Hello, > On 03/12/2014 09:36 AM, Ashoke wrote: > > Hi, > > > > I am working on adding a functionality to PostgreSQL. I need to parse > > the XML format query plan (produced by PostgreSQL v9.3) and save it in > > a simple data structure (say C structure). I was wondering if ... > The only XML parsing we have is where Postgres is built with libxml, > in which case we use its parser. But query plan XML is delivered to a > client (or a log file, which means more or less the same thing > here).
As a HACKERS' matter, explain output can be obtained from ExplainPrintPlan() in any format in backend. I don't know if it is the case though. > If you want to parse it then it should be parsed in the client > - that's why we provide it. Inside postgres I don't see a point in > parsing the XML rather than handling the query plan directly. > > The worst possible option would be to make a hand-cut XML parser, > either in the client or the server - XML parsing has all sorts of > wrinkles that can bite you badly. I agree with it. If XML input is not essential, JSON format would be parsed more easily than xml. 9.3 already intrinsically has a JSON parser infrastructure available for the purpose. regards, -- Kyotaro Horiguchi NTT Open Source Software Center -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers