feat: add backoff package for retry logic and implement example usage in new backoff-test script

.atl/skill-registry.md

@@ -1,24 +0,0 @@
-# Skill Registry — go-migrate
-
-Generated: 2026-04-21
-
-## Compact Rules
-
-### Go conventions
-- Use existing error wrapping pattern: `fmt.Errorf("context: %w", err)`
-- Channel-based pipeline — keep goroutine lifecycle clean (close channels in correct order)
-- No comments unless non-obvious WHY; no docstrings
-- Prefer named returns only when it aids clarity in short functions
-- Use `strings.EqualFold` for case-insensitive column name comparison
-
-### Project conventions
-- Config structs live in `internal/app/config/`
-- ETL interfaces live in `internal/app/etl/types.go`
-- Transformer implementations in `internal/app/etl/transformers/`
-- Azure operations via `internal/app/azure/main.go`
-- Per-job transformer creation (not shared) when job has storage config
-
-## User Skills
-| Trigger | Skill |
-|---------|-------|
-| sdd-* | SDD workflow skills |

.env.example

@@ -1,12 +1,2 @@
-SOURCE_DB_URL=sqlserver://sa:password@localhost:1433?database=master&packet+size=32767&loc=UTC
+PG_FROM_DB_URL=postgresql://postgres:password@localhost:5432/db
-TARGET_DB_URL=postgresql://postgres:password@localhost:5432/db
+PG_TO_DB_URL=postgresql://postgres:password@localhost:5432/db
-
-LOG_LEVEL=INFO
-
-AZ_STORAGE_ENABLED=false
-AZ_ACCOUNT_NAME=
-AZ_CONTAINER=
-AZ_ACCOUNT_KEY=
-AZ_USE_HTTPS=true
-AZ_SERVICE_URL=
-AZ_PREFIX=

.gitignore

@@ -4,7 +4,6 @@
 *.dll
 *.so
 *.dylib
-bin/
 
 # Test binary, built with `go test -c`
 *.test
@@ -27,5 +26,5 @@ go.work.sum
 
 # Editor/IDE
 # .idea/
-.vscode/
+# .vscode/
 .temp

Makefile

@@ -1,80 +0,0 @@
-.PHONY: build build-linux build-windows build-all clean help
-
-# Variables
-BINARY_NAME=go-migrate
-CMD_PATH=./cmd/go_migrate
-OUTPUT_DIR=bin
-VERSION?=$(shell git describe --tags --always --dirty 2>/dev/null || echo "dev")
-BUILD_TIME=$(shell date -u '+%Y-%m-%d_%H:%M:%S')
-GIT_COMMIT=$(shell git rev-parse --short HEAD 2>/dev/null || echo "unknown")
-
-# Flags de compilación
-LD_FLAGS=-ldflags="-s -w -X main.Version=$(VERSION) -X main.BuildTime=$(BUILD_TIME) -X main.GitCommit=$(GIT_COMMIT)"
-
-# Default: compilar para el SO actual
-build: build-$(OS)
-
-ifeq ($(OS),Windows_NT)
-build-native: build-windows
-else
-build-native: build-linux
-endif
-
-# Compilar para Linux (sin CGO para máxima compatibilidad)
-build-linux:
-	@echo "Compilando para Linux..."
-	@mkdir -p $(OUTPUT_DIR)
-	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
-		$(LD_FLAGS) \
-		-o $(OUTPUT_DIR)/$(BINARY_NAME)-linux-amd64 \
-		$(CMD_PATH)
-	@echo "Binario creado: $(OUTPUT_DIR)/$(BINARY_NAME)-linux-amd64"
-
-# Compilar para Windows
-build-windows:
-	@echo "Compilando para Windows..."
-	@mkdir -p $(OUTPUT_DIR)
-	CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build \
-		$(LD_FLAGS) \
-		-o $(OUTPUT_DIR)/$(BINARY_NAME)-windows-amd64.exe \
-		$(CMD_PATH)
-	@echo "Binario creado: $(OUTPUT_DIR)/$(BINARY_NAME)-windows-amd64.exe"
-
-# Compilar para ambas plataformas
-build-all: build-linux build-windows
-	@echo ""
-	@echo "Binarios compilados:"
-	@ls -lh $(OUTPUT_DIR)/$(BINARY_NAME)*
-
-# Compilar para Linux arm64 (opcional, para Raspberry Pi, etc.)
-build-linux-arm64:
-	@echo "Compilando para Linux ARM64..."
-	@mkdir -p $(OUTPUT_DIR)
-	CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build \
-		$(LD_FLAGS) \
-		-o $(OUTPUT_DIR)/$(BINARY_NAME)-linux-arm64 \
-		$(CMD_PATH)
-	@echo "Binario creado: $(OUTPUT_DIR)/$(BINARY_NAME)-linux-arm64"
-
-# Limpiar binarios
-clean:
-	@echo "Limpiando binarios..."
-	@rm -rf $(OUTPUT_DIR)
-	@echo "Limpieza completada"
-
-# Ayuda
-help:
-	@echo "Comandos disponibles:"
-	@echo ""
-	@echo "  make build              - Compilar para el SO actual (Linux/Windows)"
-	@echo "  make build-linux        - Compilar para Linux x86_64"
-	@echo "  make build-windows      - Compilar para Windows x86_64"
-	@echo "  make build-linux-arm64  - Compilar para Linux ARM64 (opcional)"
-	@echo "  make build-all          - Compilar para Linux y Windows"
-	@echo "  make clean              - Eliminar binarios compilados"
-	@echo "  make help               - Mostrar esta ayuda"
-	@echo ""
-	@echo "Ejemplos de uso:"
-	@echo "  make build-all          # Crear binarios para ambas plataformas"
-	@echo "  make build-linux OS=    # Crear solo para Linux"
-	@echo ""

cmd/go_migrate/connect.go

@@ -0,0 +1,77 @@
+package main
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+	"sync"
+	"time"
+
+	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
+	"github.com/jackc/pgx/v5/pgxpool"
+	_ "github.com/microsoft/go-mssqldb"
+	log "github.com/sirupsen/logrus"
+)
+
+func connectToSqlServer() (*sql.DB, error) {
+	db, err := sql.Open("sqlserver", config.App.SourceDbUrl)
+	if err != nil {
+		return nil, fmt.Errorf("Unable to connect to sqlserver: %w", err)
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
+	defer cancel()
+
+	if err := db.PingContext(ctx); err != nil {
+		return nil, fmt.Errorf("Unable to ping sqlserver: %w", err)
+	}
+
+	return db, nil
+}
+
+func connectToPostgres() (*pgxpool.Pool, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
+	defer cancel()
+
+	pool, err := pgxpool.New(ctx, config.App.TargetDbUrl)
+	if err != nil {
+		return nil, fmt.Errorf("Unable to connect to postgres: %w", err)
+	}
+
+	if err := pool.Ping(ctx); err != nil {
+		pool.Close()
+		return nil, fmt.Errorf("Unable to ping postgres: %w", err)
+	}
+
+	return pool, nil
+}
+
+func connectToDatabases() (*sql.DB, *pgxpool.Pool, error) {
+	var sourceDbErr, targetDbErr error
+	var sourceDb *sql.DB
+	var targetDb *pgxpool.Pool
+	var wg sync.WaitGroup
+
+	wg.Go(func() {
+		sourceDb, sourceDbErr = connectToSqlServer()
+		if sourceDbErr != nil {
+			log.Error("Unable to connect to source db: ", sourceDbErr)
+		}
+	})
+
+	wg.Go(func() {
+		targetDb, targetDbErr = connectToPostgres()
+		if targetDbErr != nil {
+			log.Error("Unable to connect to target db: ", targetDbErr)
+		}
+	})
+
+	wg.Wait()
+
+	if sourceDbErr != nil || targetDbErr != nil {
+		return nil, nil, errors.New("Unable to connect to databases")
+	}
+
+	return sourceDb, targetDb, nil
+}

cmd/go_migrate/log.go

@@ -3,7 +3,6 @@ package main
 import (
 	"time"
 
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
 	log "github.com/sirupsen/logrus"
 )
 
@@ -14,13 +13,5 @@ func configureLog() {
 		DisableSorting:  false,
 		PadLevelText:    true,
 	})
-
+	log.SetLevel(log.DebugLevel)
-	logLevelEnv := config.App.LogLevel
-	logLevel, err := log.ParseLevel(logLevelEnv)
-	if err != nil {
-		log.Warnf("Nivel de log inválido '%s', usando INFO por defecto", logLevelEnv)
-		logLevel = log.InfoLevel
-	}
-
-	log.SetLevel(logLevel)
 }

cmd/go_migrate/main.go

@@ -2,18 +2,18 @@ package main
 
 import (
 	"context"
+	"database/sql"
 	"sync"
 	"time"
 
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/azure"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
-	dbwrapper "git.ksdemosapps.com/kylesoda/go-migrate/internal/app/db-wrapper"
+	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/db"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl/extractors"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl/loaders"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl/table_analyzers"
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
+	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl/transformers"
+	"github.com/jackc/pgx/v5/pgxpool"
 	log "github.com/sirupsen/logrus"
-	"golang.org/x/sync/errgroup"
 )
 
 func main() {
@@ -24,7 +24,7 @@ func main() {
 		log.Fatalf("error leyendo configuracion: %v", err)
 	}
 
-	// log.Debugf("Config: %+v", migrationConfig)
+	log.Debugf("Config: %+v", migrationConfig)
 
 	startTime := time.Now()
 
@@ -33,33 +33,11 @@ func main() {
 
 	log.Info("=== Starting migration ===")
 
-	var wgConnect errgroup.Group
+	sourceDb, targetDb, connError := connectToDatabases()
-	var sourceDb, targetDb dbwrapper.DbWrapper
+	if connError != nil {
-
+		log.Fatal("Connection error: ", connError)
-	wgConnect.Go(func() error {
-		var err error
-		sourceDb, err = connectWithTimeout(ctx, migrationConfig.SourceDbType, config.App.SourceDbUrl, 20*time.Second)
-		if err != nil {
-			return err
 	}
 
-		return nil
-	})
-
-	wgConnect.Go(func() error {
-		var err error
-		targetDb, err = connectWithTimeout(ctx, migrationConfig.TargetDbType, config.App.TargetDbUrl, 20*time.Second)
-		if err != nil {
-			return err
-		}
-
-		return nil
-	})
-
-	if err := wgConnect.Wait(); err != nil {
-		log.Error("Connection error: ", err)
-		return
-	}
 	defer sourceDb.Close()
 	defer targetDb.Close()
 
