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| <div class="subTitle">org.apache.calcite.plan</div> |
| <h2 title="Class Strong" class="title">Class Strong</h2> |
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| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
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| <li>org.apache.calcite.plan.Strong</li> |
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| <pre>public class <span class="typeNameLabel">Strong</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Utilities for strong predicates. |
| |
| <p>A predicate is strong (or null-rejecting) if it is UNKNOWN if any of its |
| inputs is UNKNOWN.</p> |
| |
| <p>By the way, UNKNOWN is just the boolean form of NULL.</p> |
| |
| <p>Examples:</p> |
| <ul> |
| <li><code>UNKNOWN</code> is strong in [] (definitely null) |
| <li><code>c = 1</code> is strong in [c] (definitely null if and only if c is |
| null) |
| <li><code>c IS NULL</code> is not strong (always returns TRUE or FALSE, never |
| null) |
| <li><code>p1 AND p2</code> is strong in [p1, p2] (definitely null if either p1 |
| is null or p2 is null) |
| <li><code>p1 OR p2</code> is strong if p1 and p2 are strong |
| <li><code>c1 = 1 OR c2 IS NULL</code> is strong in [c1] (definitely null if c1 |
| is null) |
| </ul></div> |
| </li> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.Policy.html" title="enum in org.apache.calcite.plan">Strong.Policy</a></span></code> |
| <div class="block">How whether an operator's operands are null affects whether a call to |
| that operator evaluates to null.</div> |
| </td> |
| </tr> |
| </table> |
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| </ul> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#Strong--">Strong</a></span>()</code> </td> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd"> </span></span></caption> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#allStrong-java.util.List-">allStrong</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands)</code> |
| <div class="block">Returns whether all expressions in a list are strong.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#isNotTrue-org.apache.calcite.rex.RexNode-">isNotTrue</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> node)</code> |
| <div class="block">Returns whether an expression is definitely not true.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#isNotTrue-org.apache.calcite.rex.RexNode-org.apache.calcite.util.ImmutableBitSet-">isNotTrue</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> node, |
| <a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> nullColumns)</code> |
| <div class="block">Returns whether the analyzed expression will definitely not return true |
| (equivalently, will definitely not return null or false) if |
| all of a given set of input columns are null.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#isNull-org.apache.calcite.rex.RexInputRef-">isNull</a></span>(<a href="../../../../org/apache/calcite/rex/RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a> ref)</code> |
| <div class="block">Returns whether a given input is definitely null.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#isNull-org.apache.calcite.rex.RexNode-">isNull</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> node)</code> |
| <div class="block">Returns whether an expression is definitely null.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#isNull-org.apache.calcite.rex.RexNode-org.apache.calcite.util.ImmutableBitSet-">isNull</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> node, |
| <a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> nullColumns)</code> |
| <div class="block">Returns whether the analyzed expression will definitely return null if |
| all of a given set of input columns are null.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#isStrong-org.apache.calcite.rex.RexNode-">isStrong</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e)</code> |
| <div class="block">Returns whether a given expression is strong.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/plan/Strong.html" title="class in org.apache.calcite.plan">Strong</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#of-org.apache.calcite.util.ImmutableBitSet-">of</a></span>(<a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> nullColumns)</code> |
| <div class="block">Returns a checker that consults a bit set to find out whether particular |
| inputs may be null.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/plan/Strong.Policy.html" title="enum in org.apache.calcite.plan">Strong.Policy</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#policy-org.apache.calcite.rex.RexNode-">policy</a></span>(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> rexNode)</code> |
| <div class="block">Returns how to deduce whether a particular <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex"><code>RexNode</code></a> expression is null, |
| given whether its arguments are null.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/plan/Strong.Policy.html" title="enum in org.apache.calcite.plan">Strong.Policy</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#policy-org.apache.calcite.sql.SqlKind-">policy</a></span>(<a href="../../../../org/apache/calcite/sql/SqlKind.html" title="enum in org.apache.calcite.sql">SqlKind</a> kind)</code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> |
| <div class="block"><span class="deprecationComment">Use <a href="../../../../org/apache/calcite/plan/Strong.html#policy-org.apache.calcite.rex.RexNode-"><code>policy(RexNode)</code></a> or <a href="../../../../org/apache/calcite/plan/Strong.html#policy-org.apache.calcite.sql.SqlOperator-"><code>policy(SqlOperator)</code></a></span></div> |
| </div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/plan/Strong.Policy.html" title="enum in org.apache.calcite.plan">Strong.Policy</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/Strong.html#policy-org.apache.calcite.sql.SqlOperator-">policy</a></span>(<a href="../../../../org/apache/calcite/sql/SqlOperator.html" title="class in org.apache.calcite.sql">SqlOperator</a> operator)</code> |
| <div class="block">Returns how to deduce whether a particular <a href="../../../../org/apache/calcite/sql/SqlOperator.html" title="class in org.apache.calcite.sql"><code>SqlOperator</code></a> expression is null, |
| given whether its arguments are null.</div> |
| </td> |
| </tr> |
| </table> |
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| <!-- --> |
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| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="Strong--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>Strong</h4> |
