Zabbix

/*

** Zabbix

** Copyright (C) 2001-2022 Zabbix SIA

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** This program is distributed in the hope that it will be useful,

** but WITHOUT ANY WARRANTY; without even the implied warranty of

** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

** GNU General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

package postgres

​

import (

    "context"

    "errors"

    "fmt"

​

    "git.zabbix.com/ap/plugin-support/zbxerr"

    "github.com/jackc/pgx/v4"

)

​

const pgVersionWithChecksum = 120000

​

// dbStatHandler executes select from pg_catalog.pg_stat_database

// command for each database and returns JSON if all is OK or nil otherwise.

func dbStatHandler(ctx context.Context, conn PostgresClient,

    key string, _ map[string]string, _ ...string) (interface{}, error) {

    var statJSON, query string

​

    switch key {

    case keyDBStatSum:

        query = `

  SELECT row_to_json (T)

    FROM  (

      SELECT

        sum(numbackends) as numbackends

      , sum(xact_commit) as xact_commit

      , sum(xact_rollback) as xact_rollback

      , sum(blks_read) as blks_read

      , sum(blks_hit) as blks_hit

      , sum(tup_returned) as tup_returned

      , sum(tup_fetched) as tup_fetched

      , sum(tup_inserted) as tup_inserted

      , sum(tup_updated) as tup_updated

      , sum(tup_deleted) as tup_deleted

      , sum(conflicts) as conflicts

      , sum(temp_files) as temp_files

      , sum(temp_bytes) as temp_bytes

      , sum(deadlocks) as deadlocks

      , %s as checksum_failures

      , sum(blk_read_time) as blk_read_time

      , sum(blk_write_time) as blk_write_time

      FROM pg_catalog.pg_stat_database

    ) T ;`