feat: update chunk size for MSSQL data loading and add utility functions for database operations

cmd/go_migrate/extractor.go

@@ -3,24 +3,31 @@ package main
 import (
 	"context"
 	"database/sql"
+	"time"
 
+	"github.com/jackc/pgx/v5/pgxpool"
 	_ "github.com/microsoft/go-mssqldb"
 	log "github.com/sirupsen/logrus"
 )
 
-type UnknownRowValues []any
+type UnknownRowValues = []any
 
 func extractFromMssql(ctx context.Context, job MigrationJob, columns []ColumnType, chunkSize int, db *sql.DB, out chan<- []UnknownRowValues) error {
 	query := buildExtractQueryMssql(job, columns)
 	log.Debug("Query used to extract data from mssql: ", query)
 
+	queryStartTime := time.Now()
 	rows, err := db.QueryContext(ctx, query)
 	if err != nil {
 		return err
 	}
 	defer rows.Close()
+	log.Debugf("Query executed in %v", time.Since(queryStartTime))
 
 	rowsChunk := make([]UnknownRowValues, 0, chunkSize)
+	totalRowsExtracted := 0
+	chunkCount := 0
+	chunkStartTime := time.Now()
 
 	for rows.Next() {
 		values := make([]any, len(columns))
@@ -34,6 +41,50 @@ func extractFromMssql(ctx context.Context, job MigrationJob, columns []ColumnTyp
 			return err
 		}
 
+		rowsChunk = append(rowsChunk, values)
+		totalRowsExtracted++
+
+		if len(rowsChunk) >= chunkSize {
+			chunkCount++
+			chunkDuration := time.Since(chunkStartTime)
+			rowsPerSec := float64(chunkSize) / chunkDuration.Seconds()
+			log.Infof("Extracted chunk #%d: %d rows in %v (%.0f rows/sec) - Total: %d rows", chunkCount, len(rowsChunk), chunkDuration, rowsPerSec, totalRowsExtracted)
+			out <- rowsChunk
+			rowsChunk = make([]UnknownRowValues, 0, chunkSize)
+			chunkStartTime = time.Now()
+		}
+	}
+
+	if len(rowsChunk) > 0 {
+		chunkCount++
+		chunkDuration := time.Since(chunkStartTime)
+		rowsPerSec := float64(len(rowsChunk)) / chunkDuration.Seconds()
+		log.Infof("Extracted final chunk #%d: %d rows in %v (%.0f rows/sec) - Total: %d rows",
+			chunkCount, len(rowsChunk), chunkDuration, rowsPerSec, totalRowsExtracted)
+		out <- rowsChunk
+	}
+
+	return rows.Err()
+}
+
+func extractFromPostgres(ctx context.Context, job MigrationJob, columns []ColumnType, chunkSize int, db *pgxpool.Pool, out chan<- []UnknownRowValues) error {
+	query := buildExtractQueryPostgres(job, columns)
+	log.Debug("Query used to extract data from postgres: ", query)
+
+	rows, err := db.Query(ctx, query)
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+
+	rowsChunk := make([]UnknownRowValues, 0, chunkSize)
+
+	for rows.Next() {
+		values, err := rows.Values()
+		if err != nil {
+			return err
+		}
+
 		rowsChunk = append(rowsChunk, values)
 
