492 lines
23 KiB
HTML
492 lines
23 KiB
HTML
<!DOCTYPE html>
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<html><head>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<link href="sqlite.css" rel="stylesheet">
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<title>Many Small Queries Are Efficient In SQLite</title>
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<!-- path= -->
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</head>
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<body>
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<div class=nosearch>
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<a href="index.html">
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<img class="logo" src="images/sqlite370_banner.gif" alt="SQLite" border="0">
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</a>
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<div><!-- IE hack to prevent disappearing logo --></div>
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<div class="tagline desktoponly">
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Small. Fast. Reliable.<br>Choose any three.
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</div>
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<div class="menu mainmenu">
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<ul>
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<li><a href="index.html">Home</a>
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<li class='mobileonly'><a href="javascript:void(0)" onclick='toggle_div("submenu")'>Menu</a>
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<li class='wideonly'><a href='about.html'>About</a>
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<li class='desktoponly'><a href="docs.html">Documentation</a>
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<li class='desktoponly'><a href="download.html">Download</a>
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<li class='wideonly'><a href='copyright.html'>License</a>
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<li class='desktoponly'><a href="support.html">Support</a>
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<li class='desktoponly'><a href="prosupport.html">Purchase</a>
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<li class='search' id='search_menubutton'>
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<a href="javascript:void(0)" onclick='toggle_search()'>Search</a>
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</ul>
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</div>
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<div class="menu submenu" id="submenu">
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<ul>
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<li><a href='about.html'>About</a>
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<li><a href='docs.html'>Documentation</a>
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<li><a href='download.html'>Download</a>
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<li><a href='support.html'>Support</a>
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<li><a href='prosupport.html'>Purchase</a>
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</ul>
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</div>
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<div class="searchmenu" id="searchmenu">
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<form method="GET" action="search">
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<select name="s" id="searchtype">
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<option value="d">Search Documentation</option>
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<option value="c">Search Changelog</option>
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</select>
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<input type="text" name="q" id="searchbox" value="">
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<input type="submit" value="Go">
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</form>
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</div>
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</div>
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<script>
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function toggle_div(nm) {
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var w = document.getElementById(nm);
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if( w.style.display=="block" ){
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w.style.display = "none";
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}else{
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w.style.display = "block";
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}
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function toggle_search() {
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var w = document.getElementById("searchmenu");
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} else {
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w.style.display = "block";
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setTimeout(function(){
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document.getElementById("searchbox").focus()
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}, 30);
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}
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}
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function div_off(nm){document.getElementById(nm).style.display="none";}
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window.onbeforeunload = function(e){div_off("submenu");}
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/* Disable the Search feature if we are not operating from CGI, since */
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/* Search is accomplished using CGI and will not work without it. */
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if( !location.origin || !location.origin.match || !location.origin.match(/http/) ){
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document.getElementById("search_menubutton").style.display = "none";
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}
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</script>
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</div>
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<div class=fancy>
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<div class=nosearch>
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<div class="fancy_title">
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Many Small Queries Are Efficient In SQLite
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</div>
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</div>
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<h1 id="executive_summary"><span>1. </span>Executive Summary</h1>
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<ul>
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<li><p>
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200 SQL statements per webpage is excessive for client/server database
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engines like MySQL, PostgreSQL, or SQL Server.
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</p></li><li><p>
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But with SQLite, 200 or more SQL statement per webpage is not a problem.
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</p></li><li><p>
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SQLite can also do large and complex queries efficiently, just like
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client/server databases. But SQLite can do many smaller queries
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efficiently too. Application developers can use whichever technique
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works best for the task at hand.
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</p></li></ul>
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<h1 id="the_perceived_problem"><span>2. </span>The Perceived Problem</h1>
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<p>
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The <a href="whentouse.html#website">Appropriate Uses For SQLite</a> page says that
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dynamic pages on the SQLite website typically do about 200 SQL
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statements each.
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This has provoked criticism from readers. Examples:
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</p><ul>
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<li><p>
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<i>"200 SQL statements is a ridiculously high number for a single page"</i>
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</p></li><li><p>
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<i>"For most sites, 200 queries is way, way, way too much."</i>
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</p></li><li><p>
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<i>"[This is] bad design"</i>
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</p></li></ul>
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<p>
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Such criticism would be well-founded for a traditional client/server
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database engine, such as MySQL, PostgreSQL, or SQL Server. In
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a client/server database, each SQL statement requires a message
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round-trip from the application to the database server and back to
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the application. Doing over 200 round-trip messages, sequentially,
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can be a serious performance drag. This is sometimes called the
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"N+1 Query Problem" or the "N+1 Select Problem" and it is an anti-pattern.
