Dear Tom, BTW, my current implementation is on PG 9.5...
Thanks, Jia Yu ------------------------------------ Jia Yu, Ph.D. Student Computer Science Arizona State University <http://www.asu.edu/> Reach me via Jia Yu's Homepage <http://www.public.asu.edu/~jiayu2/> | GitHub Repositories <https://github.com/jiayuasu> On Mon, Jan 23, 2017 at 5:12 PM, Jia Yu <jiayu198...@gmail.com> wrote: > Dear Tom, > > Thanks for your reply! > > Actually, I already compiled the source code with "-O0" and then got those > backtraces. > > The hippobuild function just starts building an index access method and it > will call hippobuildcallback to iterate each parent table tuple in its > function body. > > What makes me fell very confused is that the same code works when I call > "make check" to run regression test (testing my index) but fails at running > normal PG server. > > Here are the lines before and after the problematic line hippo.c 154. It > is the first line of this function and did nothing. > > On the other hand, I will try to adjust my code to fit in PG 9.6 as you > suggested. > > -------------------------------------- > static void hippobuildcallback() > { > ..... > ..... > ..... > *Line 148* } > *Line 149* /* > *Line 150* *This function initializes the entire Hippo. It will call > buildcallback many times. > *Line 151* */ > *Line 152* Datum > *Line 153* hippobuild(PG_FUNCTION_ARGS) > *Line 154* { > *Line 155* /* > * This is some routine declarations for variables > */ > Relation heap = (Relation) PG_GETARG_POINTER(0); > Relation index = (Relation) PG_GETARG_POINTER(1); > IndexInfo *indexInfo = (IndexInfo *) PG_GETARG_POINTER(2); > IndexBuildResult *result; > double reltuples; > HippoBuildState buildstate; > Buffer buffer; > ...... > -------------------------------------- > > Any hints for this will be greatly appreciated! > > > Thank you very much! > > Jia Yu > > On Mon, Jan 23, 2017 at 2:00 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > >> Jia Yu <jiayu198...@gmail.com> writes: >> > However, these methods don't work in the normal PG server. It gave me >> > "segmentation fault" >> > ... >> > Here is my backtrace. It looks like I cannot access fcinfo. Can you >> help me >> > about this? Or just some hints? I have been struggling with this problem >> > for weeks. >> >> What's the problematic line (hippo.c:154) doing? What's before >> that in the hippobuild function? >> >> I wouldn't put much stock in the "Cannot access memory" message ... that >> just means gdb is confused, which it frequently is. But possibly >> building with -O0 would make it less confused. >> >> BTW, I gather from the reference to OidFunctionCall3Coll that you're >> using PG 9.5 or older. It'd be a good idea to switch to 9.6, which has >> noticeably cleaner indexam APIs that allow some compiler error checking >> on those calls. >> >> regards, tom lane >> > >
