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Posted to commits@airflow.apache.org by po...@apache.org on 2021/09/22 11:22:31 UTC

[airflow-pgbouncer-exporter] 22/27: Drop sqlx.

This is an automated email from the ASF dual-hosted git repository.

potiuk pushed a commit to branch migrate-to-latest-pgbouncer-exported
in repository https://gitbox.apache.org/repos/asf/airflow-pgbouncer-exporter.git

commit 1e7a7fa813c673ef7199a495ba6b95e86e09e32b
Author: Juraj Bubniak <ju...@gmail.com>
AuthorDate: Fri Jun 18 19:36:53 2021 +0200

    Drop sqlx.
---
 cmd/health.go                       |  12 +-
 cmd/server.go                       |  24 +-
 go.mod                              |   8 +-
 go.sum                              | 503 ++++++++++++++++++++----------------
 internal/collector/exporter.go      |  12 +-
 internal/collector/exporter_test.go |  62 ++---
 internal/domain/domain.go           |   3 -
 internal/server/http_test.go        |  98 ++-----
 internal/sqlstore/sql.go            | 341 ++++++++++++++++++++++++
 internal/sqlstore/sql_test.go       | 194 ++++++++++++++
 internal/store/mock.go              |  63 -----
 internal/store/sql.go               | 173 -------------
 12 files changed, 899 insertions(+), 594 deletions(-)

diff --git a/cmd/health.go b/cmd/health.go
index fd6e94d..2904383 100644
--- a/cmd/health.go
+++ b/cmd/health.go
@@ -2,10 +2,11 @@ package cmd
 
 import (
 	"context"
+	"database/sql"
 	"fmt"
 
 	"github.com/jbub/pgbouncer_exporter/internal/config"
-	"github.com/jbub/pgbouncer_exporter/internal/store"
+	"github.com/jbub/pgbouncer_exporter/internal/sqlstore"
 
 	"github.com/urfave/cli/v2"
 )
@@ -19,11 +20,14 @@ var Health = &cli.Command{
 
 func checkHealth(ctx *cli.Context) error {
 	cfg := config.LoadFromCLI(ctx)
-	st, err := store.NewSQL(cfg.DatabaseURL)
+
+	db, err := sql.Open("postgres", cfg.DatabaseURL)
 	if err != nil {
-		return fmt.Errorf("unable to initialize store: %v", err)
+		return fmt.Errorf("could not initialize store: %v", err)
 	}
-	defer st.Close()
+	defer db.Close()
+
+	st := sqlstore.New(db)
 
 	checkCtx, cancel := context.WithTimeout(context.Background(), cfg.StoreTimeout)
 	defer cancel()
diff --git a/cmd/server.go b/cmd/server.go
index 39cf0ef..ed4eae1 100644
--- a/cmd/server.go
+++ b/cmd/server.go
@@ -2,14 +2,15 @@ package cmd
 
 import (
 	"context"
+	"database/sql"
 	"fmt"
+	"log"
 
 	"github.com/jbub/pgbouncer_exporter/internal/collector"
 	"github.com/jbub/pgbouncer_exporter/internal/config"
 	"github.com/jbub/pgbouncer_exporter/internal/server"
-	"github.com/jbub/pgbouncer_exporter/internal/store"
+	"github.com/jbub/pgbouncer_exporter/internal/sqlstore"
 
-	"github.com/prometheus/common/log"
 	"github.com/prometheus/common/version"
 	"github.com/urfave/cli/v2"
 )
@@ -23,11 +24,14 @@ var Server = &cli.Command{
 
 func runServer(ctx *cli.Context) error {
 	cfg := config.LoadFromCLI(ctx)
-	st, err := store.NewSQL(cfg.DatabaseURL)
+
+	db, err := sql.Open("postgres", cfg.DatabaseURL)
 	if err != nil {
-		return fmt.Errorf("unable to initialize store: %v", err)
+		return fmt.Errorf("could not initialize store: %v", err)
 	}
-	defer st.Close()
+	defer db.Close()
+
+	st := sqlstore.New(db)
 
 	checkCtx, cancel := context.WithTimeout(context.Background(), cfg.StoreTimeout)
 	defer cancel()
@@ -39,13 +43,13 @@ func runServer(ctx *cli.Context) error {
 	exp := collector.New(cfg, st)
 	srv := server.New(cfg, exp)
 
-	log.Infoln("Starting ", collector.Name, version.Info())
-	log.Infoln("Server listening on", cfg.ListenAddress)
-	log.Infoln("Metrics available at", cfg.TelemetryPath)
-	log.Infoln("Build context", version.BuildContext())
+	log.Println("Starting ", collector.Name, version.Info())
+	log.Println("Server listening on", cfg.ListenAddress)
+	log.Println("Metrics available at", cfg.TelemetryPath)
+	log.Println("Build context", version.BuildContext())
 
 	if err := srv.Run(); err != nil {
-		return fmt.Errorf("unable to run server: %v", err)
+		return fmt.Errorf("could not run server: %v", err)
 	}
 	return nil
 }
diff --git a/go.mod b/go.mod
index d6428c4..03e01cb 100644
--- a/go.mod
+++ b/go.mod
@@ -3,10 +3,10 @@ module github.com/jbub/pgbouncer_exporter
 go 1.16
 
 require (
-	github.com/jmoiron/sqlx v1.3.1
-	github.com/lib/pq v1.9.0
-	github.com/prometheus/client_golang v1.9.0
-	github.com/prometheus/common v0.17.0
+	github.com/DATA-DOG/go-sqlmock v1.5.0
+	github.com/lib/pq v1.10.2
+	github.com/prometheus/client_golang v1.11.0
+	github.com/prometheus/common v0.29.0
 	github.com/stretchr/testify v1.7.0
 	github.com/urfave/cli/v2 v2.3.0
 )
diff --git a/go.sum b/go.sum
index 9ce67d9..6d0c6c9 100644
--- a/go.sum
+++ b/go.sum
@@ -1,152 +1,141 @@
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diff --git a/internal/collector/exporter.go b/internal/collector/exporter.go
index 9eb2fa6..3f59648 100644
--- a/internal/collector/exporter.go
+++ b/internal/collector/exporter.go
@@ -3,6 +3,7 @@ package collector
 import (
 	"context"
 	"fmt"
+	"log"
 	"strings"
 	"sync"
 
@@ -10,7 +11,6 @@ import (
 	"github.com/jbub/pgbouncer_exporter/internal/domain"
 
 	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/common/log"
 )
 
 const (
@@ -94,7 +94,7 @@ func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
 
 	res, err := e.getStoreResult(ctx)
 	if err != nil {
-		log.Errorf("could not get store result: %v", err)
+		log.Printf("could not get store result: %v", err)
 		return
 	}
 
@@ -122,7 +122,7 @@ func (e *Exporter) getStoreResult(ctx context.Context) (*storeResult, error) {
 	if e.cfg.ExportStats {
 		stats, err := e.stor.GetStats(ctx)
 		if err != nil {
-			return nil, fmt.Errorf("unable to get stats: %v", err)
+			return nil, fmt.Errorf("could not get stats: %v", err)
 		}
 		res.stats = stats
 	}
@@ -130,7 +130,7 @@ func (e *Exporter) getStoreResult(ctx context.Context) (*storeResult, error) {
 	if e.cfg.ExportPools {
 		pools, err := e.stor.GetPools(ctx)
 		if err != nil {
-			return nil, fmt.Errorf("unable to get pools: %v", err)
+			return nil, fmt.Errorf("could not get pools: %v", err)
 		}
 		res.pools = pools
 	}
@@ -138,7 +138,7 @@ func (e *Exporter) getStoreResult(ctx context.Context) (*storeResult, error) {
 	if e.cfg.ExportDatabases {
 		databases, err := e.stor.GetDatabases(ctx)
 		if err != nil {
-			return nil, fmt.Errorf("unable to get databases: %v", err)
+			return nil, fmt.Errorf("could not get databases: %v", err)
 		}
 		res.databases = databases
 	}
@@ -146,7 +146,7 @@ func (e *Exporter) getStoreResult(ctx context.Context) (*storeResult, error) {
 	if e.cfg.ExportLists {
 		lists, err := e.stor.GetLists(ctx)
 		if err != nil {
-			return nil, fmt.Errorf("unable to get lists: %v", err)
+			return nil, fmt.Errorf("could not get lists: %v", err)
 		}
 		res.lists = lists
 	}
diff --git a/internal/collector/exporter_test.go b/internal/collector/exporter_test.go
index b825a5a..92b5d51 100644
--- a/internal/collector/exporter_test.go
+++ b/internal/collector/exporter_test.go
@@ -5,64 +5,60 @@ import (
 	"testing"
 
 	"github.com/jbub/pgbouncer_exporter/internal/config"
-	"github.com/jbub/pgbouncer_exporter/internal/store"
+	"github.com/jbub/pgbouncer_exporter/internal/sqlstore"
 
+	"github.com/DATA-DOG/go-sqlmock"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/stretchr/testify/require"
 )
 
 func TestGetStoreResultExportEnabled(t *testing.T) {
+	db, mock, err := sqlmock.New()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
 	cfg := config.Config{
 		ExportStats:     true,
 		ExportPools:     true,
 		ExportDatabases: true,
 		ExportLists:     true,
 	}
-	st := store.NewMockStore()
-	defer st.Close()
 
-	exp := New(cfg, st)
+	exp := New(cfg, sqlstore.New(db))
 	ctx := context.Background()
 
-	res, err := exp.getStoreResult(ctx)
-	require.NoError(t, err)
-
-	require.True(t, st.StatsCalled)
-	require.True(t, st.PoolsCalled)
-	require.True(t, st.DatabasesCalled)
-	require.True(t, st.ListsCalled)
+	mock.ExpectQuery("SHOW STATS").WillReturnRows(sqlmock.NewRows(nil))
+	mock.ExpectQuery("SHOW POOLS").WillReturnRows(sqlmock.NewRows(nil))
+	mock.ExpectQuery("SHOW DATABASES").WillReturnRows(sqlmock.NewRows(nil))
+	mock.ExpectQuery("SHOW LISTS").WillReturnRows(sqlmock.NewRows(nil))
 
-	require.Equal(t, res.stats, st.Stats)
-	require.Equal(t, res.pools, st.Pools)
-	require.Equal(t, res.databases, st.Databases)
-	require.Equal(t, res.lists, st.Lists)
+	_, err = exp.getStoreResult(ctx)
+	require.NoError(t, err)
+	require.NoError(t, mock.ExpectationsWereMet())
 }
 
 func TestGetStoreResultExportDisabled(t *testing.T) {
+	db, mock, err := sqlmock.New()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
 	cfg := config.Config{
 		ExportStats:     false,
 		ExportPools:     false,
 		ExportDatabases: false,
 		ExportLists:     false,
 	}
-	st := store.NewMockStore()
-	defer st.Close()
 
-	exp := New(cfg, st)
+	exp := New(cfg, sqlstore.New(db))
 	ctx := context.Background()
 
-	res, err := exp.getStoreResult(ctx)
+	_, err = exp.getStoreResult(ctx)
 	require.NoError(t, err)
-
-	require.False(t, st.StatsCalled)
-	require.False(t, st.PoolsCalled)
-	require.False(t, st.DatabasesCalled)
-	require.False(t, st.ListsCalled)
-
-	require.Equal(t, res.stats, st.Stats)
-	require.Equal(t, res.pools, st.Pools)
-	require.Equal(t, res.databases, st.Databases)
-	require.Equal(t, res.lists, st.Lists)
+	require.NoError(t, mock.ExpectationsWereMet())
 }
 
 var (
@@ -103,6 +99,14 @@ var (
 				"key2": "value2",
 			},
 		},
+		{
+			name:  "multiple items with space",
+			value: "key=value key2=value2 ",
+			expected: prometheus.Labels{
+				"key":  "value",
+				"key2": "value2",
+			},
+		},
 	}
 )
 
diff --git a/internal/domain/domain.go b/internal/domain/domain.go
index 146be7f..33dfd27 100644
--- a/internal/domain/domain.go
+++ b/internal/domain/domain.go
@@ -80,7 +80,4 @@ type Store interface {
 
 	// Check checks the health of the store.
 	Check(ctx context.Context) error
-
-	// Close closes the store.
-	Close() error
 }
diff --git a/internal/server/http_test.go b/internal/server/http_test.go
index 01563c3..a16216a 100644
--- a/internal/server/http_test.go
+++ b/internal/server/http_test.go
@@ -4,12 +4,14 @@ import (
 	"fmt"
 	"net/http/httptest"
 	"testing"
+	"time"
 
 	"github.com/jbub/pgbouncer_exporter/internal/collector"
 	"github.com/jbub/pgbouncer_exporter/internal/config"
 	"github.com/jbub/pgbouncer_exporter/internal/domain"
-	"github.com/jbub/pgbouncer_exporter/internal/store"
+	"github.com/jbub/pgbouncer_exporter/internal/sqlstore"
 
+	"github.com/DATA-DOG/go-sqlmock"
 	"github.com/prometheus/common/expfmt"
 	"github.com/stretchr/testify/require"
 )
@@ -70,63 +72,6 @@ func metricName(subsystem string, name string) string {
 	return fmt.Sprintf("%v_%v_%v", collector.Name, subsystem, name)
 }
 
-func newTestingStore() *store.MockStore {
-	st := store.NewMockStore()
-	st.Stats = []domain.Stat{
-		{
-			Database:       "xx",
-			TotalRequests:  20,
-			TotalQueryTime: 344,
-			TotalSent:      203,
-			TotalReceived:  203,
-		},
-		{
-			Database:       "yy",
-			TotalRequests:  20,
-			TotalQueryTime: 344,
-			TotalSent:      203,
-			TotalReceived:  203,
-		},
-	}
-	st.Pools = []domain.Pool{
-		{
-			Database: "xx",
-			PoolMode: "transaction",
-			Active:   4,
-		},
-		{
-			Database: "yy",
-			PoolMode: "session",
-			Active:   6,
-		},
-	}
-	st.Databases = []domain.Database{
-		{
-			Name:               "xx",
-			Database:           "xx",
-			PoolMode:           "transaction",
-			CurrentConnections: 4,
-		},
-		{
-			Name:               "yy",
-			Database:           "yy",
-			PoolMode:           "session",
-			CurrentConnections: 6,
-		},
-	}
-	st.Lists = []domain.List{
-		{
-			List:  "xx",
-			Items: 54,
-		},
-		{
-			List:  "yy",
-			Items: 68,
-		},
-	}
-	return st
-}
-
 func newTestingServer(cfg config.Config, st domain.Store) *httptest.Server {
 	exp := collector.New(cfg, st)
 	httpSrv := New(cfg, exp)
@@ -144,35 +89,42 @@ func TestResponseContainsMetrics(t *testing.T) {
 				ExportDatabases: testCase.exportDatabases,
 				ExportStats:     testCase.exportStats,
 				ExportLists:     testCase.exportLists,
+				StoreTimeout:    time.Millisecond * 200,
 			}
 
-			st := newTestingStore()
-			defer st.Close()
+			db, mock, err := sqlmock.New()
+			if err != nil {
+				t.Fatal(err)
+			}
+			defer db.Close()
 
-			srv := newTestingServer(cfg, st)
+			srv := newTestingServer(cfg, sqlstore.New(db))
 			defer srv.Close()
 
-			client := srv.Client()
-			resp, err := client.Get(srv.URL + cfg.TelemetryPath)
-			require.NoError(t, err)
-			defer resp.Body.Close()
-
-			metrics, err := parser.TextToMetricFamilies(resp.Body)
-			require.NoError(t, err)
-
 			if cfg.ExportPools {
-				require.True(t, st.PoolsCalled)
+				mock.ExpectQuery("SHOW POOLS").WillReturnRows(sqlmock.NewRows([]string{"database"}).AddRow("mydb"))
 			}
+
 			if cfg.ExportStats {
-				require.True(t, st.StatsCalled)
+				mock.ExpectQuery("SHOW STATS").WillReturnRows(sqlmock.NewRows([]string{"database"}).AddRow("mydb"))
 			}
+
 			if cfg.ExportDatabases {
-				require.True(t, st.DatabasesCalled)
+				mock.ExpectQuery("SHOW DATABASES").WillReturnRows(sqlmock.NewRows([]string{"database"}).AddRow("mydb"))
 			}
+
 			if cfg.ExportLists {
-				require.True(t, st.ListsCalled)
+				mock.ExpectQuery("SHOW LISTS").WillReturnRows(sqlmock.NewRows([]string{"list"}).AddRow("mylist"))
 			}
 
