Re: [HACKERS] Meaning of keyword category list in src/backend/parser/gram.y

2013-05-06 Thread soroosh sardari 
Dear Amit

yes, my new constrains must not be name of variable.
I moved new keyword to reserved keyword.
Problem solved :D

Regards
Soroosh




On Mon, May 6, 2013 at 10:17 AM, Amit Kapila amit.kap...@huawei.com wrote:

 On Sunday, May 05, 2013 1:03 PM soroosh sardari wrote:
  Hi
  I'm trying to add a new constraint to column constraint.
  I add a new keyword ro kwlist.h and gram.y, and also edit
 ColConstraintElem.
  The problem is i don't know what is Keyword category lists at the end
 of
 gram.y.

 Keyword category lists are to distinguish different type of keywords.
 For example, if you add keyword in reserved_keyword, then you cannot use
 that as variable in SQL where as if you put in unreserved_keyword, then you
 can use it.


  when I added the new keyword in unreserved_keyword, shift/reduce and
 reduce/reduce conflicts appear in bison outputs.
  any idea about this problem and meaning of  Keyword category lists is
 appreciated.

 This means the grammar syntax you have defined for ColConstraintElem
 conflicts with some already existing definition. shift/reduce conflicts can
 occur due to your changes in  ColConstraintElem definition. I suggest first
 you can try with minimal/dummy changes in ColConstraintElem and once it
 passes then you can try with your actual changes to see what part of
 changes
 cause conflicts.

 With Regards,
 Amit Kapila.



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[HACKERS] Meaning of keyword category list in src/backend/parser/gram.y

2013-05-05 Thread soroosh sardari 
Hi

I'm trying to add a new constraint to column constraint.
I add a new keyword ro kwlist.h and gram.y, and also edit ColConstraintElem.

The problem is i don't know what is Keyword category lists at the end of
gram.y.
when I added the new keyword in unreserved_keyword, shift/reduce and
reduce/reduce conflicts appear in bison outputs.

any idea about this problem and meaning of  Keyword category lists is
appreciated.

Cheers
Soroosh

Re: [HACKERS] Meaning of keyword category list in src/backend/parser/gram.y

2013-05-05 Thread Amit Kapila 
On Sunday, May 05, 2013 1:03 PM soroosh sardari wrote:
 Hi
 I'm trying to add a new constraint to column constraint.
 I add a new keyword ro kwlist.h and gram.y, and also edit
ColConstraintElem.
 The problem is i don't know what is Keyword category lists at the end of
gram.y.

Keyword category lists are to distinguish different type of keywords. 
For example, if you add keyword in reserved_keyword, then you cannot use
that as variable in SQL where as if you put in unreserved_keyword, then you
can use it.


 when I added the new keyword in unreserved_keyword, shift/reduce and
reduce/reduce conflicts appear in bison outputs.
 any idea about this problem and meaning of  Keyword category lists is
appreciated.

This means the grammar syntax you have defined for ColConstraintElem
conflicts with some already existing definition. shift/reduce conflicts can
occur due to your changes in  ColConstraintElem definition. I suggest first
you can try with minimal/dummy changes in ColConstraintElem and once it
passes then you can try with your actual changes to see what part of changes
cause conflicts.

With Regards,
Amit Kapila.



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