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</p><h1 id="n_1_queries_are_not_a_problem_with_sqlite"><span>3. </span>N+1 Queries Are Not A Problem With SQLite</h1>
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<p>
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SQLite is <u>not</u> client/server, however. The SQLite database runs
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in the same process address space as the application. Queries do not
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involve message round-trips, only a function call. The latency
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of a single SQL query is far less in SQLite. Hence, using a large number
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of queries with SQLite is not the problem.
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</p><h1 id="the_need_for_over_200_sql_statements_per_webpage"><span>4. </span>The Need For Over 200 SQL Statements Per Webpage</h1>
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<p>
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The dynamic webpages on the SQLite website are mostly generated by
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the <a href="https://www.fossil-scm.org/">Fossil version control system</a>.
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A typical dynamic
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page would be a timeline such as <a href="https://www.sqlite.org/src/timeline">https://www.sqlite.org/src/timeline</a>.
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A log of all SQL used by the timeline is shown below.
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</p><p>
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The first group of queries in the log are extracting display options
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from the "config" and "global_config" tables of the Fossil database.
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Then there is a single complex query that extracts a list of all elements
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to be displayed on the timeline.
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This "timeline" query demonstrates that SQLite can easily process complex
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relational database queries involving multiple tables, subqueries, and
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complex WHERE clause constraints, and it can make effective use of indexes
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to solve the queries with minimal disk I/O.
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</p><p>
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Following the single big "timeline" query,
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there are additional queries for each timeline element.
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Fossil is using the "N+1 Query" pattern rather than trying
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to grab all the information in as few queries as possible.
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But that is ok because there is no unnecessary IPC overhead.
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At the bottom of
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each timeline page, Fossil shows approximately how long it took to generate
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the page. For a 50-entry timeline, the latency is usually less than
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25 milliseconds. Profiling shows that few of those milliseconds
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were spent inside the database engine.
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</p><p>
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Using the N+1 Query pattern in Fossil does not harm the application.
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But the N+1 Query pattern does have benefits. For one, the
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section of the code that creates the timeline query can be
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completely separate from the section that prepares each timeline
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entry for display.
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This provides a separation of responsibility that helps keep the code
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simple and easy to maintain. Secondly, the information
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needed for display, and the queries needed to extract that information,
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vary according to what type of objects to be shown. Check-ins need one
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set of queries. Tickets need another set of queries. Wiki pages need a
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different query. And so forth. By implementing these queries on-demand
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and in the part of the code dealing with the various entities, there is
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further separation of responsibility and simplification of the overall
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code base.
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</p><p>
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So, SQLite is able to do one or two large and complex queries, or it can
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do many smaller and simpler queries. Both are efficient. An application
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can use either or both techniques, depending on what works best for the
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situation at hand.