 		if len(rowsChunk) >= chunkSize {

cmd/go_migrate/loader.go

@@ -0,0 +1,136 @@
+package main
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
+	mssql "github.com/microsoft/go-mssqldb"
+	log "github.com/sirupsen/logrus"
+)
+
+func fakeLoader(job MigrationJob, columns []ColumnType, in <-chan [][]any) {
+
+	for rows := range in {
+		log.Debugf("Chunk received, loading data into...")
+
+		for i, rowValues := range rows {
+			if i%100 == 0 {
+				logSampleRow(job, columns, rowValues, fmt.Sprintf("row %d", i))
+			}
+		}
+	}
+}
+
+func loadRowsPostgres(ctx context.Context, job MigrationJob, columns []ColumnType, db *pgxpool.Pool, in <-chan []UnknownRowValues) error {
+	chunkCount := 0
+	totalRowsLoaded := 0
+
+	for rows := range in {
+		chunkStartTime := time.Now()
+		identifier := pgx.Identifier{job.Schema, job.Table}
+		colNames := Map(columns, func(col ColumnType) string {
+			return col.name
+		})
+
+		copyStartTime := time.Now()
+		_, err := db.CopyFrom(
+			ctx,
+			identifier,
+			colNames,
+			pgx.CopyFromRows(rows),
+		)
+
+		if err != nil {
+			return err
+		}
+
+		chunkCount++
+		totalRowsLoaded += len(rows)
+		copyDuration := time.Since(copyStartTime)
+		chunkDuration := time.Since(chunkStartTime)
+		rowsPerSec := float64(len(rows)) / chunkDuration.Seconds()
+
+		log.Infof("Loaded chunk #%d: %d rows in %v (copy: %v, %.0f rows/sec) - Total: %d rows", chunkCount, len(rows), chunkDuration, copyDuration, rowsPerSec, totalRowsLoaded)
+	}
+
+	return nil
+}
+
+func loadRowsMssql(ctx context.Context, job MigrationJob, columns []ColumnType, db *sql.DB, in <-chan []UnknownRowValues) error {
+	chunkCount := 0
+	totalRowsLoaded := 0
+
+	for rows := range in {
+		chunkStartTime := time.Now()
+
+		tx, err := db.BeginTx(ctx, nil)
+		if err != nil {
+			return fmt.Errorf("error starting transaction: %w", err)
+		}
+
+		fullTableName := fmt.Sprintf("[%s].[%s]", job.Schema, job.Table)
+		colNames := Map(columns, func(col ColumnType) string {
+			return col.name
+		})
+
+		stmt, err := tx.PrepareContext(ctx, mssql.CopyIn(fullTableName, mssql.BulkOptions{}, colNames...))
+		if err != nil {
+			tx.Rollback()
+			return fmt.Errorf("error preparing bulk copy statement: %w", err)
+		}
+
+		copyStartTime := time.Now()
+
+		for _, row := range rows {
+			_, err = stmt.ExecContext(ctx, row...)
+			if err != nil {
+				stmt.Close()
+				tx.Rollback()
+				return fmt.Errorf("error executing row insert: %w", err)
+			}
+		}
+
+		result, err := stmt.ExecContext(ctx)
+		if err != nil {
+			stmt.Close()
+			tx.Rollback()
+			return fmt.Errorf("error flushing bulk data: %w", err)
+		}
+
+		err = stmt.Close()
+		if err != nil {
+			tx.Rollback()
+			return fmt.Errorf("error closing statement: %w", err)
+		}
+
+		if err := tx.Commit(); err != nil {
+			return fmt.Errorf("error committing transaction: %w", err)
+		}
+
+		rowsAffected, _ := result.RowsAffected()
+		chunkCount++
+		totalRowsLoaded += int(rowsAffected)
+
+		copyDuration := time.Since(copyStartTime)
+		chunkDuration := time.Since(chunkStartTime)
+		rowsPerSec := float64(len(rows)) / chunkDuration.Seconds()
+
+		log.Infof("Loaded chunk #%d (MSSQL): %d rows in %v (copy: %v, %.0f rows/sec) - Total: %d rows", chunkCount, len(rows), chunkDuration, copyDuration, rowsPerSec, totalRowsLoaded)
+	}
+
+	return nil
+}
+
+func Map[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
+}

cmd/go_migrate/log.go

@@ -10,6 +10,8 @@ func configureLog() {
 	log.SetFormatter(&log.TextFormatter{
 		FullTimestamp:   true,
 		TimestampFormat: time.StampMilli,
+		DisableSorting:  false,
+		PadLevelText:    true,
 	})
-	log.SetLevel(log.DebugLevel)
+	log.SetLevel(log.InfoLevel)
 }

cmd/go_migrate/main.go

@@ -1,6 +1,8 @@
 package main
 
 import (
+	"time"
+
 	log "github.com/sirupsen/logrus"
 )
 
@@ -19,15 +21,17 @@ var migrationJobs []MigrationJob = []MigrationJob{
 }
 
 const (
-	NumExtractors int = 2
-	ChunkSize     int = 20
+	NumExtractors int = 1
+	NumLoaders    int = 4
+	ChunkSize     int = 50000
 	QueueSize     int = 10
 )
 
 func main() {
 	configureLog()
-	log.Info("Starting migration...")
-	// log.Debugf("Migration jobs: %+v", migrationJobs)
+	startTime := time.Now()
+	log.Info("=== Starting migration ===")
+	log.Infof("Number of loaders: %d, Chunk size: %d", NumLoaders, ChunkSize)
 
 	sourceDb, targetDb, connError := connectToDatabases()
 	if connError != nil {
@@ -38,9 +42,11 @@ func main() {
 	defer targetDb.Close()
 
 	for _, job := range migrationJobs {
-		log.Infof("Processing job: %+v", job)
+		log.Infof(">>> Processing job: %s.%s <<<", job.Schema, job.Table)
 		processMigrationJob(sourceDb, targetDb, job)
 	}
 
