| From: | "Stefan Wagner" <s_wagner1(at)gmx(dot)net> |
|---|---|
| To: | pgsql-general(at)postgresql(dot)org |
| Subject: | Adding a new Clause in the Source Code |
| Date: | 2017-08-14 08:14:02 |
| Message-ID: | trinity-02ce95bc-96b4-4623-9d17-c9011e399bf4-1502698442962@3c-app-gmx-bs28 |
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| Lists: | pgsql-general |
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<div>Recently I started to take a look at Postgresql on the Source Level. I wanted to extend the Parser by a simple Clause which isn't as easy as I expected.<br/>
Hence I'm here asking for help. This might seem trivial for a Person which is able to answer this Question but please take a moment of your time and help a<br/>
fellow coder out. </div>
<div> </div>
<div>My Objective is to add a new Clause after the WHERE Clause in a SELECT Statement which modifys the order of my result. I allready invested some time to get familar<br/>
with the Bison part in source\src\backend\parser so adding new Keywords seems possible. The question now is in which Files do I need to add what to make it work.<br/>
Yes this question seems a bit broad but Information I found was confusing or outdated.</div>
<div> </div>
<div>I would really appreciate if someone could hack me a quick example of a new clause lets call it ADDITIONAL with Keywords HIGH, LOW to order columns. I just want the construct. What<br/>
the Keywords accomplish and the Algorithm is something I'm gonna try to figure out on my own. I just need to know in which File and which Line I need to enter my Code.</div>
<div> </div>
<div>I appreciate any help I can get and if needed I'll add some additional Information.</div>
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