@@ -92,14 +70,14 @@ func main() {
 
 func processMigrationJobs(
 	ctx context.Context,
-	sourceDb dbwrapper.DbWrapper,
+	sourceDb *sql.DB,
-	targetDb dbwrapper.DbWrapper,
+	targetDb *pgxpool.Pool,
 	jobs []config.Job,
 	maxParallelWorkers int,
-) []models.JobResult {
+) []JobResult {
 	if len(jobs) == 0 {
 		log.Info("No migration jobs configured")
-		return []models.JobResult{}
+		return []JobResult{}
 	}
 
 	if maxParallelWorkers <= 0 {
@@ -112,23 +90,16 @@ func processMigrationJobs(
 
 	log.Infof("Starting migration with %d parallel worker(s)", maxParallelWorkers)
 
-	chJobResults := make(chan models.JobResult, len(jobs))
+	chJobResults := make(chan JobResult, len(jobs))
 	chJobs := make(chan config.Job, len(jobs))
 	var wgJobs sync.WaitGroup
 
+	targetDbWrapper := db.NewPostgresDbWrapper(targetDb)
 	sourceTableAnalyzer := table_analyzers.NewMssqlTableAnalyzer(sourceDb)
 	targetTableAnalyzer := table_analyzers.NewPostgresTableAnalyzer(targetDb)
 	extractor := extractors.NewMssqlExtractor(sourceDb)
-	loader := loaders.NewGenericLoader(targetDb)
+	transformer := transformers.NewMssqlTransformer()
-
+	loader := loaders.NewPostgresLoader(targetDb)
-	var azureClient *azure.Client
-	if config.App.AzureStorage.Enabled {
-		var err error
-		azureClient, err = azure.NewClient(config.App.AzureStorage)
-		if err != nil {
-			log.Fatalf("Failed to create Azure storage client: %v", err)
-		}
-	}
 
 	for i := range maxParallelWorkers {
 		wgJobs.Go(func() {
@@ -136,14 +107,13 @@ func processMigrationJobs(
 				log.Infof("[worker %d] >>> Processing job: %s.%s <<<", i, job.SourceTable.Schema, job.SourceTable.Table)
 				res := processMigrationJob(
 					ctx,
-					targetDb,
+					targetDbWrapper,
 					sourceTableAnalyzer,
 					targetTableAnalyzer,
 					extractor,
-					azureClient,
+					transformer,
 					loader,
 					job,
-					targetDb.GetDialect(),
 				)
 
 				chJobResults <- res
@@ -161,26 +131,10 @@ func processMigrationJobs(
 		close(chJobResults)
 	}()
 
-	var finalResults []models.JobResult
+	var finalResults []JobResult
 	for res := range chJobResults {
 		finalResults = append(finalResults, res)
 	}
 
 	return finalResults
 }
-
-func connectWithTimeout(ctx context.Context, dbType string, dbUrl string, timeout time.Duration) (dbwrapper.DbWrapper, error) {
-	localCtx, cancel := context.WithTimeout(ctx, timeout)
-	defer cancel()
-
-	sourceDb, err := dbwrapper.New(dbType)
-	if err != nil {
-		return nil, err
-	}
-
-	if err = sourceDb.Connect(localCtx, dbUrl); err != nil {
-		return nil, err
-	}
-
-	return sourceDb, nil
-}

cmd/go_migrate/metrics.go

@@ -0,0 +1,13 @@
+package main
+
+import "time"
+
+type JobResult struct {
+	JobName    string
+	StartTime  time.Time
+	Duration   time.Duration
+	RowsRead   int64
+	RowsLoaded int64
+	RowsFailed int64
+	Error      error
+}

cmd/go_migrate/process.go

@@ -2,54 +2,35 @@ package main
 
 import (
 	"context"
-	"fmt"
 	"sync"
 	"sync/atomic"
 	"time"
 
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/azure"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/custom_errors"
-	dbwrapper "git.ksdemosapps.com/kylesoda/go-migrate/internal/app/db-wrapper"
+	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/db"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl"
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl/extractors"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl/table_analyzers"
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl/transformers"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/sync/errgroup"
 )
 
-func buildTruncateQuery(targetDbType, schema, table, truncateMethod string) string {
-	if truncateMethod == "DELETE" {
-		if targetDbType == "postgres" {
-			return fmt.Sprintf(`DELETE FROM "%s"."%s"`, schema, table)
-		}
-		return fmt.Sprintf(`DELETE FROM [%s].[%s]`, schema, table)
-	}
-
-	if targetDbType == "postgres" {
-		return fmt.Sprintf(`TRUNCATE TABLE "%s"."%s"`, schema, table)
-	}
-	return fmt.Sprintf(`TRUNCATE TABLE [%s].[%s]`, schema, table)
-}
-
 func processMigrationJob(
 	ctx context.Context,
-	targetDbWrapper dbwrapper.DbWrapper,
+	// sourceDbWrapper db.DbWrapper,
+	targetDbWrapper db.DbWrapper,
 	sourceTableAnalyzer etl.TableAnalyzer,
 	targetTableAnalyzer etl.TableAnalyzer,
 	extractor etl.Extractor,
-	azureClient *azure.Client,
+	transformer etl.Transformer,
 	loader etl.Loader,
 	job config.Job,
-	targetDbType string,
+) JobResult {
-) models.JobResult {
-	transformer := transformers.NewMssqlTransformer(job.ToStorage, job.SourceTable, azureClient)
 	localCtx, cancel := context.WithCancel(ctx)
 	defer cancel()
 
-	result := models.JobResult{
+	result := JobResult{
 		JobName:   job.Name,
 		StartTime: time.Now(),
 	}
@@ -85,13 +66,7 @@ func processMigrationJob(
 		return result
 	}
 
-	preSqlQueries := job.TargetTable.PreSQL
+	for _, query := range job.PreSQL {
-	if job.TruncateTarget {
-		truncateQuery := buildTruncateQuery(targetDbType, job.TargetTable.Schema, job.TargetTable.Table, job.TruncateMethod)
-		preSqlQueries = append([]string{truncateQuery}, job.TargetTable.PreSQL...)
-	}
-
-	for _, query := range preSqlQueries {
 		if _, err := targetDbWrapper.Exec(localCtx, query); err != nil {
 			result.Error = err
 			return result
@@ -104,7 +79,6 @@ func processMigrationJob(
 		job.SourceTable.TableInfo,
 		job.SourceTable.PrimaryKey,
 		job.RowsPerPartition,
-		job.Range,
 	)
 	if err != nil {
 		log.Error("Unexpected error calculating batch ranges: ", err)
@@ -155,9 +129,8 @@ func processMigrationJob(
 
 	for range maxExtractors {
 		wgExtractors.Go(func() {
-			extractors.Consume(
+			extractor.Exec(
 				localCtx,
-				extractor,
 				job.SourceTable,
 				sourceColTypes,
 				job.BatchSize,
@@ -241,7 +214,7 @@ func processMigrationJob(
 		cancel()
 	}()
 
-	for _, query := range job.TargetTable.PostSQL {
+	for _, query := range job.PostSQL {
 		if _, err := targetDbWrapper.Exec(localCtx, query); err != nil {
 			result.Error = err
 			return result
@@ -261,9 +234,5 @@ func processMigrationJob(
 	result.RowsLoaded = atomic.LoadInt64(&rowsLoaded)
 	result.RowsFailed = atomic.LoadInt64(&rowsFailed)
 
-	if result.RowsRead != result.RowsLoaded {
-		result.Error = fmt.Errorf("Row count mismatch: extracted %d rows but loaded %d rows (failed: %d)", result.RowsRead, result.RowsLoaded, result.RowsFailed)
-	}
-
 	return result
 }

config.yaml

@@ -30,11 +30,6 @@ jobs:
       table: MANZANA
     pre_sql: 
       - 'SELECT 1'
-    range:
-      min: 1000000
-      max: 2000000
-      is_min_inclusive: false
-      is_max_inclusive: true
 
   - name: red_puerto
     enabled: true
@@ -49,26 +44,3 @@ jobs:
       - 'SELECT 1'
     post_sql: 
       - "SELECT 1"
-
-  - name: infraestructura_site_holder__attach
-    source:
-      schema: Infraestructura
-      table: SITE_HOLDER__ATTACH
-      primary_key: GDB_ARCHIVE_OID
-    target:
-      schema: Infraestructura
-      table: SITE_HOLDER__ATTACH
-    to_storage:
-      columns:
-        - source: DATA
-          target: FILE_URL
-          mode: REFERENCE_ONLY
-    max_extractors: 8
-    max_loaders: 4
-    queue_size: 32
-    batch_size: 1
-    retry:
-      attempts: 5
-      base_delay_ms: 1000
-      max_delay_ms: 15000
-      max_jitter_ms: 500

go.mod

@@ -1,13 +1,12 @@
 module git.ksdemosapps.com/kylesoda/go-migrate
 
-go 1.26
+go 1.25.7
 
 require (
-	github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.4
 	github.com/gaspardle/go-mssqlclrgeo v0.0.0-20160129143314-97ceabf987a4
 	github.com/google/uuid v1.6.0
-	github.com/ilyakaznacheev/cleanenv v1.5.0
 	github.com/jackc/pgx/v5 v5.9.1
+	github.com/joho/godotenv v1.5.1
 	github.com/microsoft/go-mssqldb v1.9.8
 	github.com/sirupsen/logrus v1.9.4
 	github.com/twpayne/go-geom v1.6.1
@@ -16,20 +15,17 @@ require (
 )
 
 require (
-	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.21.0 // indirect
+	github.com/cenkalti/backoff v2.2.1+incompatible // indirect
-	github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.2 // indirect
+	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
-	github.com/BurntSushi/toml v1.6.0 // indirect
 	github.com/golang-sql/civil v0.0.0-20220223132316-b832511892a9 // indirect
 	github.com/golang-sql/sqlexp v0.1.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
-	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/kr/text v0.2.0 // indirect
 	github.com/rogpeppe/go-internal v1.14.1 // indirect
 	github.com/shopspring/decimal v1.4.0 // indirect
 	golang.org/x/crypto v0.48.0 // indirect
-	golang.org/x/net v0.51.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3 // indirect
 )

