fix: postgres embed - use direct sql statements instead of asset paths

pkg/repository/postgres/postgres.go

@@ -15,55 +15,99 @@ import (
 	"github.com/johejo/golang-migrate-extra/source/iofs"
 )
 
+var (
 	//go:embed ddl/*.sql
-var postgresDDLAssets embed.FS
+	postgresDDLAssets embed.FS
 
-//go:embed dml/*.sql
+	//go:embed dml/deleteDeviceByID.sql
-var postgresDMLAssets embed.FS
+	deleteDeviceByIDSQL string
 
-const (
+	//go:embed dml/deleteDeviceByName.sql
-	postgresDDLAssetPath = "ddl"
+	deleteDeviceByNameSQL string
-	postgresDMLAssetPath = "dml"
 
-	deleteDeviceByIDSQLFile   = postgresDMLAssetPath + "/deleteDeviceByID.sql"
+	//go:embed dml/deleteSensorByID.sql
-	deleteDeviceByNameSQLFile = postgresDMLAssetPath + "/deleteDeviceByName.sql"
+	deleteSensorByIDSQL string
 
-	deleteSensorByIDSQLFile   = postgresDMLAssetPath + "/deleteSensorByID.sql"
+	//go:embed dml/deleteSensorByName.sql
-	deleteSensorByNameSQLFile = postgresDMLAssetPath + "/deleteSensorByName.sql"
+	deleteSensorByNameSQL string
 
-	insertDeviceSQLFile      = postgresDMLAssetPath + "/insertDevice.sql"
+	//go:embed dml/insertDevice.sql
-	insertSensorSQLFile      = postgresDMLAssetPath + "/insertSensor.sql"
+	insertDeviceSQL string
-	insertHumiditySQLFile    = postgresDMLAssetPath + "/insertHumidity.sql"
-	insertPressureSQLFile    = postgresDMLAssetPath + "/insertPressure.sql"
-	insertTemperatureSQLFile = postgresDMLAssetPath + "/insertTemperature.sql"
 
-	insertOrUpdateDeviceSQLFile      = postgresDMLAssetPath + "/insertOrUpdateDevice.sql"
+	//go:embed dml/insertHumidity.sql
-	insertOrUpdateSensorSQLFile      = postgresDMLAssetPath + "/insertOrUpdateSensor.sql"
+	insertHumiditySQL string
-	insertOrUpdateHumiditySQLFile    = postgresDMLAssetPath + "/insertOrUpdateHumidity.sql"
-	insertOrUpdatePressureSQLFile    = postgresDMLAssetPath + "/insertOrUpdatePressure.sql"
-	insertOrUpdateTemperatureSQLFile = postgresDMLAssetPath + "/insertOrUpdateTemperature.sql"
 
-	selectDeviceByIDSQLFile   = postgresDMLAssetPath + "/selectDeviceByID.sql"
+	//go:embed dml/insertOrUpdateDevice.sql
-	selectDeviceByNameSQLFile = postgresDMLAssetPath + "/selectDeviceByName.sql"
+	insertOrUpdateDeviceSQL string
-	selectDevicesSQLFile      = postgresDMLAssetPath + "/selectDevices.sql"
 
-	selectSensorByIDSQLFile        = postgresDMLAssetPath + "/selectSensorByID.sql"
+	//go:embed dml/insertOrUpdateHumidity.sql
-	selectSensorsSQLFile           = postgresDMLAssetPath + "/selectSensors.sql"
+	insertOrUpdateHumiditySQL string
-	selectSensorsByDeviceIDSQLFile = postgresDMLAssetPath + "/selectSensorsByDeviceID.sql"
-	selectSensorsByModelSQLFile    = postgresDMLAssetPath + "/selectSensorsByModel.sql"
-	selectSensorsByNameSQLFile     = postgresDMLAssetPath + "/selectSensorsByName.sql"
 
