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| <li>Summary: </li> |
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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.calcite.schema</a></div> |
| <h1 title="Interface Schema" class="title">Interface Schema</h1> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Known Subinterfaces:</dt> |
| <dd><code><a href="SchemaPlus.html" title="interface in org.apache.calcite.schema">SchemaPlus</a></code>, <code><a href="SemiMutableSchema.html" title="interface in org.apache.calcite.schema">SemiMutableSchema</a></code></dd> |
| </dl> |
| <dl class="notes"> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><code><a href="impl/AbstractSchema.html" title="class in org.apache.calcite.schema.impl">AbstractSchema</a></code>, <code><a href="../adapter/cassandra/CassandraSchema.html" title="class in org.apache.calcite.adapter.cassandra">CassandraSchema</a></code>, <code><a href="../adapter/clone/CloneSchema.html" title="class in org.apache.calcite.adapter.clone">CloneSchema</a></code>, <code><a href="../adapter/csv/CsvSchema.html" title="class in org.apache.calcite.adapter.csv">CsvSchema</a></code>, <code><a href="impl/DelegatingSchema.html" title="class in org.apache.calcite.schema.impl">DelegatingSchema</a></code>, <code><a href="../adapter/druid/DruidSchema.html" title="class in org.apache.calcite.adapter.druid">DruidSchema</a></code>, <code><a href="../adapter/elasticsearch/ElasticsearchSchema.html" title="class in org.apache.calcite.adapter.elasticsearch">ElasticsearchSchema</a></code>, <code><a href="../adapter/geode/rel/GeodeSchema.html" title="class in org.apache.calcite.adapter.geode.rel">GeodeSchema</a></code>, <code><a href="../adapter/geode/simple/GeodeSimpleSchema.html" title="class in org.apache.calcite.adapter.geode.simple">GeodeSimpleSchema</a></code>, <code><a href="../adapter/innodb/InnodbSchema.html" title="class in org.apache.calcite.adapter.innodb">InnodbSchema</a></code>, <code><a href="../adapter/jdbc/JdbcCatalogSchema.html" title="class in org.apache.calcite.adapter.jdbc">JdbcCatalogSchema</a></code>, <code><a href="../adapter/jdbc/JdbcSchema.html" title="class in org.apache.calcite.adapter.jdbc">JdbcSchema</a></code>, <code><a href="../adapter/mongodb/MongoSchema.html" title="class in org.apache.calcite.adapter.mongodb">MongoSchema</a></code>, <code><a href="../adapter/pig/PigSchema.html" title="class in org.apache.calcite.adapter.pig">PigSchema</a></code>, <code><a href="../adapter/java/ReflectiveSchema.html" title="class in org.apache.calcite.adapter.java">ReflectiveSchema</a></code>, <code><a href="../adapter/splunk/SplunkSchema.html" title="class in org.apache.calcite.adapter.splunk">SplunkSchema</a></code>, <code><a href="../adapter/tpcds/TpcdsSchema.html" title="class in org.apache.calcite.adapter.tpcds">TpcdsSchema</a></code>, <code><a href="../adapter/tpch/TpchSchema.html" title="class in org.apache.calcite.adapter.tpch">TpchSchema</a></code></dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="modifiers">public interface </span><span class="element-name type-name-label">Schema</span></div> |
| <div class="block">A namespace for tables and functions. |
| |
| <p>A schema can also contain sub-schemas, to any level of nesting. Most |
| providers have a limited number of levels; for example, most JDBC databases |
| have either one level ("schemas") or two levels ("database" and |
| "catalog").</p> |
| |
| <p>There may be multiple overloaded functions with the same name but |
| different numbers or types of parameters. |
| For this reason, <a href="#getFunctions(java.lang.String)"><code>getFunctions(java.lang.String)</code></a> returns a list of all |
| members with the same name. Calcite will call |
| <a href="Schemas.html#resolve(org.apache.calcite.rel.type.RelDataTypeFactory,java.lang.String,java.util.Collection,java.util.List)"><code>Schemas.resolve(org.apache.calcite.rel.type.RelDataTypeFactory, String, java.util.Collection, java.util.List)</code></a> |
| to choose the appropriate one.</p> |
| |
| <p>The most common and important type of member is the one with no |
| arguments and a result type that is a collection of records. This is called a |
| <dfn>relation</dfn>. It is equivalent to a table in a relational |
| database.</p> |
| |
| <p>For example, the query</p> |
| |
| <blockquote>select * from sales.emps</blockquote> |
| |
| <p>is valid if "sales" is a registered |
| schema and "emps" is a member with zero parameters and a result type |
| of <code>Collection(Record(int: "empno", String: "name"))</code>.</p> |
| |
| <p>A schema may be nested within another schema; see |
| <a href="#getSubSchema(java.lang.String)"><code>getSubSchema(String)</code></a>.</p></div> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- ======== NESTED CLASS SUMMARY ======== --> |
| <li> |
| <section class="nested-class-summary" id="nested-class-summary"> |
| <h2>Nested Class Summary</h2> |
| <div class="caption"><span>Nested Classes</span></div> |
| <div class="summary-table three-column-summary"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Interface</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color"><code>static enum </code></div> |
| <div class="col-second even-row-color"><code><a href="Schema.TableType.html" class="type-name-link" title="enum in org.apache.calcite.schema">Schema.TableType</a></code></div> |
| <div class="col-last even-row-color"> |
| <div class="block">Table type.</div> |
| </div> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <li> |
| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
| <div id="method-summary-table"> |
