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| <div class="subTitle">org.apache.beam.sdk.extensions.sql.meta</div> |
| <h2 title="Interface CustomTableResolver" class="title">Interface CustomTableResolver</h2> |
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| <dt>All Superinterfaces:</dt> |
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| <dd><a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/datacatalog/DataCatalogTableProvider.html" title="class in org.apache.beam.sdk.extensions.sql.meta.provider.datacatalog">DataCatalogTableProvider</a>, <a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/FullNameTableProvider.html" title="class in org.apache.beam.sdk.extensions.sql.meta.provider">FullNameTableProvider</a></dd> |
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| <pre>public interface <span class="typeNameLabel">CustomTableResolver</span> |
| extends <a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/TableProvider.html" title="interface in org.apache.beam.sdk.extensions.sql.meta.provider">TableProvider</a></pre> |
| <div class="block">Interface that table providers can implement if they require custom table name resolution. |
| |
| <p><a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/CustomTableResolver.html#registerKnownTableNames-java.util.List-"><code>registerKnownTableNames(List)</code></a> is called by the parser/planner and takes the list of |
| all tables mentioned in the query. Then when normal Calcite lifecycle is executed the table |
| provider can now check against this list and perform custom resolution. This is a workaround for |
| lack of context in Calcite's logic, e.g. it's impossible to receive the whole table name at once, |
| or understand that it has done querying sub-schemas and expects a table.</div> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/CustomTableResolver.html#registerKnownTableNames-java.util.List-">registerKnownTableNames</a></span>(java.util.List<<a href="../../../../../../../org/apache/beam/sdk/extensions/sql/impl/TableName.html" title="class in org.apache.beam.sdk.extensions.sql.impl">TableName</a>> tableNames)</code> |
| <div class="block">Register the table names as extracted from the FROM clause.</div> |
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| <h3>Methods inherited from interface org.apache.beam.sdk.extensions.sql.meta.provider.<a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/TableProvider.html" title="interface in org.apache.beam.sdk.extensions.sql.meta.provider">TableProvider</a></h3> |
| <code><a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/TableProvider.html#buildBeamSqlTable-org.apache.beam.sdk.extensions.sql.meta.Table-">buildBeamSqlTable</a>, <a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/TableProvider.html#createTable-org.apache.beam.sdk.extensions.sql.meta.Table-">createTable</a>, <a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/TableProvider.html#dropTable-java.lang.String-">dropTable</a>, <a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/TableProvider.html#getSubProvider-java.lang.String-">getSubProvider</a>, <a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/TableProvider.html#getSubProviders--">getSubProviders</a>, <a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/TableProvider.html#getTable-java.lang.String-">getTable</a>, <a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/TableProvider.html#getTables--">getTables</a>, <a href="../../../../../../../org/apache/beam/sdk/extensions/sql/meta/provider/TableProvider.html#getTableType--">getTableType</a></code></li> |
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| <h4>registerKnownTableNames</h4> |
| <pre>void registerKnownTableNames(java.util.List<<a href="../../../../../../../org/apache/beam/sdk/extensions/sql/impl/TableName.html" title="class in org.apache.beam.sdk.extensions.sql.impl">TableName</a>> tableNames)</pre> |
| <div class="block">Register the table names as extracted from the FROM clause. |
| |
| <p>Calcite doesn't provide these full names to table providers and queries them with individual |
| parts of the identifiers without giving any extra context. So if a table provider needs to |
| implement some custom table name resolution strategy it doesn't have information to do so. E.g. |
| if you want to take the compound SQL identifiers that were originally split by dots, join them |
| into a single string, and then query a back-end service, this interface makes this possible.</div> |
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