Обсуждение: Select Query Implementation:Details needed
Dear All,
I am a Mtech Student,IIT Bombay,India.
I am having a database course project where I need to make some modification in postgresql.
currently,my objective is to find how a select query runs in postgresql.I have some knowledge related to parsing after going through some document uploaded
in the developer site.But I would like to know the steps after that.
Can anyone suggest
1.Which file/methods are handing the select query
2.Implementation of select
3.Any relevant document related to the topic
thanks,
Rajdeep
On 10/30/2012 04:07 AM, RAJDEEP SARDAR wrote: > Dear All, > > I am a Mtech Student,IIT Bombay,India. > > I am having a database course project where I need to make some > modification in postgresql. > > currently,my objective is to find how a select query runs in > postgresql.I have some knowledge related to parsing after going through > some document uploaded > > in the developer site.But I would like to know the steps after that. > > Can anyone suggest > > 1.Which file/methods are handing the select query > > 2.Implementation of select > > 3.Any relevant document related to the topic http://www.postgresql.org/developer/backend/ Follow the links. Click on the chart to go to written description. Click on description header to go to relevant code. The READMEs have quite a bit of documentation. > > > thanks, > > Rajdeep > > > -- Adrian Klaver adrian.klaver@gmail.com
Fantastic resource. Thanks for this!
On Tue, Oct 30, 2012 at 3:16 PM, Adrian Klaver <adrian.klaver@gmail.com> wrote:
http://www.postgresql.org/developer/backend/On 10/30/2012 04:07 AM, RAJDEEP SARDAR wrote:Dear All,
I am a Mtech Student,IIT Bombay,India.
I am having a database course project where I need to make some
modification in postgresql.
currently,my objective is to find how a select query runs in
postgresql.I have some knowledge related to parsing after going through
some document uploaded
in the developer site.But I would like to know the steps after that.
Can anyone suggest
1.Which file/methods are handing the select query
2.Implementation of select
3.Any relevant document related to the topic
Follow the links. Click on the chart to go to written description. Click on description header to go to relevant code. The READMEs have quite a bit of documentation.
thanks,
Rajdeep
--
Adrian Klaver
adrian.klaver@gmail.com
--
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Dear All,
I am having a database course project where I need to make some modification in postgresql.
For this I need to modify a select query and add some condition to it.
I need to find out the formclause and whereclause of the select query after it is parsed.To do that,I have found a structure ListCell,which contains a void * ptr_val.It seems that probably this ptr_val is holding some structure within which the strings are stored.But I am not being able to access that as I dont know what kind of structure is pointed by ptr_val.
I am trying to modify analyze.c ,method:transformSelectStmt(ParseState *pstate, SelectStmt *stmt)
Can anyone share any idea how to access the formclause and whereclause of the select statement after the query being parsed?
I need to find out the formclause and whereclause of the select query after it is parsed.To do that,I have found a structure ListCell,which contains a void * ptr_val.It seems that probably this ptr_val is holding some structure within which the strings are stored.But I am not being able to access that as I dont know what kind of structure is pointed by ptr_val.
I am trying to modify analyze.c ,method:transformSelectStmt(ParseState *pstate, SelectStmt *stmt)
Can anyone share any idea how to access the formclause and whereclause of the select statement after the query being parsed?
thanks,
Rajdeep