-	log.Info("Migration completed successfully!")
+	totalDuration := time.Since(startTime)
+	log.Infof("=== Migration completed successfully! ===")
+	log.Infof("Total migration time: %v", totalDuration)
 }

cmd/go_migrate/mssql-transform.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"encoding/binary"
+	"time"
+)
+
+func mssqlUuidToBigEndian(mssqlUuid []byte) []byte {
+	if len(mssqlUuid) != 16 {
+		return mssqlUuid
+	}
+	pgUuid := make([]byte, 16)
+	pgUuid[0], pgUuid[1], pgUuid[2], pgUuid[3] = mssqlUuid[3], mssqlUuid[2], mssqlUuid[1], mssqlUuid[0]
+	pgUuid[4], pgUuid[5] = mssqlUuid[5], mssqlUuid[4]
+	pgUuid[6], pgUuid[7] = mssqlUuid[7], mssqlUuid[6]
+	copy(pgUuid[8:], mssqlUuid[8:])
+
+	return pgUuid
+}
+
+const sridFlag = 0x20000000
+
+func wkbToEwkbWithSrid(geometry []byte, srid int) []byte {
+	if len(geometry) < 5 {
+		return geometry
+	}
+
+	var byteOrder binary.ByteOrder
+	if geometry[0] == 0 {
+		byteOrder = binary.BigEndian
+	} else {
+		byteOrder = binary.LittleEndian
+	}
+
+	wkbType := byteOrder.Uint32(geometry[1:5])
+	if wkbType&sridFlag != 0 {
+		return geometry
+	}
+
+	ewkbType := wkbType | sridFlag
+
+	result := make([]byte, len(geometry)+4)
+
+	result[0] = geometry[0]
+
+	byteOrder.PutUint32(result[1:5], ewkbType)
+
+	byteOrder.PutUint32(result[5:9], uint32(srid))
+
+	copy(result[9:], geometry[5:])
+
+	return result
+}
+
+func ensureUTC(t time.Time) time.Time {
+	if t.Location() == time.UTC {
+		return t
+	}
+
+	return time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second(), t.Nanosecond(), time.UTC)
+}

cmd/go_migrate/process.go

@@ -3,7 +3,8 @@ package main
 import (
 	"context"
 	"database/sql"
-	"fmt"
+	"sync"
+	"time"
 
 	"github.com/jackc/pgx/v5/pgxpool"
 
@@ -12,6 +13,9 @@ import (
 )
 
 func processMigrationJob(sourceDb *sql.DB, targetDb *pgxpool.Pool, job MigrationJob) {
+	jobStartTime := time.Now()
+	log.Infof("Starting migration job: %s.%s [PK: %s]", job.Schema, job.Table, job.PrimaryKey)
+
 	sourceColTypes, targetColTypes, err := GetColumnTypes(sourceDb, targetDb, job)
 	if err != nil {
 		log.Fatal("Unexpected error: ", err)
@@ -21,40 +25,59 @@ func processMigrationJob(sourceDb *sql.DB, targetDb *pgxpool.Pool, job Migration
 	logColumnTypes(targetColTypes, "Target col types")
 
 	chRowsExtract := make(chan []UnknownRowValues, QueueSize)
+	chRowsTransform := make(chan []UnknownRowValues)
+	mssqlCtx := context.Background()
 
-	mssqlContext := context.Background()
-
-	if err := extractFromMssql(mssqlContext, job, sourceColTypes, ChunkSize, sourceDb, chRowsExtract); err != nil {
-		log.Fatal("Unexpected error extrating data from mssql: ", err)
+	go func() {
+		log.Info("Starting extraction from MSSQL...")
+		extractStartTime := time.Now()
+		if err := extractFromMssql(mssqlCtx, job, sourceColTypes, ChunkSize, sourceDb, chRowsExtract); err != nil {
+			log.Error("Unexpected error extracting data from mssql: ", err)
 		}
 		close(chRowsExtract)
+		log.Infof("Extraction completed in %v", time.Since(extractStartTime))
+	}()
 
