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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Class: SQLite3::ResultSet</title>
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<table width="100%" border='0' cellpadding='0' cellspacing='0' class='banner'><tr>
<td class="file-title"><span class="file-title-prefix">Class</span><br />SQLite3::ResultSet</td>
<td align="right">
<table cellspacing=0 cellpadding=2>
<tr valign="top">
<td>In:</td>
<td>
<a href="../../files/lib/sqlite3/resultset_rb.html">lib/sqlite3/resultset.rb</a>
</td>
</tr>
<tr>
<td>Parent:</td>
<td>
Object
</td>
</tr>
</table>
</td>
</tr>
</table>
<!-- banner header -->
<div id="bodyContent">
<div id="content">
<div id="contextContent">
<div class="description"><p>
The <a href="ResultSet.html">ResultSet</a> object encapsulates the
enumerability of a query’s output. It is a simple cursor over the
data that the query returns. It will very rarely (if ever) be instantiated
directly. Instead, client’s should obtain a <a
href="ResultSet.html">ResultSet</a> instance via <a
href="Statement.html#M000079">Statement#execute</a>.
</p>
</div>
<div class="sectiontitle">Methods</div>
<ul>
<li><a href="#M000088">close</a></li>
<li><a href="#M000089">closed?</a></li>
<li><a href="#M000091">columns</a></li>
<li><a href="#M000087">each</a></li>
<li><a href="#M000085">eof?</a></li>
<li><a href="#M000083">new</a></li>
<li><a href="#M000086">next</a></li>
<li><a href="#M000084">reset</a></li>
<li><a href="#M000090">types</a></li>
</ul>
</div>
<div class="sectiontitle">Included Modules</div>
<ul>
<li>Enumerable</li>
</ul>
<div id="section">
<div class="sectiontitle">Classes and Modules</div>
Module <a href="ResultSet/FieldsContainer.html" class="link">SQLite3::ResultSet::FieldsContainer</a><br />
Module <a href="ResultSet/TypesContainer.html" class="link">SQLite3::ResultSet::TypesContainer</a><br />
<div class="sectiontitle">Public Class methods</div>
<div class="method">
<div class="title">
<a name="M000083"></a><b>new</b>( db, stmt )
</div>
<div class="description">
<p>
Create a new <a href="ResultSet.html">ResultSet</a> attached to the given
database, using the given sql text.
</p>
</div>
<div class="sourcecode">
<p class="source-link">[ <a href="javascript:toggleSource('M000083-source')" id="l_M000083-source">show source</a> ]</p>
<div id="M000083-source" class="dyn-source">
<pre>
<span class="ruby-comment cmt"># File lib/sqlite3/resultset.rb, line 57</span>
57: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>( <span class="ruby-identifier">db</span>, <span class="ruby-identifier">stmt</span> )
58: <span class="ruby-ivar">@db</span> = <span class="ruby-identifier">db</span>
59: <span class="ruby-ivar">@driver</span> = <span class="ruby-ivar">@db</span>.<span class="ruby-identifier">driver</span>
60: <span class="ruby-ivar">@stmt</span> = <span class="ruby-identifier">stmt</span>
61: <span class="ruby-identifier">commence</span>
62: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div class="sectiontitle">Public Instance methods</div>
<div class="method">
<div class="title">
<a name="M000088"></a><b>close</b>()
</div>
<div class="description">
<p>
Closes the statement that spawned this result set. <em>Use with
caution!</em> Closing a result set will automatically close any other
result sets that were spawned from the same statement.
</p>
</div>
<div class="sourcecode">
<p class="source-link">[ <a href="javascript:toggleSource('M000088-source')" id="l_M000088-source">show source</a> ]</p>
<div id="M000088-source" class="dyn-source">
<pre>
<span class="ruby-comment cmt"># File lib/sqlite3/resultset.rb, line 168</span>
168: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">close</span>
169: <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">close</span>
170: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div class="method">
<div class="title">
<a name="M000089"></a><b>closed?</b>()
</div>
<div class="description">
<p>
Queries whether the underlying statement has been closed or not.
</p>
</div>
<div class="sourcecode">
<p class="source-link">[ <a href="javascript:toggleSource('M000089-source')" id="l_M000089-source">show source</a> ]</p>
<div id="M000089-source" class="dyn-source">
<pre>
<span class="ruby-comment cmt"># File lib/sqlite3/resultset.rb, line 173</span>
173: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">closed?</span>
174: <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">closed?</span>
175: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div class="method">
<div class="title">
<a name="M000091"></a><b>columns</b>()
</div>
<div class="description">
<p>
Returns the names of the columns returned by this result set.
