On 02/08/12 12:45, Damian Steer wrote:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On 02/08/12 11:27, Cong Wang wrote:
Hi Andy,
I am trying to extend some code of sparql to sql in SDB..
Can you give some points where they are in SDB source code ?
Try
src/com/hp/hpl/jena/sdb/compiler/SDBCompile.java
That kicks everything off, and sets the basic features of the databases.
After that maybe QueryCompilerMain.java and TransformSDB.java? The
basic idea is to taking an input Op -- the query in SPARQL algebra
form -- and run through it replacing it with OpSQLs which contain a
representation of the equivalent SQL (SqlNode) where possible.
Damian
What aspect of the SPARQL->SQL conversion are you looking at? There is
quite a tight binding to the SPARQL execution in ARQ as well.
Andy
