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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.sql.type</a></div> |
| <h2 title="Class SqlTypeTransforms" class="title">Class SqlTypeTransforms</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
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| <li>org.apache.calcite.sql.type.SqlTypeTransforms</li> |
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| <pre>public abstract class <span class="typeNameLabel">SqlTypeTransforms</span> |
| extends java.lang.Object</pre> |
| <div class="block">SqlTypeTransforms defines a number of reusable instances of |
| <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type"><code>SqlTypeTransform</code></a>. |
| |
| <p>NOTE: avoid anonymous inner classes here except for unique, |
| non-generalizable strategies; anything else belongs in a reusable top-level |
| class. If you find yourself copying and pasting an existing strategy's |
| anonymous inner class, you're making a mistake.</div> |
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| <h3>Field Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#FORCE_NULLABLE">FORCE_NULLABLE</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Parameter type-inference transform strategy where a derived type is |
| transformed into the same type with nulls allowed.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#LEAST_NULLABLE">LEAST_NULLABLE</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Type-inference strategy whereby the result is NOT NULL if any of |
| the arguments is NOT NULL; otherwise the type is unchanged.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#ONLY_COLUMN">ONLY_COLUMN</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Parameter type-inference transform strategy where a derived type must be |
| a struct type with precisely one field and the returned type is the type |
| of that field.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#TO_MULTISET">TO_MULTISET</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Parameter type-inference transform strategy that wraps a given type |
| in a multiset.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#TO_MULTISET_ELEMENT_TYPE">TO_MULTISET_ELEMENT_TYPE</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Parameter type-inference transform strategy where a derived type must be |
| a multiset type and the returned type is the multiset's element type.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#TO_NOT_NULLABLE">TO_NOT_NULLABLE</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Parameter type-inference transform strategy where a derived type is |
| transformed into the same type but not nullable.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#TO_NULLABLE">TO_NULLABLE</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Parameter type-inference transform strategy where a derived type is |
| transformed into the same type but nullable if any of a calls operands is |
| nullable</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#TO_NULLABLE_ALL">TO_NULLABLE_ALL</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Parameter type-inference transform strategy where a derived type is |
| transformed into the same type, but nullable if and only if all of a call's |
| operands are nullable.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#TO_VARYING">TO_VARYING</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Type-inference strategy whereby the result type of a call is VARYING the |
| type given.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
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| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">SqlTypeTransforms</a></span>()</code></th> |
| <td class="colLast"> </td> |
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| <pre>public static final <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a> TO_NULLABLE</pre> |
| <div class="block">Parameter type-inference transform strategy where a derived type is |
| transformed into the same type but nullable if any of a calls operands is |
| nullable</div> |
| </li> |
| </ul> |
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| <!-- --> |
| </a> |
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| <h4>TO_NULLABLE_ALL</h4> |
| <pre>public static final <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a> TO_NULLABLE_ALL</pre> |
| <div class="block">Parameter type-inference transform strategy where a derived type is |
| transformed into the same type, but nullable if and only if all of a call's |
| operands are nullable.</div> |
| </li> |
| </ul> |
| <a id="TO_NOT_NULLABLE"> |
| <!-- --> |
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| <h4>TO_NOT_NULLABLE</h4> |
| <pre>public static final <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a> TO_NOT_NULLABLE</pre> |
| <div class="block">Parameter type-inference transform strategy where a derived type is |
| transformed into the same type but not nullable.</div> |
| </li> |
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| <!-- --> |
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| <h4>FORCE_NULLABLE</h4> |
| <pre>public static final <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a> FORCE_NULLABLE</pre> |
| <div class="block">Parameter type-inference transform strategy where a derived type is |
| transformed into the same type with nulls allowed.</div> |
| </li> |
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| <!-- --> |
| </a> |
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| <li class="blockList"> |
| <h4>LEAST_NULLABLE</h4> |
| <pre>public static final <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a> LEAST_NULLABLE</pre> |
| <div class="block">Type-inference strategy whereby the result is NOT NULL if any of |
| the arguments is NOT NULL; otherwise the type is unchanged.</div> |
| </li> |
| </ul> |
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| <!-- --> |
| </a> |
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| <h4>TO_VARYING</h4> |
| <pre>public static final <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a> TO_VARYING</pre> |
| <div class="block">Type-inference strategy whereby the result type of a call is VARYING the |
| type given. The length returned is the same as length of the first |
| argument. Return type will have same nullability as input type |
| nullability. First Arg must be of string type.</div> |
| </li> |
| </ul> |
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| <!-- --> |
| </a> |
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| <h4>TO_MULTISET_ELEMENT_TYPE</h4> |
| <pre>public static final <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a> TO_MULTISET_ELEMENT_TYPE</pre> |
| <div class="block">Parameter type-inference transform strategy where a derived type must be |
| a multiset type and the returned type is the multiset's element type.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="MultisetSqlType.html#getComponentType()"><code>MultisetSqlType.getComponentType()</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
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| <!-- --> |
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| <h4>TO_MULTISET</h4> |
| <pre>public static final <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a> TO_MULTISET</pre> |
| <div class="block">Parameter type-inference transform strategy that wraps a given type |
| in a multiset.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../rel/type/RelDataTypeFactory.html#createMultisetType(org.apache.calcite.rel.type.RelDataType,long)"><code>RelDataTypeFactory.createMultisetType(RelDataType, long)</code></a></dd> |
| </dl> |
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| <h4>ONLY_COLUMN</h4> |
| <pre>public static final <a href="SqlTypeTransform.html" title="interface in org.apache.calcite.sql.type">SqlTypeTransform</a> ONLY_COLUMN</pre> |
| <div class="block">Parameter type-inference transform strategy where a derived type must be |
| a struct type with precisely one field and the returned type is the type |
| of that field.</div> |
| </li> |
| </ul> |
| </li> |
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| <pre>public SqlTypeTransforms()</pre> |
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