Bugs item #2994521, was opened at 2010-04-30 05:01 Message generated for change (Comment added) made by stmane You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=482468&aid=2994521&group_id=56967
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Core Group: MonetDB5 CVS Head Status: Open Resolution: None Priority: 5 Private: No Submitted By: zeuner (zeuner) >Assigned to: Stefan Manegold (stmane) Summary: mat.slice unable to cope with only empty BAT arguments Initial Comment: When executing the attached SQL code, the last query gets compiled to a MAL sequence containing a line like "_13 := mat.slice(0:wrd,0:wrd,_45,_46);", where _45 and _46 are both empty. This causes mat.slice to throw a RUNTIME_OBJECT_MISSING exception in line 292 of src/modules/mal/mat.mx, because i1 is not initialized to a valid value, and doesn't get set if the argument BATs are all empty. A fix is attached, which will initialize i1 to 3, which leads to correct results when the argument BATs are empty, and gets reset if there are non-empty BAT arguments. A more efficient fix would avoid the second loop by initializing i1 to p->argc, but this would require to give up the i1 < i2 assertion in line 276, or at least replacing it by i1 != i2. The maintainers should probably decide if the assertion is still important. ---------------------------------------------------------------------- >Comment By: Stefan Manegold (stmane) Date: 2010-04-30 11:13 Message: Thanks for reporting! I'll take care of it. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=482468&aid=2994521&group_id=56967 ------------------------------------------------------------------------------ _______________________________________________ Monetdb-bugs mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/monetdb-bugs
