Fennel: LcsRowScanExecStreamParams Struct Reference (original) (raw)
Parameters specific to the row scan execution stream, including the type of scan (full table scan versus specific rid reads) and whether residual filtering should be performed. More...
#include <[LcsRowScanExecStream.h](LcsRowScanExecStream%5F8h-source.html)>
Inheritance diagram for LcsRowScanExecStreamParams:
| Public Attributes | |
|---|---|
| bool | isFullScan |
| If true, this scan performs a full table scan. | |
| bool | hasExtraFilter |
| If true, this ExecStream contains extra residual filters that should be applied during the scan. | |
| TupleProjection | residualFilterCols |
| contains an array of column id corresponding to each filter column | |
| TableSamplingMode | samplingMode |
| The configured sampling mode for this row scan: off, Bernoulli or system. | |
| float | samplingRate |
| Percentage of rows to return as a sample. | |
| bool | samplingIsRepeatable |
| Flag indicating whether sample results should be repeatable (assuming no changes to the structure or contents of the table. | |
| int32_t | samplingRepeatableSeed |
| Seed value for random number generators to be used for repeatable sampling. | |
| int32_t | samplingClumps |
| Number of sample clumps to produce during system-mode sampling. | |
| int64_t | samplingRowCount |
| Number of rows in the table, to support system-mode sampling. | |
| LcsClusterScanDefList | lcsClusterScanDefs |
| Ordered list of cluster scans. | |
| TupleProjection | outputProj |
| projection from scan | |
| Static Public Attributes | |
| static int32_t | defaultSystemSamplingClumps |
Detailed Description
Parameters specific to the row scan execution stream, including the type of scan (full table scan versus specific rid reads) and whether residual filtering should be performed.
Definition at line 41 of file LcsRowScanExecStream.h.
Member Data Documentation
If true, this scan performs a full table scan.
In that case, the first input into the stream will be those rids that are to be excluded from the scan. Otherwise, if this is false, the first input to the stream contains the list of rids that the stream should read.
Definition at line 52 of file LcsRowScanExecStream.h.
Referenced by LcsRowScanExecStream::prepare(), LcsMultiClusterAppendTest::scanCols(), LcsRowScanExecStreamTest::testFilterCols(), LcsRowScanExecStreamTest::testSampleScanCols(), LcsRowScanExecStreamTest::testScanCols(), LcsClusterAppendExecStreamTest::testScanMultiCol(), LcsClusterAppendExecStreamTest::testScanSingleCol(), LcsClusterReplaceExecStreamTest::verifyCluster(), and ExecStreamSubFactory_lu::visit().
If true, this ExecStream contains extra residual filters that should be applied during the scan.
If n columns contain filters, then those filters are contained in input streams 1 through n, where each stream contains only those filters specific to each column.
Definition at line 60 of file LcsRowScanExecStream.h.
Referenced by LcsRowScanExecStream::prepare(), LcsMultiClusterAppendTest::scanCols(), LcsRowScanExecStreamTest::testFilterCols(), LcsRowScanExecStreamTest::testSampleScanCols(), LcsRowScanExecStreamTest::testScanCols(), LcsClusterAppendExecStreamTest::testScanMultiCol(), LcsClusterAppendExecStreamTest::testScanSingleCol(), LcsClusterReplaceExecStreamTest::verifyCluster(), and ExecStreamSubFactory_lu::visit().
Ordered list of cluster scans.
Definition at line 57 of file LcsRowScanBaseExecStream.h.
Referenced by LbmSearchTest::initClusterScanDef(), LbmLoadBitmapTest::initClusterScanDef(), LcsRowScanBaseExecStream::prepare(), LbmGeneratorExecStream::prepare(), LcsRowScanExecStream::prepareResidualFilters(), ExecStreamSubFactory_lu::readClusterScan(), LcsMultiClusterAppendTest::scanCols(), LcsRowScanExecStreamTest::testFilterCols(), LcsRowScanExecStreamTest::testSampleScanCols(), LcsRowScanExecStreamTest::testScanCols(), LcsClusterAppendExecStreamTest::testScanMultiCol(), LcsClusterAppendExecStreamTest::testScanSingleCol(), and LcsClusterReplaceExecStreamTest::verifyCluster().
projection from scan
Definition at line 62 of file LcsRowScanBaseExecStream.h.
Referenced by LcsRowScanExecStream::buildOutputProj(), LcsRowScanBaseExecStream::buildOutputProj(), LbmSearchTest::loadTableAndIndex(), LcsRowScanExecStream::prepare(), LcsRowScanBaseExecStream::prepare(), LcsRowScanExecStream::prepareResidualFilters(), LcsMultiClusterAppendTest::scanCols(), LcsRowScanExecStreamTest::testFilterCols(), LbmLoadBitmapTest::testLoad(), LcsRowScanExecStreamTest::testSampleScanCols(), LcsRowScanExecStreamTest::testScanCols(), LcsClusterAppendExecStreamTest::testScanMultiCol(), LcsClusterAppendExecStreamTest::testScanSingleCol(), LcsClusterReplaceExecStreamTest::verifyCluster(), and ExecStreamSubFactory_lu::visit().
The documentation for this struct was generated from the following files:
- /home/pub/open/dev/fennel/lucidera/colstore/LcsRowScanExecStream.h
- /home/pub/open/dev/fennel/lucidera/colstore/LcsRowScanExecStream.cpp
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