+			client := srv.Client()
+			resp, err := client.Get(srv.URL + cfg.TelemetryPath)
+			require.NoError(t, err)
+			defer resp.Body.Close()
+
+			metrics, err := parser.TextToMetricFamilies(resp.Body)
+			require.NoError(t, err)
+
 			for _, expMetric := range testCase.metrics {
 				if _, ok := metrics[expMetric]; !ok {
 					require.FailNow(t, "metric not found", expMetric)
diff --git a/internal/sqlstore/sql.go b/internal/sqlstore/sql.go
new file mode 100644
index 0000000..f74c991
--- /dev/null
+++ b/internal/sqlstore/sql.go
@@ -0,0 +1,341 @@
+package sqlstore
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+
+	"github.com/jbub/pgbouncer_exporter/internal/domain"
+)
+
+type pool struct {
+	Database     string
+	User         string
+	Active       int64
+	Waiting      int64
+	ServerActive int64
+	ServerIdle   int64
+	ServerUsed   int64
+	ServerTested int64
+	ServerLogin  int64
+	MaxWait      int64
+	MaxWaitUs    int64
+	PoolMode     sql.NullString
+}
+
+type database struct {
+	Name               string
+	Host               sql.NullString
+	Port               int64
+	Database           string
+	ForceUser          sql.NullString
+	PoolSize           int64
+	ReservePool        int64
+	PoolMode           sql.NullString
+	MaxConnections     int64
+	CurrentConnections int64
+	Paused             int64
+	Disabled           int64
+}
+
+// New returns a new SQLStore.
+func New(db *sql.DB) *Store {
+	return &Store{db: db}
+}
+
+// Store is a sql based Store implementation.
+type Store struct {
+	db *sql.DB
+}
+
+// GetStats returns stats.
+func (s *Store) GetStats(ctx context.Context) ([]domain.Stat, error) {
+	rows, err := s.db.QueryContext(ctx, "SHOW STATS")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	columns, err := rows.Columns()
+	if err != nil {
+		return nil, err
+	}
+
+	var row domain.Stat
+	var stats []domain.Stat
+
+	for rows.Next() {
+		dest := make([]interface{}, 0, len(columns))
+
+		for _, column := range columns {
+			switch column {
+			case "database":
+				dest = append(dest, &row.Database)
+			case "total_requests":
+				dest = append(dest, &row.TotalRequests)
+			case "total_received":
+				dest = append(dest, &row.TotalReceived)
+			case "total_sent":
+				dest = append(dest, &row.TotalSent)
+			case "total_query_time":
+				dest = append(dest, &row.TotalQueryTime)
+			case "total_xact_count":
+				dest = append(dest, &row.TotalXactCount)
+			case "total_xact_time":
+				dest = append(dest, &row.TotalXactTime)
+			case "total_query_count":
+				dest = append(dest, &row.TotalQueryCount)
+			case "total_wait_time":
+				dest = append(dest, &row.TotalWaitTime)
+			case "avg_req":
+				dest = append(dest, &row.AverageRequests)
+			case "avg_recv":
+				dest = append(dest, &row.AverageReceived)
+			case "avg_sent":
+				dest = append(dest, &row.AverageSent)
+			case "avg_query":
+				dest = append(dest, &row.AverageQuery)
+			case "avg_query_count":
+				dest = append(dest, &row.AverageQueryCount)
+			case "avg_query_time":
+				dest = append(dest, &row.AverageQueryTime)
+			case "avg_xact_time":
+				dest = append(dest, &row.AverageXactTime)
+			case "avg_xact_count":
+				dest = append(dest, &row.AverageXactCount)
+			case "avg_wait_time":
+				dest = append(dest, &row.AverageWaitTime)
+			default:
+				return nil, fmt.Errorf("unexpected column: %v", column)
+			}
+		}
+
+		if err := rows.Scan(dest...); err != nil {
+			return nil, err
+		}
+		stats = append(stats, row)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return stats, nil
+}
+
+// GetPools returns pools.
+func (s *Store) GetPools(ctx context.Context) ([]domain.Pool, error) {
+	rows, err := s.db.QueryContext(ctx, "SHOW POOLS")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	columns, err := rows.Columns()
+	if err != nil {
+		return nil, err
+	}
+
+	var row pool
+	var pools []pool
+
+	for rows.Next() {
+		dest := make([]interface{}, 0, len(columns))
+
+		for _, column := range columns {
+			switch column {
+			case "database":
+				dest = append(dest, &row.Database)
+			case "user":
+				dest = append(dest, &row.User)
+			case "cl_active":
+				dest = append(dest, &row.Active)
+			case "cl_waiting":
+				dest = append(dest, &row.Waiting)
+			case "sv_active":
+				dest = append(dest, &row.ServerActive)
+			case "sv_idle":
+				dest = append(dest, &row.ServerIdle)
+			case "sv_used":
+				dest = append(dest, &row.ServerUsed)
+			case "sv_tested":
+				dest = append(dest, &row.ServerTested)
+			case "sv_login":
+				dest = append(dest, &row.ServerLogin)
+			case "maxwait":
+				dest = append(dest, &row.MaxWait)
+			case "maxwait_us":
+				dest = append(dest, &row.MaxWaitUs)
+			case "pool_mode":
+				dest = append(dest, &row.PoolMode)
+			default:
+				return nil, fmt.Errorf("unexpected column: %v", column)
+			}
+		}
+
+		if err := rows.Scan(dest...); err != nil {
+			return nil, err
+		}
+		pools = append(pools, row)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	var result []domain.Pool
+
+	for _, row := range pools {
+		result = append(result, domain.Pool{
+			Database:     row.Database,
+			User:         row.User,
+			Active:       row.Active,
+			Waiting:      row.Waiting,
+			ServerActive: row.ServerActive,
+			ServerIdle:   row.ServerIdle,
+			ServerUsed:   row.ServerUsed,
+			ServerTested: row.ServerTested,
+			ServerLogin:  row.ServerLogin,
+			MaxWait:      row.MaxWait,
+			MaxWaitUs:    row.MaxWaitUs,
+			PoolMode:     row.PoolMode.String,
+		})
+	}
+
+	return result, nil
+}
+
+// GetDatabases returns databases.
+func (s *Store) GetDatabases(ctx context.Context) ([]domain.Database, error) {