-	selectHumidityByIDSQLFile = postgresDMLAssetPath + "/selectHumidityByID.sql"
+	//go:embed dml/insertOrUpdatePressure.sql
-	selectHumiditiesSQLFile   = postgresDMLAssetPath + "/selectHumidities.sql"
+	insertOrUpdatePressureSQL string
 
-	selectPressureByIDSQLFile = postgresDMLAssetPath + "/selectPressureByID.sql"
+	//go:embed dml/insertOrUpdateSensor.sql
-	selectPressuresSQLFile    = postgresDMLAssetPath + "/selectPressures.sql"
+	insertOrUpdateSensorSQL string
 
-	selectTemperatureByIDSQLFile = postgresDMLAssetPath + "/selectTemperatureByID.sql"
+	//go:embed dml/insertOrUpdateTemperature.sql
-	selectTemperaturesSQLFile    = postgresDMLAssetPath + "/selectTemperatures.sql"
+	insertOrUpdateTemperatureSQL string
 
-	updateDeviceSQLFile = postgresDMLAssetPath + "/updateDevice.sql"
+	//go:embed dml/insertPressure.sql
-	updateSensorSQLFile = postgresDMLAssetPath + "/updateSensor.sql"
+	insertPressureSQL string
+
+	//go:embed dml/insertSensor.sql
+	insertSensorSQL string
+
+	//go:embed dml/insertTemperature.sql
+	insertTemperatureSQL string
+
+	//go:embed dml/selectDeviceByID.sql
+	selectDeviceByIDSQL string
+
+	//go:embed dml/selectDeviceByName.sql
+	selectDeviceByNameSQL string
+
+	//go:embed dml/selectDevices.sql
+	selectDevicesSQL string
+
+	//go:embed dml/selectHumidities.sql
+	selectHumiditiesSQL string
+
+	//go:embed dml/selectHumidityByID.sql
+	selectHumidityByIDSQL string
+
+	//go:embed dml/selectPressureByID.sql
+	selectPressureByIDSQL string
+
+	//go:embed dml/selectPressures.sql
+	selectPressuresSQL string
+
+	//go:embed dml/selectSensorByID.sql
+	selectSensorByIDSQL string
+
+	//go:embed dml/selectSensors.sql
+	selectSensorsSQL string
+
+	//go:embed dml/selectSensorsByDeviceID.sql
+	selectSensorsByDeviceIDSQL string
+
+	//go:embed dml/selectSensorsByModel.sql
+	selectSensorsByModelSQL string
+
+	//go:embed dml/selectSensorsByName.sql
+	selectSensorsByNameSQL string
+
+	//go:embed dml/selectTemperatureByID.sql
+	selectTemperatureByIDSQL string
+
+	//go:embed dml/selectTemperatures.sql
+	selectTemperaturesSQL string
+
+	//go:embed dml/updateDevice.sql
+	updateDeviceSQL string
+
+	//go:embed dml/updateSensor.sql
+	updateSensorSQL string
 )
 
 type Opts struct {
@@ -129,12 +173,7 @@ func (postgres *Postgres) AddDevices(ctx context.Context, devices ...*types.Devi
 }
 
 func (postgres *Postgres) insertDevices(tx *sql.Tx, devices ...*types.Device) error {
-	f, err := postgresDMLAssets.ReadFile(insertDeviceSQLFile)
+	stmt, err := tx.Prepare(insertDeviceSQL)
-	if err != nil {
-		return fmt.Errorf("Failed to read file %v: %w", insertDeviceSQLFile, err)
-	}
-
-	stmt, err := tx.Prepare(string(f))
 	if err != nil {
 		return fmt.Errorf("Failed to prepare statement: %v", err)
 	}
@@ -162,18 +201,13 @@ func (postgres *Postgres) insertDevices(tx *sql.Tx, devices ...*types.Device) er
 }
 
 func (postgres *Postgres) AddOrUpdateDevices(ctx context.Context, devices ...*types.Device) error {
-	f, err := postgresDMLAssets.ReadFile(insertOrUpdateDeviceSQLFile)
-	if err != nil {
-		return fmt.Errorf("Failed to read file %v: %w", insertOrUpdateDeviceSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
 	if err != nil {
 		return fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	stmt, err := tx.Prepare(string(f))
+	stmt, err := tx.Prepare(insertOrUpdateDeviceSQL)
 	if err != nil {
 		return fmt.Errorf("Failed to prepare statement: %w", err)
 	}
@@ -218,13 +252,8 @@ func (postgres *Postgres) AddMeasuredValues(ctx context.Context, measuredValues
 	defer tx.Rollback()
 
