[HACKERS] Debugging methods

Hello,

I am a beginner to Postgres and I am going through code. I would like
to know the debugging methods used in development.

Some of my requirements are; for a given query, how parse structures
are created in pg_parse_query, how they are analyzed and rewritten in
pg_analyze_and_rewrite and how the final plan is created in
pg_plan_queries. I will go through code but I would like to know any
debugging methods available to understand what happens for a given
query.

I have searched in the net and I am unable to find them. Sorry if it
is available somewhere and I am asking again.

Thanks,
Srinivas

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