-	transformRowsMssql(job, sourceColTypes, chRowsExtract)
+	go func() {
+		log.Info("Starting transformation of rows...")
+		transformStartTime := time.Now()
+		transformRowsMssql(sourceColTypes, chRowsExtract, chRowsTransform)
+		close(chRowsTransform)
+		log.Infof("Transformation completed in %v", time.Since(transformStartTime))
+	}()
+
+	var wgPostgresLoaders sync.WaitGroup
+	postgresLoaderCtx := context.Background()
+
+	log.Infof("Starting %d PostgreSQL loader(s)...", NumLoaders)
+	loaderStartTime := time.Now()
+
+	for range NumLoaders {
+		wgPostgresLoaders.Go(func() {
+			if err := loadRowsPostgres(postgresLoaderCtx, job, sourceColTypes, targetDb, chRowsTransform); err != nil {
+				log.Error("Unexpected error loading data into postgres: ", err)
+			}
+		})
+	}
+
+	wgPostgresLoaders.Wait()
+	log.Infof("Loading completed in %v", time.Since(loaderStartTime))
+
+	totalDuration := time.Since(jobStartTime)
+	log.Infof("Migration job completed successfully! Total time: %v", totalDuration)
 }
 
 func logColumnTypes(columnTypes []ColumnType, label string) {
-	log.Info(label)
+	log.Debug(label)
 
 	for _, col := range columnTypes {
-		log.Infof("%+v", col)
-	}
-}
-
-func transformRowsMssql(job MigrationJob, columns []ColumnType, in <-chan []UnknownRowValues) {
-	for rows := range in {
-		log.Debug("Chunk received, transforming...")
-
-		for i, rowValues := range rows {
-			if i%100 == 0 {
-				logSampleRow(job, columns, rowValues, fmt.Sprintf("row %d", i))
-			}
-		}
+		log.Debugf("%+v", col)
 	}
 }
 
 func logSampleRow(job MigrationJob, columns []ColumnType, rowValues UnknownRowValues, tag string) {
 	log.Infof("[%s.%s] Sample row: (%s)", job.Schema, job.Table, tag)
 	for i, col := range columns {
-		log.Infof("%s: %v", col.Name(), rowValues[i])
+		log.Infof("%s (%T): %v", col.Name(), rowValues[i], rowValues[i])
 	}
 }

cmd/go_migrate/transformer.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"time"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func transformRowsMssql(columns []ColumnType, in <-chan []UnknownRowValues, out chan<- []UnknownRowValues) {
+	chunkCount := 0
+	totalRowsTransformed := 0
+
+	for rows := range in {
+		chunkStartTime := time.Now()
+		log.Debugf("Chunk #%d received, transforming %d rows...", chunkCount+1, len(rows))
+
+		for _, rowValues := range rows {
+			for i, col := range columns {
+				value := rowValues[i]
+				if col.SystemType() == "uniqueidentifier" {
+					if b, ok := value.([]byte); ok {
+						rowValues[i] = mssqlUuidToBigEndian(b)
+					}
+				} else if col.SystemType() == "geometry" || col.SystemType() == "geography" {
+					if b, ok := value.([]byte); ok {
+						rowValues[i] = wkbToEwkbWithSrid(b, 4326)
+					}
+				} else if col.SystemType() == "datetime" || col.SystemType() == "datetime2" {
+					if t, ok := value.(time.Time); ok {
+						rowValues[i] = ensureUTC(t)
+					}
+				}
+			}
+		}
+
+		chunkCount++
+		totalRowsTransformed += len(rows)
+		chunkDuration := time.Since(chunkStartTime)
+		rowsPerSec := float64(len(rows)) / chunkDuration.Seconds()
+		log.Infof("Transformed chunk #%d: %d rows in %v (%.0f rows/sec) - Total: %d rows",
+			chunkCount, len(rows), chunkDuration, rowsPerSec, totalRowsTransformed)
+
+		out <- rows
+	}
+}

go.mod

@@ -3,16 +3,18 @@ module git.ksdemosapps.com/kylesoda/go-migrate
 go 1.25.7
 
 require (
+	github.com/gaspardle/go-mssqlclrgeo v0.0.0-20160129143314-97ceabf987a4
+	github.com/google/uuid v1.6.0
 	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
 )
 
 require (
 	github.com/golang-sql/civil v0.0.0-20220223132316-b832511892a9 // indirect
 	github.com/golang-sql/sqlexp v0.1.0 // indirect
-	github.com/google/uuid v1.6.0 // 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