+	rows, err := s.db.QueryContext(ctx, "SHOW DATABASES")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	columns, err := rows.Columns()
+	if err != nil {
+		return nil, err
+	}
+
+	var row database
+	var databases []database
+
+	for rows.Next() {
+		dest := make([]interface{}, 0, len(columns))
+
+		for _, column := range columns {
+			switch column {
+			case "database":
+				dest = append(dest, &row.Database)
+			case "name":
+				dest = append(dest, &row.Name)
+			case "host":
+				dest = append(dest, &row.Host)
+			case "port":
+				dest = append(dest, &row.Port)
+			case "force_user":
+				dest = append(dest, &row.ForceUser)
+			case "pool_size":
+				dest = append(dest, &row.PoolSize)
+			case "reserve_pool":
+				dest = append(dest, &row.ReservePool)
+			case "pool_mode":
+				dest = append(dest, &row.PoolMode)
+			case "max_connections":
+				dest = append(dest, &row.MaxConnections)
+			case "current_connections":
+				dest = append(dest, &row.CurrentConnections)
+			case "paused":
+				dest = append(dest, &row.Paused)
+			case "disabled":
+				dest = append(dest, &row.Disabled)
+			default:
+				return nil, fmt.Errorf("unexpected column: %v", column)
+			}
+		}
+
+		if err := rows.Scan(dest...); err != nil {
+			return nil, err
+		}
+		databases = append(databases, row)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	var result []domain.Database
+
+	for _, row := range databases {
+		result = append(result, domain.Database{
+			Name:               row.Name,
+			Host:               row.Host.String,
+			Port:               row.Port,
+			Database:           row.Database,
+			ForceUser:          row.ForceUser.String,
+			PoolSize:           row.PoolSize,
+			ReservePool:        row.ReservePool,
+			PoolMode:           row.PoolMode.String,
+			MaxConnections:     row.MaxConnections,
+			CurrentConnections: row.CurrentConnections,
+			Paused:             row.Paused,
+			Disabled:           row.Disabled,
+		})
+	}
+
+	return result, nil
+}
+
+// GetLists returns lists.
+func (s *Store) GetLists(ctx context.Context) ([]domain.List, error) {
+	rows, err := s.db.QueryContext(ctx, "SHOW LISTS")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	columns, err := rows.Columns()
+	if err != nil {
+		return nil, err
+	}
+
+	var row domain.List
+	var lists []domain.List
+
+	for rows.Next() {
+		dest := make([]interface{}, 0, len(columns))
+
+		for _, column := range columns {
+			switch column {
+			case "list":
+				dest = append(dest, &row.List)
+			case "items":
+				dest = append(dest, &row.Items)
+			default:
+				return nil, fmt.Errorf("unexpected column: %v", column)
+			}
+		}
+
+		if err := rows.Scan(dest...); err != nil {
+			return nil, err
+		}
+		lists = append(lists, row)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return lists, nil
+}
+
+// Check checks the health of the store.
+func (s *Store) Check(ctx context.Context) error {
+	// we cant use db.Ping because it is making a ";" sql query which pgbouncer does not support
+	rows, err := s.db.QueryContext(ctx, "SHOW VERSION")
+	if err != nil {
+		return err
+	}
+	return rows.Close()
+}
diff --git a/internal/sqlstore/sql_test.go b/internal/sqlstore/sql_test.go
new file mode 100644
index 0000000..9fdf423
--- /dev/null
+++ b/internal/sqlstore/sql_test.go
@@ -0,0 +1,194 @@
+package sqlstore
+
+import (
+	"context"
+	"database/sql/driver"
+	"testing"
+
+	"github.com/DATA-DOG/go-sqlmock"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetStats(t *testing.T) {
+	db, mock, err := sqlmock.New()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	st := New(db)
+
+	data := map[string]interface{}{
+		"database":          "pgbouncer",
+		"total_requests":    1,
+		"total_received":    2,
+		"total_sent":        3,
+		"total_query_time":  4,
+		"total_xact_count":  5,
+		"total_xact_time":   6,
+		"total_query_count": 7,
+		"total_wait_time":   8,
+		"avg_req":           9,
+		"avg_recv":          10,
+		"avg_sent":          11,
+		"avg_query":         12,
+		"avg_query_count":   13,
+		"avg_query_time":    14,
+		"avg_xact_time":     15,
+		"avg_xact_count":    16,
+		"avg_wait_time":     17,
+	}
+
+	mock.ExpectQuery("SHOW STATS").WillReturnRows(mapToRows(data))
+
+	stats, err := st.GetStats(context.Background())
+	require.NoError(t, err)
+	require.NoError(t, mock.ExpectationsWereMet())
+
+	stat := stats[0]
+	require.Equal(t, data["database"].(string), stat.Database)
+	require.Equal(t, int64(data["total_requests"].(int)), stat.TotalRequests)
+	require.Equal(t, int64(data["total_received"].(int)), stat.TotalReceived)
+	require.Equal(t, int64(data["total_sent"].(int)), stat.TotalSent)
+	require.Equal(t, int64(data["total_query_time"].(int)), stat.TotalQueryTime)
+	require.Equal(t, int64(data["total_xact_count"].(int)), stat.TotalXactCount)
+	require.Equal(t, int64(data["total_xact_time"].(int)), stat.TotalXactTime)
+	require.Equal(t, int64(data["total_query_count"].(int)), stat.TotalQueryCount)
+	require.Equal(t, int64(data["total_wait_time"].(int)), stat.TotalWaitTime)
+	require.Equal(t, int64(data["avg_req"].(int)), stat.AverageRequests)
+	require.Equal(t, int64(data["avg_recv"].(int)), stat.AverageReceived)
+	require.Equal(t, int64(data["avg_sent"].(int)), stat.AverageSent)
+	require.Equal(t, int64(data["avg_query"].(int)), stat.AverageQuery)
+	require.Equal(t, int64(data["avg_query_count"].(int)), stat.AverageQueryCount)
+	require.Equal(t, int64(data["avg_query_time"].(int)), stat.AverageQueryTime)
+	require.Equal(t, int64(data["avg_xact_time"].(int)), stat.AverageXactTime)
+	require.Equal(t, int64(data["avg_xact_count"].(int)), stat.AverageXactCount)
