Обсуждение: Parsing output of EXPLAIN command in PostgreSQL
I'm developing an application that requires parsing of execution plans (those produced as output by issuing an EXPLAIN [query] command). Are you aware of any Java library that I could use for this purpose? I found https://github.com/depesz/Pg--Explain but it is built in Perl. Also another option I am considering is to use EXPLAIN [query] FORMAT XML which is available in PostgreSQL 9.1. However,in that case it would better to have the XML Schema of the generated plans available. Is there any other solution I am not aware of? Thank you
On 2011-11-10 17:23, Αναστάσιος Αρβανίτης wrote: > Also another option I am considering is to use EXPLAIN [query] FORMAT XML which is available in PostgreSQL 9.1. However,in that case it > would better to have the XML Schema of the generated plans available. > > Is there any other solution I am not aware of? Hi, I recommend using the XML, JSON or YAML version of the plan, whichever is easiest in your programming language to parse. I do not think anyone has written a formal schema yet for the XML but it still should be much easier to parse than rolling your own parser for the human readable format. But if you insist on parsing the human readable format, e.g. to support versions before 9.1, I recommend that you take a look at http://explain.depesz.com/ which supports parsing text plans in addition to XML and JSON. The site is open source and written in Perl. The source code can be found at: https://github.com/depesz/Pg--Explain Best regards, Andreas -- Andreas Karlsson
On 2011-11-10 23:42, Andreas Karlsson wrote: > Hi, > > I recommend using the XML, JSON or YAML version of the plan, whichever > is easiest in your programming language to parse. I do not think anyone > has written a formal schema yet for the XML but it still should be much > easier to parse than rolling your own parser for the human readable format. > > But if you insist on parsing the human readable format, e.g. to support > versions before 9.1, I recommend that you take a look at > http://explain.depesz.com/ which supports parsing text plans in addition > to XML and JSON. The site is open source and written in Perl. > > The source code can be found at: > > https://github.com/depesz/Pg--Explain Sorry, I did not see the other thread about the same thing. Let's keep all discussion there. -- Andreas Karlsson