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| <div class="subTitle">org.apache.calcite.model</div> |
| <h2 title="类 JsonView" class="title">类 JsonView</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="java.lang中的类或接口">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../org/apache/calcite/model/JsonTable.html" title="org.apache.calcite.model中的类">org.apache.calcite.model.JsonTable</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.model.JsonView</li> |
| </ul> |
| </li> |
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| <pre>public class <span class="typeNameLabel">JsonView</span> |
| extends <a href="../../../../org/apache/calcite/model/JsonTable.html" title="org.apache.calcite.model中的类">JsonTable</a></pre> |
| <div class="block">View schema element. |
| |
| <p>Like base class <a href="../../../../org/apache/calcite/model/JsonTable.html" title="org.apache.calcite.model中的类"><code>JsonTable</code></a>, |
| occurs within <a href="../../../../org/apache/calcite/model/JsonMapSchema.html#tables"><code>JsonMapSchema.tables</code></a>. |
| |
| <h2>Modifiable views</h2> |
| |
| <p>A view is modifiable if contains only SELECT, FROM, WHERE (no JOIN, |
| aggregation or sub-queries) and every column: |
| |
| <ul> |
| <li>is specified once in the SELECT clause; or |
| <li>occurs in the WHERE clause with a column = literal predicate; or |
| <li>is nullable. |
| </ul> |
| |
| <p>The second clause allows Calcite to automatically provide the correct |
| value for hidden columns. It is useful in, say, a multi-tenant environment, |
| where the <code>tenantId</code> column is hidden, mandatory (NOT NULL), and has a |
| constant value for a particular view. |
| |
| <p>Errors regarding modifiable views: |
| |
| <ul> |
| <li>If a view is marked modifiable: true and is not modifiable, Calcite |
| throws an error while reading the schema. |
| <li>If you submit an INSERT, UPDATE or UPSERT command to a non-modifiable |
| view, Calcite throws an error when validating the statement. |
| <li>If a DML statement creates a row that would not appear in the view |
| (for example, a row in female_emps, above, with gender = 'M'), Calcite |
| throws an error when executing the statement. |
| </ul></div> |
| <dl> |
| <dt><span class="seeLabel">另请参阅:</span></dt> |
| <dd><a href="../../../../org/apache/calcite/model/JsonRoot.html" title="org.apache.calcite.model中的类"><code>Description of schema elements</code></a></dd> |
| </dl> |
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| <!-- =========== FIELD SUMMARY =========== --> |
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| <h3>字段概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="字段概要表, 列表字段和解释"> |
| <caption><span>字段</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符和类型</th> |
| <th class="colLast" scope="col">字段和说明</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="java.lang中的类或接口">Boolean</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/model/JsonView.html#modifiable">modifiable</a></span></code> |
| <div class="block">Whether this view should allow INSERT requests.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/model/JsonView.html#path">path</a></span></code> |
| <div class="block">Schema name(s) to use when resolving query.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/model/JsonView.html#sql">sql</a></span></code> |
| <div class="block">SQL query that is the definition of the view.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="fields.inherited.from.class.org.apache.calcite.model.JsonTable"> |
| <!-- --> |
| </a> |
| <h3>从类继承的字段 org.apache.calcite.model.<a href="../../../../org/apache/calcite/model/JsonTable.html" title="org.apache.calcite.model中的类">JsonTable</a></h3> |
| <code><a href="../../../../org/apache/calcite/model/JsonTable.html#columns">columns</a>, <a href="../../../../org/apache/calcite/model/JsonTable.html#name">name</a>, <a href="../../../../org/apache/calcite/model/JsonTable.html#stream">stream</a></code></li> |
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| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.summary"> |
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| </a> |
| <h3>构造器概要</h3> |
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| <caption><span>构造器</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">构造器和说明</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/model/JsonView.html#JsonView--">JsonView</a></span>()</code> </td> |
| </tr> |
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| </a> |
| <h3>方法概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释"> |
| <caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符和类型</th> |
| <th class="colLast" scope="col">方法和说明</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/model/JsonView.html#accept-org.apache.calcite.model.ModelHandler-">accept</a></span>(<a href="../../../../org/apache/calcite/model/ModelHandler.html" title="org.apache.calcite.model中的类">ModelHandler</a> handler)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/model/JsonView.html#getSql--">getSql</a></span>()</code> |
| <div class="block">Returns the SQL query as a string, concatenating a list of lines if |
| necessary.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/model/JsonView.html#toString--">toString</a></span>()</code> </td> |
| </tr> |
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| <!-- --> |
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| <h3>从类继承的方法 java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li> |
| </ul> |
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| <div class="details"> |
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| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
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| <li class="blockList"><a name="field.detail"> |
| <!-- --> |
| </a> |
| <h3>字段详细资料</h3> |
| <a name="sql"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>sql</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a> sql</pre> |
| <div class="block">SQL query that is the definition of the view. |
| |
| <p>Must be a string or a list of strings (which are concatenated into a |
| multi-line SQL string, separated by newlines).</div> |
| </li> |
| </ul> |
| <a name="path"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>path</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>> path</pre> |
| <div class="block">Schema name(s) to use when resolving query. |
| |
| <p>If not specified, defaults to current schema.</div> |
| </li> |
| </ul> |
| <a name="modifiable"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>modifiable</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="java.lang中的类或接口">Boolean</a> modifiable</pre> |
| <div class="block">Whether this view should allow INSERT requests. |
| |
| <p>The values have the following meanings: |
| <ul> |
| <li>If true, Calcite throws an error when validating the schema if the |
| view is not modifiable. |
| <li>If null, Calcite deduces whether the view is modifiable. |
| <li>If false, Calcite will not allow inserts. |
| </ul> |
| |
| <p>The default value is <code>null</code>.</div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| <h3>构造器详细资料</h3> |
| <a name="JsonView--"> |
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| </a> |
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| <h4>JsonView</h4> |
| <pre>public JsonView()</pre> |
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| <h3>方法详细资料</h3> |
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| <!-- --> |
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| <h4>accept</h4> |
| <pre>public void accept(<a href="../../../../org/apache/calcite/model/ModelHandler.html" title="org.apache.calcite.model中的类">ModelHandler</a> handler)</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">指定者:</span></dt> |
| <dd><code><a href="../../../../org/apache/calcite/model/JsonTable.html#accept-org.apache.calcite.model.ModelHandler-">accept</a></code> 在类中 <code><a href="../../../../org/apache/calcite/model/JsonTable.html" title="org.apache.calcite.model中的类">JsonTable</a></code></dd> |
| </dl> |
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| <a name="toString--"> |
| <!-- --> |
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| <h4>toString</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a> toString()</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">覆盖:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口">toString</a></code> 在类中 <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></code></dd> |
| </dl> |
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| <!-- --> |
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| <li class="blockList"> |
| <h4>getSql</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a> getSql()</pre> |
| <div class="block">Returns the SQL query as a string, concatenating a list of lines if |
| necessary.</div> |
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