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</p><p>
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The following is a log of all SQL used to generate one particular
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timeline (captured on 2016-09-16):
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</p><div class="codeblock"><pre>-- sqlite3_open: /home/drh/sqlite/sqlite/.fslckout
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PRAGMA foreign_keys=OFF;
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SELECT sql FROM localdb.sqlite_schema WHERE name=='vfile';
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-- sqlite3_open: /home/drh/.fossil
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PRAGMA foreign_keys=OFF;
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SELECT value FROM vvar WHERE name='repository';
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ATTACH DATABASE '/home/drh/www/repos/sqlite.fossil' AS 'repository' KEY '';
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SELECT value FROM config WHERE name='allow-symlinks';
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SELECT value FROM global_config WHERE name='allow-symlinks';
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SELECT value FROM config WHERE name='aux-schema';
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SELECT 1 FROM config WHERE name='baseurl:http://';
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SELECT value FROM config WHERE name='ip-prefix-terms';
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SELECT value FROM global_config WHERE name='ip-prefix-terms';
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SELECT value FROM config WHERE name='localauth';
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SELECT value FROM vvar WHERE name='default-user';
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SELECT uid FROM user WHERE cap LIKE '%s%';
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SELECT login FROM user WHERE uid=1;
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SELECT cap FROM user WHERE login = 'nobody';
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SELECT cap FROM user WHERE login = 'anonymous';
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SELECT value FROM config WHERE name='public-pages';
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SELECT value FROM global_config WHERE name='public-pages';
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SELECT value FROM config WHERE name='header';
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SELECT value FROM config WHERE name='project-name';
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SELECT value FROM config WHERE name='th1-setup';
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SELECT value FROM global_config WHERE name='th1-setup';
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SELECT value FROM config WHERE name='redirect-to-https';
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SELECT value FROM global_config WHERE name='redirect-to-https';
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SELECT value FROM config WHERE name='index-page';
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SELECT mtime FROM config WHERE name='css';
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SELECT mtime FROM config WHERE name='logo-image';
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SELECT mtime FROM config WHERE name='background-image';
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CREATE TEMP TABLE IF NOT EXISTS timeline(
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rid INTEGER PRIMARY KEY,
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uuid TEXT,
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timestamp TEXT,
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comment TEXT,
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user TEXT,
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isleaf BOOLEAN,
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bgcolor TEXT,
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etype TEXT,
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taglist TEXT,
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tagid INTEGER,
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short TEXT,
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sortby REAL
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)
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;
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INSERT OR IGNORE INTO timeline SELECT
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blob.rid AS blobRid,
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uuid AS uuid,
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datetime(event.mtime,toLocal()) AS timestamp,
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coalesce(ecomment, comment) AS comment,
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coalesce(euser, user) AS user,
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blob.rid IN leaf AS leaf,
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bgcolor AS bgColor,
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event.type AS eventType,
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(SELECT group_concat(substr(tagname,5), ', ') FROM tag, tagxref
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WHERE tagname GLOB 'sym-*' AND tag.tagid=tagxref.tagid
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AND tagxref.rid=blob.rid AND tagxref.tagtype>0) AS tags,
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tagid AS tagid,
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brief AS brief,
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event.mtime AS mtime
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FROM event CROSS JOIN blob
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WHERE blob.rid=event.objid
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AND NOT EXISTS(SELECT 1 FROM tagxref WHERE tagid=5 AND tagtype>0 AND rid=blob.rid)
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ORDER BY event.mtime DESC LIMIT 50;
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-- SELECT value FROM config WHERE name='timeline-utc';
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SELECT count(*) FROM timeline WHERE etype!='div';
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SELECT min(timestamp) FROM timeline;
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SELECT julianday('2016-09-15 14:54:51',fromLocal());
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SELECT EXISTS (SELECT 1 FROM event CROSS JOIN blob WHERE blob.rid=event.objid AND mtime<=2457647.121412037);
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SELECT max(timestamp) FROM timeline;
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SELECT julianday('2016-09-24 17:42:43',fromLocal());
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SELECT EXISTS (SELECT 1 FROM event CROSS JOIN blob WHERE blob.rid=event.objid AND mtime>=2457656.238009259);
