[HACKERS] Postgres SQL Parser

[Uma Krishnan]

Hello I'm trying to implement a new SortMerge algorithm, and see how it 
compares with the current algorithm. In doing so, rather than using select, I'd 
like to introduce a new verb so that Select is not modified. 
   
  I looked at the source code, but could find the place where Postgres SQL 
grammer is defined. 
   
  Please help.
   
  Thanks