postgresql plugin: constify

diff --git a/src/postgresql.c b/src/postgresql.c
index 87a56b7..7922683 100644 (file)
--- a/src/postgresql.c
+++ b/src/postgresql.c
@@ -154,7 +154,7 @@ typedef struct {
        int ref_cnt;
 } c_psql_database_t;
 
-static char *def_queries[] = {
+static const char *const def_queries[] = {
        "backends",
        "transactions",
        "queries",
@@ -429,9 +429,9 @@ static PGresult *c_psql_exec_query_noparams (c_psql_database_t *db,
 static PGresult *c_psql_exec_query_params (c_psql_database_t *db,
                udb_query_t *q, c_psql_user_data_t *data)
 {
-       char *params[db->max_params_num];
-       char  interval[64];
-       int   i;
+       const char *params[db->max_params_num];
+       char        interval[64];
+       int         i;
 
        if ((data == NULL) || (data->params_num == 0))
                return (c_psql_exec_query_noparams (db, q));