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| <div class="subTitle">org.apache.drill.exec.physical.impl.scan.v3.file</div> |
| <h2 title="Class ImplicitColumnResolver" class="title">Class ImplicitColumnResolver</h2> |
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| <li>org.apache.drill.exec.physical.impl.scan.v3.file.ImplicitColumnResolver</li> |
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| <pre>public class <span class="typeNameLabel">ImplicitColumnResolver</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">Manages the resolution of implicit file metadata and partition columns. |
| Parses the file metadata columns from the projection list. Creates a parse |
| result which drives loading data into vectors. Supports renaming the columns |
| via session options. |
| <p> |
| Lifecycle: |
| <ul> |
| <li>At the start of the scan, the parser looks for implicit and partition |
| columns in the scan schema, resolving matching columns to be implicit |
| columns, and building up a description of those columns for use later.</li> |
| <li>If the projection list contains a wildcard, it can also contain implicit |
| columns. If running in legacy mode, inserts partition columns when the query |
| contains a wildcard.</li> |
| <li>On each file (on each reader), the parse result allows generating actual |
| values for each column, which are then written into the corresponding value |
| vectors.</li> |
| </ul> |
| <p> |
| Assumes that the partition count is fixed at runtime; that it is determined |
| at plan time and provided in the plan. This ensures that the schema is stable |
| across readers: even a reader at the top-most partition will produce columns |
| for all partitions if using legacy mode wildcard expansion.</div> |
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| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.ImplicitColumnOptions.html" title="class in org.apache.drill.exec.physical.impl.scan.v3.file">ImplicitColumnResolver.ImplicitColumnOptions</a></span></code> </td> |
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| <tr class="rowColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.ParseResult.html" title="class in org.apache.drill.exec.physical.impl.scan.v3.file">ImplicitColumnResolver.ParseResult</a></span></code> |
| <div class="block">The result of scanning the scan output schema to identify implicit and |
| partition columns.</div> |
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| <td class="colFirst"><code>static <a href="../../../../../../../../../org/apache/drill/common/types/TypeProtos.MajorType.html" title="class in org.apache.drill.common.types">TypeProtos.MajorType</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.html#IMPLICIT_COL_TYPE">IMPLICIT_COL_TYPE</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../../../../../../org/apache/drill/common/types/TypeProtos.MajorType.html" title="class in org.apache.drill.common.types">TypeProtos.MajorType</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.html#OPTIONAL_INTERNAL_COL_TYPE">OPTIONAL_INTERNAL_COL_TYPE</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../../../../../org/apache/drill/common/types/TypeProtos.MajorType.html" title="class in org.apache.drill.common.types">TypeProtos.MajorType</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.html#PARTITION_COL_TYPE">PARTITION_COL_TYPE</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.html#ImplicitColumnResolver-org.apache.drill.exec.physical.impl.scan.v3.file.ImplicitColumnResolver.ImplicitColumnOptions-org.apache.drill.common.exceptions.CustomErrorContext-">ImplicitColumnResolver</a></span>(<a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.ImplicitColumnOptions.html" title="class in org.apache.drill.exec.physical.impl.scan.v3.file">ImplicitColumnResolver.ImplicitColumnOptions</a> options, |
| <a href="../../../../../../../../../org/apache/drill/common/exceptions/CustomErrorContext.html" title="interface in org.apache.drill.common.exceptions">CustomErrorContext</a> errorContext)</code> </td> |
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| <td class="colFirst"><code><a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.ParseResult.html" title="class in org.apache.drill.exec.physical.impl.scan.v3.file">ImplicitColumnResolver.ParseResult</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.html#parse-org.apache.drill.exec.physical.impl.scan.v3.schema.ScanSchemaTracker-">parse</a></span>(<a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/schema/ScanSchemaTracker.html" title="interface in org.apache.drill.exec.physical.impl.scan.v3.schema">ScanSchemaTracker</a> tracker)</code> </td> |
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| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.html#partitionName-int-">partitionName</a></span>(int partition)</code> </td> |
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| <h4>IMPLICIT_COL_TYPE</h4> |
| <pre>public static final <a href="../../../../../../../../../org/apache/drill/common/types/TypeProtos.MajorType.html" title="class in org.apache.drill.common.types">TypeProtos.MajorType</a> IMPLICIT_COL_TYPE</pre> |
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| <h4>PARTITION_COL_TYPE</h4> |
| <pre>public static final <a href="../../../../../../../../../org/apache/drill/common/types/TypeProtos.MajorType.html" title="class in org.apache.drill.common.types">TypeProtos.MajorType</a> PARTITION_COL_TYPE</pre> |
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| <h4>OPTIONAL_INTERNAL_COL_TYPE</h4> |
| <pre>public static final <a href="../../../../../../../../../org/apache/drill/common/types/TypeProtos.MajorType.html" title="class in org.apache.drill.common.types">TypeProtos.MajorType</a> OPTIONAL_INTERNAL_COL_TYPE</pre> |
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| <h4>ImplicitColumnResolver</h4> |
| <pre>public ImplicitColumnResolver(<a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.ImplicitColumnOptions.html" title="class in org.apache.drill.exec.physical.impl.scan.v3.file">ImplicitColumnResolver.ImplicitColumnOptions</a> options, |
| <a href="../../../../../../../../../org/apache/drill/common/exceptions/CustomErrorContext.html" title="interface in org.apache.drill.common.exceptions">CustomErrorContext</a> errorContext)</pre> |
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| <h4>parse</h4> |
| <pre>public <a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/file/ImplicitColumnResolver.ParseResult.html" title="class in org.apache.drill.exec.physical.impl.scan.v3.file">ImplicitColumnResolver.ParseResult</a> parse(<a href="../../../../../../../../../org/apache/drill/exec/physical/impl/scan/v3/schema/ScanSchemaTracker.html" title="interface in org.apache.drill.exec.physical.impl.scan.v3.schema">ScanSchemaTracker</a> tracker)</pre> |
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| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> partitionName(int partition)</pre> |
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