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Make command-line tools smarter about finding a DB to connect to.

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If unable to connect to "postgres", try "template1".  This allows things to
work more smoothly in the case where the postgres database has been
dropped.  And just in case that's not good enough, also allow the user to
specify a maintenance database to be used for the initial connection, to
cover the case where neither postgres nor template1 is suitable.
This commit is contained in:
Robert Haas
2011-12-06 08:48:15 -05:00
parent 6ef4ae1d4e
commit 68281e0054
16 changed files with 188 additions and 36 deletions
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20
src/bin/scripts/clusterdb.c
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@ -18,7 +18,8 @@ static void cluster_one_database(const char *dbname, bool verbose, const char *t
const char *host, const char *port,
const char *username, enum trivalue prompt_password,
const char *progname, bool echo);
static void cluster_all_databases(bool verbose, const char *host, const char *port,
static void cluster_all_databases(bool verbose, const char *maintenance_db,
const char *host, const char *port,
const char *username, enum trivalue prompt_password,
const char *progname, bool echo, bool quiet);
@ -40,6 +41,7 @@ main(int argc, char *argv[])
{"all", no_argument, NULL, 'a'},
{"table", required_argument, NULL, 't'},
{"verbose", no_argument, NULL, 'v'},
{"maintenance-db", required_argument, NULL, 2},
{NULL, 0, NULL, 0}
};
@ -48,6 +50,7 @@ main(int argc, char *argv[])
int c;
const char *dbname = NULL;
const char *maintenance_db = NULL;
char *host = NULL;
char *port = NULL;
char *username = NULL;
@ -100,6 +103,9 @@ main(int argc, char *argv[])
case 'v':
verbose = true;
break;
case 2:
maintenance_db = optarg;
break;
default:
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
@ -137,7 +143,7 @@ main(int argc, char *argv[])
exit(1);
}
cluster_all_databases(verbose, host, port, username, prompt_password,
cluster_all_databases(verbose, maintenance_db, host, port, username, prompt_password,
progname, echo, quiet);
}
else
@ -180,7 +186,8 @@ cluster_one_database(const char *dbname, bool verbose, const char *table,
appendPQExpBuffer(&sql, " %s", table);
appendPQExpBuffer(&sql, ";\n");
conn = connectDatabase(dbname, host, port, username, prompt_password, progname);
conn = connectDatabase(dbname, host, port, username, prompt_password,
progname, false);
if (!executeMaintenanceCommand(conn, sql.data, echo))
{
if (table)
@ -198,7 +205,8 @@ cluster_one_database(const char *dbname, bool verbose, const char *table,
static void
cluster_all_databases(bool verbose, const char *host, const char *port,
cluster_all_databases(bool verbose, const char *maintenance_db,
const char *host, const char *port,
const char *username, enum trivalue prompt_password,
const char *progname, bool echo, bool quiet)
{
@ -206,7 +214,8 @@ cluster_all_databases(bool verbose, const char *host, const char *port,
PGresult *result;
int i;
conn = connectDatabase("postgres", host, port, username, prompt_password, progname);
conn = connectMaintenanceDatabase(maintenance_db, host, port, username,
prompt_password, progname);
result = executeQuery(conn, "SELECT datname FROM pg_database WHERE datallowconn ORDER BY 1;", progname, echo);
PQfinish(conn);
@ -250,6 +259,7 @@ help(const char *progname)
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(_(" --maintenance-db=DBNAME alternate maintenance database\n"));
printf(_("\nRead the description of the SQL command CLUSTER for details.\n"));
printf(_("\nReport bugs to <pgsql-bugs@postgresql.org>.\n"));
}