go.sum

@@ -4,25 +4,23 @@ github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.13.1 h1:Hk5QBxZQC1jb2Fwj6mpz
 github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.13.1/go.mod h1:IYus9qsFobWIc2YVwe/WPjcnyCkPKtnHAqUYeebc8z0=
 github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.2 h1:9iefClla7iYpfYWdzPCRDozdmndjTm8DXdpCzPajMgA=
 github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.2/go.mod h1:XtLgD3ZD34DAaVIIAyG3objl5DynM3CQ/vMcbBNJZGI=
-github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/storage/armstorage v1.8.1 h1:/Zt+cDPnpC3OVDm/JKLOs7M2DKmLRIIp3XIx9pHHiig=
-github.com/Azure/azure-sdk-for-go/sdk/resourcemanager/storage/armstorage v1.8.1/go.mod h1:Ng3urmn6dYe8gnbCMoHHVl5APYz2txho3koEkV2o2HA=
 github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/azkeys v1.4.0 h1:E4MgwLBGeVB5f2MdcIVD3ELVAWpr+WD6MUe1i+tM/PA=
 github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/azkeys v1.4.0/go.mod h1:Y2b/1clN4zsAoUd/pgNAQHjLDnTis/6ROkUfyob6psM=
 github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/internal v1.2.0 h1:nCYfgcSyHZXJI8J0IWE5MsCGlb2xp9fJiXyxWgmOFg4=
 github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/internal v1.2.0/go.mod h1:ucUjca2JtSZboY8IoUqyQyuuXvwbMBVwFOm0vdQPNhA=
-github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.4 h1:jWQK1GI+LeGGUKBADtcH2rRqPxYB1Ljwms5gFA2LqrM=
-github.com/Azure/azure-sdk-for-go/sdk/storage/azblob v1.6.4/go.mod h1:8mwH4klAm9DUgR2EEHyEEAQlRDvLPyg5fQry3y+cDew=
 github.com/AzureAD/microsoft-authentication-library-for-go v1.6.0 h1:XRzhVemXdgvJqCH0sFfrBUTnUJSBrBf7++ypk+twtRs=
 github.com/AzureAD/microsoft-authentication-library-for-go v1.6.0/go.mod h1:HKpQxkWaGLJ+D/5H8QRpyQXA1eKjxkFlOMwck5+33Jk=
-github.com/BurntSushi/toml v1.2.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
-github.com/BurntSushi/toml v1.6.0 h1:dRaEfpa2VI55EwlIW72hMRHdWouJeRF7TPYhI+AUQjk=
-github.com/BurntSushi/toml v1.6.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
 github.com/DATA-DOG/go-sqlmock v1.5.2 h1:OcvFkGmslmlZibjAjaHm3L//6LiuBgolP7OputlJIzU=
 github.com/DATA-DOG/go-sqlmock v1.5.2/go.mod h1:88MAG/4G7SMwSE3CeA0ZKzrT5CiOU3OJ+JlNzwDqpNU=
 github.com/alecthomas/assert/v2 v2.10.0 h1:jjRCHsj6hBJhkmhznrCzoNpbA3zqy0fYiUcYZP/GkPY=
 github.com/alecthomas/assert/v2 v2.10.0/go.mod h1:Bze95FyfUr7x34QZrjL+XP+0qgp/zg8yS+TtBj1WA3k=
 github.com/alecthomas/repr v0.4.0 h1:GhI2A8MACjfegCPVq9f1FLvIBS+DrQ2KQBFZP1iFzXc=
 github.com/alecthomas/repr v0.4.0/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
+github.com/cenkalti/backoff v2.2.1+incompatible h1:tNowT99t7UNflLxfYYSlKYsBpXdEet03Pg2g16Swow4=
+github.com/cenkalti/backoff v2.2.1+incompatible/go.mod h1:90ReRw6GdpyfrHakVjL/QHaoyV4aDUVVkXQJJJ3NXXM=
+github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
+github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -38,8 +36,6 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/hexops/gotextdiff v1.0.3 h1:gitA9+qJrrTCsiCl7+kh75nPqQt1cx4ZkudSTLoUqJM=
 github.com/hexops/gotextdiff v1.0.3/go.mod h1:pSWU5MAI3yDq+fZBTazCSJysOMbxWL1BSow5/V2vxeg=
-github.com/ilyakaznacheev/cleanenv v1.5.0 h1:0VNZXggJE2OYdXE87bfSSwGxeiGt9moSR2lOrsHHvr4=
-github.com/ilyakaznacheev/cleanenv v1.5.0/go.mod h1:a5aDzaJrLCQZsazHol1w8InnDcOX0OColm64SlIi6gk=
 github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
 github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
 github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=
@@ -50,8 +46,8 @@ github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo
 github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
 github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
 github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
-github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
-github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
+github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
@@ -91,5 +87,3 @@ gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EV
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3 h1:slmdOY3vp8a7KQbHkL+FLbvbkgMqmXojpFUO/jENuqQ=
-olympos.io/encoding/edn v0.0.0-20201019073823-d3554ca0b0a3/go.mod h1:oVgVk4OWVDi43qWBEyGhXgYxt7+ED4iYNpTngSLX2Iw=

internal/app/azure/main.go

@@ -1,87 +0,0 @@
-package azure
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"net/url"
-
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
-	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob"
-)
-
-var (
-	ErrInvalidConnectionString = errors.New("invalid connection string")
-	ErrContainerNotFound       = errors.New("container not found")
-	ErrBlobNotFound            = errors.New("blob not found")
-	ErrInvalidInput            = errors.New("invalid input parameters")
-)
-
-type Client struct {
-	client             *azblob.Client
-	azureStorageConfig config.AzureStorageConfig
-}
-
-func NewClient(azureStorageConfig config.AzureStorageConfig) (*Client, error) {
-	protocol := "https"
-	if !azureStorageConfig.UseHTTPS {
-		protocol = "http"
-	}
-
-	blobEndpoint, _ := url.JoinPath(azureStorageConfig.ServiceURL, azureStorageConfig.AccountName)
-	connStr := fmt.Sprintf("DefaultEndpointsProtocol=%s;AccountName=%s;AccountKey=%s;BlobEndpoint=%s;",
-		protocol, azureStorageConfig.AccountName, azureStorageConfig.AccountKey, blobEndpoint)
-
-	client, err := azblob.NewClientFromConnectionString(connStr, nil)
-	if err != nil {
-		return nil, fmt.Errorf("creating azure storage client: %w", err)
-	}
-
-	return &Client{
-		client:             client,
-		azureStorageConfig: azureStorageConfig,
-	}, nil
-}
-
-func (c *Client) CreateContainer(ctx context.Context, containerName string) error {
-	if containerName == "" {
-		return ErrInvalidInput
-	}
-
-	_, err := c.client.CreateContainer(ctx, containerName, nil)
-	if err != nil {
-		return fmt.Errorf("creating container %s: %w", containerName, err)
-	}
-	return nil
-}
-
-func (c *Client) UploadBuffer(ctx context.Context, containerName, blobPath string, buffer []byte) error {
-	if containerName == "" || blobPath == "" || buffer == nil {
-		return ErrInvalidInput
-	}
-
-	_, err := c.client.UploadBuffer(ctx, containerName, blobPath, buffer, nil)
-	if err != nil {
-		return fmt.Errorf("uploading blob %s: %w", blobPath, err)
-	}
-	return nil
-}
-
-func (c *Client) UploadAndGetURL(ctx context.Context, blobPath string, buffer []byte) (string, error) {
-	if blobPath == "" || buffer == nil {
-		return "", ErrInvalidInput
-	}
-
-	fullPath := blobPath
-	if c.azureStorageConfig.Prefix != "" {
-		fullPath, _ = url.JoinPath(c.azureStorageConfig.Prefix, blobPath)
-	}
-
-	if err := c.UploadBuffer(ctx, c.azureStorageConfig.Container, fullPath, buffer); err != nil {
-		return "", err
-	}
-
-	blobEndpoint, _ := url.JoinPath(c.azureStorageConfig.ServiceURL, c.azureStorageConfig.AccountName)
-	blobURL, _ := url.JoinPath(blobEndpoint, c.azureStorageConfig.Container, fullPath)
-	return blobURL, nil
-}

internal/app/config/main.go

@@ -1,41 +1,41 @@
 package config
 
 import (
-	"github.com/ilyakaznacheev/cleanenv"
+	"os"
+
+	"github.com/joho/godotenv"
 	log "github.com/sirupsen/logrus"
 )
 
-type AzureStorageConfig struct {
+type appConfig struct {
-	AccountName string `env:"AZ_ACCOUNT_NAME"`
+	SourceDbUrl string
-	Container   string `env:"AZ_CONTAINER"`
+	TargetDbUrl string
-	AccountKey  string `env:"AZ_ACCOUNT_KEY"`
-	UseHTTPS    bool   `env:"AZ_USE_HTTPS" env-default:"true"`
-	ServiceURL  string `env:"AZ_SERVICE_URL"`
-	Prefix      string `env:"AZ_PREFIX"`
-	Enabled     bool   `env:"AZ_STORAGE_ENABLED"`
 }
 
-type appConfig struct {
+func loadEnv() {
-	SourceDbUrl  string `env:"SOURCE_DB_URL" env-required:"true"`
+	err := godotenv.Load()
-	TargetDbUrl  string `env:"TARGET_DB_URL" env-required:"true"`
+	if err != nil {
-	LogLevel     string `env:"LOG_LEVEL" env-default:"INFO"`
+		log.Warn("Warning: could not load .env file")
-	AzureStorage AzureStorageConfig
+	}
 }
 
 func getAppConfig() appConfig {
-	var cfg appConfig
+	loadEnv()
 
-	err := cleanenv.ReadConfig(".env", &cfg)
+	sourceDbUrl := os.Getenv("SOURCE_DB_URL")
-	if err != nil {
+	if sourceDbUrl == "" {
-		log.Warn("Could not load .env file")
+		log.Fatal("SOURCE_DB_URL environment variable not set")
 	}
 
-	err = cleanenv.ReadEnv(&cfg)
+	targetDbUrl := os.Getenv("TARGET_DB_URL")
-	if err != nil {
+	if targetDbUrl == "" {
-		log.Fatalf("Error al cargar variables: %v", err)
+		log.Fatal("TARGET_DB_URL environment variable not set")
 	}
 
