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Histogram generation on multiple dimensions
专利权人:
Teradata US, Inc.
发明人:
Gibas Michael A.,To Hien T.
申请号:
US201414588109
公开号:
US9678999(B1)
申请日:
2014.12.31
申请国别(地区):
美国
年份:
2017
代理人:
Campbell, Jr. Randy L.
摘要:
Based on a request, a processor may identify a multi-dimensional dataset stored in the at least one of a plurality of data tables and identify each dimension of the multi-dimensional dataset. For each respective identified dimension, the processor may sort the identified dataset on values of the respective identified dimension, partition the sorted dataset into a predetermined number of intervals associated with the respective identified dimension, determine a number of rows for each interval and select a lower boundary value and an upper boundary value for each interval. The upper boundary value may be the highest value in each interval. The lower boundary value for an interval having lowest sorted values may be the lowest value in the interval or the upper boundary value of an interval having immediately preceding partitioned values. The processor may further store the boundary values and rows for each interval of each identified dimension as the histogram. A method and computer-readable medium are also dis
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