| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <!-- NewPage --> |
| <html lang="en"> |
| <head> |
| <!-- Generated by javadoc --> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
| <title>ScanSchemaOrchestrator (Drill : 1.20.3 API)</title> |
| <link rel="stylesheet" type="text/css" href="../../../../../../../../stylesheet.css" title="Style"> |
| <script type="text/javascript" src="../../../../../../../../script.js"></script> |
| </head> |
| <body> |
| <script type="text/javascript"><!-- |
| try { |
| if (location.href.indexOf('is-external=true') == -1) { |
| parent.document.title="ScanSchemaOrchestrator (Drill : 1.20.3 API)"; |
| } |
| } |
| catch(err) { |
| } |
| //--> |
| var methods = {"i0":10,"i1":10,"i2":10,"i3":10,"i4":10,"i5":10,"i6":10,"i7":10,"i8":10}; |
| var tabs = {65535:["t0","All Methods"],2:["t2","Instance Methods"],8:["t4","Concrete Methods"]}; |
| var altColor = "altColor"; |
| var rowColor = "rowColor"; |
| var tableTab = "tableTab"; |
| var activeTableTab = "activeTableTab"; |
| </script> |
| <noscript> |
| <div>JavaScript is disabled on your browser.</div> |
| </noscript> |
| <!-- ========= START OF TOP NAVBAR ======= --> |
| <div class="topNav"><a name="navbar.top"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.top" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.top.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../../../../../../../overview-summary.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="class-use/ScanSchemaOrchestrator.html">Use</a></li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../../../../../../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../../../../../../../index-all.html">Index</a></li> |
| <li><a href="../../../../../../../../help-doc.html">Help</a></li> |
| </ul> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanLevelProjection.ScanProjectionType.html" title="enum in org.apache.drill.exec.physical.impl.scan.project"><span class="typeNameLink">Prev Class</span></a></li> |
| <li><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.ScanOrchestratorBuilder.html" title="class in org.apache.drill.exec.physical.impl.scan.project"><span class="typeNameLink">Next Class</span></a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../../../../../../../index.html?org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html" target="_top">Frames</a></li> |
| <li><a href="ScanSchemaOrchestrator.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_top"> |
| <li><a href="../../../../../../../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_top"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li><a href="#nested.class.summary">Nested</a> | </li> |
| <li><a href="#field.summary">Field</a> | </li> |
| <li><a href="#constructor.summary">Constr</a> | </li> |
| <li><a href="#method.summary">Method</a></li> |
| </ul> |
| <ul class="subNavList"> |
| <li>Detail: </li> |
| <li><a href="#field.detail">Field</a> | </li> |
| <li><a href="#constructor.detail">Constr</a> | </li> |
| <li><a href="#method.detail">Method</a></li> |
| </ul> |
| </div> |
| <a name="skip.navbar.top"> |
| <!-- --> |
| </a></div> |
| <!-- ========= END OF TOP NAVBAR ========= --> |
| <!-- ======== START OF CLASS DATA ======== --> |
| <div class="header"> |
| <div class="subTitle">org.apache.drill.exec.physical.impl.scan.project</div> |
| <h2 title="Class ScanSchemaOrchestrator" class="title">Class ScanSchemaOrchestrator</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.drill.exec.physical.impl.scan.project.ScanSchemaOrchestrator</li> |
| </ul> |
| </li> |
| </ul> |
| <div class="description"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <hr> |
| <br> |
| <pre>public class <span class="typeNameLabel">ScanSchemaOrchestrator</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">Performs projection of a record reader, along with a set of static |
| columns, to produce the final "public" result set (record batch) |
| for the scan operator. Primarily solves the "vector permanence" |
| problem: that the scan operator must present the same set of vectors |
| to downstream operators despite the fact that the scan operator hosts |
| a series of readers, each of which builds its own result set. |
| <p> |
| Provides the option to continue a schema from one batch to the next. |
| This can reduce spurious schema changes in formats, such as JSON, with |
| varying fields. It is not, however, a complete solution as the outcome |
| still depends on the order of file scans and the division of files across |
| readers. |
| <p> |
| Provides the option to infer the schema from the first batch. The "quick path" |
| to obtain the schema will read one batch, then use that schema as the returned |
| schema, returning the full batch in the next call to <tt>next()</tt>. |
| |
| <h4>Publishing the Final Result Set<h4> |
| |
| This class "publishes" a vector container that has the final, projected |
| form of a scan. The projected schema include: |
| <ul> |