-	return cfg
+	return appConfig{
+		SourceDbUrl: sourceDbUrl,
+		TargetDbUrl: targetDbUrl,
+	}
 }
 
 var App appConfig = getAppConfig()

internal/app/config/migration.go

@@ -14,16 +14,6 @@ type RetryConfig struct {
 	MaxJitterMs int `yaml:"max_jitter_ms"`
 }
 
-type ToStorageColumnConfig struct {
-	Source string `yaml:"source"`
-	Target string `yaml:"target"`
-	Mode   string `yaml:"mode"`
-}
-
-type ToStorageConfig struct {
-	Columns []ToStorageColumnConfig `yaml:"columns"`
-}
-
 type JobConfig struct {
 	MaxExtractors       int         `yaml:"max_extractors"`
 	MaxLoaders          int         `yaml:"max_loaders"`
@@ -36,7 +26,6 @@ type JobConfig struct {
 	MaxChunkErrors      int         `yaml:"max_chunk_errors"`
 	Retry               RetryConfig `yaml:"retry"`
 	RowsPerPartition    int64
-	ToStorage           ToStorageConfig `yaml:"to_storage"`
 }
 
 type TableInfo struct {
@@ -44,31 +33,23 @@ type TableInfo struct {
 	Table  string `yaml:"table"`
 }
 
+type TargetTableInfo struct {
+	TableInfo `yaml:",inline"`
+}
+
 type SourceTableInfo struct {
 	TableInfo  `yaml:",inline"`
 	PrimaryKey string `yaml:"primary_key"`
 }
 
-type TargetTableInfo struct {
-	TableInfo `yaml:",inline"`
-	PreSQL    []string `yaml:"pre_sql"`
-	PostSQL   []string `yaml:"post_sql"`
-}
-
-type RangeConfig struct {
-	Min            int64 `yaml:"min"`
-	Max            int64 `yaml:"max"`
-	IsMinInclusive bool  `yaml:"is_min_inclusive"`
-	IsMaxInclusive bool  `yaml:"is_max_inclusive"`
-}
-
 type Job struct {
 	Name        string          `yaml:"name"`
 	Enabled     bool            `yaml:"enabled"`
 	SourceTable SourceTableInfo `yaml:"source"`
 	TargetTable TargetTableInfo `yaml:"target"`
+	PreSQL      []string        `yaml:"pre_sql"`
+	PostSQL     []string        `yaml:"post_sql"`
 	JobConfig   `yaml:",inline"`
-	Range       RangeConfig `yaml:"range"`
 }
 
 type MigrationConfig struct {
@@ -95,8 +76,6 @@ func (c *MigrationConfig) UnmarshalYAML(value *yaml.Node) error {
 
 	c.MaxParallelWorkers = raw.MaxParallelWorkers
 	c.Defaults = raw.Defaults
-	c.SourceDbType = raw.SourceDbType
-	c.TargetDbType = raw.TargetDbType
 	c.Defaults.RowsPerPartition = int64(raw.Defaults.BatchSize * raw.Defaults.BatchesPerPartition)
 
 	for _, node := range raw.Jobs {

internal/app/custom_errors/extractor.error.go

@@ -103,8 +103,8 @@ func ExtractorErrorHandler(
 			if err.HasLastId {
 				newPartition.ParentId = err.Partition.Id
 				newPartition.Id = uuid.New()
-				newPartition.Range.Min = err.LastId
+				newPartition.LowerLimit = err.LastId
-				newPartition.Range.IsMinInclusive = false
+				newPartition.IsLowerLimitInclusive = false
 			}
 
 			requeueWithBackoff(ctx, delay, func() {

internal/app/db-wrapper/main.go

@@ -1,19 +0,0 @@
-package dbwrapper
-
-import "fmt"
-
-type Factory func() DbWrapper
-
-var drivers = make(map[string]Factory)
-
-func Register(name string, factory Factory) {
-	drivers[name] = factory
-}
-
-func New(driverType string) (DbWrapper, error) {
-	factory, ok := drivers[driverType]
-	if !ok {
-		return nil, fmt.Errorf("driver not yet supported: %s", driverType)
-	}
-	return factory(), nil
-}

internal/app/db-wrapper/mssql.go

@@ -1,176 +0,0 @@
-package dbwrapper
-
-import (
-	"context"
-	"database/sql"
-	"fmt"
-
-	mssql "github.com/microsoft/go-mssqldb"
-)
-
-func init() {
-	Register("sqlserver", func() DbWrapper {
-		return &mssqlDbWrapper{dialect: "sqlserver"}
-	})
-}
-
-type mssqlRowResult struct {
-	row *sql.Row
-}
-
-func (mr *mssqlRowResult) Scan(dest ...any) error {
-	return mr.row.Scan(dest...)
-}
-
-type mssqlRowsResult struct {
-	columns []string
-	rows    *sql.Rows
-}
-
-func (mr *mssqlRowsResult) Close() error {
-	return mr.rows.Close()
-}
-
-func (mr *mssqlRowsResult) Columns() ([]string, error) {
-	if mr.columns != nil {
-		return mr.columns, nil
-	}
-
-	return mr.rows.Columns()
-}
-
-func (mr *mssqlRowsResult) Err() error {
-	return mr.rows.Err()
-}
-
-func (mr *mssqlRowsResult) Next() bool {
-	return mr.rows.Next()
-}
-
-func (mr *mssqlRowsResult) Scan(dest ...any) error {
-	return mr.rows.Scan(dest...)
-}
-
-func (mr *mssqlRowsResult) Values() ([]any, error) {
-	columns, err := mr.Columns()
-	if err != nil {
-		return nil, err
-	}
-
-	rowValues := make([]any, len(columns))
-	scanArgs := make([]any, len(columns))
-	for i := range rowValues {
-		scanArgs[i] = &rowValues[i]
-	}
-
-	if err := mr.rows.Scan(scanArgs...); err != nil {
-		return nil, err
-	}
-
-	return rowValues, nil
-}
-
-type mssqlDbWrapper struct {
-	db      *sql.DB
-	dialect string
-}
-
-func (mw *mssqlDbWrapper) Connect(ctx context.Context, dbUrl string) error {
-	db, err := sql.Open("sqlserver", dbUrl)
-	if err != nil {
-		return err
-	}
-
-	if err := db.PingContext(ctx); err != nil {
-		if err := db.Close(); err != nil {
-			return err
-		}
-		return err
-	}
-
-	mw.db = db
-	return nil
-}
-
-func (mw *mssqlDbWrapper) Close() error {
-	return mw.db.Close()
-}
-
-func (mw *mssqlDbWrapper) Exec(ctx context.Context, query string, args ...any) (ExecResult, error) {
-	result, execErr := mw.db.ExecContext(ctx, query, args...)
-	if execErr != nil {
-		return ExecResult{}, execErr
-	}
-
-	affectedRows, err := result.RowsAffected()
-	if err != nil {
-		return ExecResult{}, err
-	}
-
-	return ExecResult{AffectedRows: affectedRows}, nil
-}
-
-func (mw *mssqlDbWrapper) GetDialect() string {
-	return mw.dialect
-}
-
-func (mw *mssqlDbWrapper) Query(ctx context.Context, query string, args ...any) (RowsResult, error) {
-	rows, err := mw.db.QueryContext(ctx, query, args...)
-	if err != nil {
-		return nil, err
-	}
-
-	return &mssqlRowsResult{columns: nil, rows: rows}, nil
-}
-
-func (mw *mssqlDbWrapper) QueryRow(ctx context.Context, query string, args ...any) RowResult {
-	row := mw.db.QueryRowContext(ctx, query, args...)
-	return &mssqlRowResult{row: row}
-}
-
-func (mw *mssqlDbWrapper) SaveMassive(ctx context.Context, schema string, table string, columnNames []string, rows [][]any) (int64, error) {
-	tx, err := mw.db.BeginTx(ctx, nil)
-	if err != nil {
-		return 0, err
-	}
-
-	fullTableName := fmt.Sprintf("[%s].[%s]", schema, table)
-
-	stmt, err := tx.PrepareContext(ctx, mssql.CopyIn(fullTableName, mssql.BulkOptions{}, columnNames...))
-	if err != nil {
-		tx.Rollback()
-		return 0, err
-	}
-
-	for _, row := range rows {
-		_, err = stmt.ExecContext(ctx, row...)
-		if err != nil {
-			stmt.Close()
-			tx.Rollback()
-			return 0, err
-		}
-	}
-
-	result, err := stmt.ExecContext(ctx)
-	if err != nil {
-		stmt.Close()
-		tx.Rollback()
-		return 0, err
-	}
-
-	if err := stmt.Close(); err != nil {
-		tx.Rollback()
-		return 0, err
-	}
-
-	if err := tx.Commit(); err != nil {
-		return 0, err
-	}
-
-	rowsAffected, raErr := result.RowsAffected()
-	if raErr != nil {
-		return 0, nil
-	}
-
-	return rowsAffected, nil
-}