 	// General insert function
-	insert := func(tx *sql.Tx, queryFile string, measuredValues []*types.MeasuredValue) error {
+	insert := func(tx *sql.Tx, query string, measuredValues []*types.MeasuredValue) error {
-		f, err := postgresDMLAssets.ReadFile(queryFile)
+		stmt, err := tx.Prepare(query)
-		if err != nil {
-			return fmt.Errorf("Failed to read file %v: %w", queryFile, err)
-		}
-
-		stmt, err := tx.Prepare(string(f))
 		if err != nil {
 			return fmt.Errorf("Failed to prepare statement: %v", err)
 		}
@@ -258,11 +287,11 @@ func (postgres *Postgres) AddMeasuredValues(ctx context.Context, measuredValues
 
 		switch measuredValueType {
 		case types.Humidity:
-			queryFile = insertHumiditySQLFile
+			queryFile = insertHumiditySQL
 		case types.Pressure:
-			queryFile = insertPressureSQLFile
+			queryFile = insertPressureSQL
 		case types.Temperature:
-			queryFile = insertTemperatureSQLFile
+			queryFile = insertTemperatureSQL
 		default:
 			return fmt.Errorf("Measured value type %v not supported", measuredValueType)
 		}
@@ -294,13 +323,8 @@ func (postgres *Postgres) AddOrUpdateMeasuredValues(ctx context.Context, measure
 	defer tx.Rollback()
 
 	// General insert function
-	insert := func(tx *sql.Tx, queryFile string, measuredValues []*types.MeasuredValue) error {
+	insert := func(tx *sql.Tx, query string, measuredValues []*types.MeasuredValue) error {
-		f, err := postgresDMLAssets.ReadFile(queryFile)
+		stmt, err := tx.Prepare(query)
-		if err != nil {
-			return fmt.Errorf("Failed to read file %v: %w", queryFile, err)
-		}
-
-		stmt, err := tx.Prepare(string(f))
 		if err != nil {
 			return fmt.Errorf("Failed to prepare statement: %v", err)
 		}
@@ -334,11 +358,11 @@ func (postgres *Postgres) AddOrUpdateMeasuredValues(ctx context.Context, measure
 
 		switch measuredValueType {
 		case types.Humidity:
-			queryFile = insertOrUpdateHumiditySQLFile
+			queryFile = insertOrUpdateHumiditySQL
 		case types.Pressure:
-			queryFile = insertOrUpdatePressureSQLFile
+			queryFile = insertOrUpdatePressureSQL
 		case types.Temperature:
-			queryFile = insertOrUpdateTemperatureSQLFile
+			queryFile = insertOrUpdateTemperatureSQL
 		default:
 			return fmt.Errorf("Measured value type %v not supported", measuredValueType)
 		}
@@ -354,18 +378,13 @@ func (postgres *Postgres) AddOrUpdateMeasuredValues(ctx context.Context, measure
 
 // AddSensors into the database
 func (postgres *Postgres) AddSensors(ctx context.Context, sensors ...*types.Sensor) error {
-	f, err := postgresDMLAssets.ReadFile(insertSensorSQLFile)
-	if err != nil {
-		return fmt.Errorf("Failed to read file %v: %w", insertSensorSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
 	if err != nil {
 		return fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	stmt, err := tx.Prepare(string(f))
+	stmt, err := tx.Prepare(insertSensorSQL)
 	if err != nil {
 		return fmt.Errorf("Failed to prepare statement: %v", err)
 	}
@@ -402,18 +421,13 @@ func (postgres *Postgres) AddSensors(ctx context.Context, sensors ...*types.Sens
 