+	require.Equal(t, int64(data["avg_wait_time"].(int)), stat.AverageWaitTime)
+}
+
+func TestGetPools(t *testing.T) {
+	db, mock, err := sqlmock.New()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	st := New(db)
+
+	data := map[string]interface{}{
+		"database":   "pgbouncer",
+		"user":       "myuser",
+		"cl_active":  1,
+		"cl_waiting": 2,
+		"sv_active":  3,
+		"sv_idle":    4,
+		"sv_used":    5,
+		"sv_tested":  6,
+		"sv_login":   7,
+		"maxwait":    8,
+		"maxwait_us": 9,
+		"pool_mode":  "transaction",
+	}
+
+	mock.ExpectQuery("SHOW POOLS").WillReturnRows(mapToRows(data))
+
+	pools, err := st.GetPools(context.Background())
+	require.NoError(t, err)
+	require.NoError(t, mock.ExpectationsWereMet())
+
+	pool := pools[0]
+	require.Equal(t, data["database"].(string), pool.Database)
+	require.Equal(t, data["user"].(string), pool.User)
+	require.Equal(t, int64(data["cl_active"].(int)), pool.Active)
+	require.Equal(t, int64(data["cl_waiting"].(int)), pool.Waiting)
+	require.Equal(t, int64(data["sv_active"].(int)), pool.ServerActive)
+	require.Equal(t, int64(data["sv_idle"].(int)), pool.ServerIdle)
+	require.Equal(t, int64(data["sv_used"].(int)), pool.ServerUsed)
+	require.Equal(t, int64(data["sv_tested"].(int)), pool.ServerTested)
+	require.Equal(t, int64(data["sv_login"].(int)), pool.ServerLogin)
+	require.Equal(t, int64(data["maxwait"].(int)), pool.MaxWait)
+	require.Equal(t, int64(data["maxwait_us"].(int)), pool.MaxWaitUs)
+	require.Equal(t, data["pool_mode"].(string), pool.PoolMode)
+}
+
+func TestGetDatabases(t *testing.T) {
+	db, mock, err := sqlmock.New()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	st := New(db)
+
+	data := map[string]interface{}{
+		"database":            "pgbouncer",
+		"name":                "myname",
+		"host":                "localhost",
+		"port":                23,
+		"force_user":          "myuser",
+		"pool_size":           4,
+		"reserve_pool":        5,
+		"pool_mode":           "transaction",
+		"max_connections":     7,
+		"current_connections": 8,
+		"paused":              9,
+		"disabled":            10,
+	}
+
+	mock.ExpectQuery("SHOW DATABASES").WillReturnRows(mapToRows(data))
+
+	databases, err := st.GetDatabases(context.Background())
+	require.NoError(t, err)
+	require.NoError(t, mock.ExpectationsWereMet())
+
+	database := databases[0]
+	require.Equal(t, data["database"].(string), database.Database)
+	require.Equal(t, data["name"].(string), database.Name)
+	require.Equal(t, data["host"].(string), database.Host)
+	require.Equal(t, int64(data["port"].(int)), database.Port)
+	require.Equal(t, data["force_user"].(string), database.ForceUser)
+	require.Equal(t, int64(data["pool_size"].(int)), database.PoolSize)
+	require.Equal(t, int64(data["reserve_pool"].(int)), database.ReservePool)
+	require.Equal(t, data["pool_mode"].(string), database.PoolMode)
+	require.Equal(t, int64(data["max_connections"].(int)), database.MaxConnections)
+	require.Equal(t, int64(data["current_connections"].(int)), database.CurrentConnections)
+	require.Equal(t, int64(data["paused"].(int)), database.Paused)
+	require.Equal(t, int64(data["disabled"].(int)), database.Disabled)
+}
+
+func TestGetLists(t *testing.T) {
+	db, mock, err := sqlmock.New()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	st := New(db)
+
+	data := map[string]interface{}{
+		"list":  "mylist",
+		"items": 6,
+	}
+
+	mock.ExpectQuery("SHOW LISTS").WillReturnRows(mapToRows(data))
+
+	lists, err := st.GetLists(context.Background())
+	require.NoError(t, err)
+	require.NoError(t, mock.ExpectationsWereMet())
+
+	list := lists[0]
+	require.Equal(t, data["list"].(string), list.List)
+	require.Equal(t, int64(data["items"].(int)), list.Items)
+}
+
+func mapToRows(data map[string]interface{}) *sqlmock.Rows {
+	columns := make([]string, 0, len(data))
+	values := make([]driver.Value, 0, len(data))
+	for k, v := range data {
+		columns = append(columns, k)
+		values = append(values, v)
+	}
+	rows := sqlmock.NewRows(columns)
+	rows.AddRow(values...)
+	return rows
+}
diff --git a/internal/store/mock.go b/internal/store/mock.go
deleted file mode 100644
index 2236172..0000000
--- a/internal/store/mock.go
+++ /dev/null
@@ -1,63 +0,0 @@
-package store
-
-import (
-	"context"
-
-	"github.com/jbub/pgbouncer_exporter/internal/domain"
-)
-
-// NewMockStore returns new MockStore.
-func NewMockStore() *MockStore {
-	return &MockStore{}
-}
-
-// MockStore is a Store implementation used for testing.
-type MockStore struct {
-	Stats     []domain.Stat
-	Pools     []domain.Pool
-	Databases []domain.Database
-	Lists     []domain.List
-
-	StatsCalled     bool
-	PoolsCalled     bool
-	DatabasesCalled bool
-	ListsCalled     bool
-	CloseCalled     bool
-	CheckCalled     bool
-}
-
-// GetStats returns stats.
-func (s *MockStore) GetStats(ctx context.Context) ([]domain.Stat, error) {
-	s.StatsCalled = true
-	return s.Stats, nil
-}
-
-// GetPools returns pools.
-func (s *MockStore) GetPools(ctx context.Context) ([]domain.Pool, error) {
-	s.PoolsCalled = true
-	return s.Pools, nil
-}
-
-// GetDatabases returns databases.
-func (s *MockStore) GetDatabases(ctx context.Context) ([]domain.Database, error) {
-	s.DatabasesCalled = true
-	return s.Databases, nil
-}
-
-// GetLists returns lists.
-func (s *MockStore) GetLists(ctx context.Context) ([]domain.List, error) {
-	s.ListsCalled = true
-	return s.Lists, nil
-}
-
-// Check checks the health of the store.
-func (s *MockStore) Check(ctx context.Context) error {
-	s.CheckCalled = true
-	return nil
-}
-
-// Close closes the store.
-func (s *MockStore) Close() error {
