feat: update job configuration for infraestructura_site_holder__attach; enhance storage handling and retry logic

feat: update configuration handling to use cleanenv; remove unused dependencies and improve error logging
feat: integrate Azure storage handling in migration process; update transformers and job processing logic
2026-04-22 15:23:19 -05:00 · 2026-04-22 12:31:31 -05:00 · 2026-04-21 14:15:20 -05:00 · 2026-04-21 13:43:03 -05:00 · 2026-04-21 13:38:11 -05:00 · 2026-04-21 12:30:40 -05:00
23 changed files with 628 additions and 290 deletions
--- a/.atl/skill-registry.md
+++ b/.atl/skill-registry.md
@@ -0,0 +1,24 @@
+# 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 |
--- a/.env.example
+++ b/.env.example
@@ -1,2 +1,12 @@
-PG_FROM_DB_URL=postgresql://postgres:password@localhost:5432/db
-PG_TO_DB_URL=postgresql://postgres:password@localhost:5432/db
+SOURCE_DB_URL=sqlserver://sa:password@localhost:1433?database=master&packet+size=32767&loc=UTC
+TARGET_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=
--- a/.gitignore
+++ b/.gitignore
@@ -27,5 +27,5 @@ go.work.sum

 # Editor/IDE
 # .idea/
-# .vscode/
+.vscode/
 .temp
--- a/cmd/go_migrate/log.go
+++ b/cmd/go_migrate/log.go
@@ -3,6 +3,7 @@ package main
 import (
 	"time"

+	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
 	log "github.com/sirupsen/logrus"
 )

@@ -13,5 +14,13 @@ 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)
 }
--- a/cmd/go_migrate/main.go
+++ b/cmd/go_migrate/main.go
@@ -5,12 +5,12 @@ import (
 	"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/db-wrapper"
+	dbwrapper "git.ksdemosapps.com/kylesoda/go-migrate/internal/app/db-wrapper"
 	"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/etl/transformers"
 	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/models"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/sync/errgroup"
@@ -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()

@@ -119,8 +119,16 @@ func processMigrationJobs(
 	sourceTableAnalyzer := table_analyzers.NewMssqlTableAnalyzer(sourceDb)
 	targetTableAnalyzer := table_analyzers.NewPostgresTableAnalyzer(targetDb)
 	extractor := extractors.NewMssqlExtractor(sourceDb)
-	transformer := transformers.NewMssqlTransformer()
-	loader := loaders.NewPostgresLoader(targetDb)
+	loader := loaders.NewGenericLoader(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() {
@@ -132,9 +140,10 @@ func processMigrationJobs(
 					sourceTableAnalyzer,
 					targetTableAnalyzer,
 					extractor,
-					transformer,
+					azureClient,
 					loader,
 					job,
+					targetDb.GetDialect(),
 				)

 				chJobResults <- res
--- a/cmd/go_migrate/process.go
+++ b/cmd/go_migrate/process.go
@@ -7,26 +7,45 @@ import (
 	"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/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,
 	sourceTableAnalyzer etl.TableAnalyzer,
 	targetTableAnalyzer etl.TableAnalyzer,
 	extractor etl.Extractor,
-	transformer etl.Transformer,
+	azureClient *azure.Client,
 	loader etl.Loader,
 	job config.Job,
+	targetDbType string,
 ) models.JobResult {
+	transformer := transformers.NewMssqlTransformer(job.ToStorage, job.SourceTable, azureClient)
 	localCtx, cancel := context.WithCancel(ctx)
 	defer cancel()

@@ -66,7 +85,13 @@ func processMigrationJob(
 		return result
 	}

-	for _, query := range job.PreSQL {
+	preSqlQueries := job.TargetTable.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
@@ -79,6 +104,7 @@ func processMigrationJob(
 		job.SourceTable.TableInfo,
 		job.SourceTable.PrimaryKey,
 		job.RowsPerPartition,
+		job.Range,
 	)
 	if err != nil {
 		log.Error("Unexpected error calculating batch ranges: ", err)
@@ -129,8 +155,9 @@ func processMigrationJob(

 	for range maxExtractors {
 		wgExtractors.Go(func() {
-			extractor.Exec(
+			extractors.Consume(
 				localCtx,
+				extractor,
 				job.SourceTable,
 				sourceColTypes,
 				job.BatchSize,
@@ -214,7 +241,7 @@ func processMigrationJob(
 		cancel()
 	}()

