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/*-------------------------------------------------------------------------
*
* droplang
*
* Portions Copyright (c) 1996-2015, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/bin/scripts/droplang.c
*
*-------------------------------------------------------------------------
*/
#include "postgres_fe.h"
#include "common.h"
#include "print.h"
#define atooid(x) ((Oid) strtoul((x), NULL, 10))
static void help(const char *progname);
int
main(int argc, char *argv[])
{
static struct option long_options[] = {
{"list", no_argument, NULL, 'l'},
{"host", required_argument, NULL, 'h'},
{"port", required_argument, NULL, 'p'},
{"username", required_argument, NULL, 'U'},
{"no-password", no_argument, NULL, 'w'},
{"password", no_argument, NULL, 'W'},
{"dbname", required_argument, NULL, 'd'},
{"echo", no_argument, NULL, 'e'},
{NULL, 0, NULL, 0}
};
const char *progname;
int optindex;
int c;
bool listlangs = false;
const char *dbname = NULL;
char *host = NULL;
char *port = NULL;
char *username = NULL;
enum trivalue prompt_password = TRI_DEFAULT;
bool echo = false;
char *langname = NULL;
char *p;
PQExpBufferData sql;
PGconn *conn;
PGresult *result;
progname = get_progname(argv[0]);
set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
handle_help_version_opts(argc, argv, "droplang", help);
while ((c = getopt_long(argc, argv, "lh:p:U:wWd:e", long_options, &optindex)) != -1)
{
switch (c)
{
case 'l':
listlangs = true;
break;
case 'h':
host = pg_strdup(optarg);
break;
case 'p':
port = pg_strdup(optarg);
break;
case 'U':
username = pg_strdup(optarg);
break;
case 'w':
prompt_password = TRI_NO;
break;
case 'W':
prompt_password = TRI_YES;
break;
case 'd':
dbname = pg_strdup(optarg);
break;
case 'e':
echo = true;
break;
default:
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
}
/*
* We set dbname from positional arguments if it is not already set by
* option arguments -d. If not doing listlangs, positional dbname must
* follow positional langname.
*/
if (argc - optind > 0)
{
if (listlangs)
{
if (dbname == NULL)
dbname = argv[optind++];
}
else
{
langname = argv[optind++];
if (argc - optind > 0 && dbname == NULL)
dbname = argv[optind++];
}
}
if (argc - optind > 0)
{
fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
progname, argv[optind]);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
if (dbname == NULL)
{
if (getenv("PGDATABASE"))
dbname = getenv("PGDATABASE");
else if (getenv("PGUSER"))
dbname = getenv("PGUSER");
else
dbname = get_user_name_or_exit(progname);
}
initPQExpBuffer(&sql);
/*
* List option
*/
if (listlangs)
{
printQueryOpt popt;
static const bool translate_columns[] = {false, true};
conn = connectDatabase(dbname, host, port, username, prompt_password,
progname, false, false);
printfPQExpBuffer(&sql, "SELECT lanname as \"%s\", "
"(CASE WHEN lanpltrusted THEN '%s' ELSE '%s' END) as \"%s\" "
"FROM pg_catalog.pg_language WHERE lanispl;",
gettext_noop("Name"),
gettext_noop("yes"), gettext_noop("no"),
gettext_noop("Trusted?"));
result = executeQuery(conn, sql.data, progname, echo);
memset(&popt, 0, sizeof(popt));
popt.topt.format = PRINT_ALIGNED;
popt.topt.border = 1;
popt.topt.start_table = true;
popt.topt.stop_table = true;
popt.topt.encoding = PQclientEncoding(conn);
popt.title = _("Procedural Languages");
popt.translate_header = true;
popt.translate_columns = translate_columns;
popt.n_translate_columns = lengthof(translate_columns);
printQuery(result, &popt, stdout, false, NULL);
PQfinish(conn);
exit(0);
}
if (langname == NULL)
{
fprintf(stderr, _("%s: missing required argument language name\n"),
progname);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
progname);
exit(1);
}
/* lower case language name */
for (p = langname; *p; p++)
if (*p >= 'A' && *p <= 'Z')
*p += ('a' - 'A');
conn = connectDatabase(dbname, host, port, username, prompt_password,
progname, false, false);
/*
* Force schema search path to be just pg_catalog, so that we don't have
* to be paranoid about search paths below.
*/
executeCommand(conn, "SET search_path = pg_catalog;", progname, echo);
/*
* Make sure the language is installed
*/
printfPQExpBuffer(&sql, "SELECT oid "
"FROM pg_language WHERE lanname = '%s' AND lanispl;",
langname);
result = executeQuery(conn, sql.data, progname, echo);
if (PQntuples(result) == 0)
{
PQfinish(conn);
fprintf(stderr, _("%s: language \"%s\" is not installed in "
"database \"%s\"\n"),
progname, langname, dbname);
exit(1);
}
PQclear(result);
/*
* Attempt to drop the language. We do not use CASCADE, so that the drop
* will fail if there are any functions in the language.
*/
printfPQExpBuffer(&sql, "DROP EXTENSION \"%s\";", langname);
if (echo)
printf("%s\n", sql.data);
result = PQexec(conn, sql.data);
if (PQresultStatus(result) != PGRES_COMMAND_OK)
{
fprintf(stderr, _("%s: language removal failed: %s"),
progname, PQerrorMessage(conn));
PQfinish(conn);
exit(1);
}
PQclear(result);
PQfinish(conn);
exit(0);
}
static void
help(const char *progname)
{
printf(_("%s removes a procedural language from a database.\n\n"), progname);
printf(_("Usage:\n"));
printf(_(" %s [OPTION]... LANGNAME [DBNAME]\n"), progname);
printf(_("\nOptions:\n"));
printf(_(" -d, --dbname=DBNAME database from which to remove the language\n"));
printf(_(" -e, --echo show the commands being sent to the server\n"));
printf(_(" -l, --list show a list of currently installed languages\n"));
printf(_(" -V, --version output version information, then exit\n"));
printf(_(" -?, --help show this help, then exit\n"));
printf(_("\nConnection options:\n"));
printf(_(" -h, --host=HOSTNAME database server host or socket directory\n"));
printf(_(" -p, --port=PORT database server port\n"));
printf(_(" -U, --username=USERNAME user name to connect as\n"));
printf(_(" -w, --no-password never prompt for password\n"));
printf(_(" -W, --password force password prompt\n"));
printf(_("\nReport bugs to <pgsql-bugs@postgresql.org>.\n"));
}
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