</p>
</div>
<div class="sourcecode">
<p class="source-link">[ <a href="javascript:toggleSource('M000091-source')" id="l_M000091-source">show source</a> ]</p>
<div id="M000091-source" class="dyn-source">
<pre>
<span class="ruby-comment cmt"># File lib/sqlite3/resultset.rb, line 183</span>
183: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">columns</span>
184: <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">columns</span>
185: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div class="method">
<div class="title">
<a name="M000087"></a><b>each</b>() {|row| ...}
</div>
<div class="description">
<p>
Required by the Enumerable mixin. Provides an internal iterator over the
rows of the result set.
</p>
</div>
<div class="sourcecode">
<p class="source-link">[ <a href="javascript:toggleSource('M000087-source')" id="l_M000087-source">show source</a> ]</p>
<div id="M000087-source" class="dyn-source">
<pre>
<span class="ruby-comment cmt"># File lib/sqlite3/resultset.rb, line 159</span>
159: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">each</span>
160: <span class="ruby-keyword kw">while</span> <span class="ruby-identifier">row</span>=<span class="ruby-keyword kw">self</span>.<span class="ruby-identifier">next</span>
161: <span class="ruby-keyword kw">yield</span> <span class="ruby-identifier">row</span>
162: <span class="ruby-keyword kw">end</span>
163: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div class="method">
<div class="title">
<a name="M000085"></a><b>eof?</b>()
</div>
<div class="description">
<p>
Query whether the cursor has reached the end of the result set or not.
</p>
</div>
<div class="sourcecode">
<p class="source-link">[ <a href="javascript:toggleSource('M000085-source')" id="l_M000085-source">show source</a> ]</p>
<div id="M000085-source" class="dyn-source">
<pre>
<span class="ruby-comment cmt"># File lib/sqlite3/resultset.rb, line 91</span>
91: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">eof?</span>
92: <span class="ruby-ivar">@eof</span>
93: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div class="method">
<div class="title">
<a name="M000086"></a><b>next</b>()
</div>
<div class="description">
<p>
Obtain the next row from the cursor. If there are no more rows to be had,
this will return <tt>nil</tt>. If type translation is active on the
corresponding database, the values in the row will be translated according
to their types.
</p>
<p>
The returned value will be an array, unless Database#results_as_hash has
been set to <tt>true</tt>, in which case the returned value will be a hash.
</p>
<p>
For arrays, the column names are accessible via the <tt>fields</tt>
property, and the column types are accessible via the <tt>types</tt>
property.
</p>
<p>
For hashes, the column names are the keys of the hash, and the column types
are accessible via the <tt>types</tt> property.
</p>
</div>
<div class="sourcecode">
<p class="source-link">[ <a href="javascript:toggleSource('M000086-source')" id="l_M000086-source">show source</a> ]</p>
<div id="M000086-source" class="dyn-source">
<pre>
<span class="ruby-comment cmt"># File lib/sqlite3/resultset.rb, line 108</span>
108: <span class="ruby-keyword kw">def</span> <span class="ruby-keyword kw">next</span>
109: <span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">nil</span> <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@eof</span>
110:
111: <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">must_be_open!</span>
112:
113: <span class="ruby-keyword kw">unless</span> <span class="ruby-ivar">@first_row</span>
114: <span class="ruby-identifier">result</span> = <span class="ruby-ivar">@driver</span>.<span class="ruby-identifier">step</span>( <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">handle</span> )
115: <span class="ruby-identifier">check</span> <span class="ruby-identifier">result</span>
116: <span class="ruby-keyword kw">end</span>
117:
118: <span class="ruby-ivar">@first_row</span> = <span class="ruby-keyword kw">false</span>
119:
120: <span class="ruby-keyword kw">unless</span> <span class="ruby-ivar">@eof</span>
121: <span class="ruby-identifier">row</span> = []
122: <span class="ruby-ivar">@driver</span>.<span class="ruby-identifier">data_count</span>( <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">handle</span> ).<span class="ruby-identifier">times</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">column</span><span class="ruby-operator">|</span>
123: <span class="ruby-keyword kw">case</span> <span class="ruby-ivar">@driver</span>.<span class="ruby-identifier">column_type</span>( <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">handle</span>, <span class="ruby-identifier">column</span> )
124: <span class="ruby-keyword kw">when</span> <span class="ruby-constant">Constants</span><span class="ruby-operator">::</span><span class="ruby-constant">ColumnType</span><span class="ruby-operator">::</span><span class="ruby-constant">NULL</span> <span class="ruby-keyword kw">then</span>
125: <span class="ruby-identifier">row</span> <span class="ruby-operator"><<</span> <span class="ruby-keyword kw">nil</span>
126: <span class="ruby-keyword kw">when</span> <span class="ruby-constant">Constants</span><span class="ruby-operator">::</span><span class="ruby-constant">ColumnType</span><span class="ruby-operator">::</span><span class="ruby-constant">BLOB</span> <span class="ruby-keyword kw">then</span>
