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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.iceberg.expressions</a></div> |
| <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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| <th class="colFirst" scope="col">Modifier and Type</th> |
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| <td class="colFirst"><code>static boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#equivalent(org.apache.iceberg.expressions.Expression,org.apache.iceberg.expressions.Expression,org.apache.iceberg.types.Types.StructType,boolean)">equivalent</a></span>​(<a href="Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> left, |
| <a href="Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> right, |
| <a href="../types/Types.StructType.html" title="class in org.apache.iceberg.types">Types.StructType</a> struct, |
| boolean caseSensitive)</code></th> |
| <td class="colLast"> |
| <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="Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sanitize(org.apache.iceberg.expressions.Expression)">sanitize</a></span>​(<a href="Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr)</code></th> |
| <td class="colLast"> |
| <div class="block">Produces an unbound <a href="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> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#selectsPartitions(org.apache.iceberg.expressions.Expression,org.apache.iceberg.PartitionSpec,boolean)">selectsPartitions</a></span>​(<a href="Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr, |
| <a href="../PartitionSpec.html" title="class in org.apache.iceberg">PartitionSpec</a> spec, |
| boolean caseSensitive)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns whether an expression selects whole partitions for a partition spec.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static java.lang.String</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toSanitizedString(org.apache.iceberg.expressions.Expression)">toSanitizedString</a></span>​(<a href="Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr)</code></th> |
| <td class="colLast"> |
| <div class="block">Produces a sanitized expression string with the same structure, but with data values replaced by descriptions.</div> |
| </td> |
| </tr> |
| </table> |
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| <!-- --> |
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| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
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| <h3>Method Detail</h3> |
| <a id="sanitize(org.apache.iceberg.expressions.Expression)"> |
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| <h4>sanitize</h4> |
| <pre class="methodSignature">public static <a href="Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> sanitize​(<a href="Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr)</pre> |
| <div class="block">Produces an unbound <a href="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> |
| </ul> |
| <a id="toSanitizedString(org.apache.iceberg.expressions.Expression)"> |
| <!-- --> |
| </a> |
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| <h4>toSanitizedString</h4> |
| <pre class="methodSignature">public static java.lang.String toSanitizedString​(<a href="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 id="equivalent(org.apache.iceberg.expressions.Expression,org.apache.iceberg.expressions.Expression,org.apache.iceberg.types.Types.StructType,boolean)"> |
| <!-- --> |
| </a> |
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| <h4>equivalent</h4> |
| <pre class="methodSignature">public static boolean equivalent​(<a href="Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> left, |
| <a href="Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> right, |
| <a href="../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 id="selectsPartitions(org.apache.iceberg.expressions.Expression,org.apache.iceberg.PartitionSpec,boolean)"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>selectsPartitions</h4> |
| <pre class="methodSignature">public static boolean selectsPartitions​(<a href="Expression.html" title="interface in org.apache.iceberg.expressions">Expression</a> expr, |
| <a href="../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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