US 12,393,399 B2
Controlling storage accesses for merge operations
Bruce C. Giamei, Lagrangeville, NY (US); Martin Recktenwald, Schoenaich (DE); Donald W. Schmidt, Stone Ridge, NY (US); Timothy Slegel, Staatsburg, NY (US); Aditya N. Puranik, Pune (IN); Mark S. Farrell, Pleasant Valley, NY (US); Christian Jacobi, West Park, NY (US); Jonathan D. Bradbury, Poughkeepsie, NY (US); and Christian Zoellin, Austin, TX (US)
Assigned to INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)
Filed by INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)
Filed on Nov. 6, 2018, as Appl. No. 16/181,785.
Prior Publication US 2020/0142669 A1, May 7, 2020
Int. Cl. G06F 7/00 (2006.01); G06F 7/16 (2006.01); G06F 16/215 (2019.01)
CPC G06F 7/16 (2013.01) [G06F 16/215 (2019.01)] 25 Claims
OG exemplary drawing
 
1. A computer program product for facilitating processing within a computing environment, the computer program product comprising:
at least one computer readable storage medium readable by at least one processor and storing instructions for performing a method comprising:
merging, by one or more processors, a plurality of records of a plurality of input lists, wherein the merging includes:
determining that an input list of the plurality of input lists has become empty;
obtaining a control to be checked based on the input list becoming empty, the control being an input to the merging and being set prior to the merging and not updated during the merging, the control including:
one indicator having one or more bits, the one indicator of the control being assigned to a selected input list of the plurality of input lists to control processing based on the selected input list becoming empty during the merging; and
another indicator, separate from the one indicator and having one or more other bits, the another indicator of the control being assigned to remaining input lists of the plurality of input lists, the remaining input lists excluding the selected input list, and the another indicator of the control to control processing based on a remaining input list of the remaining input lists becoming empty during the merging;
determining that the input list that has become empty is the selected input list of the plurality of input lists;
checking, based on determining that the selected input list has become empty, the one indicator of the control specifically assigned to the selected input list to determine how to proceed based on the selected input list becoming empty during the merging; and
performing processing, based on the one indicator of the control that is set prior to merging and not updated during the merging, wherein the one indicator of the control is set to one value indicates that the merging is to continue based on the selected input list becoming empty.