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SELECT value FROM config WHERE name='search-ci';
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SELECT value FROM vvar WHERE name='checkout';
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SELECT value FROM config WHERE name='timeline-max-comment';
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SELECT value FROM global_config WHERE name='timeline-max-comment';
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SELECT value FROM config WHERE name='timeline-date-format';
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SELECT value FROM config WHERE name='timeline-truncate-at-blank';
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SELECT value FROM global_config WHERE name='timeline-truncate-at-blank';
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SELECT * FROM timeline ORDER BY sortby DESC;
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SELECT value FROM config WHERE name='hash-digits';
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SELECT value FROM global_config WHERE name='hash-digits';
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=68028;
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SELECT pid FROM plink WHERE cid=68028 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM tagxref WHERE rid=68028 AND tagid=9 AND tagtype>0;
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SELECT value FROM config WHERE name='timeline-block-markup';
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SELECT value FROM config WHERE name='timeline-plaintext';
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SELECT value FROM config WHERE name='wiki-use-html';
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SELECT value FROM global_config WHERE name='wiki-use-html';
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SELECT 1 FROM private WHERE rid=68028;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=68026;
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SELECT pid FROM plink WHERE cid=68026 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=68026;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=68024;
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SELECT pid FROM plink WHERE cid=68024 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=68024;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=68018;
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SELECT pid FROM plink WHERE cid=68018 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=68018;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=68012;
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SELECT pid FROM plink WHERE cid=68012 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=68012;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=68011;
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SELECT value FROM config WHERE name='details';
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SELECT pid FROM plink WHERE cid=68011 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM tagxref WHERE rid=68011 AND tagid=9 AND tagtype>0;
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SELECT 1 FROM private WHERE rid=68011;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=68008;
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SELECT pid FROM plink WHERE cid=68008 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=68008;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=68006;
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SELECT pid FROM plink WHERE cid=68006 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=68006;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=68000;
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SELECT pid FROM plink WHERE cid=68000 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=68000;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67997;
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SELECT pid FROM plink WHERE cid=67997 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67997;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67992;
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SELECT pid FROM plink WHERE cid=67992 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67992;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67990;
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SELECT pid FROM plink WHERE cid=67990 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67990;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67989;
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SELECT pid FROM plink WHERE cid=67989 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67989;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67984;
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SELECT pid FROM plink WHERE cid=67984 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67984;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67983;
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SELECT pid FROM plink WHERE cid=67983 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67983;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67979;
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SELECT pid FROM plink WHERE cid=67979 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67979;
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SELECT value FROM config WHERE name='ticket-closed-expr';
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SELECT status='Closed' OR status='Fixed' FROM ticket WHERE tkt_uuid>='1ec41379c9c1e400' AND tkt_uuid<'1ec41379c9c1e401';
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SELECT 1 FROM private WHERE rid=67980;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67977;
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SELECT pid FROM plink WHERE cid=67977 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT status='Closed' OR status='Fixed' FROM ticket WHERE tkt_uuid>='1ec41379c9c1e400' AND tkt_uuid<'1ec41379c9c1e401';
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SELECT 1 FROM private WHERE rid=67977;
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SELECT status='Closed' OR status='Fixed' FROM ticket WHERE tkt_uuid>='1ec41379c9c1e400' AND tkt_uuid<'1ec41379c9c1e401';
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SELECT 1 FROM private WHERE rid=67974;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67971;
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SELECT pid FROM plink WHERE cid=67971 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67971;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67972;
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SELECT pid FROM plink WHERE cid=67972 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67972;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67969;
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SELECT pid FROM plink WHERE cid=67969 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67969;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67966;
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SELECT pid FROM plink WHERE cid=67966 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67966;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67962;
