shard-crystal-db/api/0.4.2/DB/Statement.html
2017-04-21 17:28:25 -03:00

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<h1 class="type-name">
<span class="kind">abstract class</span> DB::Statement
</h1>
<ul class="superclass-hierarchy"><li class="superclass"><a href="../DB/Statement.html">DB::Statement</a></li><li class="superclass">Reference</li><li class="superclass">Object</li></ul>
<h2>Overview</h2>
<p>Represents a query in a <code><a href="../DB/Connection.html">Connection</a></code>.
It should be created by <code><a href="../DB/QueryMethods.html">QueryMethods</a></code>.</p>
<h3>Note to implementors</h3>
<ol><li>Subclass <code>Statements</code></li><li><code>Statements</code> are created from a custom driver <code>Connection#prepare</code> method.</li><li><code>#perform_query</code> executes a query that is expected to return a <code><a href="../DB/ResultSet.html">ResultSet</a></code></li><li><code>#perform_exec</code> executes a query that is expected to return an <code><a href="../DB/ExecResult.html">ExecResult</a></code></li><li><code>#do_close</code> is called to release the statement resources.</li></ol>
<h2>Included Modules</h2>
<ul class="other-types-list">
<li class="other-type"><a href="../DB/StatementMethods.html">DB::StatementMethods</a></li>
</ul>
<h2>Defined in:</h2>
<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/statement.cr#L52" target="_blank">db/statement.cr</a>
<br/>
<h2>Class Method Summary</h2>
<ul class="list-summary">
<li class="entry-summary">
<a href="#new%28connection%3AConnection%29-class-method" class="signature"><strong>.new</strong>(connection : Connection)</a>
</li>
</ul>
<h2>Instance Method Summary</h2>
<ul class="list-summary">
<li class="entry-summary">
<a href="#exec%28args%3AArray%29-instance-method" class="signature"><strong>#exec</strong>(args : Array)</a>
<div class="summary"><p>See <code><a href="../DB/QueryMethods.html#exec%28query%2C%2Aargs%29-instance-method">QueryMethods#exec</a></code></p></div>
</li>
<li class="entry-summary">
<a href="#exec-instance-method" class="signature"><strong>#exec</strong></a>
<div class="summary"><p>See <code><a href="../DB/QueryMethods.html#exec%28query%2C%2Aargs%29-instance-method">QueryMethods#exec</a></code></p></div>
</li>
<li class="entry-summary">
<a href="#exec%28%2Aargs%29-instance-method" class="signature"><strong>#exec</strong>(*args)</a>
<div class="summary"><p>See <code><a href="../DB/QueryMethods.html#exec%28query%2C%2Aargs%29-instance-method">QueryMethods#exec</a></code></p></div>
</li>
<li class="entry-summary">
<a href="#query%28args%3AArray%29-instance-method" class="signature"><strong>#query</strong>(args : Array)</a>
<div class="summary"><p>See <code><a href="../DB/QueryMethods.html#query%28query%2C%2Aargs%29-instance-method">QueryMethods#query</a></code></p></div>
</li>
<li class="entry-summary">
<a href="#query-instance-method" class="signature"><strong>#query</strong></a>
<div class="summary"><p>See <code><a href="../DB/QueryMethods.html#query%28query%2C%2Aargs%29-instance-method">QueryMethods#query</a></code></p></div>
</li>
<li class="entry-summary">
<a href="#query%28%2Aargs%29-instance-method" class="signature"><strong>#query</strong>(*args)</a>
<div class="summary"><p>See <code><a href="../DB/QueryMethods.html#query%28query%2C%2Aargs%29-instance-method">QueryMethods#query</a></code></p></div>
</li>
<li class="entry-summary">
<a href="#release_connection-instance-method" class="signature"><strong>#release_connection</strong></a>
</li>
</ul>
<div class="methods-inherited">
<h3>Instance methods inherited from module <code><a href="../DB/StatementMethods.html">DB::StatementMethods</a></code></h3>
<a href="../DB/StatementMethods.html#exec%28args%3AArray%29%3AExecResult-instance-method" class="tooltip">
<span>exec(args : Array) : ExecResult<br/>exec : ExecResult<br/>exec(*args) : ExecResult</span>
exec</a>,
<a href="../DB/StatementMethods.html#query%28%2Aargs%2C%26block%29-instance-method" class="tooltip">
<span>query(*args, &block)<br/>query(args : Array) : ResultSet<br/>query : ResultSet<br/>query(*args) : ResultSet</span>
query</a>,
<a href="../DB/StatementMethods.html#scalar%28%2Aargs%29-instance-method" class="tooltip">
