Introduction to Hacking PostgreSQL
Introduction to Hacking PostgreSQL
Neil Conway, Gavin Sherry
neilc@, swm@.au
Introduction to Hacking PostgreSQL ? p. 1
Outline
1. Development environment 2. Architecture of PostgreSQL 3. Backend conventions and infrastructure 4. How to submit a patch 5. Example patch: adding WHEN qualification to triggers
Introduction to Hacking PostgreSQL ? p. 2
Part 1: Development Environment
Most of the Postgres developers use Unix; you probably should too You'll need to know C
Fortunately, C is easy Unix systems programming knowledge is helpful, depending on what you want to work on Learning to understand how a complex system functions is a skill in itself ("code reading")
Introduction to Hacking PostgreSQL ? p. 3
Development Tools
Basics: $CC, Bison, Flex, CVS, autotools, gdb Configure flags: enable-depend, enable-debug, enable-cassert Consider CFLAGS=-O0 for easier debugging, but this suppresses some classes of warnings
tags or cscope are essential "What is the definition of this function/type?" "What are all the call-sites of this function?" src/tools/make_[ce]tags
ccache and distcc are useful, especially on slower machines valgrind can be useful for debugging memory errors
Introduction to Hacking PostgreSQL ? p. 4
Text Editor
If you're not using a good programmer's text editor, start Teach your editor to obey the Postgres coding conventions:
Hard tabs, with a tab width of 4 spaces Similar to Allman/BSD style; just copy the surrounding code Using the Postgres coding conventions makes it more likely that your patch will be promptly reviewed and applied
Introduction to Hacking PostgreSQL ? p. 5
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