feat: update chunk size for MSSQL processing and enhance error handling in transformation functions

cmd/go_migrate/mssql-transform.go

@@ -2,27 +2,29 @@ package main
 
 import (
 	"encoding/binary"
+	"errors"
 	"time"
 )
 
-func mssqlUuidToBigEndian(mssqlUuid []byte) []byte {
+func mssqlUuidToBigEndian(mssqlUuid []byte) ([]byte, error) {
 	if len(mssqlUuid) != 16 {
-		return mssqlUuid
+		return nil, errors.New("Invalid uuid")
 	}
+
 	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
+	return pgUuid, nil
 }
 
 const sridFlag = 0x20000000
 
-func wkbToEwkbWithSrid(geometry []byte, srid int) []byte {
+func wkbToEwkbWithSrid(geometry []byte, srid int) ([]byte, error) {
 	if len(geometry) < 5 {
-		return geometry
+		return nil, errors.New("Invalid wkb")
 	}
 
 	var byteOrder binary.ByteOrder
@@ -34,7 +36,7 @@ func wkbToEwkbWithSrid(geometry []byte, srid int) []byte {
 
 	wkbType := byteOrder.Uint32(geometry[1:5])
 	if wkbType&sridFlag != 0 {
-		return geometry
+		return geometry, nil
 	}
 
 	ewkbType := wkbType | sridFlag
@@ -49,7 +51,7 @@ func wkbToEwkbWithSrid(geometry []byte, srid int) []byte {
 
 	copy(result[9:], geometry[5:])
 
-	return result
+	return result, nil
 }
 
 func ensureUTC(t time.Time) time.Time {
@@ -59,3 +61,20 @@ func ensureUTC(t time.Time) time.Time {
 
 	return time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second(), t.Nanosecond(), time.UTC)
 }
+
+func ToInt64(v any) (int64, bool) {
+	switch t := v.(type) {
+	case int:
+		return int64(t), true
+	case int8:
+		return int64(t), true
+	case int16:
+		return int64(t), true
+	case int32:
+		return int64(t), true
+	case int64:
+		return int64(t), true
+	default:
+		return 0, false
+	}
+}