internal/app/db-wrapper/postgres.go

@@ -1,128 +0,0 @@
-package dbwrapper
-
-import (
-	"context"
-	"errors"
-
-	"github.com/jackc/pgx/v5"
-	"github.com/jackc/pgx/v5/pgxpool"
-)
-
-func init() {
-	Register("postgres", func() DbWrapper {
-		return &postgresDbWrapper{dialect: "postgres"}
-	})
-}
-
-type postgresRowResult struct {
-	row pgx.Row
-}
-
-func (pr *postgresRowResult) Scan(dest ...any) error {
-	return pr.row.Scan(dest...)
-}
-
-type postgresRowsResult struct {
-	columns []string
-	rows    pgx.Rows
-}
-
-func (pr *postgresRowsResult) Close() error {
-	pr.rows.Close()
-	return nil
-}
-
-func (pr *postgresRowsResult) Columns() ([]string, error) {
-	if pr.columns != nil {
-		return pr.columns, nil
-	}
-
-	rawColumns := pr.rows.FieldDescriptions()
-	if rawColumns == nil {
-		return nil, errors.New("error retrieving columns")
-	}
-
-	columns := make([]string, 0, len(rawColumns))
-	for _, rc := range rawColumns {
-		columns = append(columns, rc.Name)
-	}
-
-	return columns, nil
-}
-
-func (pr *postgresRowsResult) Err() error {
-	return pr.rows.Err()
-}
-
-func (pr *postgresRowsResult) Next() bool {
-	return pr.rows.Next()
-}
-
-func (pr *postgresRowsResult) Scan(dest ...any) error {
-	return pr.rows.Scan(dest...)
-}
-
-func (pr *postgresRowsResult) Values() ([]any, error) {
-	return pr.rows.Values()
-}
-
-type postgresDbWrapper struct {
-	db      *pgxpool.Pool
-	dialect string
-}
-
-func (pw *postgresDbWrapper) Connect(ctx context.Context, dbUrl string) error {
-	pool, err := pgxpool.New(ctx, dbUrl)
-	if err != nil {
-		return err
-	}
-
-	if err := pool.Ping(ctx); err != nil {
-		pool.Close()
-		return err
-	}
-
-	pw.db = pool
-	return nil
-}
-
-func (pw *postgresDbWrapper) Close() error {
-	pw.db.Close()
-	return nil
-}
-
-func (pw *postgresDbWrapper) Exec(ctx context.Context, query string, args ...any) (ExecResult, error) {
-	result, err := pw.db.Exec(ctx, query, args...)
-	if err != nil {
-		return ExecResult{}, err
-	}
-
-	return ExecResult{AffectedRows: result.RowsAffected()}, nil
-}
-
-func (pw *postgresDbWrapper) GetDialect() string {
-	return pw.dialect
-}
-
-func (pw *postgresDbWrapper) Query(ctx context.Context, query string, args ...any) (RowsResult, error) {
-	rows, err := pw.db.Query(ctx, query, args...)
-	if err != nil {
-		return nil, err
-	}
-
-	return &postgresRowsResult{columns: nil, rows: rows}, nil
-}
-
-func (pw *postgresDbWrapper) QueryRow(ctx context.Context, query string, args ...any) RowResult {
-	row := pw.db.QueryRow(ctx, query, args...)
-	return &postgresRowResult{row: row}
-}
-
-func (pw *postgresDbWrapper) SaveMassive(ctx context.Context, schema string, table string, columnNames []string, rows [][]any) (int64, error) {
-	affectedRows, err := pw.db.CopyFrom(ctx, pgx.Identifier{schema, table}, columnNames, pgx.CopyFromRows(rows))
-	if err != nil {
-		return 0, err
-	}
-
-	return affectedRows, nil
-}

internal/app/db-wrapper/types.go

@@ -1,35 +0,0 @@
-package dbwrapper
-
-import (
-	"context"
-	"errors"
-)
-
-var MethodNotSupported error = errors.New("Method not supported by driver... yet :P")
-
-type ExecResult struct {
-	AffectedRows int64
-}
-
-type RowsResult interface {
-	Close() error
-	Columns() ([]string, error)
-	Err() error
-	Next() bool
-	Scan(dest ...any) error
-	Values() ([]any, error)
-}
-
-type RowResult interface {
-	Scan(dest ...any) error
-}
-
-type DbWrapper interface {
-	Close() error
-	Connect(ctx context.Context, dbUrl string) error
-	Exec(ctx context.Context, query string, args ...any) (ExecResult, error)
-	GetDialect() string
-	Query(ctx context.Context, query string, args ...any) (RowsResult, error)
-	QueryRow(ctx context.Context, query string, args ...any) RowResult
-	SaveMassive(ctx context.Context, schema string, table string, columnNames []string, rows [][]any) (int64, error)
-}

internal/app/db/mssql.go

@@ -0,0 +1,30 @@
+package db
+
+import (
+	"context"
+	"database/sql"
+)
+
+type MssqlDbWrapper struct {
+	db *sql.DB
+}
+
+func NewMssqlDbWrapper(db *sql.DB) DbWrapper {
+	return &MssqlDbWrapper{db: db}
+}
+
+func (wrapper *MssqlDbWrapper) Exec(ctx context.Context, query string, args ...any) (DbWrapperResult, error) {
+	result, execErr := wrapper.db.ExecContext(ctx, query, args...)
+	if execErr != nil {
+		return DbWrapperResult{}, execErr
+	}
+
+	affectedRows, err := result.RowsAffected()
+	if err != nil {
+		return DbWrapperResult{}, err
+	}
+
+	return DbWrapperResult{
+		AffectedRows: affectedRows,
+	}, nil
+}

internal/app/db/postgres.go

@@ -0,0 +1,47 @@
+package db
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+func Connect(ctx context.Context, dbURL string) (*pgxpool.Pool, error) {
+	pool, err := pgxpool.New(ctx, dbURL)
+	if err != nil {
+		return nil, fmt.Errorf("unable to connect to database: %w", err)
+	}
+
+	if err := pool.Ping(ctx); err != nil {
+		pool.Close()
+		return nil, fmt.Errorf("unable to ping database: %w", err)
+	}
+
+	return pool, nil
+}
+
+func Close(pool *pgxpool.Pool) {
+	if pool != nil {
+		pool.Close()
+	}
+}
+
+type PostgresDbWrapper struct {
+	db *pgxpool.Pool
+}
+
+func NewPostgresDbWrapper(db *pgxpool.Pool) DbWrapper {
+	return &PostgresDbWrapper{db: db}
+}
+
+func (wrapper *PostgresDbWrapper) Exec(ctx context.Context, query string, args ...any) (DbWrapperResult, error) {
+	result, err := wrapper.db.Exec(ctx, query, args...)
+	if err != nil {
+		return DbWrapperResult{}, err
+	}
+
+	return DbWrapperResult{
+		AffectedRows: result.RowsAffected(),
+	}, nil
+}

internal/app/db/types.go

@@ -0,0 +1,11 @@
+package db
+
+import "context"
+
+type DbWrapperResult struct {
+	AffectedRows int64
+}
+
+type DbWrapper interface {
+	Exec(ctx context.Context, query string, args ...any) (DbWrapperResult, error)
+}

internal/app/etl/extractors/main.go

@@ -1,101 +0,0 @@
-package extractors
-
-import (
-	"context"
-	"errors"
-	"slices"
-	"strings"
-	"sync"
-	"sync/atomic"
-
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/custom_errors"
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl"
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
-)
-
-func Consume(
-	ctx context.Context,
-	extractor etl.Extractor,
-	tableInfo config.SourceTableInfo,
-	columns []models.ColumnType,
-	batchSize int,
-	chPartitionsIn <-chan models.Partition,
-	chBatchesOut chan<- models.Batch,
-	chErrorsOut chan<- custom_errors.ExtractorError,
-	chJobErrorsOut chan<- custom_errors.JobError,
-	wgActivePartitions *sync.WaitGroup,
-	rowsRead *int64,
-) {
-	indexPrimaryKey := slices.IndexFunc(columns, func(col models.ColumnType) bool {
-		return strings.EqualFold(col.Name(), tableInfo.PrimaryKey)
-	})
-
-	if indexPrimaryKey == -1 {
-		select {
-		case <-ctx.Done():
-			return
-		case chJobErrorsOut <- custom_errors.JobError{
-			ShouldCancelJob: true,
-			Msg:             "Primary key not found in provided columns",
-		}:
-		}
-
-		return
-	}
-
-	for {
-		if ctx.Err() != nil {
-			return
-		}
-
-		select {
-		case <-ctx.Done():
-			return
-		case partition, ok := <-chPartitionsIn:
-			if !ok {
-				return
-			}
-
-			rowsReadResult, err := extractor.Exec(
-				ctx,
-				tableInfo,
-				columns,
-				batchSize,
-				partition,
-				indexPrimaryKey,
-				chBatchesOut,
-			)
-
-			if rowsReadResult > 0 {
-				atomic.AddInt64(rowsRead, int64(rowsReadResult))
-			}
-
-			if err != nil {
-				if exError, ok := errors.AsType[*custom_errors.ExtractorError](err); ok {
-					select {
-					case <-ctx.Done():
-						return
-					case chErrorsOut <- *exError:
-					}
-				} else if jobError, ok := errors.AsType[*custom_errors.JobError](err); ok {
-					select {
-					case <-ctx.Done():
-						return
-					case chJobErrorsOut <- *jobError:
-					}
-				} else {
-					select {
-					case <-ctx.Done():
-						return
-					case chErrorsOut <- custom_errors.ExtractorError{Partition: partition, Msg: err.Error()}:
-					}
-				}
-
-				continue
-			}
-
-			wgActivePartitions.Done()
-		}
-	}
-}

internal/app/etl/extractors/mssql.go

@@ -5,22 +5,24 @@ import (
 	"database/sql"
 	"errors"
 	"fmt"
+	"slices"
 	"strings"
+	"sync"
+	"sync/atomic"
 
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/convert"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/custom_errors"
-	dbwrapper "git.ksdemosapps.com/kylesoda/go-migrate/internal/app/db-wrapper"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
 	"github.com/google/uuid"
 )
 
 type MssqlExtractor struct {
-	db dbwrapper.DbWrapper
+	db *sql.DB
 }
 
-func NewMssqlExtractor(db dbwrapper.DbWrapper) etl.Extractor {
+func NewMssqlExtractor(db *sql.DB) etl.Extractor {
 	return &MssqlExtractor{db: db}
 }
 
@@ -29,9 +31,6 @@ func buildExtractQueryMssql(
 	columns []models.ColumnType,
 	includeRange bool,
 	isMinInclusive bool,
-	isMaxInclusive bool,
-	hasMin bool,
-	hasMax bool,
 ) string {
 	var sbQuery strings.Builder
 
@@ -55,32 +54,15 @@ func buildExtractQueryMssql(
 
 	fmt.Fprintf(&sbQuery, " FROM [%s].[%s]", tableInfo.Schema, tableInfo.Table)
 
-	if includeRange && (hasMin || hasMax) {
+	if includeRange {
-		sbQuery.WriteString(" WHERE ")
+		fmt.Fprintf(&sbQuery, " WHERE [%s]", tableInfo.PrimaryKey)
-
-		if hasMin {
-			fmt.Fprintf(&sbQuery, "[%s]", tableInfo.PrimaryKey)
 		if isMinInclusive {
 			sbQuery.WriteString(" >=")
 		} else {
 			sbQuery.WriteString(" >")
 		}
-			sbQuery.WriteString(" @min")
-		}
 
