#define log_warn(...) WARNING ("postgresql: " __VA_ARGS__)
#define log_info(...) INFO ("postgresql: " __VA_ARGS__)
+#ifndef C_PSQL_DEFAULT_CONF
+# define C_PSQL_DEFAULT_CONF PKGDATADIR "/postgresql_default.conf"
+#endif
+
/* Appends the (parameter, value) pair to the string
* pointed to by 'buf' suitable to be used as argument
* for PQconnectdb(). If value equals NULL, the pair
C_PSQL_IS_UNIX_DOMAIN_SOCKET (host) ? "/.s.PGSQL." : ":", \
port
+typedef enum {
+ C_PSQL_PARAM_HOST = 1,
+ C_PSQL_PARAM_DB,
+ C_PSQL_PARAM_USER,
+} c_psql_param_t;
+
typedef struct {
char *type;
char *type_instance;
char *name;
char *query;
+ c_psql_param_t *params;
+ int params_num;
+
c_psql_col_t *cols;
int cols_num;
} c_psql_query_t;
PGconn *conn;
c_complain_t conn_complaint;
+ int max_params_num;
+
/* user configuration */
c_psql_query_t **queries;
int queries_num;
char *service;
} c_psql_database_t;
+static char *def_queries[] = {
+ "user_tables",
+ "io_user_tables"
+};
+static int def_queries_num = STATIC_ARRAY_SIZE (def_queries);
+
static c_psql_query_t *queries = NULL;
static int queries_num = 0;
query->name = sstrdup (name);
query->query = NULL;
+ query->params = NULL;
+ query->params_num = 0;
+
query->cols = NULL;
query->cols_num = 0;
return query;
sfree (query->name);
sfree (query->query);
+ sfree (query->params);
+ query->params_num = 0;
+
for (i = 0; i < query->cols_num; ++i) {
sfree (query->cols[i].type);
sfree (query->cols[i].type_instance);
db->conn_complaint.last = 0;
db->conn_complaint.interval = 0;
+ db->max_params_num = 0;
+
db->queries = NULL;
db->queries_num = 0;
c_psql_query_t *query;
PGresult *res;
+ char *params[db->max_params_num];
+
int rows, cols;
int i;
query = db->queries[idx];
- res = PQexec (db->conn, query->query);
+ assert (db->max_params_num >= query->params_num);
+
+ for (i = 0; i < query->params_num; ++i) {
+ switch (query->params[i]) {
+ case C_PSQL_PARAM_HOST:
+ params[i] = (NULL == db->host) ? "localhost" : db->host;
+ break;
+ case C_PSQL_PARAM_DB:
+ params[i] = db->database;
+ break;
+ case C_PSQL_PARAM_USER:
+ params[i] = db->user;
+ break;
+ default:
+ assert (0);
+ }
+ }
+
+ res = PQexecParams (db->conn, query->query, query->params_num, NULL,
+ (const char *const *)((0 == query->params_num) ? NULL : params),
+ NULL, NULL, /* return text data */ 0);
if (PGRES_TUPLES_OK != PQresultStatus (res)) {
log_err ("Failed to execute SQL query: %s",
return 0;
} /* c_psql_stat_database */
-static int c_psql_stat_user_tables (c_psql_database_t *db)
-{
- const char *const query =
- "SELECT sum(seq_scan), sum(seq_tup_read), "
- "sum(idx_scan), sum(idx_tup_fetch), "
- "sum(n_tup_ins), sum(n_tup_upd), sum(n_tup_del), "
- "sum(n_tup_hot_upd), sum(n_live_tup), sum(n_dead_tup) "
- "FROM pg_stat_user_tables;";
-
- PGresult *res;
-
- int n;
-
- res = PQexec (db->conn, query);
-
- if (PGRES_TUPLES_OK != PQresultStatus (res)) {
- log_err ("Failed to execute SQL query: %s",
- PQerrorMessage (db->conn));
- log_info ("SQL query was: %s", query);
- PQclear (res);
- return -1;
- }
-
- n = PQntuples (res);
- assert (1 >= n);
-
- if (1 > n) /* no user tables */
- return 0;
-
- submit_counter (db, "pg_scan", "seq", PQgetvalue (res, 0, 0));
- submit_counter (db, "pg_scan", "seq_tup_read", PQgetvalue (res, 0, 1));
- submit_counter (db, "pg_scan", "idx", PQgetvalue (res, 0, 2));
- submit_counter (db, "pg_scan", "idx_tup_fetch", PQgetvalue (res, 0, 3));
-
- submit_counter (db, "pg_n_tup_c", "ins", PQgetvalue (res, 0, 4));
- submit_counter (db, "pg_n_tup_c", "upd", PQgetvalue (res, 0, 5));
- submit_counter (db, "pg_n_tup_c", "del", PQgetvalue (res, 0, 6));
- submit_counter (db, "pg_n_tup_c", "hot_upd", PQgetvalue (res, 0, 7));
-
- submit_gauge (db, "pg_n_tup_g", "live", PQgetvalue (res, 0, 8));
- submit_gauge (db, "pg_n_tup_g", "dead", PQgetvalue (res, 0, 9));
-
- PQclear (res);
- return 0;
-} /* c_psql_stat_user_tables */
-
-static int c_psql_statio_user_tables (c_psql_database_t *db)
-{
- const char *const query =