-	s.CloseCalled = true
-	return nil
-}
diff --git a/internal/store/sql.go b/internal/store/sql.go
deleted file mode 100644
index 3f3f570..0000000
--- a/internal/store/sql.go
+++ /dev/null
@@ -1,173 +0,0 @@
-package store
-
-import (
-	"context"
-	"database/sql"
-
-	"github.com/jbub/pgbouncer_exporter/internal/domain"
-
-	"github.com/jmoiron/sqlx"
-)
-
-type stat struct {
-	Database          string `db:"database"`
-	TotalRequests     int64  `db:"total_requests"`
-	TotalReceived     int64  `db:"total_received"`
-	TotalSent         int64  `db:"total_sent"`
-	TotalQueryTime    int64  `db:"total_query_time"`
-	TotalXactCount    int64  `db:"total_xact_count"`
-	TotalXactTime     int64  `db:"total_xact_time"`
-	TotalQueryCount   int64  `db:"total_query_count"`
-	TotalWaitTime     int64  `db:"total_wait_time"`
-	AverageRequests   int64  `db:"avg_req"`
-	AverageReceived   int64  `db:"avg_recv"`
-	AverageSent       int64  `db:"avg_sent"`
-	AverageQuery      int64  `db:"avg_query"`
-	AverageQueryCount int64  `db:"avg_query_count"`
-	AverageQueryTime  int64  `db:"avg_query_time"`
-	AverageXactTime   int64  `db:"avg_xact_time"`
-	AverageXactCount  int64  `db:"avg_xact_count"`
-	AverageWaitTime   int64  `db:"avg_wait_time"`
-}
-
-type pool struct {
-	Database     string         `db:"database"`
-	User         string         `db:"user"`
-	Active       int64          `db:"cl_active"`
-	Waiting      int64          `db:"cl_waiting"`
-	ServerActive int64          `db:"sv_active"`
-	ServerIdle   int64          `db:"sv_idle"`
-	ServerUsed   int64          `db:"sv_used"`
-	ServerTested int64          `db:"sv_tested"`
-	ServerLogin  int64          `db:"sv_login"`
-	MaxWait      int64          `db:"maxwait"`
-	MaxWaitUs    int64          `db:"maxwait_us"`
-	PoolMode     sql.NullString `db:"pool_mode"`
-}
-
-type database struct {
-	Name               string         `db:"name"`
-	Host               sql.NullString `db:"host"`
-	Port               int64          `db:"port"`
-	Database           string         `db:"database"`
-	ForceUser          sql.NullString `db:"force_user"`
-	PoolSize           int64          `db:"pool_size"`
-	ReservePool        int64          `db:"reserve_pool"`
-	PoolMode           sql.NullString `db:"pool_mode"`
-	MaxConnections     int64          `db:"max_connections"`
-	CurrentConnections int64          `db:"current_connections"`
-	Paused             int64          `db:"paused"`
-	Disabled           int64          `db:"disabled"`
-}
-
-type list struct {
-	List  string `db:"list"`
-	Items int64  `db:"items"`
-}
-
-// NewSQL returns a new SQLStore.
-func NewSQL(dataSource string) (*SQLStore, error) {
-	db, err := sqlx.Open("postgres", dataSource)
-	if err != nil {
-		return nil, err
-	}
-	return &SQLStore{db: db}, nil
-}
-
-// SQLStore is a sql based Store implementation.
-type SQLStore struct {
-	db *sqlx.DB
-}
-
-// GetStats returns stats.
-func (s *SQLStore) GetStats(ctx context.Context) ([]domain.Stat, error) {
-	var stats []stat
-	if err := s.db.SelectContext(ctx, &stats, "SHOW STATS"); err != nil {
-		return nil, err
-	}
-	var result []domain.Stat
-	for _, row := range stats {
-		result = append(result, domain.Stat(row))
-	}
-	return result, nil
-}
-
-// GetPools returns pools.
-func (s *SQLStore) GetPools(ctx context.Context) ([]domain.Pool, error) {
-	var pools []pool
-	if err := s.db.SelectContext(ctx, &pools, "SHOW POOLS"); err != nil {
-		return nil, err
-	}
-	var result []domain.Pool
-	for _, row := range pools {
-		result = append(result, domain.Pool{
-			Database:     row.Database,
-			User:         row.User,
-			Active:       row.Active,
-			Waiting:      row.Waiting,
-			ServerActive: row.ServerActive,
-			ServerIdle:   row.ServerIdle,
-			ServerUsed:   row.ServerUsed,
-			ServerTested: row.ServerTested,
-			ServerLogin:  row.ServerLogin,
-			MaxWait:      row.MaxWait,
-			MaxWaitUs:    row.MaxWaitUs,
-			PoolMode:     row.PoolMode.String,
-		})
-	}
-	return result, nil
-}
-
-// GetDatabases returns databases.
-func (s *SQLStore) GetDatabases(ctx context.Context) ([]domain.Database, error) {
-	var databases []database
-	if err := s.db.SelectContext(ctx, &databases, "SHOW DATABASES"); err != nil {
-		return nil, err
-	}
-	var result []domain.Database
-	for _, row := range databases {
-		result = append(result, domain.Database{
-			Name:               row.Name,
-			Host:               row.Host.String,
-			Port:               row.Port,
-			Database:           row.Database,
-			ForceUser:          row.ForceUser.String,
-			PoolSize:           row.PoolSize,
-			ReservePool:        row.ReservePool,
-			PoolMode:           row.PoolMode.String,
-			MaxConnections:     row.MaxConnections,
-			CurrentConnections: row.CurrentConnections,
-			Paused:             row.Paused,
-			Disabled:           row.Disabled,
-		})
-	}
-	return result, nil
-}
-
-// GetLists returns lists.
-func (s *SQLStore) GetLists(ctx context.Context) ([]domain.List, error) {
-	var lists []list
-	if err := s.db.SelectContext(ctx, &lists, "SHOW LISTS"); err != nil {
-		return nil, err
-	}
-	var result []domain.List
-	for _, row := range lists {
-		result = append(result, domain.List(row))
-	}
-	return result, nil
-}
-
-// Check checks the health of the store.
-func (s *SQLStore) Check(ctx context.Context) error {
-	// we cant use db.Ping because it is making a ";" sql query which pgbouncer does not support
-	rows, err := s.db.QueryContext(ctx, "SHOW VERSION")
-	if err != nil {
-		return err
-	}
-	return rows.Close()
-}
-
-// Close closes the store.
-func (s *SQLStore) Close() error {
-	return s.db.Close()
-}