-	for _, query := range job.PostSQL {
+	for _, query := range job.TargetTable.PostSQL {
 		if _, err := targetDbWrapper.Exec(localCtx, query); err != nil {
 			result.Error = err
 			return result
--- a/config.yaml
+++ b/config.yaml
@@ -28,9 +28,8 @@ jobs:
    target:
      schema: Cartografia
      table: MANZANA
-    pre_sql: 
-      - 'SELECT 1'
-      # - 'TRUNCATE TABLE "Cartografia"."MANZANA"'
+      pre_sql: 
+        - 'SELECT 1'
    range:
      min: 1000000
      max: 2000000
@@ -46,8 +45,30 @@ jobs:
    target:
      schema: Red
      table: PUERTO
-    pre_sql: 
-      - 'SELECT 1'
-      # - 'TRUNCATE TABLE "Red"."PUERTO"'
-    post_sql: 
-      - "SELECT 1"
+      pre_sql: 
+        - '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
--- a/go.mod
+++ b/go.mod
@@ -1,12 +1,13 @@
 module git.ksdemosapps.com/kylesoda/go-migrate

-go 1.25.7
+go 1.26

 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
@@ -15,17 +16,20 @@ require (
 )

 require (
-	github.com/cenkalti/backoff v2.2.1+incompatible // indirect
-	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.21.0 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.2 // 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/kr/text v0.2.0 // indirect
+	github.com/joho/godotenv v1.5.1 // 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
 )
--- a/go.sum
+++ b/go.sum
@@ -4,23 +4,25 @@ 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=
@@ -36,6 +38,8 @@ 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=
@@ -46,8 +50,8 @@ 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 v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
-github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
+github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 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=
@@ -87,3 +91,5 @@ 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=
--- a/internal/app/azure/main.go
+++ b/internal/app/azure/main.go
@@ -0,0 +1,87 @@
+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
+}
--- a/internal/app/config/main.go
+++ b/internal/app/config/main.go
@@ -1,41 +1,41 @@
 package config

 import (
-	"os"
-
-	"github.com/joho/godotenv"
+	"github.com/ilyakaznacheev/cleanenv"
 	log "github.com/sirupsen/logrus"
 )

-type appConfig struct {
-	SourceDbUrl string
-	TargetDbUrl string
+type AzureStorageConfig struct {
+	AccountName string `env:"AZ_ACCOUNT_NAME"`
+	Container   string `env:"AZ_CONTAINER"`
+	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"`
 }

-func loadEnv() {
-	err := godotenv.Load()
-	if err != nil {
-		log.Warn("Warning: could not load .env file")
-	}
+type appConfig struct {
+	SourceDbUrl  string `env:"SOURCE_DB_URL" env-required:"true"`
+	TargetDbUrl  string `env:"TARGET_DB_URL" env-required:"true"`
+	LogLevel     string `env:"LOG_LEVEL" env-default:"INFO"`
+	AzureStorage AzureStorageConfig
 }

 func getAppConfig() appConfig {
-	loadEnv()
+	var cfg appConfig

-	sourceDbUrl := os.Getenv("SOURCE_DB_URL")
-	if sourceDbUrl == "" {
-		log.Fatal("SOURCE_DB_URL environment variable not set")
+	err := cleanenv.ReadConfig(".env", &cfg)
+	if err != nil {
+		log.Warn("Could not load .env file")
 	}

-	targetDbUrl := os.Getenv("TARGET_DB_URL")
-	if targetDbUrl == "" {
-		log.Fatal("TARGET_DB_URL environment variable not set")
+	err = cleanenv.ReadEnv(&cfg)
+	if err != nil {
+		log.Fatalf("Error al cargar variables: %v", err)
 	}

-	return appConfig{
-		SourceDbUrl: sourceDbUrl,
-		TargetDbUrl: targetDbUrl,
-	}
+	return cfg
 }

 var App appConfig = getAppConfig()
--- a/internal/app/config/migration.go
+++ b/internal/app/config/migration.go
@@ -14,6 +14,16 @@ 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"`
@@ -26,6 +36,7 @@ type JobConfig struct {
 	MaxChunkErrors      int         `yaml:"max_chunk_errors"`
 	Retry               RetryConfig `yaml:"retry"`
 	RowsPerPartition    int64
+	ToStorage           ToStorageConfig `yaml:"to_storage"`
 }

