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| <h1 title="Interface SubQueryConverter" class="title">Interface SubQueryConverter</h1> |
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| <pre>public interface <span class="typeNameLabel">SubQueryConverter</span></pre> |
| <div class="block">SubQueryConverter provides the interface for classes that convert sub-queries |
| into equivalent expressions.</div> |
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| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#canConvertSubQuery()">canConvertSubQuery</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns whether the sub-query can be converted.</div> |
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| <td class="colFirst"><code><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#convertSubQuery(org.apache.calcite.sql.SqlCall,org.apache.calcite.sql2rel.SqlToRelConverter,boolean,boolean)">convertSubQuery</a></span>​(<a href="../sql/SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a> subQuery, |
| <a href="SqlToRelConverter.html" title="class in org.apache.calcite.sql2rel">SqlToRelConverter</a> parentConverter, |
| boolean isExists, |
| boolean isExplain)</code></th> |
| <td class="colLast"> |
| <div class="block">Converts the sub-query to an equivalent expression.</div> |
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| <h3><a id="canConvertSubQuery()">canConvertSubQuery</a></h3> |
| <div class="memberSignature"><span class="returnType">boolean</span> <span class="memberName">canConvertSubQuery</span>()</div> |
| <div class="block">Returns whether the sub-query can be converted.</div> |
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| <h3><a id="convertSubQuery(org.apache.calcite.sql.SqlCall,org.apache.calcite.sql2rel.SqlToRelConverter,boolean,boolean)">convertSubQuery</a></h3> |
| <div class="memberSignature"><span class="returnType"><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">convertSubQuery</span>​(<span class="arguments"><a href="../sql/SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a> subQuery, |
| <a href="SqlToRelConverter.html" title="class in org.apache.calcite.sql2rel">SqlToRelConverter</a> parentConverter, |
| boolean isExists, |
| boolean isExplain)</span></div> |
| <div class="block">Converts the sub-query to an equivalent expression.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>subQuery</code> - the SqlNode tree corresponding to a sub-query</dd> |
| <dd><code>parentConverter</code> - sqlToRelConverter of the parent query</dd> |
| <dd><code>isExists</code> - whether the sub-query is part of an EXISTS |
| expression</dd> |
| <dd><code>isExplain</code> - whether the sub-query is part of an EXPLAIN PLAN |
| statement</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the equivalent expression or null if the sub-query couldn't be |
| converted</dd> |
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