go.sum

@@ -10,9 +10,17 @@ github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/internal v1.2.0 h1:nCYfg
 github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/internal v1.2.0/go.mod h1:ucUjca2JtSZboY8IoUqyQyuuXvwbMBVwFOm0vdQPNhA=
 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/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/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=
+github.com/gaspardle/go-mssqlclrgeo v0.0.0-20160129143314-97ceabf987a4 h1:4vH4+3zfwZTqoJEFw7DsTaH1V8jgVwnyeDvNi2TxzAc=
+github.com/gaspardle/go-mssqlclrgeo v0.0.0-20160129143314-97ceabf987a4/go.mod h1:jlB0I5BIfcJBGdV6rRGPthSBfeY86RGkSAwcsldbHJc=
 github.com/golang-jwt/jwt/v5 v5.3.1 h1:kYf81DTWFe7t+1VvL7eS+jKFVWaUnK9cB1qbwn63YCY=
 github.com/golang-jwt/jwt/v5 v5.3.1/go.mod h1:fxCRLWMO43lRc8nhHWY6LGqRcf+1gQWArsqaEUEa5bE=
 github.com/golang-sql/civil v0.0.0-20220223132316-b832511892a9 h1:au07oEsX2xN0ktxqI+Sida1w446QrXBRJ0nee3SNZlA=
@@ -21,6 +29,8 @@ github.com/golang-sql/sqlexp v0.1.0 h1:ZCD6MBpcuOVfGVqsEmY5/4FtYiKz6tSyUv9LPEDei
 github.com/golang-sql/sqlexp v0.1.0/go.mod h1:J4ad9Vo8ZCWQ2GMrC4UCQy1JpCbwU9m3EOqtpKwwwHI=
 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/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=
@@ -48,6 +58,8 @@ github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UV
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+github.com/twpayne/go-geom v1.6.1 h1:iLE+Opv0Ihm/ABIcvQFGIiFBXd76oBIar9drAwHFhR4=
+github.com/twpayne/go-geom v1.6.1/go.mod h1:Kr+Nly6BswFsKM5sd31YaoWS5PeDDH2NftJTK7Gd028=
 golang.org/x/crypto v0.48.0 h1:/VRzVqiRSggnhY7gNRxPauEQ5Drw9haKdM0jqfcCFts=
 golang.org/x/crypto v0.48.0/go.mod h1:r0kV5h3qnFPlQnBSrULhlsRfryS2pmewsg+XfMgkVos=
 golang.org/x/net v0.51.0 h1:94R/GTO7mt3/4wIKpcR5gkGmRLOuE/2hNGeWq/GBIFo=