<span>scalar(*args)</span>
scalar</a>
<h3>Instance methods inherited from module <code><a href="../DB/Disposable.html">DB::Disposable</a></code></h3>
<a href="../DB/Disposable.html#close-instance-method" class="tooltip">
<span>close</span>
close</a>,
<a href="../DB/Disposable.html#closed%3F-instance-method" class="tooltip">
<span>closed?</span>
closed?</a>
</div>
<h2>Class Method Detail</h2>
<div class="entry-detail" id="new&#40;connection:Connection&#41;-class-method">
<div class="signature">
def self.<strong>new</strong>(connection : <a href="../DB/Connection.html">Connection</a>)
<a class="method-permalink" href="#new%28connection%3AConnection%29-class-method">#</a>
</div>
<br/>
<div>
[<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/statement.cr#L58" target="_blank">View source</a>]
</div>
</div>
<h2>Instance Method Detail</h2>
<div class="entry-detail" id="exec&#40;args:Array&#41;-instance-method">
<div class="signature">
def <strong>exec</strong>(args : Array)
<a class="method-permalink" href="#exec%28args%3AArray%29-instance-method">#</a>
</div>
<div class="doc"><p>See <code><a href="../DB/QueryMethods.html#exec%28query%2C%2Aargs%29-instance-method">QueryMethods#exec</a></code></p></div>
<br/>
<div>
[<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/statement.cr#L71" target="_blank">View source</a>]
</div>
</div>
<div class="entry-detail" id="exec-instance-method">
<div class="signature">
def <strong>exec</strong>
<a class="method-permalink" href="#exec-instance-method">#</a>
</div>
<div class="doc"><p>See <code><a href="../DB/QueryMethods.html#exec%28query%2C%2Aargs%29-instance-method">QueryMethods#exec</a></code></p></div>
<br/>
<div>
[<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/statement.cr#L66" target="_blank">View source</a>]
</div>
</div>
<div class="entry-detail" id="exec&#40;*args&#41;-instance-method">
<div class="signature">
def <strong>exec</strong>(*args)
<a class="method-permalink" href="#exec%28%2Aargs%29-instance-method">#</a>
</div>
<div class="doc"><p>See <code><a href="../DB/QueryMethods.html#exec%28query%2C%2Aargs%29-instance-method">QueryMethods#exec</a></code></p></div>
<br/>
<div>
[<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/statement.cr#L76" target="_blank">View source</a>]
</div>
</div>
<div class="entry-detail" id="query&#40;args:Array&#41;-instance-method">
<div class="signature">
def <strong>query</strong>(args : Array)
<a class="method-permalink" href="#query%28args%3AArray%29-instance-method">#</a>
</div>
<div class="doc"><p>See <code><a href="../DB/QueryMethods.html#query%28query%2C%2Aargs%29-instance-method">QueryMethods#query</a></code></p></div>
<br/>
<div>
[<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/statement.cr#L87" target="_blank">View source</a>]
</div>
</div>
<div class="entry-detail" id="query-instance-method">
<div class="signature">
def <strong>query</strong>
<a class="method-permalink" href="#query-instance-method">#</a>
</div>
<div class="doc"><p>See <code><a href="../DB/QueryMethods.html#query%28query%2C%2Aargs%29-instance-method">QueryMethods#query</a></code></p></div>
<br/>
<div>
[<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/statement.cr#L82" target="_blank">View source</a>]
</div>
</div>
<div class="entry-detail" id="query&#40;*args&#41;-instance-method">
<div class="signature">
def <strong>query</strong>(*args)
<a class="method-permalink" href="#query%28%2Aargs%29-instance-method">#</a>
</div>
<div class="doc"><p>See <code><a href="../DB/QueryMethods.html#query%28query%2C%2Aargs%29-instance-method">QueryMethods#query</a></code></p></div>
<br/>
<div>
[<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/statement.cr#L92" target="_blank">View source</a>]
</div>
</div>
<div class="entry-detail" id="release_connection-instance-method">
<div class="signature">
def <strong>release_connection</strong>
<a class="method-permalink" href="#release_connection-instance-method">#</a>
</div>
<br/>
<div>
[<a href="https://github.com/crystal-lang/crystal-db/blob/28c6f3b715f0c82d2a37106fd5a55882a238cc1f/src/db/statement.cr#L61" target="_blank">View source</a>]
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