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| <h2 title="Class Projections.ProjectionEvaluator" class="title">Class Projections.ProjectionEvaluator</h2> |
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| <li>java.lang.Object</li> |
| <li> |
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| <li><a href="../../../../org/apache/iceberg/expressions/ExpressionVisitors.ExpressionVisitor.html" title="class in org.apache.iceberg.expressions">org.apache.iceberg.expressions.ExpressionVisitors.ExpressionVisitor</a><<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a>></li> |
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| <li>org.apache.iceberg.expressions.Projections.ProjectionEvaluator</li> |
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| <dt>Enclosing class:</dt> |
| <dd><a href="../../../../org/apache/iceberg/expressions/Projections.html" title="class in org.apache.iceberg.expressions">Projections</a></dd> |
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| <pre>public abstract static class <span class="typeNameLabel">Projections.ProjectionEvaluator</span> |
| extends <a href="../../../../org/apache/iceberg/expressions/ExpressionVisitors.ExpressionVisitor.html" title="class in org.apache.iceberg.expressions">ExpressionVisitors.ExpressionVisitor</a><<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a>></pre> |
| <div class="block">A class that projects expressions for a table's data rows into expressions on the table's |
| partition values, for a table's <a href="../../../../org/apache/iceberg/PartitionSpec.html" title="class in org.apache.iceberg"><code>partition spec</code></a>. |
| <p> |
| There are two types of projections: inclusive and strict. |
| <p> |
| An inclusive projection guarantees that if an expression matches a row, the projected |
| expression will match the row's partition. |
| <p> |
| A strict projection guarantees that if a partition matches a projected expression, then all |
| rows in that partition will match the original expression.</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/expressions/Projections.ProjectionEvaluator.html#ProjectionEvaluator--">ProjectionEvaluator</a></span>()</code> </td> |
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| <td class="colFirst"><code>abstract <a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/expressions/Projections.ProjectionEvaluator.html#project-org.apache.iceberg.expressions.Expression-">project</a></span>(<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr)</code> |
| <div class="block">Project the given row expression to a partition expression.</div> |
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| <code><a href="../../../../org/apache/iceberg/expressions/ExpressionVisitors.ExpressionVisitor.html#alwaysFalse--">alwaysFalse</a>, <a href="../../../../org/apache/iceberg/expressions/ExpressionVisitors.ExpressionVisitor.html#alwaysTrue--">alwaysTrue</a>, <a href="../../../../org/apache/iceberg/expressions/ExpressionVisitors.ExpressionVisitor.html#and-R-R-">and</a>, <a href="../../../../org/apache/iceberg/expressions/ExpressionVisitors.ExpressionVisitor.html#not-R-">not</a>, <a href="../../../../org/apache/iceberg/expressions/ExpressionVisitors.ExpressionVisitor.html#or-R-R-">or</a>, <a href="../../../../org/apache/iceberg/expressions/ExpressionVisitors.ExpressionVisitor.html#predicate-org.apache.iceberg.expressions.BoundPredicate-">predicate</a>, <a href="../../../../org/apache/iceberg/expressions/ExpressionVisitors.ExpressionVisitor.html#predicate-org.apache.iceberg.expressions.UnboundPredicate-">predicate</a></code></li> |
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| <h4>ProjectionEvaluator</h4> |
| <pre>public ProjectionEvaluator()</pre> |
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| <h4>project</h4> |
| <pre>public abstract <a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> project(<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr)</pre> |
| <div class="block">Project the given row expression to a partition expression.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>expr</code> - an expression on data rows</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an expression on partition data (depends on the projection)</dd> |
| </dl> |
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