scripts/mssql-copy-in/main.go

@@ -0,0 +1,312 @@
+package main
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"math/rand"
+	"sync"
+	"time"
+
+	"github.com/gaspardle/go-mssqlclrgeo"
+	"github.com/google/uuid"
+	mssql "github.com/microsoft/go-mssqldb"
+	log "github.com/sirupsen/logrus"
+	"github.com/twpayne/go-geom"
+	"github.com/twpayne/go-geom/encoding/wkb"
+)
+
+const (
+	totalRows int    = 5_000_000
+	chunkSize int    = 50_000
+	schema    string = "Cartografia"
+	table     string = "MANZANA"
+	queueSize int    = 4
+)
+
+func main() {
+	log.SetFormatter(&log.TextFormatter{
+		FullTimestamp:   true,
+		TimestampFormat: time.StampMilli,
+		DisableSorting:  false,
+		PadLevelText:    true,
+	})
+	log.SetLevel(log.DebugLevel)
+
+	db, connError := connectToSqlServer()
+	if connError != nil {
+		log.Fatal("Connection error: ", connError)
+	}
+	defer db.Close()
+
+	ctx := context.Background()
+
+	maxOid, err := getMaxGDBArchiveOid(ctx, db)
+	if err != nil {
+		log.Fatal("Error getting max GDB_ARCHIVE_OID: ", err)
+	}
+
+	log.Infof("Starting data generation from GDB_ARCHIVE_OID: %d", maxOid+1)
+
+	rowsChan := make(chan []UnknownRowValues, queueSize)
+
+	var wgRowGenerator sync.WaitGroup
+
+	wgRowGenerator.Go(func() {
+		generateManzanaRows(ctx, maxOid, totalRows, chunkSize, rowsChan)
+	})
+
+	columns := []string{
+		"GDB_ARCHIVE_OID",
+		"ID_MANZANA",
+		"ID_DISTRITO",
+		"NOMBRE",
+		"CODIGO",
+		"CANTIDAD_TOTAL",
+		"OCUPACION_RESIDENCIAL",
+		"OCUPACION_NEGOCIO",
+		"OCUPACION_DEPARTAMENTO",
+		"INDICADOR",
+		"FECHA_ALTA",
+		"FECHA_ACT",
+		"Shape",
+		"GDB_GEOMATTR_DATA",
+		"GlobalID",
+		"GDB_FROM_DATE",
+		"GDB_TO_DATE",
+		"OBJECTID",
+	}
+
+	job := MigrationJob{
+		Schema: schema,
+		Table:  table,
+	}
+
+	if err := loadRowsMssql(ctx, job, columns, db, rowsChan); err != nil {
+		log.Fatal("Error loading rows: ", err)
+	}
+
+	log.Info("Data generation and loading completed successfully")
+	wgRowGenerator.Wait()
+}
+
+func loadRowsMssql(ctx context.Context, job MigrationJob, colNames []string, db *sql.DB, in <-chan []UnknownRowValues) error {
+	chunkCount := 0
+	totalRowsLoaded := 0
+
+	for rows := range in {
+		chunkStartTime := time.Now()
+
+		tx, err := db.BeginTx(ctx, nil)
+		if err != nil {
+			return fmt.Errorf("error starting transaction: %w", err)
+		}
+
+		fullTableName := fmt.Sprintf("[%s].[%s]", job.Schema, job.Table)
+
+		stmt, err := tx.PrepareContext(ctx, mssql.CopyIn(fullTableName, mssql.BulkOptions{}, colNames...))
+		if err != nil {
+			tx.Rollback()
+			return fmt.Errorf("error preparing bulk copy statement: %w", err)
+		}
+
+		copyStartTime := time.Now()
+
+		for _, row := range rows {
+			_, err = stmt.ExecContext(ctx, row...)
+			if err != nil {
+				stmt.Close()
+				tx.Rollback()
+				return fmt.Errorf("error executing row insert: %w", err)
+			}
+		}
+
+		result, err := stmt.ExecContext(ctx)
+		if err != nil {
+			stmt.Close()
+			tx.Rollback()
+			return fmt.Errorf("error flushing bulk data: %w", err)
+		}
+
+		err = stmt.Close()
+		if err != nil {
+			tx.Rollback()
+			return fmt.Errorf("error closing statement: %w", err)
+		}
+
+		if err := tx.Commit(); err != nil {
+			return fmt.Errorf("error committing transaction: %w", err)
+		}
+
+		rowsAffected, _ := result.RowsAffected()
+		chunkCount++
+		totalRowsLoaded += int(rowsAffected)
+
+		copyDuration := time.Since(copyStartTime)
+		chunkDuration := time.Since(chunkStartTime)
+		rowsPerSec := float64(len(rows)) / chunkDuration.Seconds()
+
+		log.Infof("Loaded chunk #%d (MSSQL): %d rows in %v (copy: %v, %.0f rows/sec) - Total: %d rows", chunkCount, len(rows), chunkDuration, copyDuration, rowsPerSec, totalRowsLoaded)
+	}
+
+	return nil
+}
+
+func generateRandomPolygonWKB() []byte {
+	minX := rand.Float64()*180 - 90