-		if hasMin && hasMax {
+		fmt.Fprintf(&sbQuery, " @min AND [%s] <= @max", tableInfo.PrimaryKey)
-			sbQuery.WriteString(" AND ")
-		}
-
-		if hasMax {
-			fmt.Fprintf(&sbQuery, "[%s]", tableInfo.PrimaryKey)
-			if isMaxInclusive {
-				sbQuery.WriteString(" <=")
-			} else {
-				sbQuery.WriteString(" <")
-			}
-			sbQuery.WriteString(" @max")
-		}
 	}
 
 	fmt.Fprintf(&sbQuery, " ORDER BY [%s] ASC", tableInfo.PrimaryKey)
@@ -116,7 +98,7 @@ func errorFromLastRow(
 	}
 }
 
-func (mssqlEx *MssqlExtractor) Exec(
+func (mssqlEx *MssqlExtractor) ProcessPartition(
 	ctx context.Context,
 	tableInfo config.SourceTableInfo,
 	columns []models.ColumnType,
@@ -125,20 +107,18 @@ func (mssqlEx *MssqlExtractor) Exec(
 	indexPrimaryKey int,
 	chBatchesOut chan<- models.Batch,
 ) (int, error) {
-	hasMin := partition.HasRange && partition.Range.Min > 0
+	query := buildExtractQueryMssql(tableInfo, columns, partition.ShouldUseRange, partition.IsLowerLimitInclusive)
-	hasMax := partition.HasRange && partition.Range.Max > 0
-	query := buildExtractQueryMssql(tableInfo, columns, partition.HasRange, partition.Range.IsMinInclusive, partition.Range.IsMaxInclusive, hasMin, hasMax)
 
 	var queryArgs []any
-	if hasMin {
+	if partition.ShouldUseRange {
-		queryArgs = append(queryArgs, sql.Named("min", partition.Range.Min))
+		queryArgs = append(queryArgs,
-	}
+			sql.Named("min", partition.LowerLimit),
-	if hasMax {
+			sql.Named("max", partition.UpperLimit),
-		queryArgs = append(queryArgs, sql.Named("max", partition.Range.Max))
+		)
 	}
 
 	rowsRead := 0
-	rows, err := mssqlEx.db.Query(ctx, query, queryArgs...)
+	rows, err := mssqlEx.db.QueryContext(ctx, query, queryArgs...)
 	if err != nil {
 		return rowsRead, &custom_errors.ExtractorError{Partition: partition, HasLastId: false, Msg: err.Error()}
 	}
@@ -207,3 +187,90 @@ func (mssqlEx *MssqlExtractor) Exec(
 
 	return rowsRead, nil
 }
+
+func (mssqlEx *MssqlExtractor) Exec(
+	ctx context.Context,
+	tableInfo config.SourceTableInfo,
+	columns []models.ColumnType,
+	batchSize int,
+	chPartitionsIn <-chan models.Partition,
+	chBatchesOut chan<- models.Batch,
+	chErrorsOut chan<- custom_errors.ExtractorError,
+	chJobErrorsOut chan<- custom_errors.JobError,
+	wgActivePartitions *sync.WaitGroup,
+	rowsRead *int64,
+) {
+	indexPrimaryKey := slices.IndexFunc(columns, func(col models.ColumnType) bool {
+		return strings.EqualFold(col.Name(), tableInfo.PrimaryKey)
+	})
+
+	if indexPrimaryKey == -1 {
+		select {
+		case <-ctx.Done():
+			return
+		case chJobErrorsOut <- custom_errors.JobError{
+			ShouldCancelJob: true,
+			Msg:             "Primary key not found in provided columns",
+		}:
+		}
+
+		return
+	}
+
+	for {
+		if ctx.Err() != nil {
+			return
+		}
+
+		select {
+		case <-ctx.Done():
+			return
+		case partition, ok := <-chPartitionsIn:
+			if !ok {
+				return
+			}
+
+			rowsReadResult, err := mssqlEx.ProcessPartition(
+				ctx,
+				tableInfo,
+				columns,
+				batchSize,
+				partition,
+				indexPrimaryKey,
+				chBatchesOut,
+			)
+
+			if rowsReadResult > 0 {
+				atomic.AddInt64(rowsRead, int64(rowsReadResult))
+			}
+
+			if err != nil {
+				var exError *custom_errors.ExtractorError
+				var jobError *custom_errors.JobError
+				if errors.As(err, &exError) {
+					select {
+					case <-ctx.Done():
+						return
+					case chErrorsOut <- *exError:
+					}
+				} else if errors.As(err, &jobError) {
+					select {
+					case <-ctx.Done():
+						return
+					case chJobErrorsOut <- *jobError:
+					}
+				} else {
+					select {
+					case <-ctx.Done():
+						return
+					case chErrorsOut <- custom_errors.ExtractorError{Partition: partition, Msg: err.Error()}:
+					}
+				}
+
+				continue
+			}
+
+			wgActivePartitions.Done()
+		}
+	}
+}

internal/app/etl/extractors/postgres.go

@@ -2,34 +2,28 @@ package extractors
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"strings"
+	"sync"
 
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/custom_errors"
-	dbwrapper "git.ksdemosapps.com/kylesoda/go-migrate/internal/app/db-wrapper"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
 	"github.com/google/uuid"
+	"github.com/jackc/pgx/v5/pgxpool"
 )
 
 type PostgresExtractor struct {
-	db dbwrapper.DbWrapper
+	db *pgxpool.Pool
 }
 
-func NewPostgresExtractor(db dbwrapper.DbWrapper) etl.Extractor {
+func NewPostgresExtractor(pool *pgxpool.Pool) etl.Extractor {
-	return &PostgresExtractor{db: db}
+	return &PostgresExtractor{db: pool}
 }
 
-func buildExtractQueryPostgres(
+func buildExtractQueryPostgres(sourceDbInfo config.SourceTableInfo, columns []models.ColumnType) string {
-	sourceDbInfo config.SourceTableInfo,
-	columns []models.ColumnType,
-	includeRange bool,
-	isMinInclusive bool,
-	isMaxInclusive bool,
-	hasMin bool,
-	hasMax bool,
-) string {
 	var sbColumns strings.Builder
 
 	if len(columns) == 0 {
@@ -54,44 +48,10 @@ func buildExtractQueryPostgres(
 		}
 	}
 
-	query := fmt.Sprintf(`SELECT %s FROM "%s"."%s"`, sbColumns.String(), sourceDbInfo.Schema, sourceDbInfo.Table)
+	return fmt.Sprintf(`SELECT %s FROM "%s"."%s"  ORDER BY "%s" ASC`, sbColumns.String(), sourceDbInfo.Schema, sourceDbInfo.Table, sourceDbInfo.PrimaryKey)
-
-	if includeRange && (hasMin || hasMax) {
-		query += " WHERE "
-		paramIdx := 1
-
-		if hasMin {
-			query += fmt.Sprintf(`"%s"`, sourceDbInfo.PrimaryKey)
-			if isMinInclusive {
-				query += " >="
-			} else {
-				query += " >"
-			}
-			query += fmt.Sprintf(" $%d", paramIdx)
-			paramIdx++
-		}
-
-		if hasMin && hasMax {
-			query += " AND "
-		}
-
-		if hasMax {
-			query += fmt.Sprintf(`"%s"`, sourceDbInfo.PrimaryKey)
-			if isMaxInclusive {
-				query += " <="
-			} else {
-				query += " <"
-			}
-			query += fmt.Sprintf(" $%d", paramIdx)
-		}
-	}
-
-	query += fmt.Sprintf(` ORDER BY "%s" ASC`, sourceDbInfo.PrimaryKey)
-
-	return query
 }
 
-func (postgresEx *PostgresExtractor) Exec(
+func (postgresEx *PostgresExtractor) ProcessPartition(
 	ctx context.Context,
 	tableInfo config.SourceTableInfo,
 	columns []models.ColumnType,
@@ -100,20 +60,14 @@ func (postgresEx *PostgresExtractor) Exec(
 	indexPrimaryKey int,
 	chBatchesOut chan<- models.Batch,
 ) (int, error) {
-	hasMin := partition.HasRange && partition.Range.Min > 0
+	query := buildExtractQueryPostgres(tableInfo, columns)
-	hasMax := partition.HasRange && partition.Range.Max > 0
-	query := buildExtractQueryPostgres(tableInfo, columns, partition.HasRange, partition.Range.IsMinInclusive, partition.Range.IsMaxInclusive, hasMin, hasMax)
 
-	var queryArgs []any
+	if partition.ShouldUseRange {
-	if hasMin {
+		return 0, errors.New("Batch config not yet supported")
-		queryArgs = append(queryArgs, partition.Range.Min)
-	}
-	if hasMax {
-		queryArgs = append(queryArgs, partition.Range.Max)
 	}
 
 	rowsRead := 0
-	rows, err := postgresEx.db.Query(ctx, query, queryArgs...)
+	rows, err := postgresEx.db.Query(ctx, query)
 	if err != nil {
 		return rowsRead, &custom_errors.ExtractorError{Partition: partition, HasLastId: false, Msg: err.Error()}
 	}
@@ -124,7 +78,7 @@ func (postgresEx *PostgresExtractor) Exec(
 	for rows.Next() {
 		values, err := rows.Values()
 		if err != nil {
-			return rowsRead, &custom_errors.ExtractorError{Partition: partition, HasLastId: false, Msg: err.Error()}
+			return rowsRead, errors.New("Unexpected error reading rows from source")
 		}
 		rowsRead++
 
@@ -142,7 +96,7 @@ func (postgresEx *PostgresExtractor) Exec(
 	}
 
 	if err := rows.Err(); err != nil {
-		return rowsRead, &custom_errors.ExtractorError{Partition: partition, HasLastId: false, Msg: err.Error()}
+		return rowsRead, errors.New("Unexpected error reading rows from source")
 	}
 
 	if len(batchRows) > 0 {
@@ -155,3 +109,17 @@ func (postgresEx *PostgresExtractor) Exec(
 
 	return rowsRead, nil
 }
+
+func (postgresEx *PostgresExtractor) Exec(
+	ctx context.Context,
+	tableInfo config.SourceTableInfo,
+	columns []models.ColumnType,
+	batchSize int,
+	chPartitionsIn <-chan models.Partition,
+	chBatchesOut chan<- models.Batch,
+	chErrorsOut chan<- custom_errors.ExtractorError,
+	chJobErrorsOut chan<- custom_errors.JobError,
+	wgActivePartitions *sync.WaitGroup,
+	rowsRead *int64,
+) {
+}

internal/app/etl/extractors/types.go

@@ -0,0 +1 @@
+package extractors

internal/app/etl/loaders/postgres.go

@@ -9,32 +9,43 @@ import (
 
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/custom_errors"
-	dbwrapper "git.ksdemosapps.com/kylesoda/go-migrate/internal/app/db-wrapper"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
+	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgconn"
+	"github.com/jackc/pgx/v5/pgxpool"
 )
 
