How to make a map in pg kernel?
Hi, I’m writing some kernel codes in pg15, and now I need to make a map struct, I know c-lang doesn’t support this, so does pg support an internal struct? Hopefully your replies.
Re: ./configure doesn't make effect?
Sorry, I make a mistake, I should make install. That’s my fault > 2023年9月5日 20:08，Jeremy Garniaux 写道： > > Hi, > > The command you described: > > Le 05/09/2023 à 13:41, jacktby jacktby a écrit : >> rm -rf /data > has for effect to remove the /data directory and all its content. See: > https://explainshell.com/explain?cmd=rm+-rf+%2Fdata > > It explains why you don't get the /data content. > > Jeremy > > Jeremy Garniaux > https://mapper.fr <https://mapper.fr/>
./configure doesn't make effect?
I use “rm -rf /data”, the ‘/data’ is the prefix when I execute ./configure command firstly, but after I ‘rm’ it, and use the command again, I can’t get the /data content. Why?
Failed to parse new syntax
/*
* similarity_search_expr is used for our multi-mode
* similarity_search, and we just use this for multi
* cols search.
*/
similarity_search_expr:
sub_search_expr '<' AexprConst {
$$ = (Node *) makeSimpleA_Expr(AEXPR_OP, "<", $1, $3, @2);
}
;
sub_search_expr:
'[' col_tuple_expr '~' AexprConst ']' {
$$ = (Node *) makeSimpleA_Expr(AEXPR_OP, "~", $2, $4, @3);
}
;
col_tuple_expr:
columnref { $$ = $1;}
| '(' col_list_expr ')' { $$ = $2;}
;
col_list_expr:
columnref {
ResTarget* target = makeNode(ResTarget);
target->name = NULL;
target->indirection = NIL;
target->val = (Node *) $1;
target->location = @1;
$$ = list_make1(target);
}
| col_list_expr ',' columnref { $$ = lappend($1,$3);}
;
This is my new grammer.
But I get below:
postgres=# select * from t2 where [a ~ 1] < 0;
ERROR: syntax error at or near "~"
LINE 1: select * from t2 where [a ~ 1] < 0;
It’s strange that it can’t parse ‘~’, I add it in the parser.
How does pg parse 'select '(1,2)''
I’m trying to add new grammar for my application. So I’m do research on gram.y.
I think it will make the '(1,2)' as " '(' a_expr ')' "; but I can’t find out
something like
" a_expr ',' a_expr “, can you give me the details?
How to build a new grammer for pg?
Hi, I’m trying to develop a new grammar for pg, can you give me a code example to reference?
Re: could not find shared library for Python
ok, I'm sorry for that
Re: could not find shared library for Python
jacktbyjack...@gmail.com Replied Message From Adrian Klaver Date 10/17/2022 22:54 To jacktby , pgsql-general@lists.postgresql.org Subject Re: could not find shared library for Python On 10/17/22 07:07, jacktby wrote: I use CentOS7 and upgrade python2.7 to python3.7, but it gives me anHow did you upgrade from Python 2.7 to 3.7?If you run python at the command line do you get the Python 3.7 interpreter? error "could not find shared library for Python",I use the newest code from github repo, how should I do? jacktby jack...@gmail.com -- Adrian Klaveradrian.kla...@aklaver.com
could not find shared library for Python
I use CentOS7 and upgrade python2.7 to python3.7, but it gives me an error "could not find shared library for Python",I use the newest code from github repo, how should I do? jacktbyjack...@gmail.com
Zheap Tech Problem
What's Zheap tech? Can you give me some details or stuff to study? and which version will be realized in ? jacktbyjack...@gmail.com
Please explain what's c99 brain dead?
can you give me a link to study it?
what is brain-dead about C99 inline functions?
C99's brain-dead
[image: 1664711612742.png] can you explain this please?
