Class MergeSortInfo
- All Implemented Interfaces:
SortInfo
- See Also:
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Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptiongetAllSortInfo
(Properties prop) Return all information gathered about the sort.
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Field Details
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stat_sortType
Performance counters ... -
stat_numRowsInput
private int stat_numRowsInput -
stat_numRowsOutput
private int stat_numRowsOutput -
stat_numMergeRuns
private int stat_numMergeRuns -
stat_mergeRunsSize
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Constructor Details
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MergeSortInfo
MergeSortInfo(MergeInserter sort)
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Method Details
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getAllSortInfo
Return all information gathered about the sort.This routine returns a list of properties which contains all information gathered about the sort. If a Property is passed in, then that property list is appended to, otherwise a new property object is created and returned.
Not all sorts may support all properties, if the property is not supported then it will not be returned. The following is a list of properties that may be returned: sortType - type of the sort being performed: internal external numRowsInput - the number of rows input to the sort. This number includes duplicates. numRowsOutput - the number of rows to be output by the sort. This number may be different from numRowsInput since duplicates may not be output. numMergeRuns - the number of merge runs for the sort. Applicable to external sorts only. Note: when a SortController is closed, numMergeRuns may increase by 1, to reflect the additional merge run that may be created for any data still in the sort buffer. mergeRunsSize - the size (number of rows) of each merge run for the sort. Applicable to external sorts only. e.g. [3,3,2] indicates 3 merge runs, where the first two runs have 3 rows each, and the last run has 2 rows. Note: when a SortController is closed, this vector may get an additional element, to reflect the additional merge run that may be created for any data still in the sort buffer. NOTE - this list will be expanded as more information about the sort is gathered and returned.
- Specified by:
getAllSortInfo
in interfaceSortInfo
- Parameters:
prop
- Property list to fill in.- Throws:
StandardException
- Standard exception policy.
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