[HACKERS] how to determine clause for new keyword, how to add new clause in gram.y

Please tell me, if want to add 'selectivity' keyword, which clause will it categorize ? Can you please tell me in detail, how should i modify gram.y, as I am new to parser writing ? and use it thereafter. Thank you. -- Pankaj A. Bagul

[HACKERS] Fwd: How parser works and to add keyword to keywords.h

Hello, Can anyone tell about how parser works and if we want to add a new keyword to the keywords.h, and how to use that keyword ? How the all process works ? -- Pankaj B.