-type GenericLoader struct {
+type PostgresLoader struct {
-	db dbwrapper.DbWrapper
+	db *pgxpool.Pool
 }
 
-func NewGenericLoader(db dbwrapper.DbWrapper) etl.Loader {
+func NewPostgresLoader(pool *pgxpool.Pool) etl.Loader {
-	return &GenericLoader{db: db}
+	return &PostgresLoader{db: pool}
 }
 
-func (gl *GenericLoader) ProcessBatch(
+func mapSlice[T any, V any](input []T, mapper func(T) V) []V {
+	result := make([]V, len(input))
+
+	for i, v := range input {
+		result[i] = mapper(v)
+	}
+
+	return result
+}
+
+func (postgresLd *PostgresLoader) ProcessBatch(
 	ctx context.Context,
 	tableInfo config.TargetTableInfo,
 	colNames []string,
 	batch models.Batch,
 ) (int, error) {
-	_, err := gl.db.SaveMassive(
+	tableId := pgx.Identifier{tableInfo.Schema, tableInfo.Table}
+	_, err := postgresLd.db.CopyFrom(
 		ctx,
-		tableInfo.Schema,
+		tableId,
-		tableInfo.Table,
 		colNames,
-		batch.Rows,
+		pgx.CopyFromRows(batch.Rows),
 	)
 
 	if err != nil {
@@ -43,7 +54,7 @@ func (gl *GenericLoader) ProcessBatch(
 			if pgErr.Code == "23505" {
 				return 0, &custom_errors.JobError{
 					ShouldCancelJob: true,
-					Msg:             fmt.Sprintf("Fatal error in table %s.%s", tableInfo.Schema, tableInfo.Table),
+					Msg:             fmt.Sprintf("Fatal error in table %s", tableId.Sanitize()),
 					Prev:            err,
 				}
 			}
@@ -55,7 +66,7 @@ func (gl *GenericLoader) ProcessBatch(
 	return len(batch.Rows), nil
 }
 
-func (gl *GenericLoader) Exec(
+func (postgresLd *PostgresLoader) Exec(
 	ctx context.Context,
 	tableInfo config.TargetTableInfo,
 	columns []models.ColumnType,
@@ -82,7 +93,7 @@ func (gl *GenericLoader) Exec(
 				return
 			}
 
-			processedRows, err := gl.ProcessBatch(ctx, tableInfo, colNames, batch)
+			processedRows, err := postgresLd.ProcessBatch(ctx, tableInfo, colNames, batch)
 
 			if err != nil {
 				var ldError *custom_errors.LoaderError

internal/app/etl/loaders/types.go

@@ -0,0 +1 @@
+package loaders

internal/app/etl/loaders/utils.go

@@ -1,11 +0,0 @@
-package loaders
-
-func mapSlice[T any, V any](input []T, mapper func(T) V) []V {
-	result := make([]V, len(input))
-
-	for i, v := range input {
-		result[i] = mapper(v)
-	}
-
-	return result
-}

internal/app/etl/table_analyzers/main.go

@@ -15,22 +15,7 @@ func PartitionRangeGenerator(
 	tableInfo config.TableInfo,
 	partitionColumn string,
 	rowsPerPartition int64,
-	jobRange config.RangeConfig,
 ) ([]models.Partition, error) {
-	if jobRange.Min > 0 {
-		return []models.Partition{{
-			Id:           uuid.New(),
-			HasRange:     true,
-			RetryCounter: 0,
-			Range: models.PartitionRange{
-				Min:            jobRange.Min,
-				Max:            jobRange.Max,
-				IsMinInclusive: jobRange.IsMinInclusive,
-				IsMaxInclusive: jobRange.IsMaxInclusive,
-			},
-		}}, nil
-	}
-
 	rowsCount, err := tableAnalyzer.EstimateTotalRows(ctx, tableInfo)
 	if err != nil {
 		return nil, err
@@ -39,7 +24,7 @@ func PartitionRangeGenerator(
 	if rowsCount <= rowsPerPartition {
 		return []models.Partition{{
 			Id:             uuid.New(),
-			HasRange:     false,
+			ShouldUseRange: false,
 			RetryCounter:   0,
 		}}, nil
 

internal/app/etl/table_analyzers/mssql.go

@@ -8,17 +8,16 @@ import (
 	"time"
 
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
-	dbwrapper "git.ksdemosapps.com/kylesoda/go-migrate/internal/app/db-wrapper"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
 	"github.com/google/uuid"
 )
 
 type MssqlTableAnalyzer struct {
-	db dbwrapper.DbWrapper
+	db *sql.DB
 }
 
-func NewMssqlTableAnalyzer(db dbwrapper.DbWrapper) etl.TableAnalyzer {
+func NewMssqlTableAnalyzer(db *sql.DB) etl.TableAnalyzer {
 	return &MssqlTableAnalyzer{db: db}
 }
 
@@ -36,7 +35,7 @@ JOIN sys.types t ON c.user_type_id = t.user_type_id
 LEFT JOIN sys.types bt ON t.is_user_defined = 1 AND bt.user_type_id = t.system_type_id
 JOIN sys.tables st ON c.object_id = st.object_id
 JOIN sys.schemas s ON st.schema_id = s.schema_id
-WHERE s.name = @schema AND st.name = @table AND (c.is_hidden = 0 OR (c.graph_type IS NOT NULL AND c.name LIKE '$%'))
+WHERE s.name = @schema AND st.name = @table AND c.name NOT LIKE 'graph_id%'
 ORDER BY c.column_id;`
 
 type rawColumnMssql struct {
@@ -143,7 +142,7 @@ func (ta *MssqlTableAnalyzer) QueryColumnTypes(
 	localCtx, cancel := context.WithTimeout(ctx, 20*time.Second)
 	defer cancel()
 
-	rows, err := ta.db.Query(localCtx, mssqlColumnMetadataQuery, sql.Named("schema", tableInfo.Schema), sql.Named("table", tableInfo.Table))
+	rows, err := ta.db.QueryContext(localCtx, mssqlColumnMetadataQuery, sql.Named("schema", tableInfo.Schema), sql.Named("table", tableInfo.Table))
 	if err != nil {
 		return nil, err
 	}
@@ -184,11 +183,11 @@ JOIN sys.partitions p ON t.object_id = p.object_id
 WHERE s.name = @schema AND t.name = @table AND p.index_id IN (0, 1)
 GROUP BY t.name`
 
-	ctxTimeout, cancel := context.WithTimeout(ctx, 1*time.Minute)
+	ctxTimeout, cancel := context.WithTimeout(ctx, time.Second*20)
 	defer cancel()
 
 	var rowsCount int64
-	err := ta.db.QueryRow(ctxTimeout, query, sql.Named("schema", tableInfo.Schema), sql.Named("table", tableInfo.Table)).Scan(&rowsCount)
+	err := ta.db.QueryRowContext(ctxTimeout, query, sql.Named("schema", tableInfo.Schema), sql.Named("table", tableInfo.Table)).Scan(&rowsCount)
 	if err != nil {
 		return 0, err
 	}
@@ -216,10 +215,10 @@ ORDER BY batch_id`,
 		tableInfo.Schema,
 		tableInfo.Table)
 
-	ctxTimeout, cancel := context.WithTimeout(ctx, 1*time.Minute)
+	ctxTimeout, cancel := context.WithTimeout(ctx, time.Second*20)
 	defer cancel()
 
-	rows, err := ta.db.Query(ctxTimeout, query, sql.Named("maxPartitions", maxPartitions))
+	rows, err := ta.db.QueryContext(ctxTimeout, query, sql.Named("maxPartitions", maxPartitions))
 	if err != nil {
 		return nil, err
 	}
@@ -230,14 +229,12 @@ ORDER BY batch_id`,
 	for rows.Next() {
 		partition := models.Partition{
 			Id:                    uuid.New(),
-			HasRange:     true,
+			ShouldUseRange:        true,
 			RetryCounter:          0,
-			Range: models.PartitionRange{
+			IsLowerLimitInclusive: true,
-				IsMinInclusive: true,
-			},
 		}
 
-		if err := rows.Scan(&partition.Range.Min, &partition.Range.Max); err != nil {
+		if err := rows.Scan(&partition.LowerLimit, &partition.UpperLimit); err != nil {
 			return nil, err
 		}
 

internal/app/etl/table_analyzers/postgres.go

@@ -6,16 +6,16 @@ import (
 	"time"
 
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
-	dbwrapper "git.ksdemosapps.com/kylesoda/go-migrate/internal/app/db-wrapper"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
+	"github.com/jackc/pgx/v5/pgxpool"
 )
 
 type PostgresTableAnalyzer struct {
-	db dbwrapper.DbWrapper
+	db *pgxpool.Pool
 }
 
-func NewPostgresTableAnalyzer(db dbwrapper.DbWrapper) etl.TableAnalyzer {
+func NewPostgresTableAnalyzer(db *pgxpool.Pool) etl.TableAnalyzer {
 	return &PostgresTableAnalyzer{db: db}
 }
 
@@ -125,7 +125,7 @@ func (ta *PostgresTableAnalyzer) QueryColumnTypes(
 	ctx context.Context,
 	tableInfo config.TableInfo,
 ) ([]models.ColumnType, error) {
-	localCtx, cancel := context.WithTimeout(ctx, 1*time.Minute)
+	localCtx, cancel := context.WithTimeout(ctx, 20*time.Second)
 	defer cancel()
 
 	rows, err := ta.db.Query(localCtx, postgresColumnMetadataQuery, tableInfo.Schema, tableInfo.Table)

internal/app/etl/transformers/mssql.go

@@ -3,32 +3,18 @@ package transformers
 import (
 	"context"
 	"errors"
-	"fmt"
-	"strings"
 	"sync"
 	"time"
 