 // AddOrUpdateSensors into the database
 func (postgres *Postgres) AddOrUpdateSensors(ctx context.Context, sensors ...*types.Sensor) error {
-	f, err := postgresDMLAssets.ReadFile(insertOrUpdateSensorSQLFile)
-	if err != nil {
-		return fmt.Errorf("Failed to read file %v: %w", insertOrUpdateSensorSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
 	if err != nil {
 		return fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	stmt, err := tx.Prepare(string(f))
+	stmt, err := tx.Prepare(insertOrUpdateSensorSQL)
 	if err != nil {
 		return fmt.Errorf("Failed to prepare statement: %v", err)
 	}
@@ -456,7 +470,7 @@ func (postgres *Postgres) Close() error {
 
 // Migrate creates all required tables if not exist
 func (postgres *Postgres) Migrate(ctx context.Context) error {
-	sourceDriver, err := iofs.New(postgresDDLAssets, postgresDDLAssetPath)
+	sourceDriver, err := iofs.New(postgresDDLAssets, "ddl")
 	if err != nil {
 		return err
 	}
@@ -477,18 +491,13 @@ func (postgres *Postgres) Migrate(ctx context.Context) error {
 
 // GetDevice from database
 func (postgres *Postgres) GetDeviceByID(ctx context.Context, id string) (*types.Device, error) {
-	f, err := postgresDMLAssets.ReadFile(selectDeviceByIDSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectDeviceByIDSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	devices, err := postgres.selectDevices(tx, string(f), id)
+	devices, err := postgres.selectDevices(tx, selectDeviceByIDSQL, id)
 	if err != nil {
 		return nil, err
 	}
@@ -507,18 +516,13 @@ func (postgres *Postgres) GetDeviceByID(ctx context.Context, id string) (*types.
 
 // GetDevice from database
 func (postgres *Postgres) GetDeviceByName(ctx context.Context, name string) (*types.Device, error) {
-	f, err := postgresDMLAssets.ReadFile(selectDeviceByNameSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectDeviceByNameSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	devices, err := postgres.selectDevices(tx, string(f), name)
+	devices, err := postgres.selectDevices(tx, selectDeviceByNameSQL, name)
 	if err != nil {
 		return nil, err
 	}
@@ -537,18 +541,13 @@ func (postgres *Postgres) GetDeviceByName(ctx context.Context, name string) (*ty
 
 // GetDevices from the database
 func (postgres *Postgres) GetDevices(ctx context.Context) ([]*types.Device, error) {
-	f, err := postgresDMLAssets.ReadFile(selectDevicesSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectDevicesSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	devices, err := postgres.selectDevices(tx, string(f))
+	devices, err := postgres.selectDevices(tx, selectDevicesSQL)
 	if err != nil {
 		return nil, err
 	}
@@ -594,18 +593,13 @@ func (postgres *Postgres) selectDevices(tx *sql.Tx, query string, args ...interf
 
 // GetHumidity returns humidity from the database
 func (postgres *Postgres) GetHumidityByID(ctx context.Context, id string) (*types.MeasuredValue, error) {
-	f, err := postgresDMLAssets.ReadFile(selectHumidityByIDSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectHumidityByIDSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, err
 	}
 	defer tx.Rollback()
 
-	measuredValues, err := postgres.selectMeasuredValue(tx, string(f), id)
+	measuredValues, err := postgres.selectMeasuredValue(tx, selectHumidityByIDSQL, id)
 	if err != nil {
 		return nil, err
 	}
@@ -628,18 +622,13 @@ func (postgres *Postgres) GetHumidityByID(ctx context.Context, id string) (*type
 
 // GetHumidities returns humidities from the database
 func (postgres *Postgres) GetHumidities(ctx context.Context) ([]*types.MeasuredValue, error) {
-	f, err := postgresDMLAssets.ReadFile(selectHumiditiesSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectHumiditiesSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, err
 	}
 	defer tx.Rollback()
 
-	measuredValues, err := postgres.selectMeasuredValue(tx, string(f))
+	measuredValues, err := postgres.selectMeasuredValue(tx, selectHumiditiesSQL)
 	if err != nil {
 		return nil, err
 	}
@@ -692,18 +681,13 @@ func (postgres *Postgres) selectMeasuredValue(tx *sql.Tx, query string, args ...
 