| <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab3" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab3', 3)" class="table-tab">Abstract Methods</button></div> |
| <div id="method-summary-table.tabpanel" role="tabpanel"> |
| <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="../linq4j/tree/Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getExpression(org.apache.calcite.schema.SchemaPlus,java.lang.String)" class="member-name-link">getExpression</a><wbr>(@Nullable <a href="SchemaPlus.html" title="interface in org.apache.calcite.schema">SchemaPlus</a> parentSchema, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> name)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns the expression by which this schema can be referenced in generated |
| code.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getFunctionNames()" class="member-name-link">getFunctionNames</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns the names of the functions in this schema.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Collection.html" title="class or interface in java.util" class="external-link">Collection</a><<a href="Function.html" title="interface in org.apache.calcite.schema">Function</a>></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getFunctions(java.lang.String)" class="member-name-link">getFunctions</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> name)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns a list of functions in this schema with the given name, or |
| an empty list if there is no such function.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>@Nullable <a href="Schema.html" title="interface in org.apache.calcite.schema">Schema</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getSubSchema(java.lang.String)" class="member-name-link">getSubSchema</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> name)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns a sub-schema with a given name, or null.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getSubSchemaNames()" class="member-name-link">getSubSchemaNames</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns the names of this schema's child schemas.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>@Nullable <a href="Table.html" title="interface in org.apache.calcite.schema">Table</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getTable(java.lang.String)" class="member-name-link">getTable</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> name)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns a table with a given name, or null if not found.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getTableNames()" class="member-name-link">getTableNames</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns the names of the tables in this schema.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>@Nullable <a href="../rel/type/RelProtoDataType.html" title="interface in org.apache.calcite.rel.type">RelProtoDataType</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getType(java.lang.String)" class="member-name-link">getType</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> name)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns a type with a given name, or null if not found.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getTypeNames()" class="member-name-link">getTypeNames</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns the names of the types in this schema.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>boolean</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#isMutable()" class="member-name-link">isMutable</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns whether the user is allowed to create new tables, functions |
| and sub-schemas in this schema, in addition to those returned automatically |
| by methods such as <a href="#getTable(java.lang.String)"><code>getTable(String)</code></a>.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="Schema.html" title="interface in org.apache.calcite.schema">Schema</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#snapshot(org.apache.calcite.schema.SchemaVersion)" class="member-name-link">snapshot</a><wbr>(<a href="SchemaVersion.html" title="interface in org.apache.calcite.schema">SchemaVersion</a> version)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Returns the snapshot of this schema as of the specified time.</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="getTable(java.lang.String)"> |
| <h3>getTable</h3> |
| <div class="member-signature"><span class="return-type">@Nullable <a href="Table.html" title="interface in org.apache.calcite.schema">Table</a></span> <span class="element-name">getTable</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> name)</span></div> |
| <div class="block">Returns a table with a given name, or null if not found.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>name</code> - Table name</dd> |
| <dt>Returns:</dt> |
| <dd>Table, or null</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getTableNames()"> |
| <h3>getTableNames</h3> |
| <div class="member-signature"><span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>></span> <span class="element-name">getTableNames</span>()</div> |
| <div class="block">Returns the names of the tables in this schema.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>Names of the tables in this schema</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getType(java.lang.String)"> |
| <h3>getType</h3> |
