[antlr-interest] [newbie:] Unablanced tree resulting from SQL-parser
framiboe
framiboe at yahoo.de
Mon Sep 20 01:55:00 PDT 2004
Hi all,
it's my first contact to antlr and I managed "MS SQL Select
Statement"-grammar by Tomasz Jastrzebski to produce Java-Code. It
works, partly. It runs without exception and tokenizes a complex SQL-
statement into its atoms. That's good. But the resulting tree is a
totally unbalanced tree, because every node was put "right" under its
parent. I've expected to receive a logical tree, something like
"select" -> column-list -> columns
v
"from" -> table-list
v
"where"
and so on. I hope, that was understandable?! What I receive now, is
more a linked list of tokens instead of a tree.
Question:
- Does that depend on the grammar definition?
- Do I have any possibilities to influence the tree building process?
- Did I understand the whole antlr-thing wrong?
Thanks and regards,
frank
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