 // GetPressure returns pressure from the database
 func (postgres *Postgres) GetPressureByID(ctx context.Context, id string) (*types.MeasuredValue, error) {
-	f, err := postgresDMLAssets.ReadFile(selectPressureByIDSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectPressureByIDSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, err
 	}
 	defer tx.Rollback()
 
-	measuredValues, err := postgres.selectMeasuredValue(tx, string(f), id)
+	measuredValues, err := postgres.selectMeasuredValue(tx, selectPressureByIDSQL, id)
 	if err != nil {
 		return nil, err
 	}
@@ -726,18 +710,13 @@ func (postgres *Postgres) GetPressureByID(ctx context.Context, id string) (*type
 
 // GetPressures returns pressure from the database
 func (postgres *Postgres) GetPressures(ctx context.Context) ([]*types.MeasuredValue, error) {
-	f, err := postgresDMLAssets.ReadFile(selectPressuresSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectPressuresSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, err
 	}
 	defer tx.Rollback()
 
-	measuredValues, err := postgres.selectMeasuredValue(tx, string(f))
+	measuredValues, err := postgres.selectMeasuredValue(tx, selectPressuresSQL)
 	if err != nil {
 		return nil, err
 	}
@@ -756,18 +735,13 @@ func (postgres *Postgres) GetPressures(ctx context.Context) ([]*types.MeasuredVa
 
 // GetSensor from database
 func (postgres *Postgres) GetSensorByID(ctx context.Context, id string) (*types.Sensor, error) {
-	f, err := postgresDMLAssets.ReadFile(selectSensorByIDSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectSensorByIDSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	sensors, err := postgres.selectSensors(tx, string(f), id)
+	sensors, err := postgres.selectSensors(tx, selectSensorByIDSQL, id)
 	if err != nil {
 		return nil, err
 	}
@@ -786,18 +760,13 @@ func (postgres *Postgres) GetSensorByID(ctx context.Context, id string) (*types.
 
 // GetSensors from the database
 func (postgres *Postgres) GetSensors(ctx context.Context) ([]*types.Sensor, error) {
-	f, err := postgresDMLAssets.ReadFile(selectSensorsSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectSensorsSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	sensors, err := postgres.selectSensors(tx, string(f))
+	sensors, err := postgres.selectSensors(tx, selectSensorsSQL)
 	if err != nil {
 		return nil, err
 	}
@@ -812,11 +781,6 @@ func (postgres *Postgres) GetSensors(ctx context.Context) ([]*types.Sensor, erro
 
 // GetSensorsByModels from the database
 func (postgres *Postgres) GetSensorsByDeviceIDs(ctx context.Context, deviceIDs ...string) ([]*types.Sensor, error) {
-	f, err := postgresDMLAssets.ReadFile(selectSensorsByDeviceIDSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectSensorsByDeviceIDSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, fmt.Errorf("Failed to begin new transaction: %v", err)
@@ -825,7 +789,7 @@ func (postgres *Postgres) GetSensorsByDeviceIDs(ctx context.Context, deviceIDs .
 
 	cachedSensors := make([]*types.Sensor, 0)
 	for i := range deviceIDs {
-		sensors, err := postgres.selectSensors(tx, string(f), deviceIDs[i])
+		sensors, err := postgres.selectSensors(tx, selectSensorsByDeviceIDSQL, deviceIDs[i])
 		if err != nil {
 			return nil, err
 		}
@@ -843,11 +807,6 @@ func (postgres *Postgres) GetSensorsByDeviceIDs(ctx context.Context, deviceIDs .
 