| <div class="member-signature"><span class="return-type">@Nullable <a href="../rel/type/RelProtoDataType.html" title="interface in org.apache.calcite.rel.type">RelProtoDataType</a></span> <span class="element-name">getType</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> name)</span></div> |
| <div class="block">Returns a type with a given name, or null if not found.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>name</code> - Table name</dd> |
| <dt>Returns:</dt> |
| <dd>Table, or null</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getTypeNames()"> |
| <h3>getTypeNames</h3> |
| <div class="member-signature"><span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>></span> <span class="element-name">getTypeNames</span>()</div> |
| <div class="block">Returns the names of the types in this schema.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>Names of the tables in this schema</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getFunctions(java.lang.String)"> |
| <h3>getFunctions</h3> |
| <div class="member-signature"><span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Collection.html" title="class or interface in java.util" class="external-link">Collection</a><<a href="Function.html" title="interface in org.apache.calcite.schema">Function</a>></span> <span class="element-name">getFunctions</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> name)</span></div> |
| <div class="block">Returns a list of functions in this schema with the given name, or |
| an empty list if there is no such function.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>name</code> - Name of function</dd> |
| <dt>Returns:</dt> |
| <dd>List of functions with given name, or empty list</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getFunctionNames()"> |
| <h3>getFunctionNames</h3> |
| <div class="member-signature"><span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>></span> <span class="element-name">getFunctionNames</span>()</div> |
| <div class="block">Returns the names of the functions in this schema.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>Names of the functions in this schema</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getSubSchema(java.lang.String)"> |
| <h3>getSubSchema</h3> |
| <div class="member-signature"><span class="return-type">@Nullable <a href="Schema.html" title="interface in org.apache.calcite.schema">Schema</a></span> <span class="element-name">getSubSchema</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> name)</span></div> |
| <div class="block">Returns a sub-schema with a given name, or null.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>name</code> - Sub-schema name</dd> |
| <dt>Returns:</dt> |
| <dd>Sub-schema with a given name, or null</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getSubSchemaNames()"> |
| <h3>getSubSchemaNames</h3> |
| <div class="member-signature"><span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>></span> <span class="element-name">getSubSchemaNames</span>()</div> |
| <div class="block">Returns the names of this schema's child schemas.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>Names of this schema's child schemas</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getExpression(org.apache.calcite.schema.SchemaPlus,java.lang.String)"> |
| <h3>getExpression</h3> |
| <div class="member-signature"><span class="return-type"><a href="../linq4j/tree/Expression.html" title="class in org.apache.calcite.linq4j.tree">Expression</a></span> <span class="element-name">getExpression</span><wbr><span class="parameters">(@Nullable <a href="SchemaPlus.html" title="interface in org.apache.calcite.schema">SchemaPlus</a> parentSchema, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> name)</span></div> |
| <div class="block">Returns the expression by which this schema can be referenced in generated |
| code.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>parentSchema</code> - Parent schema</dd> |
| <dd><code>name</code> - Name of this schema</dd> |
| <dt>Returns:</dt> |
| <dd>Expression by which this schema can be referenced in generated code</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="isMutable()"> |
| <h3>isMutable</h3> |
| <div class="member-signature"><span class="return-type">boolean</span> <span class="element-name">isMutable</span>()</div> |
| <div class="block">Returns whether the user is allowed to create new tables, functions |
| and sub-schemas in this schema, in addition to those returned automatically |
| by methods such as <a href="#getTable(java.lang.String)"><code>getTable(String)</code></a>. |
| |
| <p>Even if this method returns true, the maps are not modified. Calcite |
| stores the defined objects in a wrapper object.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>Whether the user is allowed to create new tables, functions |
| and sub-schemas in this schema</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="snapshot(org.apache.calcite.schema.SchemaVersion)"> |
| <h3>snapshot</h3> |
| <div class="member-signature"><span class="return-type"><a href="Schema.html" title="interface in org.apache.calcite.schema">Schema</a></span> <span class="element-name">snapshot</span><wbr><span class="parameters">(<a href="SchemaVersion.html" title="interface in org.apache.calcite.schema">SchemaVersion</a> version)</span></div> |
| <div class="block">Returns the snapshot of this schema as of the specified time. The |
| contents of the schema snapshot should not change over time.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>version</code> - The current schema version</dd> |
| <dt>Returns:</dt> |
| <dd>the schema snapshot.</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
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