On Tue, Jan 12, 2010 at 10:22 AM, zhangzhenggui <zhangzheng...@126.com>wrote:
> Dear friend, > When I execute a SQL with C/C++ API, I want to know which table is > operated by this SQL. Is there any way to do this except parse the SQL? > > Every approach is not perfect, here is another one. add EXPLAIN to the query you examine, iterate through the results while collecting p2 field where opcode field is "OpenRead" or "OpenWrite" (you have to iterate since you can not use Explain prefixed query as a subquery). Concatenate the values as a comma-separated string like "3, 4, 7". These are the root pages of the tables used. After that use query SELECT tbl_name FROM sqlite_master WHERE type="table" and rootpage in (%s) (replace %s with your comma-seprated list). Now you have the list of tables used as a query result. I have not high level of certainty this will always work as expected, but compare this with other "undocumented", "subject to change" variants and choose the best ) Max _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
