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| <h2 title="Class ExpressionUtil" class="title">Class ExpressionUtil</h2> |
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| <pre>public class <span class="typeNameLabel">ExpressionUtil</span> |
| extends java.lang.Object</pre> |
| <div class="block">Expression utility methods.</div> |
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| <h3>Method Summary</h3> |
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| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/expressions/ExpressionUtil.html#equivalent-org.apache.iceberg.expressions.Expression-org.apache.iceberg.expressions.Expression-org.apache.iceberg.types.Types.StructType-boolean-">equivalent</a></span>(<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> left, |
| <a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> right, |
| <a href="../../../../org/apache/iceberg/types/Types.StructType.html" title="class in org.apache.iceberg.types">Types.StructType</a> struct, |
| boolean caseSensitive)</code> |
| <div class="block">Returns whether two unbound expressions will accept the same inputs.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <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/ExpressionUtil.html#sanitize-org.apache.iceberg.expressions.Expression-">sanitize</a></span>(<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr)</code> |
| <div class="block">Produces an unbound <a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions"><code>Expression</code></a> with the same structure, but with data values replaced |
| by descriptions.</div> |
| </td> |
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| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/expressions/ExpressionUtil.html#selectsPartitions-org.apache.iceberg.expressions.Expression-org.apache.iceberg.PartitionSpec-boolean-">selectsPartitions</a></span>(<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr, |
| <a href="../../../../org/apache/iceberg/PartitionSpec.html" title="class in org.apache.iceberg">PartitionSpec</a> spec, |
| boolean caseSensitive)</code> |
| <div class="block">Returns whether an expression selects whole partitions for a partition spec.</div> |
| </td> |
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| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static java.lang.String</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/iceberg/expressions/ExpressionUtil.html#toSanitizedString-org.apache.iceberg.expressions.Expression-">toSanitizedString</a></span>(<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr)</code> |
| <div class="block">Produces a sanitized expression string with the same structure, but with data values replaced |
| by descriptions.</div> |
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| <h4>sanitize</h4> |
| <pre>public static <a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> sanitize(<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr)</pre> |
| <div class="block">Produces an unbound <a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions"><code>Expression</code></a> with the same structure, but with data values replaced |
| by descriptions. |
| |
| <p>Numbers are replaced with magnitude and type, string-like values are replaced by hashes, and |
| date/time values are replaced by the type.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>expr</code> - an Expression to sanitize</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a sanitized Expression</dd> |
| </dl> |
| </li> |
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| <h4>toSanitizedString</h4> |
| <pre>public static java.lang.String toSanitizedString(<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr)</pre> |
| <div class="block">Produces a sanitized expression string with the same structure, but with data values replaced |
| by descriptions. |
| |
| <p>Numbers are replaced with magnitude and type, string-like values are replaced by hashes, and |
| date/time values are replaced by the type.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>expr</code> - an Expression to sanitize</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a sanitized expression string</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="equivalent-org.apache.iceberg.expressions.Expression-org.apache.iceberg.expressions.Expression-org.apache.iceberg.types.Types.StructType-boolean-"> |
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| <h4>equivalent</h4> |
| <pre>public static boolean equivalent(<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> left, |
| <a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> right, |
| <a href="../../../../org/apache/iceberg/types/Types.StructType.html" title="class in org.apache.iceberg.types">Types.StructType</a> struct, |
| boolean caseSensitive)</pre> |
| <div class="block">Returns whether two unbound expressions will accept the same inputs. |
| |
| <p>If this returns true, the expressions are guaranteed to return the same evaluation for the |
| same input. However, if this returns false the expressions may return the same evaluation for |
| the same input. That is, expressions may be equivalent even if this returns false.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>left</code> - an unbound expression</dd> |
| <dd><code>right</code> - an unbound expression</dd> |
| <dd><code>struct</code> - a struct type for binding</dd> |
| <dd><code>caseSensitive</code> - whether to bind expressions using case-sensitive matching</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the expressions are equivalent</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="selectsPartitions-org.apache.iceberg.expressions.Expression-org.apache.iceberg.PartitionSpec-boolean-"> |
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| <h4>selectsPartitions</h4> |
| <pre>public static boolean selectsPartitions(<a href="../../../../org/apache/iceberg/expressions/Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr, |
| <a href="../../../../org/apache/iceberg/PartitionSpec.html" title="class in org.apache.iceberg">PartitionSpec</a> spec, |
| boolean caseSensitive)</pre> |
| <div class="block">Returns whether an expression selects whole partitions for a partition spec. |
| |
| <p>For example, ts < '2021-03-09T10:00:00.000' selects whole partitions in an hourly spec, |
| [hours(ts)], but does not select whole partitions in a daily spec, [days(ts)].</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>expr</code> - an unbound expression</dd> |
| <dd><code>spec</code> - a partition spec</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the expression will select whole partitions in the given spec</dd> |
| </dl> |
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