On Thu, Jan 10, 2019 at 11:41:51PM -0800, Donald Dong wrote: > > > On Jan 10, 2019, at 8:01 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > > > > ... estimate_rel_size() in plancat.c is where to look to find out > > about the planner's default estimates when it's lacking hard data. > > Thank you! Now I see how the planner uses the rows to estimate the cost and > generates the best_plan. > > To me, tracing the function calls is not a simple task. I'm using cscope, and > I > use printf when I'm not entirely sure. I was considering to use gbd, but I'm > having issues referencing the source code in gdb. > > I'm very interested to learn how the professionals explore the codebase!
Uh, the developer FAQ has some info on this: https://wiki.postgresql.org/wiki/Developer_FAQ -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + As you are, so once was I. As I am, so you will be. + + Ancient Roman grave inscription +