- "SELECT sum(heap_blks_read), sum(heap_blks_hit), "
- "sum(idx_blks_read), sum(idx_blks_hit), "
- "sum(toast_blks_read), sum(toast_blks_hit), "
- "sum(tidx_blks_read), sum(tidx_blks_hit) "
- "FROM pg_statio_user_tables;";
-
- PGresult *res;
-
- int n;
-
- res = PQexec (db->conn, query);
-
- if (PGRES_TUPLES_OK != PQresultStatus (res)) {
- log_err ("Failed to execute SQL query: %s",
- PQerrorMessage (db->conn));
- log_info ("SQL query was: %s", query);
- PQclear (res);
- return -1;
- }
-
- n = PQntuples (res);
- assert (1 >= n);
-
- if (1 > n) /* no user tables */
- return 0;
-
- submit_counter (db, "pg_blks", "heap_read", PQgetvalue (res, 0, 0));
- submit_counter (db, "pg_blks", "heap_hit", PQgetvalue (res, 0, 1));
-
- submit_counter (db, "pg_blks", "idx_read", PQgetvalue (res, 0, 2));
- submit_counter (db, "pg_blks", "idx_hit", PQgetvalue (res, 0, 3));
-
- submit_counter (db, "pg_blks", "toast_read", PQgetvalue (res, 0, 4));
- submit_counter (db, "pg_blks", "toast_hit", PQgetvalue (res, 0, 5));
-
- submit_counter (db, "pg_blks", "tidx_read", PQgetvalue (res, 0, 6));
- submit_counter (db, "pg_blks", "tidx_hit", PQgetvalue (res, 0, 7));
-
- PQclear (res);
- return 0;
-} /* c_psql_statio_user_tables */
-
static int c_psql_read (void)
{
int success = 0;
continue;
c_psql_stat_database (db);
- c_psql_stat_user_tables (db);
- c_psql_statio_user_tables (db);
for (j = 0; j < db->queries_num; ++j)
c_psql_exec_query (db, j);
return 0;
} /* config_set */
+static int config_set_param (c_psql_query_t *query, const oconfig_item_t *ci)
+{
+ c_psql_param_t param;
+ char *param_str;
+
+ if ((0 != ci->children_num) || (1 != ci->values_num)
+ || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
+ log_err ("Param expects a single string argument.");
+ return 1;
+ }
+
+ param_str = ci->values[0].value.string;
+ if (0 == strcasecmp (param_str, "hostname"))
+ param = C_PSQL_PARAM_HOST;
+ else if (0 == strcasecmp (param_str, "database"))
+ param = C_PSQL_PARAM_DB;
+ else if (0 == strcasecmp (param_str, "username"))
+ param = C_PSQL_PARAM_USER;
+ else {
+ log_err ("Invalid parameter \"%s\".", param_str);
+ return 1;
+ }
+
+ ++query->params_num;
+ if (NULL == (query->params = (c_psql_param_t *)realloc (query->params,
+ query->params_num * sizeof (*query->params)))) {
+ log_err ("Out of memory.");
+ exit (5);
+ }
+
+ query->params[query->params_num - 1] = param;
+ return 0;
+} /* config_set_param */
+
static int config_set_column (c_psql_query_t *query, const oconfig_item_t *ci)
{
c_psql_col_t *col;
exit (5);
}
+ if (query->params_num > db->max_params_num)
+ db->max_params_num = query->params_num;
+
db->queries[db->queries_num - 1] = query;
return 0;
} /* config_set_query */
if (0 == strcasecmp (c->key, "Query"))
config_set ("Query", &query->query, c);
+ else if (0 == strcasecmp (c->key, "Param"))
+ config_set_param (query, c);
else if (0 == strcasecmp (c->key, "Column"))
config_set_column (query, c);
else
else
log_warn ("Ignoring unknown config key \"%s\".", c->key);
}
+
+ if (NULL == db->queries) {
+ db->queries = (c_psql_query_t **)malloc (def_queries_num
+ * sizeof (*db->queries));
+
+ for (i = 0; i < def_queries_num; ++i) {
+ db->queries[i] = c_psql_query_get (def_queries[i]);
+ if (NULL == db->queries[i])
+ log_err ("Query \"%s\" not found - "
+ "please check your installation.",
+ def_queries[i]);
+ else
+ ++db->queries_num;
+ }
+ }
return 0;
}
static int c_psql_config (oconfig_item_t *ci)
{
+ static int have_def_config = 0;
+
int i;
+ if (0 == have_def_config) {
+ oconfig_item_t *c;
+
+ have_def_config = 1;
+
+ c = oconfig_parse_file (C_PSQL_DEFAULT_CONF);
+ if (NULL == c)
+ log_err ("Failed to read default config ("C_PSQL_DEFAULT_CONF").");
+ else
+ c_psql_config (c);
+
+ if (NULL == queries)
+ log_err ("Default config ("C_PSQL_DEFAULT_CONF") did not define "
+ "any queries - please check your installation.");
+ }
+
for (i = 0; i < ci->children_num; ++i) {
oconfig_item_t *c = ci->children + i;
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