob.html">sqlite3_blob</a> object P unconditionally, even if<a href="../c3ref/blob_close.html">sqlite3_blob_close(P)</a> returns something other than <a href="../c3ref/c_abort.html">SQLITE_OK</a>.</td></tr></table></p><p>See also lists of <a href="objlist.html">Objects</a>, <a href="constlist.html">Constants</a>, and <a href="funclist.html">Functions</a>.</p><hr><small><i>This page last modified 2008/05/12 13:08:44 UTC</i></small></div></body></html>⌨️ 快捷键说明
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