127: <span class="ruby-identifier">row</span> <span class="ruby-operator"><<</span> <span class="ruby-ivar">@driver</span>.<span class="ruby-identifier">column_blob</span>( <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">handle</span>, <span class="ruby-identifier">column</span> )
128: <span class="ruby-keyword kw">else</span>
129: <span class="ruby-identifier">row</span> <span class="ruby-operator"><<</span> <span class="ruby-ivar">@driver</span>.<span class="ruby-identifier">column_text</span>( <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">handle</span>, <span class="ruby-identifier">column</span> )
130: <span class="ruby-keyword kw">end</span>
131: <span class="ruby-keyword kw">end</span>
132:
133: <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@db</span>.<span class="ruby-identifier">type_translation</span>
134: <span class="ruby-identifier">row</span> = <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">types</span>.<span class="ruby-identifier">zip</span>( <span class="ruby-identifier">row</span> ).<span class="ruby-identifier">map</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">type</span>, <span class="ruby-identifier">value</span><span class="ruby-operator">|</span>
135: <span class="ruby-ivar">@db</span>.<span class="ruby-identifier">translator</span>.<span class="ruby-identifier">translate</span>( <span class="ruby-identifier">type</span>, <span class="ruby-identifier">value</span> )
136: <span class="ruby-keyword kw">end</span>
137: <span class="ruby-keyword kw">end</span>
138:
139: <span class="ruby-keyword kw">if</span> <span class="ruby-ivar">@db</span>.<span class="ruby-identifier">results_as_hash</span>
140: <span class="ruby-identifier">new_row</span> = <span class="ruby-constant">Hash</span>[ <span class="ruby-operator">*</span>( <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">columns</span>.<span class="ruby-identifier">zip</span>( <span class="ruby-identifier">row</span> ).<span class="ruby-identifier">flatten</span> ) ]
141: <span class="ruby-identifier">row</span>.<span class="ruby-identifier">each_with_index</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">value</span>,<span class="ruby-identifier">idx</span><span class="ruby-operator">|</span> <span class="ruby-identifier">new_row</span>[<span class="ruby-identifier">idx</span>] = <span class="ruby-identifier">value</span> }
142: <span class="ruby-identifier">row</span> = <span class="ruby-identifier">new_row</span>
143: <span class="ruby-keyword kw">else</span>
144: <span class="ruby-identifier">row</span>.<span class="ruby-identifier">extend</span> <span class="ruby-constant">FieldsContainer</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-identifier">row</span>.<span class="ruby-identifier">respond_to?</span>(<span class="ruby-identifier">:fields</span>)
145: <span class="ruby-identifier">row</span>.<span class="ruby-identifier">fields</span> = <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">columns</span>
146: <span class="ruby-keyword kw">end</span>
147:
148: <span class="ruby-identifier">row</span>.<span class="ruby-identifier">extend</span> <span class="ruby-constant">TypesContainer</span>
149: <span class="ruby-identifier">row</span>.<span class="ruby-identifier">types</span> = <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">types</span>
150:
151: <span class="ruby-keyword kw">return</span> <span class="ruby-identifier">row</span>
152: <span class="ruby-keyword kw">end</span>
153:
154: <span class="ruby-keyword kw">nil</span>
155: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div class="method">
<div class="title">
<a name="M000084"></a><b>reset</b>( *bind_params )
</div>
<div class="description">
<p>
Reset the cursor, so that a result set which has reached end-of-file can be
rewound and reiterated.
</p>
</div>
<div class="sourcecode">
<p class="source-link">[ <a href="javascript:toggleSource('M000084-source')" id="l_M000084-source">show source</a> ]</p>
<div id="M000084-source" class="dyn-source">
<pre>
<span class="ruby-comment cmt"># File lib/sqlite3/resultset.rb, line 82</span>
82: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">reset</span>( <span class="ruby-operator">*</span><span class="ruby-identifier">bind_params</span> )
83: <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">must_be_open!</span>
84: <span class="ruby-ivar">@driver</span>.<span class="ruby-identifier">reset</span>( <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">handle</span> )
85: <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">bind_params</span>( <span class="ruby-operator">*</span><span class="ruby-identifier">bind_params</span> )
86: <span class="ruby-ivar">@eof</span> = <span class="ruby-keyword kw">false</span>
87: <span class="ruby-identifier">commence</span>
88: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div class="method">
<div class="title">
<a name="M000090"></a><b>types</b>()
</div>
<div class="description">
<p>
Returns the types of the columns returned by this result set.
</p>
</div>
<div class="sourcecode">
<p class="source-link">[ <a href="javascript:toggleSource('M000090-source')" id="l_M000090-source">show source</a> ]</p>
<div id="M000090-source" class="dyn-source">
<pre>
<span class="ruby-comment cmt"># File lib/sqlite3/resultset.rb, line 178</span>
178: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">types</span>
179: <span class="ruby-ivar">@stmt</span>.<span class="ruby-identifier">types</span>
180: <span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
</div>
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