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/azure"
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/custom_errors"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/etl"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
-	"github.com/google/uuid"
-	log "github.com/sirupsen/logrus"
 )
 
-type MssqlTransformer struct {
+type MssqlTransformer struct{}
-	toStorage   config.ToStorageConfig
-	sourceTable config.SourceTableInfo
-	azureClient *azure.Client
-}
 
-func NewMssqlTransformer(toStorage config.ToStorageConfig, sourceTable config.SourceTableInfo, azureClient *azure.Client) etl.Transformer {
+func NewMssqlTransformer() etl.Transformer {
-	return &MssqlTransformer{
+	return &MssqlTransformer{}
-		toStorage:   toStorage,
-		sourceTable: sourceTable,
-		azureClient: azureClient,
-	}
 }
 
 func computeTransformationPlan(columns []models.ColumnType) []etl.ColumnTransformPlan {
@@ -74,65 +60,6 @@ func computeTransformationPlan(columns []models.ColumnType) []etl.ColumnTransfor
 	return plan
 }
 
-func computeStorageTransformationPlan(
-	ctx context.Context,
-	azureClient *azure.Client,
-	toStorage config.ToStorageConfig,
-	sourceColumns []models.ColumnType,
-	sourceTable config.SourceTableInfo,
-) []etl.ColumnTransformPlan {
-	if azureClient == nil || len(toStorage.Columns) == 0 {
-		return nil
-	}
-
-	colIndex := make(map[string]int, len(sourceColumns))
-	for i, col := range sourceColumns {
-		colIndex[strings.ToUpper(col.Name())] = i
-	}
-
-	var plan []etl.ColumnTransformPlan
-	for _, storageCol := range toStorage.Columns {
-		if storageCol.Mode != "REFERENCE_ONLY" {
-			log.Warnf("to_storage: unsupported mode %q for column %s — skipping", storageCol.Mode, storageCol.Source)
-			continue
-		}
-
-		idx, ok := colIndex[strings.ToUpper(storageCol.Source)]
-		if !ok {
-			log.Warnf("to_storage: source column %q not found in source schema — skipping", storageCol.Source)
-			continue
-		}
-
-		sourceColName := storageCol.Source
-		schema := sourceTable.Schema
-		table := sourceTable.Table
-
-		plan = append(plan, etl.ColumnTransformPlan{
-			Index: idx,
-			Fn: func(v any) (any, error) {
-				if v == nil {
-					return nil, nil
-				}
-				b, ok := v.([]byte)
-				if !ok {
-					log.Warnf("to_storage: expected []byte for %s.%s.%s, got %T — passing through",
-						schema, table, sourceColName, v)
-					return v, nil
-				}
-				start := time.Now()
-				blobPath := fmt.Sprintf("%s/%s/%s", schema, table, uuid.New().String())
-				blobURL, err := azureClient.UploadAndGetURL(ctx, blobPath, b)
-				if err != nil {
-					return nil, fmt.Errorf("uploading %s.%s.%s: %w", schema, table, sourceColName, err)
-				}
-				log.Debugf(`Succesfully uploaded "%s", (%vms)`, blobURL, time.Since(start).Milliseconds())
-				return blobURL, nil
-			},
-		})
-	}
-	return plan
-}
-
 const processBatchCtxCheck = 4096
 
 func (mssqlTr *MssqlTransformer) ProcessBatch(
@@ -173,8 +100,6 @@ func (mssqlTr *MssqlTransformer) Exec(
 	wgActiveBatches *sync.WaitGroup,
 ) {
 	transformationPlan := computeTransformationPlan(columns)
-	storagePlan := computeStorageTransformationPlan(ctx, mssqlTr.azureClient, mssqlTr.toStorage, columns, mssqlTr.sourceTable)
-	transformationPlan = append(transformationPlan, storagePlan...)
 
 	for {
 		if ctx.Err() != nil {

internal/app/etl/types.go

@@ -10,7 +10,7 @@ import (
 )
 
 type Extractor interface {
-	Exec(
+	ProcessPartition(
 		ctx context.Context,
 		tableInfo config.SourceTableInfo,
 		columns []models.ColumnType,
@@ -19,6 +19,19 @@ type Extractor interface {
 		indexPrimaryKey int,
 		chBatchesOut chan<- models.Batch,
 	) (int, error)
+
+	Exec(
+		ctx context.Context,
+		tableInfo config.SourceTableInfo,
+		columns []models.ColumnType,
+		batchSize int,
+		chPartitionsIn <-chan models.Partition,
+		chBatchesOut chan<- models.Batch,
+		chErrorsOut chan<- custom_errors.ExtractorError,
+		chJobErrorsOut chan<- custom_errors.JobError,
+		wgActivePartitions *sync.WaitGroup,
+		rowsRead *int64,
+	)
 }
 
 type TransformerFunc func(any) (any, error)

internal/app/models/main.go

@@ -1,10 +1,6 @@
 package models
 
-import (
+import "github.com/google/uuid"
-	"time"
-
-	"github.com/google/uuid"
-)
 
 type UnknownRowValues = []any
 
@@ -15,27 +11,12 @@ type Batch struct {
 	RetryCounter int
 }
 
-type PartitionRange struct {
-	Min            int64
-	Max            int64
-	IsMinInclusive bool
-	IsMaxInclusive bool
-}
-
 type Partition struct {
 	Id                    uuid.UUID
 	ParentId              uuid.UUID
-	Range        PartitionRange
+	LowerLimit            int64
-	HasRange     bool
+	UpperLimit            int64
+	IsLowerLimitInclusive bool
+	ShouldUseRange        bool
 	RetryCounter          int
 }
-
-type JobResult struct {
-	JobName    string
-	StartTime  time.Time
-	Duration   time.Duration
-	RowsRead   int64
-	RowsLoaded int64
-	RowsFailed int64
-	Error      error
-}

scripts/az-blob/main.go

@@ -1,44 +0,0 @@
-package main
-
-import (
-	"context"
-	"fmt"
-	"log"
-	"math/rand"
-	"sync"
-
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/azure"
-	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
-)
-
-func main() {
-	cfg := config.App.AzureStorage
-	containerName := cfg.Container
-
-	client, err := azure.NewClient(cfg)
-	if err != nil {
-		log.Fatalf("Error creando cliente: %v", err)
-	}
-	ctx := context.Background()
-
-	var wg sync.WaitGroup
-
-	for i := 1; i <= 10; i++ {
-		wg.Add(1)
-		go func(id int) {
-			defer wg.Done()
-
-			blobName := fmt.Sprintf("%sarchivo-%d.txt", cfg.Prefix, id)
-			content := fmt.Sprintf("Contenido aleatorio: %d", rand.Intn(100000))
-
-			err := client.UploadBuffer(ctx, containerName, blobName, []byte(content))
-			if err != nil {
-				log.Printf("Fallo al subir %s: %v", blobName, err)
-			} else {
-				fmt.Printf("Subido exitosamente: %s\n", blobName)
-			}
-		}(i)
-	}
-
-	wg.Wait()
-}

scripts/backoff-test/main.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"github.com/cenkalti/backoff/v5"
+)
+
+func ExampleRetry() {
+	// Define an operation function that returns a value and an error.
+	// The value can be any type.
+	// We'll pass this operation to Retry function.
+	operation := func() (string, error) {
+		// An example request that may fail.
+		resp, err := http.Get("http://httpbin.org/get")
+		if err != nil {
+			return "", err
+		}
+		defer resp.Body.Close()
+
+		// If we are being rate limited, return a RetryAfter to specify how long to wait.
+		// This will also reset the backoff policy.
+		if resp.StatusCode == 429 {
+			seconds, err := strconv.ParseInt(resp.Header.Get("Retry-After"), 10, 64)
+			if err == nil {
+				return "", backoff.RetryAfter(int(seconds))
+			}
+		}
+
+		// In case of non-retriable error, return Permanent error to stop retrying.
+		// For this HTTP example, client errors are non-retriable.
+		if resp.StatusCode >= 400 && resp.StatusCode < 500 {
+			return "", backoff.Permanent(errors.New("bad request"))
+		}
+
+		// Return successful response.
+		return "hello", nil
+	}
+
+	result, err := backoff.Retry(context.TODO(), operation, backoff.WithBackOff(backoff.NewExponentialBackOff()))
+	if err != nil {
+		fmt.Println("Error:", err)
+		return
+	}
+
+	// Operation is successful after retries.
+
+	fmt.Println(result)
+	// Output: hello
+}
+
+func main() {
+	ExampleRetry()
+}

scripts/pg-info-test/main.go

@@ -8,32 +8,13 @@ import (
 	"time"
 
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
+	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/db"
 	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgtype"
 	"github.com/jackc/pgx/v5/pgxpool"
 	log "github.com/sirupsen/logrus"
 )
 
-func Connect(ctx context.Context, dbURL string) (*pgxpool.Pool, error) {
-	pool, err := pgxpool.New(ctx, dbURL)
-	if err != nil {
-		return nil, fmt.Errorf("unable to connect to database: %w", err)
-	}
-
-	if err := pool.Ping(ctx); err != nil {
-		pool.Close()
-		return nil, fmt.Errorf("unable to ping database: %w", err)
-	}
-
-	return pool, nil
-}
-
-func Close(pool *pgxpool.Pool) {
-	if pool != nil {
-		pool.Close()
-	}
-}
-
 func main() {
 	log.SetFormatter(&log.TextFormatter{
 		FullTimestamp:   true,
@@ -46,8 +27,8 @@ func main() {
 	ctxSource, cancel := context.WithTimeout(context.Background(), 20*time.Second)
 	defer cancel()
 
-	sourcePool, err := Connect(ctxSource, config.App.SourceDbUrl)
+	sourcePool, err := db.Connect(ctxSource, config.App.SourceDbUrl)
-	defer Close(sourcePool)
+	defer db.Close(sourcePool)
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -56,8 +37,8 @@ func main() {
 	ctxTarget, cancel := context.WithTimeout(context.Background(), 20*time.Second)
 	defer cancel()
 
-	targetPool, err := Connect(ctxTarget, config.App.TargetDbUrl)
+	targetPool, err := db.Connect(ctxTarget, config.App.TargetDbUrl)
-	defer Close(targetPool)
+	defer db.Close(targetPool)
 	if err != nil {
 		log.Fatal(err)
 	}