| <li>Columns from the reader.</li> |
| <li>Static columns, such as implicit or partition columns.</li> |
| <li>Null columns for items in the select list, but not found in either |
| of the above two categories.</li> |
| </ul> |
| The order of columns is that set by the select list (or, by the reader for |
| a <tt>SELECT *</tt> query. |
| |
| <h4>Schema Handling</h4> |
| |
| The mapping handles a variety of cases: |
| <ul> |
| <li>An early-schema table (one in which we know the schema and |
| the schema remains constant for the whole table.</li> |
| <li>A late schema table (one in which we discover the schema as |
| we read the table, and where the schema can change as the read |
| progresses.)<ul> |
| <li>Late schema table with SELECT * (we want all columns, whatever |
| they happen to be.)</li> |
| <li>Late schema with explicit select list (we want only certain |
| columns when they happen to appear in the input.)</li></ul></li> |
| </ul> |
| |
| <h4>Implementation Overview</h4> |
| |
| Major tasks of this class include: |
| <ul> |
| <li>Project table columns (change position and or name).</li> |
| <li>Insert static and null columns.</li> |
| <li>Schema smoothing. That is, if table A produces columns (a, b), but |
| table B produces only (a), use the type of the first table's b column for the |
| null created for the missing b in table B.</li> |
| <li>Vector persistence: use the same set of vectors across readers as long |
| as the reader schema does not cause a "hard" schema change (change in type, |
| introduction of a new column.</li> |
| <li>Detection of schema changes (change of type, introduction of a new column |
| for a <tt>SELECT *</tt> query, changing the projected schema, and reporting |
| the change downstream.</li> |
| </ul> |
| A projection is needed to: |
| <ul> |
| <li>Reorder table columns</li> |
| <li>Select a subset of table columns</li> |
| <li>Fill in missing select columns</li> |
| <li>Fill in implicit or partition columns</li> |
| </ul> |
| Creates and returns the batch merger that does the projection. |
| |
| <h4>Projection</h4> |
| |
| To visualize this, assume we have numbered table columns, lettered |
| implicit, null or partition columns:<pre><code> |
| [ 1 | 2 | 3 | 4 ] Table columns in table order |
| [ A | B | C ] Static columns |
| </code></pre> |
| Now, we wish to project them into select order. |
| Let's say that the SELECT clause looked like this, with "t" |
| indicating table columns:<pre><code> |
| SELECT t2, t3, C, B, t1, A, t2 ... |
| </code></pre> |
| Then the projection looks like this:<pre><code> |
| [ 2 | 3 | C | B | 1 | A | 2 ] |
| </code></pre> |
| Often, not all table columns are projected. In this case, the |
| result set loader presents the full table schema to the reader, |
| but actually writes only the projected columns. Suppose we |
| have:<pre><code> |
| SELECT t3, C, B, t1,, A ... |
| </code></pre> |
| Then the abbreviated table schema looks like this:<pre><code> |
| [ 1 | 3 ]</code></pre> |
| Note that table columns retain their table ordering. |
| The projection looks like this:<pre><code> |
| [ 2 | C | B | 1 | A ] |
| </code></pre> |
| <p> |
| The projector is created once per schema, then can be reused for any |
| number of batches. |
| <p> |
| Merging is done in one of two ways, depending on the input source: |
| <ul> |
| <li>For the table loader, the merger discards any data in the output, |
| then exchanges the buffers from the input columns to the output, |
| leaving projected columns empty. Note that unprojected columns must |
| be cleared by the caller.</li> |
| <li>For implicit and null columns, the output vector is identical |
| to the input vector.</li></div> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ======== NESTED CLASS SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="nested.class.summary"> |
| <!-- --> |
| </a> |
| <h3>Nested Class Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Nested Class Summary table, listing nested classes, and an explanation"> |
| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.ScanOrchestratorBuilder.html" title="class in org.apache.drill.exec.physical.impl.scan.project">ScanSchemaOrchestrator.ScanOrchestratorBuilder</a></span></code> </td> |
| </tr> |
| <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/project/ScanSchemaOrchestrator.ScanSchemaOptions.html" title="class in org.apache.drill.exec.physical.impl.scan.project">ScanSchemaOrchestrator.ScanSchemaOptions</a></span></code> </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- =========== FIELD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.summary"> |
| <!-- --> |
| </a> |
