sqlite virtual table

I have implemented definitions of all sqlite virtual table apis (vtBextIndex,vtColumn,....) and its working perfectly for single table .I want to support read queries with multiple tables(ex : select t1.col1,t2.col2 from t1,t2) as well but I am not getting information about list of tables in the read queries . I tried to find out definition of sqlite3_vtab_cursor for the same but didn't able to find table-name .