 type TableInfo struct {
@@ -33,29 +44,31 @@ 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       struct {
-		Min            int64 `yaml:"min"`
-		Max            int64 `yaml:"max"`
-		IsMinInclusive bool  `yaml:"is_min_inclusive"`
-		IsMaxInclusive bool  `yaml:"is_max_inclusive"`
-	}
+	Range       RangeConfig `yaml:"range"`
 }

 type MigrationConfig struct {
--- a/internal/app/etl/extractors/main.go
+++ b/internal/app/etl/extractors/main.go
@@ -0,0 +1,101 @@
+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()
+		}
+	}
+}
--- a/internal/app/etl/extractors/mssql.go
+++ b/internal/app/etl/extractors/mssql.go
@@ -5,10 +5,7 @@ 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"
@@ -32,6 +29,9 @@ func buildExtractQueryMssql(
 	columns []models.ColumnType,
 	includeRange bool,
 	isMinInclusive bool,
+	isMaxInclusive bool,
+	hasMin bool,
+	hasMax bool,
 ) string {
 	var sbQuery strings.Builder

@@ -55,15 +55,32 @@ func buildExtractQueryMssql(

 	fmt.Fprintf(&sbQuery, " FROM [%s].[%s]", tableInfo.Schema, tableInfo.Table)

-	if includeRange {
-		fmt.Fprintf(&sbQuery, " WHERE [%s]", tableInfo.PrimaryKey)
-		if isMinInclusive {
-			sbQuery.WriteString(" >=")
-		} else {
-			sbQuery.WriteString(" >")
+	if includeRange && (hasMin || hasMax) {
+		sbQuery.WriteString(" WHERE ")
+
+		if hasMin {
+			fmt.Fprintf(&sbQuery, "[%s]", tableInfo.PrimaryKey)
+			if isMinInclusive {
+				sbQuery.WriteString(" >=")
+			} else {
+				sbQuery.WriteString(" >")
+			}
+			sbQuery.WriteString(" @min")
 		}

-		fmt.Fprintf(&sbQuery, " @min AND [%s] <= @max", tableInfo.PrimaryKey)
+		if hasMin && hasMax {
+			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)
@@ -99,7 +116,7 @@ func errorFromLastRow(
 	}
 }

-func (mssqlEx *MssqlExtractor) ProcessPartition(
+func (mssqlEx *MssqlExtractor) Exec(
 	ctx context.Context,
 	tableInfo config.SourceTableInfo,
 	columns []models.ColumnType,
@@ -108,14 +125,16 @@ func (mssqlEx *MssqlExtractor) ProcessPartition(
 	indexPrimaryKey int,
 	chBatchesOut chan<- models.Batch,
 ) (int, error) {
-	query := buildExtractQueryMssql(tableInfo, columns, partition.HasRange, partition.Range.IsMinInclusive)
+	hasMin := partition.HasRange && partition.Range.Min > 0
+	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 partition.HasRange {
-		queryArgs = append(queryArgs,
-			sql.Named("min", partition.Range.Min),
-			sql.Named("max", partition.Range.Max),
-		)
+	if hasMin {
+		queryArgs = append(queryArgs, sql.Named("min", partition.Range.Min))
+	}
+	if hasMax {
+		queryArgs = append(queryArgs, sql.Named("max", partition.Range.Max))
 	}

 	rowsRead := 0
@@ -188,90 +207,3 @@ func (mssqlEx *MssqlExtractor) ProcessPartition(

 	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()
-		}
-	}
-}
--- a/internal/app/etl/extractors/postgres.go
+++ b/internal/app/etl/extractors/postgres.go
@@ -2,10 +2,8 @@ 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"
@@ -23,7 +21,15 @@ func NewPostgresExtractor(db dbwrapper.DbWrapper) etl.Extractor {
 	return &PostgresExtractor{db: db}
 }

-func buildExtractQueryPostgres(sourceDbInfo config.SourceTableInfo, columns []models.ColumnType) string {
+func buildExtractQueryPostgres(
+	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 {
@@ -48,10 +54,44 @@ func buildExtractQueryPostgres(sourceDbInfo config.SourceTableInfo, columns []mo
 		}
 	}

