PostgreSQL

/*

** Zabbix

** Copyright 2001-2024 Zabbix SIA

**

** Licensed under the Apache License, Version 2.0 (the "License");

** you may not use this file except in compliance with the License.

** You may obtain a copy of the License at

**

**     http://www.apache.org/licenses/LICENSE-2.0

**

** Unless required by applicable law or agreed to in writing, software

** distributed under the License is distributed on an "AS IS" BASIS,

** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

** See the License for the specific language governing permissions and

** limitations under the License.

**/

​

package plugin

​

import (

    "context"

    "fmt"

    "strconv"

​

    "golang.zabbix.com/sdk/zbxerr"

)

​

// queriesHandler executes select from pg_database command and returns JSON if all is OK or nil otherwise.

func queriesHandler(ctx context.Context, conn PostgresClient,

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

    var queriesJSON string

​

    period, err := strconv.Atoi(params["TimePeriod"])

    if err != nil {

        return nil, zbxerr.ErrorInvalidParams.Wrap(

            fmt.Errorf("TimePeriod must be an integer, %s", err.Error()),

        )

    }

​

    if period < 1 {

        return nil, zbxerr.ErrorInvalidParams.Wrap(

            fmt.Errorf("TimePeriod must be greater than 0"),

        )

    }

​

    exp := `^(\\s*(--[^\\n]*\\n|/\\*.*\\*/|\\n))*(autovacuum|VACUUM|ANALYZE|REINDEX|CLUSTER|CREATE|ALTER|TRUNCATE|DROP)`

    query := fmt.Sprintf(`WITH T AS (

        SELECT

            db.datname,

            coalesce(T.query_time_max, 0) query_time_max,

            coalesce(T.tx_time_max, 0) tx_time_max,

            coalesce(T.mro_time_max, 0) mro_time_max,

            coalesce(T.query_time_sum, 0) query_time_sum,

            coalesce(T.tx_time_sum, 0) tx_time_sum,

            coalesce(T.mro_time_sum, 0) mro_time_sum,

            coalesce(T.query_slow_count, 0) query_slow_count,

            coalesce(T.tx_slow_count, 0) tx_slow_count,

            coalesce(T.mro_slow_count, 0) mro_slow_count

        FROM

            pg_database db NATURAL

            LEFT JOIN (

                SELECT

                    datname,

                    extract(

                        epoch

                        FROM

                            now()

                    ) :: integer ts,

                    coalesce(

                        max(

                            extract(

                                'epoch'

                                FROM

                                    (clock_timestamp() - query_start)

                            ) :: integer * (

                                state NOT IN (

                                    'idle',

                                    'idle in transaction',

                                    'idle in transaction (aborted)'

                                )

                                AND query !~* E'%s'

                            ) :: integer

                        ),

                        0

                    ) query_time_max,

                    coalesce(

                        max(

                            extract(

                                'epoch'

                                FROM

                                    (clock_timestamp() - query_start)