AKA_DERBY wrote:
Hello,
We are currently working on extracting the SQL Parser code from Apache Derby
Source Code. Can you please tell us in what form the parse tree is stored?
Where are the entry and exit points (file names) to the parser logic with
respect to the rest of the database.
Thanks in advance,
AKA
Hi AKA,
The Derby parser, sqlgrammar.jj, is written in javacc, which is then
generated into Java classes. For an example of how to run the Derby
parser standalone to just turn out an Abstract Syntax Tree, see
https://issues.apache.org/jira/browse/DERBY-3946 . Derby's parser
creates an AST composed of nodes from the
org.apache.derby.impl.sql.compile package. The best documentation on the
AST is the javadoc for that package. If you need to look deeper under
the hood, I recommend moving this discussion to the derby developer list.
Hope this helps,
-Rick