 // GetSensorsByModel from the database
 func (postgres *Postgres) GetSensorsByModels(ctx context.Context, sensorModels ...string) ([]*types.Sensor, error) {
-	f, err := postgresDMLAssets.ReadFile(selectSensorsByModelSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectSensorsByModelSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, fmt.Errorf("Failed to begin new transaction: %v", err)
@@ -855,7 +814,7 @@ func (postgres *Postgres) GetSensorsByModels(ctx context.Context, sensorModels .
 
 	cachedSensors := make([]*types.Sensor, 0)
 	for i := range sensorModels {
-		sensors, err := postgres.selectSensors(tx, string(f), sensorModels[i])
+		sensors, err := postgres.selectSensors(tx, selectSensorsByModelSQL, sensorModels[i])
 		if err != nil {
 			return nil, err
 		}
@@ -873,11 +832,6 @@ func (postgres *Postgres) GetSensorsByModels(ctx context.Context, sensorModels .
 
 // GetSensorsByModel from the database
 func (postgres *Postgres) GetSensorsByNames(ctx context.Context, sensorNames ...string) ([]*types.Sensor, error) {
-	f, err := postgresDMLAssets.ReadFile(selectSensorsByNameSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectSensorsByNameSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, fmt.Errorf("Failed to begin new transaction: %v", err)
@@ -886,7 +840,7 @@ func (postgres *Postgres) GetSensorsByNames(ctx context.Context, sensorNames ...
 
 	cachedSensors := make([]*types.Sensor, 0)
 	for i := range sensorNames {
-		sensors, err := postgres.selectSensors(tx, string(f), sensorNames[i])
+		sensors, err := postgres.selectSensors(tx, selectSensorsByNameSQL, sensorNames[i])
 		if err != nil {
 			return nil, err
 		}
@@ -944,18 +898,13 @@ func (postgres *Postgres) selectSensors(tx *sql.Tx, query string, args ...interf
 
 // GetTemperature returns temperatures from the database
 func (postgres *Postgres) GetTemperatureByID(ctx context.Context, id string) (*types.MeasuredValue, error) {
-	f, err := postgresDMLAssets.ReadFile(selectTemperatureByIDSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectTemperatureByIDSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, err
 	}
 	defer tx.Rollback()
 
-	measuredValues, err := postgres.selectMeasuredValue(tx, string(f), id)
+	measuredValues, err := postgres.selectMeasuredValue(tx, selectTemperatureByIDSQL, id)
 	if err != nil {
 		return nil, err
 	}
@@ -978,18 +927,13 @@ func (postgres *Postgres) GetTemperatureByID(ctx context.Context, id string) (*t
 
 // GetTemperatures returns temperatures from the database
 func (postgres *Postgres) GetTemperatures(ctx context.Context) ([]*types.MeasuredValue, error) {
-	f, err := postgresDMLAssets.ReadFile(selectTemperaturesSQLFile)
-	if err != nil {
-		return nil, fmt.Errorf("Failed to read file %v: %w", selectTemperaturesSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: true})
 	if err != nil {
 		return nil, err
 	}
 	defer tx.Rollback()
 
-	measuredValues, err := postgres.selectMeasuredValue(tx, string(f))
+	measuredValues, err := postgres.selectMeasuredValue(tx, selectTemperaturesSQL)
 	if err != nil {
 		return nil, err
 	}
@@ -1008,18 +952,13 @@ func (postgres *Postgres) GetTemperatures(ctx context.Context) ([]*types.Measure
 
 // RemoveDevices from the database
 func (postgres *Postgres) RemoveDevicesByIDs(ctx context.Context, deviceIDs ...string) error {
-	f, err := postgresDMLAssets.ReadFile(deleteDeviceByIDSQLFile)
-	if err != nil {
-		return fmt.Errorf("Failed to read file %v: %w", deleteDeviceByIDSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
 	if err != nil {
 		return fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	stmt, err := tx.Prepare(string(f))
+	stmt, err := tx.Prepare(deleteDeviceByIDSQL)
 	if err != nil {
 		return fmt.Errorf("Failed to prepare statement: %v", err)
 	}
@@ -1037,18 +976,13 @@ func (postgres *Postgres) RemoveDevicesByIDs(ctx context.Context, deviceIDs ...s
 