-	return fmt.Sprintf(`SELECT %s FROM "%s"."%s"  ORDER BY "%s" ASC`, sbColumns.String(), sourceDbInfo.Schema, sourceDbInfo.Table, sourceDbInfo.PrimaryKey)
+	query := fmt.Sprintf(`SELECT %s FROM "%s"."%s"`, sbColumns.String(), sourceDbInfo.Schema, sourceDbInfo.Table)
+
+	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) ProcessPartition(
+func (postgresEx *PostgresExtractor) Exec(
 	ctx context.Context,
 	tableInfo config.SourceTableInfo,
 	columns []models.ColumnType,
@@ -60,14 +100,20 @@ func (postgresEx *PostgresExtractor) ProcessPartition(
 	indexPrimaryKey int,
 	chBatchesOut chan<- models.Batch,
 ) (int, error) {
-	query := buildExtractQueryPostgres(tableInfo, columns)
+	hasMin := partition.HasRange && partition.Range.Min > 0
+	hasMax := partition.HasRange && partition.Range.Max > 0
+	query := buildExtractQueryPostgres(tableInfo, columns, partition.HasRange, partition.Range.IsMinInclusive, partition.Range.IsMaxInclusive, hasMin, hasMax)

-	if partition.HasRange {
-		return 0, errors.New("Batch config not yet supported")
+	var queryArgs []any
+	if hasMin {
+		queryArgs = append(queryArgs, partition.Range.Min)
+	}
+	if hasMax {
+		queryArgs = append(queryArgs, partition.Range.Max)
 	}

 	rowsRead := 0
-	rows, err := postgresEx.db.Query(ctx, query)
+	rows, err := postgresEx.db.Query(ctx, query, queryArgs...)
 	if err != nil {
 		return rowsRead, &custom_errors.ExtractorError{Partition: partition, HasLastId: false, Msg: err.Error()}
 	}
@@ -78,7 +124,7 @@ func (postgresEx *PostgresExtractor) ProcessPartition(
 	for rows.Next() {
 		values, err := rows.Values()
 		if err != nil {
-			return rowsRead, errors.New("Unexpected error reading rows from source")
+			return rowsRead, &custom_errors.ExtractorError{Partition: partition, HasLastId: false, Msg: err.Error()}
 		}
 		rowsRead++

@@ -96,7 +142,7 @@ func (postgresEx *PostgresExtractor) ProcessPartition(
 	}

 	if err := rows.Err(); err != nil {
-		return rowsRead, errors.New("Unexpected error reading rows from source")
+		return rowsRead, &custom_errors.ExtractorError{Partition: partition, HasLastId: false, Msg: err.Error()}
 	}

 	if len(batchRows) > 0 {
@@ -109,17 +155,3 @@ func (postgresEx *PostgresExtractor) ProcessPartition(

 	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,
-) {
-}
--- a/internal/app/etl/loaders/postgres.go
+++ b/internal/app/etl/loaders/postgres.go
@@ -15,31 +15,21 @@ import (
 	"github.com/jackc/pgx/v5/pgconn"
 )

-type PostgresLoader struct {
+type GenericLoader struct {
 	db dbwrapper.DbWrapper
 }

-func NewPostgresLoader(db dbwrapper.DbWrapper) etl.Loader {
-	return &PostgresLoader{db: db}
+func NewGenericLoader(db dbwrapper.DbWrapper) etl.Loader {
+	return &GenericLoader{db: db}
 }

-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(
+func (gl *GenericLoader) ProcessBatch(
 	ctx context.Context,
 	tableInfo config.TargetTableInfo,
 	colNames []string,
 	batch models.Batch,
 ) (int, error) {
-	_, err := postgresLd.db.SaveMassive(
+	_, err := gl.db.SaveMassive(
 		ctx,
 		tableInfo.Schema,
 		tableInfo.Table,
@@ -65,7 +55,7 @@ func (postgresLd *PostgresLoader) ProcessBatch(
 	return len(batch.Rows), nil
 }

-func (postgresLd *PostgresLoader) Exec(
+func (gl *GenericLoader) Exec(
 	ctx context.Context,
 	tableInfo config.TargetTableInfo,
 	columns []models.ColumnType,
@@ -92,7 +82,7 @@ func (postgresLd *PostgresLoader) Exec(
 				return
 			}

