> 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!