| <h3>Field Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../../../../org/apache/drill/exec/memory/BufferAllocator.html" title="interface in org.apache.drill.exec.memory">BufferAllocator</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#allocator">allocator</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#batchCount">batchCount</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#DEFAULT_BATCH_BYTE_COUNT">DEFAULT_BATCH_BYTE_COUNT</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#DEFAULT_BATCH_ROW_COUNT">DEFAULT_BATCH_ROW_COUNT</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#MAX_BATCH_BYTE_SIZE">MAX_BATCH_BYTE_SIZE</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#MAX_BATCH_ROW_COUNT">MAX_BATCH_ROW_COUNT</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/MetadataManager.html" title="interface in org.apache.drill.exec.physical.impl.scan.project">MetadataManager</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#metadataManager">metadataManager</a></span></code> |
| <div class="block">Creates the metadata (file and directory) columns, if needed.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#MIN_BATCH_BYTE_SIZE">MIN_BATCH_BYTE_SIZE</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.ScanSchemaOptions.html" title="class in org.apache.drill.exec.physical.impl.scan.project">ScanSchemaOrchestrator.ScanSchemaOptions</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#options">options</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../../../../org/apache/drill/exec/record/VectorContainer.html" title="class in org.apache.drill.exec.record">VectorContainer</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#outputContainer">outputContainer</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#rowCount">rowCount</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanLevelProjection.html" title="class in org.apache.drill.exec.physical.impl.scan.project">ScanLevelProjection</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#scanProj">scanProj</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/SchemaSmoother.html" title="class in org.apache.drill.exec.physical.impl.scan.project">SchemaSmoother</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#schemaSmoother">schemaSmoother</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../../../../org/apache/drill/exec/physical/resultSet/impl/ResultVectorCacheImpl.html" title="class in org.apache.drill.exec.physical.resultSet.impl">ResultVectorCacheImpl</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#vectorCache">vectorCache</a></span></code> |
| <div class="block">Cache used to preserve the same vectors from one output batch to the |
| next to keep the Project operator happy (which depends on exactly the |
| same vectors.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.summary"> |
| <!-- --> |
| </a> |
| <h3>Constructor Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#ScanSchemaOrchestrator-org.apache.drill.exec.memory.BufferAllocator-org.apache.drill.exec.physical.impl.scan.project.ScanSchemaOrchestrator.ScanOrchestratorBuilder-">ScanSchemaOrchestrator</a></span>(<a href="../../../../../../../../org/apache/drill/exec/memory/BufferAllocator.html" title="interface in org.apache.drill.exec.memory">BufferAllocator</a> allocator, |
| <a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.ScanOrchestratorBuilder.html" title="class in org.apache.drill.exec.physical.impl.scan.project">ScanSchemaOrchestrator.ScanOrchestratorBuilder</a> builder)</code> </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.summary"> |
| <!-- --> |
| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#atLimit--">atLimit</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#close--">close</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#closeReader--">closeReader</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#hasSchema--">hasSchema</a></span>()</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#isProjectNone--">isProjectNone</a></span>()</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../../../org/apache/drill/exec/record/VectorContainer.html" title="class in org.apache.drill.exec.record">VectorContainer</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#output--">output</a></span>()</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../../../org/apache/drill/exec/record/metadata/TupleMetadata.html" title="interface in org.apache.drill.exec.record.metadata">TupleMetadata</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#providedSchema--">providedSchema</a></span>()</code> |
| <div class="block">Returns the provided reader schema.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ReaderSchemaOrchestrator.html" title="class in org.apache.drill.exec.physical.impl.scan.project">ReaderSchemaOrchestrator</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#startReader--">startReader</a></span>()</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html#tallyBatch-int-">tallyBatch</a></span>(int rowCount)</code> </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.<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></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.detail"> |
| <!-- --> |
| </a> |
| <h3>Field Detail</h3> |
| <a name="MIN_BATCH_BYTE_SIZE"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>MIN_BATCH_BYTE_SIZE</h4> |
