Patent ID: 9501534
Filing Date: 2016-11-22
CPC Classification: G06F

Claim Text:
1. A computer implemented method for determining an extremum value of an attribute of a first data table, wherein the first data table includes at least a set of data blocks, the method comprising: generating a multidimensional data structure for representing the set of data blocks; assigning, by a computer, to each data block of the set of data blocks a plurality of attribute value information indicative of a range of a plurality of values of an attribute in the data block, wherein assigning results in an extremum set of a plurality of indicative maximum values of the attribute and a plurality of indicative minimum values of the attribute; determining a reference value as an infimum or a supremum of the extremum set based on each extremum in the extremum set; in case the extremum is a minimum, selecting a subset of the set of data blocks, wherein each data block within the subset has a respective minimum value of the attribute that is smaller than the reference value; in case the extremum is a maximum, selecting a subset of the set of data blocks, wherein each data block within the subset has a respective maximum value of the attribute that is higher than the reference value; receiving a second data table; joining the selected subset of data blocks with the received second data table; sorting the joined subset of data blocks; and processing at least a part of the joined subset of data blocks for identifying an extremum value.