| <pre>public Strong()</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="of-org.apache.calcite.util.ImmutableBitSet-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>of</h4> |
| <pre>public static <a href="../../../../org/apache/calcite/plan/Strong.html" title="class in org.apache.calcite.plan">Strong</a> of(<a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> nullColumns)</pre> |
| <div class="block">Returns a checker that consults a bit set to find out whether particular |
| inputs may be null.</div> |
| </li> |
| </ul> |
| <a name="isNull-org.apache.calcite.rex.RexNode-org.apache.calcite.util.ImmutableBitSet-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isNull</h4> |
| <pre>public static boolean isNull(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> node, |
| <a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> nullColumns)</pre> |
| <div class="block">Returns whether the analyzed expression will definitely return null if |
| all of a given set of input columns are null.</div> |
| </li> |
| </ul> |
| <a name="isNotTrue-org.apache.calcite.rex.RexNode-org.apache.calcite.util.ImmutableBitSet-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isNotTrue</h4> |
| <pre>public static boolean isNotTrue(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> node, |
| <a href="../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a> nullColumns)</pre> |
| <div class="block">Returns whether the analyzed expression will definitely not return true |
| (equivalently, will definitely not return null or false) if |
| all of a given set of input columns are null.</div> |
| </li> |
| </ul> |
| <a name="policy-org.apache.calcite.sql.SqlKind-"> |
| <!-- --> |
| </a> |
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| <h4>policy</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a> |
| public static <a href="../../../../org/apache/calcite/plan/Strong.Policy.html" title="enum in org.apache.calcite.plan">Strong.Policy</a> policy(<a href="../../../../org/apache/calcite/sql/SqlKind.html" title="enum in org.apache.calcite.sql">SqlKind</a> kind)</pre> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> <span class="deprecationComment">Use <a href="../../../../org/apache/calcite/plan/Strong.html#policy-org.apache.calcite.rex.RexNode-"><code>policy(RexNode)</code></a> or <a href="../../../../org/apache/calcite/plan/Strong.html#policy-org.apache.calcite.sql.SqlOperator-"><code>policy(SqlOperator)</code></a></span></div> |
| <div class="block">Returns how to deduce whether a particular kind of expression is null, |
| given whether its arguments are null.</div> |
| </li> |
| </ul> |
| <a name="policy-org.apache.calcite.rex.RexNode-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>policy</h4> |
| <pre>public static <a href="../../../../org/apache/calcite/plan/Strong.Policy.html" title="enum in org.apache.calcite.plan">Strong.Policy</a> policy(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> rexNode)</pre> |
| <div class="block">Returns how to deduce whether a particular <a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex"><code>RexNode</code></a> expression is null, |
| given whether its arguments are null.</div> |
| </li> |
| </ul> |
| <a name="policy-org.apache.calcite.sql.SqlOperator-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>policy</h4> |
| <pre>public static <a href="../../../../org/apache/calcite/plan/Strong.Policy.html" title="enum in org.apache.calcite.plan">Strong.Policy</a> policy(<a href="../../../../org/apache/calcite/sql/SqlOperator.html" title="class in org.apache.calcite.sql">SqlOperator</a> operator)</pre> |
| <div class="block">Returns how to deduce whether a particular <a href="../../../../org/apache/calcite/sql/SqlOperator.html" title="class in org.apache.calcite.sql"><code>SqlOperator</code></a> expression is null, |
| given whether its arguments are null.</div> |
| </li> |
| </ul> |
| <a name="isStrong-org.apache.calcite.rex.RexNode-"> |
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| </a> |
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| <h4>isStrong</h4> |
| <pre>public static boolean isStrong(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> e)</pre> |
| <div class="block">Returns whether a given expression is strong. |
| |
| <p>Examples:</p> |
| <ul> |
| <li>Returns true for <code>c = 1</code> since it returns null if and only if |
| c is null |
| <li>Returns false for <code>c IS NULL</code> since it always returns TRUE |
| or FALSE |
| </ul></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>e</code> - Expression</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if the expression is strong, false otherwise</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="allStrong-java.util.List-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>allStrong</h4> |
| <pre>public static boolean allStrong(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> operands)</pre> |
| <div class="block">Returns whether all expressions in a list are strong.</div> |
| </li> |
| </ul> |
| <a name="isNotTrue-org.apache.calcite.rex.RexNode-"> |
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| </a> |
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| <h4>isNotTrue</h4> |
| <pre>public boolean isNotTrue(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> node)</pre> |
| <div class="block">Returns whether an expression is definitely not true.</div> |
| </li> |
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| <a name="isNull-org.apache.calcite.rex.RexNode-"> |
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| <h4>isNull</h4> |
| <pre>public boolean isNull(<a href="../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a> node)</pre> |
| <div class="block">Returns whether an expression is definitely null. |
| |
| <p>The answer is based on calls to <a href="../../../../org/apache/calcite/plan/Strong.html#isNull-org.apache.calcite.rex.RexNode-org.apache.calcite.util.ImmutableBitSet-"><code>isNull(org.apache.calcite.rex.RexNode, org.apache.calcite.util.ImmutableBitSet)</code></a> for its constituent |
| expressions, and you may override methods to test hypotheses such as |
| "if <code>x</code> is null, is <code>x + y</code> null?</div> |
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| <h4>isNull</h4> |
| <pre>public boolean isNull(<a href="../../../../org/apache/calcite/rex/RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a> ref)</pre> |
| <div class="block">Returns whether a given input is definitely null.</div> |
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