| <pre>public static final int MIN_BATCH_BYTE_SIZE</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../../../constant-values.html#org.apache.drill.exec.physical.impl.scan.project.ScanSchemaOrchestrator.MIN_BATCH_BYTE_SIZE">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="MAX_BATCH_BYTE_SIZE"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>MAX_BATCH_BYTE_SIZE</h4> |
| <pre>public static final int MAX_BATCH_BYTE_SIZE</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../../../constant-values.html#org.apache.drill.exec.physical.impl.scan.project.ScanSchemaOrchestrator.MAX_BATCH_BYTE_SIZE">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="DEFAULT_BATCH_ROW_COUNT"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>DEFAULT_BATCH_ROW_COUNT</h4> |
| <pre>public static final int DEFAULT_BATCH_ROW_COUNT</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../../../constant-values.html#org.apache.drill.exec.physical.impl.scan.project.ScanSchemaOrchestrator.DEFAULT_BATCH_ROW_COUNT">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="DEFAULT_BATCH_BYTE_COUNT"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>DEFAULT_BATCH_BYTE_COUNT</h4> |
| <pre>public static final int DEFAULT_BATCH_BYTE_COUNT</pre> |
| </li> |
| </ul> |
| <a name="MAX_BATCH_ROW_COUNT"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>MAX_BATCH_ROW_COUNT</h4> |
| <pre>public static final int MAX_BATCH_ROW_COUNT</pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../../../constant-values.html#org.apache.drill.exec.physical.impl.scan.project.ScanSchemaOrchestrator.MAX_BATCH_ROW_COUNT">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="allocator"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>allocator</h4> |
| <pre>protected final <a href="../../../../../../../../org/apache/drill/exec/memory/BufferAllocator.html" title="interface in org.apache.drill.exec.memory">BufferAllocator</a> allocator</pre> |
| </li> |
| </ul> |
| <a name="options"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>options</h4> |
| <pre>protected final <a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.ScanSchemaOptions.html" title="class in org.apache.drill.exec.physical.impl.scan.project">ScanSchemaOrchestrator.ScanSchemaOptions</a> options</pre> |
| </li> |
| </ul> |
| <a name="metadataManager"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>metadataManager</h4> |
| <pre>public final <a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/MetadataManager.html" title="interface in org.apache.drill.exec.physical.impl.scan.project">MetadataManager</a> metadataManager</pre> |
| <div class="block">Creates the metadata (file and directory) columns, if needed.</div> |
| </li> |
| </ul> |
| <a name="vectorCache"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>vectorCache</h4> |
| <pre>protected final <a href="../../../../../../../../org/apache/drill/exec/physical/resultSet/impl/ResultVectorCacheImpl.html" title="class in org.apache.drill.exec.physical.resultSet.impl">ResultVectorCacheImpl</a> vectorCache</pre> |
| <div class="block">Cache used to preserve the same vectors from one output batch to the |
| next to keep the Project operator happy (which depends on exactly the |
| same vectors. |
| <p> |
| If the Project operator ever changes so that it depends on looking up |
| vectors rather than vector instances, this cache can be deprecated.</div> |
| </li> |
| </ul> |
| <a name="scanProj"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>scanProj</h4> |
| <pre>protected final <a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanLevelProjection.html" title="class in org.apache.drill.exec.physical.impl.scan.project">ScanLevelProjection</a> scanProj</pre> |
| </li> |
| </ul> |
| <a name="schemaSmoother"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>schemaSmoother</h4> |
| <pre>protected final <a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/SchemaSmoother.html" title="class in org.apache.drill.exec.physical.impl.scan.project">SchemaSmoother</a> schemaSmoother</pre> |
| </li> |
| </ul> |
| <a name="batchCount"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>batchCount</h4> |
| <pre>protected int batchCount</pre> |
| </li> |
| </ul> |
| <a name="rowCount"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>rowCount</h4> |
| <pre>protected long rowCount</pre> |
| </li> |
| </ul> |
| <a name="outputContainer"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>outputContainer</h4> |
| <pre>protected <a href="../../../../../../../../org/apache/drill/exec/record/VectorContainer.html" title="class in org.apache.drill.exec.record">VectorContainer</a> outputContainer</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="ScanSchemaOrchestrator-org.apache.drill.exec.memory.BufferAllocator-org.apache.drill.exec.physical.impl.scan.project.ScanSchemaOrchestrator.ScanOrchestratorBuilder-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>ScanSchemaOrchestrator</h4> |
