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| <h1 title="Package" class="title">Package org.apache.drill.exec.physical.impl.scan.file</h1> |
| <div class="docSummary"> |
| <div class="block">Handles optional file metadata columns: implicit columns and |
| partition columns.</div> |
| </div> |
| <p>See: <a href="#package.description">Description</a></p> |
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| <table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="Interface Summary table, listing interfaces, and an explanation"> |
| <caption><span>Interface Summary</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Interface</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/FileScanFramework.FileSchemaNegotiator.html" title="interface in org.apache.drill.exec.physical.impl.scan.file">FileScanFramework.FileSchemaNegotiator</a></td> |
| <td class="colLast"> |
| <div class="block">The file schema negotiator adds no behavior at present, but is |
| created as a placeholder anticipating the need for file-specific |
| behavior later.</div> |
| </td> |
| </tr> |
| </tbody> |
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| <tr> |
| <th class="colFirst" scope="col">Class</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/FileMetadata.html" title="class in org.apache.drill.exec.physical.impl.scan.file">FileMetadata</a></td> |
| <td class="colLast"> |
| <div class="block">Specify the file name and optional selection root.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/FileMetadataColumn.html" title="class in org.apache.drill.exec.physical.impl.scan.file">FileMetadataColumn</a></td> |
| <td class="colLast"> |
| <div class="block">Represents projection column which resolved to a file metadata |
| (AKA "implicit") column such as "filename", "fqn", etc.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/FileMetadataColumnDefn.html" title="class in org.apache.drill.exec.physical.impl.scan.file">FileMetadataColumnDefn</a></td> |
| <td class="colLast"> |
| <div class="block">Definition of a file metadata (AKA "implicit") column for this query.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/FileMetadataColumnsParser.html" title="class in org.apache.drill.exec.physical.impl.scan.file">FileMetadataColumnsParser</a></td> |
| <td class="colLast"> |
| <div class="block">Parses the implicit file metadata columns out of a project list, |
| and marks them for special handling by the file metadata manager.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/FileScanFramework.html" title="class in org.apache.drill.exec.physical.impl.scan.file">FileScanFramework</a></td> |
| <td class="colLast"> |
| <div class="block">The file scan framework adds into the scan framework support for implicit |
| reading from DFS splits (a file and a block).</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/FileScanFramework.FileReaderFactory.html" title="class in org.apache.drill.exec.physical.impl.scan.file">FileScanFramework.FileReaderFactory</a></td> |
| <td class="colLast"> |
| <div class="block">Iterates over the splits for the present scan.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/FileScanFramework.FileRowSetContext.html" title="class in org.apache.drill.exec.physical.impl.scan.file">FileScanFramework.FileRowSetContext</a></td> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/FileScanFramework.FileScanBuilder.html" title="class in org.apache.drill.exec.physical.impl.scan.file">FileScanFramework.FileScanBuilder</a></td> |
| <td class="colLast"> |
| <div class="block">Options for a file-based scan.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/FileScanFramework.FileSchemaNegotiatorImpl.html" title="class in org.apache.drill.exec.physical.impl.scan.file">FileScanFramework.FileSchemaNegotiatorImpl</a></td> |
| <td class="colLast"> |
| <div class="block">Implementation of the file-level schema negotiator.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/ImplicitColumnManager.html" title="class in org.apache.drill.exec.physical.impl.scan.file">ImplicitColumnManager</a></td> |
| <td class="colLast"> |
| <div class="block">Manages the insertion of file metadata (AKA "implicit" and partition) columns.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/ImplicitColumnManager.ImplicitColumnOptions.html" title="class in org.apache.drill.exec.physical.impl.scan.file">ImplicitColumnManager.ImplicitColumnOptions</a></td> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/MetadataColumn.html" title="class in org.apache.drill.exec.physical.impl.scan.file">MetadataColumn</a></td> |
| <td class="colLast"> |
| <div class="block">Resolved value for a metadata column (implicit file or partition column.) Resolution |
| here means identifying a value for the column.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/file/PartitionColumn.html" title="class in org.apache.drill.exec.physical.impl.scan.file">PartitionColumn</a></td> |
| <td class="colLast"> |
| <div class="block">Represents a partition column (usually dir0, dir1, ...).</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </li> |
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| <h2 title="Package org.apache.drill.exec.physical.impl.scan.file Description">Package org.apache.drill.exec.physical.impl.scan.file Description</h2> |
| <div class="block">Handles optional file metadata columns: implicit columns and |
| partition columns. Not all data sources are files, and so not |
| all support these columns</div> |
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