 // RemoveDevices from the database
 func (postgres *Postgres) RemoveDevicesByNames(ctx context.Context, names ...string) error {
-	f, err := postgresDMLAssets.ReadFile(deleteDeviceByNameSQLFile)
-	if err != nil {
-		return fmt.Errorf("Failed to read file %v: %w", deleteDeviceByNameSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
 	if err != nil {
 		return fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	stmt, err := tx.Prepare(string(f))
+	stmt, err := tx.Prepare(deleteDeviceByNameSQL)
 	if err != nil {
 		return fmt.Errorf("Failed to prepare statement: %v", err)
 	}
@@ -1066,18 +1000,13 @@ func (postgres *Postgres) RemoveDevicesByNames(ctx context.Context, names ...str
 
 // RemoveSensors from the database
 func (postgres *Postgres) RemoveSensorsByIDs(ctx context.Context, sensorIDs ...string) error {
-	f, err := postgresDMLAssets.ReadFile(deleteSensorByIDSQLFile)
-	if err != nil {
-		return fmt.Errorf("Failed to read file %v: %w", deleteSensorByIDSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
 	if err != nil {
 		return fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	stmt, err := tx.Prepare(string(f))
+	stmt, err := tx.Prepare(deleteSensorByIDSQL)
 	if err != nil {
 		return fmt.Errorf("Failed to prepare statement: %v", err)
 	}
@@ -1095,18 +1024,13 @@ func (postgres *Postgres) RemoveSensorsByIDs(ctx context.Context, sensorIDs ...s
 
 // RemoveSensors from the database
 func (postgres *Postgres) RemoveSensorsByNames(ctx context.Context, sensorIDs ...string) error {
-	f, err := postgresDMLAssets.ReadFile(deleteSensorByNameSQLFile)
-	if err != nil {
-		return fmt.Errorf("Failed to read file %v: %w", deleteSensorByNameSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
 	if err != nil {
 		return fmt.Errorf("Failed to begin new transaction: %v", err)
 	}
 	defer tx.Rollback()
 
-	stmt, err := tx.Prepare(string(f))
+	stmt, err := tx.Prepare(deleteSensorByNameSQL)
 	if err != nil {
 		return fmt.Errorf("Failed to prepare statement: %v", err)
 	}
@@ -1124,18 +1048,13 @@ func (postgres *Postgres) RemoveSensorsByNames(ctx context.Context, sensorIDs ..
 
 // UpdateDevices updates a device in the database
 func (postgres *Postgres) UpdateDevices(ctx context.Context, devices ...*types.Device) error {
-	f, err := postgresDMLAssets.ReadFile(updateDeviceSQLFile)
-	if err != nil {
-		return fmt.Errorf("Failed to read file %v: %w", updateDeviceSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
 	if err != nil {
 		return err
 	}
 	defer tx.Rollback()
 
-	stmt, err := tx.Prepare(string(f))
+	stmt, err := tx.Prepare(updateDeviceSQL)
 	if err != nil {
 		return err
 	}
@@ -1162,18 +1081,13 @@ func (postgres *Postgres) UpdateDevices(ctx context.Context, devices ...*types.D
 
 // UpdateSensors updates a sensor in the database
 func (postgres *Postgres) UpdateSensors(ctx context.Context, sensors ...*types.Sensor) error {
-	f, err := postgresDMLAssets.ReadFile(updateSensorSQLFile)
-	if err != nil {
-		return fmt.Errorf("Failed to read file %v: %w", updateSensorSQLFile, err)
-	}
-
 	tx, err := postgres.dbo.BeginTx(ctx, &sql.TxOptions{ReadOnly: false})
 	if err != nil {
 		return err
 	}
 	defer tx.Rollback()
 
-	stmt, err := tx.Prepare(string(f))
+	stmt, err := tx.Prepare(updateSensorSQL)
 	if err != nil {
 		return err
 	}