+	minY := rand.Float64()*180 - 90
+
+	size := 0.01
+
+	coords := []geom.Coord{
+		{minX, minY},
+		{minX + size, minY},
+		{minX + size, minY + size},
+		{minX, minY + size},
+		{minX, minY},
+	}
+
+	polygon := geom.NewPolygon(geom.XY).MustSetCoords([][]geom.Coord{coords})
+
+	polygonWkb, _ := wkb.Marshal(polygon, wkb.NDR)
+
+	return polygonWkb
+}
+
+func getMaxGDBArchiveOid(ctx context.Context, db *sql.DB) (int, error) {
+	var maxOid sql.NullInt64
+
+	query := fmt.Sprintf(`
+		SELECT ISNULL(MAX(GDB_ARCHIVE_OID), 0)
+		FROM [%s].[%s]
+	`, schema, table)
+
+	err := db.QueryRowContext(ctx, query).Scan(&maxOid)
+	if err != nil && err != sql.ErrNoRows {
+		return 0, err
+	}
+
+	if !maxOid.Valid {
+		return 0, nil
+	}
+
+	return int(maxOid.Int64), nil
+}
+
+func generateManzanaRows(
+	ctx context.Context,
+	startOid int,
+	totalRows int,
+	chunkSize int,
+	out chan<- []UnknownRowValues,
+) {
+	defer close(out)
+
+	rowsGenerated := 0
+	currentChunk := make([]UnknownRowValues, 0, chunkSize)
+
+	for i := range totalRows {
+		gdbArchiveOid := startOid + i + 1
+		row := generateManzanaRow(gdbArchiveOid)
+		currentChunk = append(currentChunk, row)
+		rowsGenerated++
+
+		if len(currentChunk) == chunkSize {
+			select {
+			case out <- currentChunk:
+				log.Debugf("Sent chunk with %d rows", len(currentChunk))
+			case <-ctx.Done():
+				log.Info("Context cancelled, stopping row generation")
+				return
+			}
+			currentChunk = make([]UnknownRowValues, 0, chunkSize)
+		}
+
+		if rowsGenerated%100_000 == 0 {
+			logManzanaSampleRow(rowsGenerated, row)
+		}
+	}
+
+	if len(currentChunk) > 0 {
+		select {
+		case out <- currentChunk:
+			log.Debugf("Sent final chunk with %d rows", len(currentChunk))
+		case <-ctx.Done():
+			log.Info("Context cancelled, stopping row generation")
+		}
+	}
+
+	log.Infof("Finished generating %d rows", rowsGenerated)
+}
+
+func generateManzanaRow(gdbArchiveOid int) UnknownRowValues {
+	dateLowerLimit, _ := time.Parse(time.RFC3339, "2020-12-31T23:59:59Z")
+	dateUpperLimit, _ := time.Parse(time.RFC3339, "2025-12-31T23:59:59Z")
+
+	rowID := gdbArchiveOid
+	distrito := fmt.Sprintf("D%d", rand.Intn(100))
+	nombre := generateRandomString(15)
+	codigo := generateRandomString(15)
+	cantidadTotal := rand.Intn(1000)
+	ocupacionResidencial := rand.Intn(1000)
+	ocupacionNegocio := rand.Intn(1000)
+	ocupacionDepartamento := rand.Intn(1000)
+	indicador := rand.Intn(10000)
+	fechaAlta := generateRandomTimestamp(dateLowerLimit, dateUpperLimit)
+	fechaAct := generateRandomTimestamp(dateLowerLimit, dateUpperLimit)
+	shapeWKB := generateRandomPolygonWKB()
+	geoData := []byte{}
+	id := uuid.New()
+	globalID := id[:]
+	gdbFromDate := fechaAct
+	gdbToDate, _ := time.Parse(time.RFC3339, "9999-12-31T23:59:59Z")
+	objectID := gdbArchiveOid
+
+	shapeMssql, err := mssqlclrgeo.WkbToUdtGeo(shapeWKB, false)
+	if err != nil {
+		log.Errorf("Error convirtiendo WKB a formato MSSQL: %v", err)
+		shapeMssql = []byte{}
+	}
+
+	return UnknownRowValues{
+		gdbArchiveOid,
+		rowID,
+		distrito,
+		nombre,
+		codigo,
+		cantidadTotal,
+		ocupacionResidencial,
+		ocupacionNegocio,
+		ocupacionDepartamento,
+		indicador,
+		fechaAlta,
+		fechaAct,
+		shapeMssql,
+		geoData,
+		globalID,
+		gdbFromDate,
+		gdbToDate,
+		objectID,
+	}
+}
+
+func generateRandomTimestamp(min, max time.Time) time.Time {
+	minUnix := min.Unix()
+	maxUnix := max.Unix()
+
+	delta := maxUnix - minUnix
+	secAleatorios := rand.Int63n(delta)
+
+	return time.Unix(minUnix+secAleatorios, 0)
+}
+
+func generateRandomString(maxLength int) string {
+	const charset = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	length := min(rand.Intn(maxLength)+1, maxLength)
+
+	b := make([]byte, length)
+	for i := range b {
+		b[i] = charset[rand.Intn(len(charset))]
+	}
+	return string(b)
+}

