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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.sql</a></div>
<h1 title="Interface SqlWriter.Frame" class="title">Interface SqlWriter.Frame</h1>
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<section class="class-description" id="class-description">
<dl class="notes">
<dt>All Known Implementing Classes:</dt>
<dd><code><a href="pretty/SqlPrettyWriter.FrameImpl.html" title="class in org.apache.calcite.sql.pretty">SqlPrettyWriter.FrameImpl</a></code></dd>
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<dt>Enclosing interface:</dt>
<dd><a href="SqlWriter.html" title="interface in org.apache.calcite.sql">SqlWriter</a></dd>
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<div class="type-signature"><span class="modifiers">public static interface </span><span class="element-name type-name-label">SqlWriter.Frame</span></div>
<div class="block">A Frame is a piece of generated text which shares a common indentation
level.
<p>Every frame has a beginning, a series of clauses and separators, and
an end. A typical frame is a comma-separated list. It begins with a "(",
consists of expressions separated by ",", and ends with a ")".
<p>A select statement is also a kind of frame. The beginning and end are
are empty strings, but it consists of a sequence of clauses. "SELECT",
"FROM", "WHERE" are separators.
<p>A frame is current between a call to one of the
<a href="SqlWriter.html#startList(java.lang.String,java.lang.String)"><code>SqlWriter.startList(java.lang.String, java.lang.String)</code></a> methods and the call to
<a href="SqlWriter.html#endList(org.apache.calcite.sql.SqlWriter.Frame)"><code>SqlWriter.endList(Frame)</code></a>. If other code starts a frame in the mean
time, the sub-frame is put onto a stack.</div>
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