RowsAffected on mysql is incorrect

go.mod

@@ -1,39 +1,39 @@
 module gorm.io/playground
 
-go 1.22.0
+go 1.23.0
 
 toolchain go1.23.3
 
 require (
 	gorm.io/driver/mysql v1.5.7
-	gorm.io/driver/postgres v1.5.10
-	gorm.io/driver/sqlite v1.5.6
+	gorm.io/driver/postgres v1.5.11
+	gorm.io/driver/sqlite v1.5.7
 	gorm.io/driver/sqlserver v1.5.4
 	gorm.io/gen v0.3.26
 	gorm.io/gorm v1.25.12
 )
 
 require (
 	filippo.io/edwards25519 v1.1.0 // indirect
-	github.com/go-sql-driver/mysql v1.8.1 // indirect
+	github.com/go-sql-driver/mysql v1.9.0 // indirect
 	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/pgx/v5 v5.7.1 // indirect
+	github.com/jackc/pgx/v5 v5.7.2 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/mattn/go-sqlite3 v1.14.24 // indirect
-	github.com/microsoft/go-mssqldb v1.7.2 // indirect
-	golang.org/x/crypto v0.29.0 // indirect
-	golang.org/x/mod v0.22.0 // indirect
-	golang.org/x/sync v0.9.0 // indirect
-	golang.org/x/sys v0.27.0 // indirect
-	golang.org/x/text v0.20.0 // indirect
-	golang.org/x/tools v0.27.0 // indirect
-	gorm.io/datatypes v1.2.4 // indirect
+	github.com/microsoft/go-mssqldb v1.8.0 // indirect
+	golang.org/x/crypto v0.36.0 // indirect
+	golang.org/x/mod v0.24.0 // indirect
+	golang.org/x/sync v0.12.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
+	golang.org/x/text v0.23.0 // indirect
+	golang.org/x/tools v0.31.0 // indirect
+	gorm.io/datatypes v1.2.5 // indirect
 	gorm.io/hints v1.1.2 // indirect
 	gorm.io/plugin/dbresolver v1.5.3 // indirect
 )

main_test.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"testing"
+
+	"gorm.io/gorm"
 )
 
 // GORM_REPO: https://github.com/go-gorm/gorm.git
@@ -18,3 +20,49 @@ func TestGORM(t *testing.T) {
 		t.Errorf("Failed, got error: %v", err)
 	}
 }
+
+func TestIncorrectRowsAffected(t *testing.T) {
+	user := User{Name: "jinzhu2", Age: 25, Active: true}
+	DB.Create(&user)
+	user = User{Name: "jinzhu3", Age: 25, Active: true}
+	DB.Create(&user)
+	user = User{Name: "jinzhu4", Age: 25, Active: true}
+	DB.Create(&user)
+
+	condition := gorm.Expr("users.age = ? AND active = ?", 25, true)
+	res := DB.Exec(`UPDATE users SET birthday = '2025-03-07' WHERE ?`, condition)
+	t.Logf("res.RowsAffected - Expected = 3, Actual = %d", res.RowsAffected)
+	if res.RowsAffected != 3 {
+		t.Fail()
+	}
+	condition2 := gorm.Expr("users.age = ? AND active = ? AND company_id IS NULL", 25, true)
+	res2 := DB.Exec(`UPDATE users SET birthday = '2025-03-07' WHERE ?`, condition2)
+	t.Logf("res.RowsAffected - Expected = 3, Actual = %d", res2.RowsAffected)
+	if res2.RowsAffected != 3 {
+		t.Fail()
+	}
+	DB.Exec(`DELETE FROM users WHERE age = 25`)
+}
+
+func TestIncorrectRowsAffectedReversed(t *testing.T) {
+	user := User{Name: "jinzhu2", Age: 25, Active: true}
+	DB.Create(&user)
+	user = User{Name: "jinzhu3", Age: 25, Active: true}
+	DB.Create(&user)
+	user = User{Name: "jinzhu4", Age: 25, Active: true}
+	DB.Create(&user)
+
+	condition2 := gorm.Expr("users.age = ? AND active = ? AND company_id IS NULL", 25, true)
+	res2 := DB.Exec(`UPDATE users SET birthday = '2025-03-07' WHERE ?`, condition2)
+	t.Logf("res.RowsAffected - Expected = 3, Actual = %d", res2.RowsAffected)
+	if res2.RowsAffected != 3 {
+		t.Fail()
+	}
+	condition := gorm.Expr("users.age = ? AND active = ?", 25, true)
+	res := DB.Exec(`UPDATE users SET birthday = '2025-03-07' WHERE ?`, condition)
+	t.Logf("res.RowsAffected - Expected = 3, Actual = %d", res.RowsAffected)
+	if res.RowsAffected != 3 {
+		t.Fail()
+	}
+	DB.Exec(`DELETE FROM users WHERE age = 25`)
+}