scripts/mssql-copy-in/types.go

@@ -0,0 +1,52 @@
+package main
+
+type ColumnType struct {
+	name string
+
+	hasMaxLength      bool
+	hasPrecisionScale bool
+
+	userType    string
+	systemType  string
+	unifiedType string
+	nullable    bool
+	maxLength   int64
+	precision   int64
+	scale       int64
+}
+
+func (c *ColumnType) Name() string {
+	return c.name
+}
+
+func (c *ColumnType) UserType() string {
+	return c.userType
+}
+
+func (c *ColumnType) SystemType() string {
+	return c.systemType
+}
+
+func (c *ColumnType) Length() (length int64, ok bool) {
+	return c.maxLength, c.hasMaxLength
+}
+
+func (c *ColumnType) DecimalSize() (precision, scale int64, ok bool) {
+	return c.precision, c.scale, c.hasPrecisionScale
+}
+
+func (c *ColumnType) Nullable() bool {
+	return c.nullable
+}
+
+func (c *ColumnType) Type() string {
+	return c.unifiedType
+}
+
+type MigrationJob struct {
+	Schema     string
+	Table      string
+	PrimaryKey string
+}
+
+type UnknownRowValues = []any

scripts/mssql-copy-in/utils.go

@@ -0,0 +1,81 @@
+package main
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"time"
+
+	"git.ksdemosapps.com/kylesoda/go-migrate/internal/app/config"
+	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 Map[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 logManzanaSampleRow(id int, rowValues UnknownRowValues) {
+	log.Infof(`
+Sample row #%d:
+GDB_ARCHIVE_OID (%T): %v
+ID_MANZANA (%T): %v
+ID_DISTRITO (%T): %v
+NOMBRE (%T): %v
+CODIGO (%T): %v
+CANTIDAD_TOTAL (%T): %v
+OCUPACION_RESIDENCIAL (%T): %v
+OCUPACION_NEGOCIO (%T): %v
+OCUPACION_DEPARTAMENTO (%T): %v
+INDICADOR (%T): %v
+FECHA_ALTA (%T): %v
+FECHA_ACT (%T): %v
+Shape (%T): %v
+GDB_GEOMATTR_DATA (%T): %v
+GlobalID (%T): %v
+GDB_FROM_DATE (%T): %v
+GDB_TO_DATE (%T): %v
+OBJECTID (%T): %v
+`,
+		id,
+		rowValues[0], rowValues[0],
+		rowValues[1], rowValues[1],
+		rowValues[2], rowValues[2],
+		rowValues[3], rowValues[3],
+		rowValues[4], rowValues[4],
+		rowValues[5], rowValues[5],
+		rowValues[6], rowValues[6],
+		rowValues[7], rowValues[7],
+		rowValues[8], rowValues[8],
+		rowValues[9], rowValues[9],
+		rowValues[10], rowValues[10],
+		rowValues[11], rowValues[11],
+		rowValues[12], rowValues[12],
+		rowValues[13], rowValues[13],
+		rowValues[14], rowValues[14],
+		rowValues[15], rowValues[15],
+		rowValues[16], rowValues[16],
+		rowValues[17], rowValues[17],
+	)
+}

scripts/wkb-to-ewkb/main.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"encoding/binary"
+	"fmt"
+)
+
+const sridFlag = 0x20000000
+
+func wkbToEwkbWithSrid(geometry []byte, srid int) []byte {
+	if len(geometry) < 5 {
+		return geometry
+	}
+
+	var byteOrder binary.ByteOrder
+	if geometry[0] == 0 {
+		byteOrder = binary.BigEndian
+	} else {
+		byteOrder = binary.LittleEndian
+	}
+
+	wkbType := byteOrder.Uint32(geometry[1:5])
+	if wkbType&sridFlag != 0 {
+		return geometry
+	}
+
+	ewkbType := wkbType | sridFlag
+
+	result := make([]byte, len(geometry)+4)
+
+	result[0] = geometry[0]
+
+	byteOrder.PutUint32(result[1:5], ewkbType)
+
+	byteOrder.PutUint32(result[5:9], uint32(srid))
+
+	copy(result[9:], geometry[5:])
+
+	return result
+}
+
+func main() {
+	shape := []byte{
+		1, 3, 0, 0, 0, 1, 0, 0, 0, 5, 0, 0, 0, 217, 61, 121, 88, 168, 57, 83, 192,
+		60, 78, 209, 145, 92, 222, 39, 192, 232, 106, 43, 246, 151, 57, 83, 192,
+		60, 78, 209, 145, 92, 222, 39, 192, 232, 106, 43, 246, 151, 57, 83, 192,
+		174, 182, 98, 127, 217, 221, 39, 192, 217, 61, 121, 88, 168, 57, 83, 192,
+		174, 182, 98, 127, 217, 221, 39, 192, 217, 61, 121, 88, 168, 57, 83, 192,
+		60, 78, 209, 145, 92, 222, 39, 192,
+	}
+
+	srid := 4326
+	result := wkbToEwkbWithSrid(shape, srid)
+
+	fmt.Printf("WKB Original (len): %d\n", len(shape))
+	fmt.Printf("EWKB Result   (len): %d\n", len(result))
+	fmt.Printf("Primeros bytes (original): %v\n", shape[:10])
+	fmt.Printf("Primeros bytes (resultado): %v\n", result[:10])
+}