| <pre>public ScanSchemaOrchestrator(<a href="../../../../../../../../org/apache/drill/exec/memory/BufferAllocator.html" title="interface in org.apache.drill.exec.memory">BufferAllocator</a> allocator, |
| <a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.ScanOrchestratorBuilder.html" title="class in org.apache.drill.exec.physical.impl.scan.project">ScanSchemaOrchestrator.ScanOrchestratorBuilder</a> builder)</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="startReader--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>startReader</h4> |
| <pre>public <a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ReaderSchemaOrchestrator.html" title="class in org.apache.drill.exec.physical.impl.scan.project">ReaderSchemaOrchestrator</a> startReader()</pre> |
| </li> |
| </ul> |
| <a name="isProjectNone--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isProjectNone</h4> |
| <pre>public boolean isProjectNone()</pre> |
| </li> |
| </ul> |
| <a name="hasSchema--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>hasSchema</h4> |
| <pre>public boolean hasSchema()</pre> |
| </li> |
| </ul> |
| <a name="providedSchema--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>providedSchema</h4> |
| <pre>public <a href="../../../../../../../../org/apache/drill/exec/record/metadata/TupleMetadata.html" title="interface in org.apache.drill.exec.record.metadata">TupleMetadata</a> providedSchema()</pre> |
| <div class="block">Returns the provided reader schema.</div> |
| </li> |
| </ul> |
| <a name="output--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>output</h4> |
| <pre>public <a href="../../../../../../../../org/apache/drill/exec/record/VectorContainer.html" title="class in org.apache.drill.exec.record">VectorContainer</a> output()</pre> |
| </li> |
| </ul> |
| <a name="tallyBatch-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>tallyBatch</h4> |
| <pre>public void tallyBatch(int rowCount)</pre> |
| </li> |
| </ul> |
| <a name="atLimit--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>atLimit</h4> |
| <pre>public boolean atLimit()</pre> |
| </li> |
| </ul> |
| <a name="closeReader--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>closeReader</h4> |
| <pre>public void closeReader()</pre> |
| </li> |
| </ul> |
| <a name="close--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>close</h4> |
| <pre>public void close()</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| </div> |
| <!-- ========= END OF CLASS DATA ========= --> |
| <!-- ======= START OF BOTTOM NAVBAR ====== --> |
| <div class="bottomNav"><a name="navbar.bottom"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.bottom" title="Skip navigation links">Skip navigation links</a></div> |
| <a name="navbar.bottom.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../../../../../../../overview-summary.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="class-use/ScanSchemaOrchestrator.html">Use</a></li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../../../../../../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../../../../../../../index-all.html">Index</a></li> |
| <li><a href="../../../../../../../../help-doc.html">Help</a></li> |
| </ul> |
| </div> |
| <div class="subNav"> |
| <ul class="navList"> |
| <li><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanLevelProjection.ScanProjectionType.html" title="enum in org.apache.drill.exec.physical.impl.scan.project"><span class="typeNameLink">Prev Class</span></a></li> |
| <li><a href="../../../../../../../../org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.ScanOrchestratorBuilder.html" title="class in org.apache.drill.exec.physical.impl.scan.project"><span class="typeNameLink">Next Class</span></a></li> |
| </ul> |
| <ul class="navList"> |
| <li><a href="../../../../../../../../index.html?org/apache/drill/exec/physical/impl/scan/project/ScanSchemaOrchestrator.html" target="_top">Frames</a></li> |
| <li><a href="ScanSchemaOrchestrator.html" target="_top">No Frames</a></li> |
| </ul> |
| <ul class="navList" id="allclasses_navbar_bottom"> |
| <li><a href="../../../../../../../../allclasses-noframe.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_bottom"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li><a href="#nested.class.summary">Nested</a> | </li> |
| <li><a href="#field.summary">Field</a> | </li> |
| <li><a href="#constructor.summary">Constr</a> | </li> |
| <li><a href="#method.summary">Method</a></li> |
| </ul> |
| <ul class="subNavList"> |
| <li>Detail: </li> |
| <li><a href="#field.detail">Field</a> | </li> |
| <li><a href="#constructor.detail">Constr</a> | </li> |
| <li><a href="#method.detail">Method</a></li> |
| </ul> |
| </div> |
| <a name="skip.navbar.bottom"> |
| <!-- --> |
| </a></div> |
| <!-- ======== END OF BOTTOM NAVBAR ======= --> |
| <p class="legalCopy"><small>Copyright © 1970 <a href="https://www.apache.org/">The Apache Software Foundation</a>. All rights reserved.</small></p> |
| </body> |
| </html> |