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SELECT pid FROM plink WHERE cid=67962 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67962;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67960;
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SELECT pid FROM plink WHERE cid=67960 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67960;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67957;
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SELECT pid FROM plink WHERE cid=67957 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67957;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67955;
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SELECT pid FROM plink WHERE cid=67955 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67955;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67953;
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SELECT pid FROM plink WHERE cid=67953 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT status='Closed' OR status='Fixed' FROM ticket WHERE tkt_uuid>='5990a1bdb4a073' AND tkt_uuid<'5990a1bdb4a074';
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SELECT 1 FROM blob WHERE uuid>='5990a1bdb4a073' AND uuid<'5990a1bdb4a074';
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SELECT 1 FROM private WHERE rid=67953;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67941;
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SELECT pid FROM plink WHERE cid=67941 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67941;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67940;
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SELECT pid FROM plink WHERE cid=67940 AND pid NOT IN phantom ORDER BY isprim DESC;
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SELECT 1 FROM private WHERE rid=67940;
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SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67938;
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SELECT pid FROM plink WHERE cid=67938 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67938;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67935;
|
|
SELECT pid FROM plink WHERE cid=67935 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67935;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67934;
|
|
SELECT pid FROM plink WHERE cid=67934 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67934;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67932;
|
|
SELECT pid FROM plink WHERE cid=67932 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67932;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67930;
|
|
SELECT pid FROM plink WHERE cid=67930 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67930;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67928;
|
|
SELECT pid FROM plink WHERE cid=67928 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM tagxref WHERE rid=67928 AND tagid=9 AND tagtype>0;
|
|
SELECT 1 FROM private WHERE rid=67928;
|
|
SELECT status='Closed' OR status='Fixed' FROM ticket WHERE tkt_uuid>='0eab1ac7591f511d' AND tkt_uuid<'0eab1ac7591f511e';
|
|
SELECT 1 FROM private WHERE rid=67919;
|
|
SELECT status='Closed' OR status='Fixed' FROM ticket WHERE tkt_uuid>='01874d252ac44861' AND tkt_uuid<'01874d252ac44862';
|
|
SELECT 1 FROM blob WHERE uuid>='01874d252ac44861' AND uuid<'01874d252ac44862';
|
|
SELECT 1 FROM private WHERE rid=67918;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67916;
|
|
SELECT pid FROM plink WHERE cid=67916 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT status='Closed' OR status='Fixed' FROM ticket WHERE tkt_uuid>='0eab1ac759' AND tkt_uuid<'0eab1ac75:';
|
|
SELECT 1 FROM private WHERE rid=67916;
|
|
SELECT status='Closed' OR status='Fixed' FROM ticket WHERE tkt_uuid>='a49bc0a8244feb08' AND tkt_uuid<'a49bc0a8244feb09';
|
|
SELECT 1 FROM blob WHERE uuid>='a49bc0a8244feb08' AND uuid<'a49bc0a8244feb09';
|
|
SELECT 1 FROM private WHERE rid=67914;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67913;
|
|
SELECT pid FROM plink WHERE cid=67913 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT status='Closed' OR status='Fixed' FROM ticket WHERE tkt_uuid>='0eab1ac7591f' AND tkt_uuid<'0eab1ac7591g';
|
|
SELECT 1 FROM private WHERE rid=67913;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67911;
|
|
SELECT pid FROM plink WHERE cid=67911 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67911;
|
|
SELECT status='Closed' OR status='Fixed' FROM ticket WHERE tkt_uuid>='0eab1ac7591f511d' AND tkt_uuid<'0eab1ac7591f511e';
|
|
SELECT 1 FROM private WHERE rid=67909;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67907;
|
|
SELECT pid FROM plink WHERE cid=67907 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67907;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67899;
|
|
SELECT pid FROM plink WHERE cid=67899 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67899;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67897;
|
|
SELECT pid FROM plink WHERE cid=67897 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67897;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67895;
|
|
SELECT pid FROM plink WHERE cid=67895 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67895;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67893;
|
|
SELECT pid FROM plink WHERE cid=67893 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67893;
|
|
SELECT value FROM tagxref WHERE tagid=8 AND tagtype>0 AND rid=67891;
|
|
SELECT pid FROM plink WHERE cid=67891 AND pid NOT IN phantom ORDER BY isprim DESC;
|
|
SELECT 1 FROM private WHERE rid=67891;
|
|
SELECT count(*) FROM plink
|
|
WHERE pid=67928 AND isprim
|
|
AND coalesce((SELECT value FROM tagxref
|
|
WHERE tagid=8 AND rid=plink.pid), 'trunk')
|
|
=coalesce((SELECT value FROM tagxref
|
|
WHERE tagid=8 AND rid=plink.cid), 'trunk')
|
|
;
|
|
SELECT count(*) FROM plink
|
|
WHERE pid=68011 AND isprim
|
|
AND coalesce((SELECT value FROM tagxref
|
|
WHERE tagid=8 AND rid=plink.pid), 'trunk')
|
|
=coalesce((SELECT value FROM tagxref
|
|
WHERE tagid=8 AND rid=plink.cid), 'trunk')
|
|
;
|
|
SELECT count(*) FROM plink
|
|
WHERE pid=68028 AND isprim
|
|
AND coalesce((SELECT value FROM tagxref
|
|
WHERE tagid=8 AND rid=plink.pid), 'trunk')
|
|
=coalesce((SELECT value FROM tagxref
|
|
WHERE tagid=8 AND rid=plink.cid), 'trunk')
|
|
;
|
|
SELECT value FROM config WHERE name='show-version-diffs';
|
|
SELECT value FROM config WHERE name='adunit-omit-if-admin';
|
|
SELECT value FROM global_config WHERE name='adunit-omit-if-admin';
|
|
SELECT value FROM config WHERE name='adunit-omit-if-user';
|
|
SELECT value FROM global_config WHERE name='adunit-omit-if-user';
|
|
SELECT value FROM config WHERE name='adunit';
|
|
SELECT value FROM global_config WHERE name='adunit';
|
|
SELECT value FROM config WHERE name='auto-hyperlink-delay';
|
|
SELECT value FROM global_config WHERE name='auto-hyperlink-delay';
|
|
SELECT value FROM config WHERE name='footer';
|
|
PRAGMA database_list;
|
|
PRAGMA database_list;
|
|
PRAGMA localdb.freelist_count;
|
|
PRAGMA localdb.page_count;
|
|
</pre></div>
|
|
|