-			processedRows, err := postgresLd.ProcessBatch(ctx, tableInfo, colNames, batch)
+			processedRows, err := gl.ProcessBatch(ctx, tableInfo, colNames, batch)

 			if err != nil {
 				var ldError *custom_errors.LoaderError
--- a/internal/app/etl/loaders/types.go
+++ b/internal/app/etl/loaders/types.go
@@ -1 +0,0 @@
-package loaders
--- a/internal/app/etl/loaders/utils.go
+++ b/internal/app/etl/loaders/utils.go
@@ -0,0 +1,11 @@
+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
+}
--- a/internal/app/etl/table_analyzers/main.go
+++ b/internal/app/etl/table_analyzers/main.go
@@ -15,7 +15,22 @@ 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
--- a/internal/app/etl/transformers/mssql.go
+++ b/internal/app/etl/transformers/mssql.go
@@ -3,18 +3,32 @@ 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() etl.Transformer {
-	return &MssqlTransformer{}
+func NewMssqlTransformer(toStorage config.ToStorageConfig, sourceTable config.SourceTableInfo, azureClient *azure.Client) etl.Transformer {
+	return &MssqlTransformer{
+		toStorage:   toStorage,
+		sourceTable: sourceTable,
+		azureClient: azureClient,
+	}
 }

 func computeTransformationPlan(columns []models.ColumnType) []etl.ColumnTransformPlan {
@@ -60,6 +74,65 @@ 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(
@@ -100,6 +173,8 @@ 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 {
--- a/internal/app/etl/types.go
+++ b/internal/app/etl/types.go
@@ -10,7 +10,7 @@ import (
 )

 type Extractor interface {
-	ProcessPartition(
+	Exec(
 		ctx context.Context,
 		tableInfo config.SourceTableInfo,
 		columns []models.ColumnType,
@@ -19,19 +19,6 @@ 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)
--- a/scripts/az-blob/main.go
+++ b/scripts/az-blob/main.go
@@ -0,0 +1,44 @@
+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()
+}
--- a/scripts/backoff-test/main.go
+++ b/scripts/backoff-test/main.go
@@ -1,58 +0,0 @@
-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()
-}
Author	SHA1	Message	Date
Kylesoda	6ad25e5889	feat: update job configuration for infraestructura_site_holder__attach; enhance storage handling and retry logic	2026-04-22 15:23:19 -05:00
Kylesoda	0ac5f01b65	feat: update configuration handling to use cleanenv; remove unused dependencies and improve error logging	2026-04-22 12:31:31 -05:00
Kylesoda	3b1371a270	feat: integrate Azure storage handling in migration process; update transformers and job processing logic	2026-04-21 14:15:20 -05:00
Kylesoda	bb7b35619a	feat: add ToStorage configuration to JobConfig for enhanced data handling	2026-04-21 13:43:03 -05:00
Kylesoda	cd2efb8692	feat: add new job configuration for red_terminal__attach with source and target definitions	2026-04-21 13:38:11 -05:00
Kylesoda	9964ef819b	feat: refactor migration job to use preSQL and postSQL from TargetTable; update config structure for job definitions	2026-04-21 12:30:40 -05:00
Kylesoda	bd51223855	feat: add truncate query handling in migration process; update job configuration to remove commented truncate SQL	2026-04-21 11:40:02 -05:00
Kylesoda	aa71eeb5c1	feat: enhance range handling in MSSQL and Postgres extractors; update partition range generator logic	2026-04-21 11:32:52 -05:00
Kylesoda	9eb8800864	feat: add range configuration to job and update extractors for inclusive range handling	2026-04-21 11:29:34 -05:00
Kylesoda	09bd364976	feat: implement Azure Blob Storage client and refactor configuration structure	2026-04-21 11:03:56 -05:00
Kylesoda	f2e6edd8fa	feat: add caarlos0/env package for environment variable management and refactor appConfig structure	2026-04-21 10:41:38 -05:00
Kylesoda	c5a18f6d95	chore: update .env.example to set LOG_LEVEL to INFO and add Azure storage configuration variables	2026-04-21 10:15:01 -05:00
Kylesoda	8217b13d08	feat: add azblob client implementation for file uploads	2026-04-21 10:01:42 -05:00
Kylesoda	16c232762e	feat: refactor extractor interface and implement Consume function for ETL process	2026-04-20 00:19:41 -05:00
Kylesoda	b4a846575d	Update .env.example with new variables	2026-04-19 23:08:09 -05:00
Kylesoda	5bd730f026	feat: update .gitignore to include .vscode directory	2026-04-19 23:06:18 -05:00
Kylesoda	7bd80d4180	feat: enhance logging configuration to use dynamic log level from environment variable	2026-04-19 23:06:13 -05:00
Kylesoda	846a49d40c	feat: implement GenericLoader for batch processing and utility functions	2026-04-17 15:58:08 -05:00