Re: Issue while calling new PostgreSQL command from a Java Application

You may have to add code to copy inp_str to _copyVacuumStmt(). See how a
character array being copied from other _copy* functions.

On Fri, Jul 4, 2014 at 10:43 AM, Ashoke <s(dot)ashoke(at)gmail(dot)com> wrote:

> Hi,
>
> ------------------------------
>
> I have defined a new command my_command in PostgreSQL. This command takes
> the path of ANALYZE and inside analyze.c, I have a function to do some
> operations if its my_command.This command takes the input arguments:
> table name, column name and an input string.
>
> my_command nation (n_nationkey) 'input string';
>
> When I run this command from command line psql, it works as expected. But
> when I call the same command from a java application, the variable that
> stores the input string is NULL.
>
> I printed the value of the input string in gram.y file where I have
> defined my_command.
> fprintf (stderr, "I am inside gram.y %s\n",n->inp_str); and the input
> string is printed correctly.
>
> But when I print stmt->inp_str in the function standard_ProcessUtility()
> of utility.c for the case T_VacuumStmt, I get the value as NULL. This is
> as far as I could trace back from analyze.c.
>
> I am not sure how executing the same command from an application can make
> a difference.
>
> gram.y content gist:
> ------------------------------
>
> MyStmt:
> my_keyword qualified_name name_list my_inp_str
> {
> VacuumStmt *n = makeNode(VacuumStmt);
> n->options = VACOPT_ANALYZE;
> n->freeze_min_age = -1;
> n->freeze_table_age = -1;
> n->relation = $2;
> n->va_cols = $3;
> n->inp_str = $4;
> fprintf (stderr, "I am inside gram.y %s\n",n->inp_str);
>
> $$ = (Node *)n;
> };
>
> char *inp_str is added to the struct VacuumStmt in parsenodes.h
>
> ---------------------------
>
> Only the newly added char *inp_str(that is different from ANALYZE) value
> is NULL. I was able to retrieve the column name from va_cols.
>
> Any help is appreciated. Thanks!
> --
> Regards,
> Ashoke
>
>
>

--
Best Wishes,
Ashutosh Bapat
EnterpriseDB Corporation
The Postgres Database Company