diff --git a/internal/db/oracle_applychanges_test.go b/internal/db/oracle_applychanges_test.go
index b06041c..ce7024e 100644
--- a/internal/db/oracle_applychanges_test.go
+++ b/internal/db/oracle_applychanges_test.go
@@ -259,6 +259,72 @@ func TestOracleOpenTransactionExecerUsesPinnedSessionTransactionSQL(t *testing.T
 	}
 }
 
+func TestOracleApplyChangesUsesPinnedSessionTransactionSQL(t *testing.T) {
+	t.Parallel()
+
+	dbConn, state := openOracleRecordingDB(t)
+	oracleDB := &OracleDB{conn: dbConn}
+
+	changes := connection.ChangeSet{
+		Updates: []connection.UpdateRow{{
+			Keys: map[string]interface{}{
+				"ID": 7,
+			},
+			Values: map[string]interface{}{
+				"NAME": "new-name",
+			},
+		}},
+	}
+
+	if err := oracleDB.ApplyChanges("MYCIMLED.EDC_LOG", changes); err != nil {
+		t.Fatalf("ApplyChanges() unexpected error: %v", err)
+	}
+	if got := state.snapshotBeginCalls(); got != 0 {
+		t.Fatalf("expected Oracle ApplyChanges not to call database/sql Begin, got %d", got)
+	}
+	wantExecs := []string{
+		`UPDATE "MYCIMLED"."EDC_LOG" SET "NAME" = :1 WHERE "ID" = :2`,
+		"COMMIT",
+	}
+	if got := state.snapshotExecQueries(); !reflect.DeepEqual(got, wantExecs) {
+		t.Fatalf("expected Oracle ApplyChanges pinned-session execs %#v, got %#v", wantExecs, got)
+	}
+}
+
+func TestOracleApplyChangesRollsBackPinnedSessionOnError(t *testing.T) {
+	t.Parallel()
+
+	dbConn, state := openOracleRecordingDB(t)
+	state.rowsAffected = 0
+	oracleDB := &OracleDB{conn: dbConn}
+
+	changes := connection.ChangeSet{
+		Updates: []connection.UpdateRow{{
+			Keys: map[string]interface{}{
+				"ID": 7,
+			},
+			Values: map[string]interface{}{
+				"NAME": "new-name",
+			},
+		}},
+	}
+
+	err := oracleDB.ApplyChanges("MYCIMLED.EDC_LOG", changes)
+	if err == nil {
+		t.Fatal("expected ApplyChanges to return update row-count error")
+	}
+	if got := state.snapshotBeginCalls(); got != 0 {
+		t.Fatalf("expected Oracle ApplyChanges not to call database/sql Begin, got %d", got)
+	}
+	wantExecs := []string{
+		`UPDATE "MYCIMLED"."EDC_LOG" SET "NAME" = :1 WHERE "ID" = :2`,
+		"ROLLBACK",
+	}
+	if got := state.snapshotExecQueries(); !reflect.DeepEqual(got, wantExecs) {
+		t.Fatalf("expected Oracle ApplyChanges pinned-session rollback execs %#v, got %#v", wantExecs, got)
+	}
+}
+
 func TestOracleApplyChangesReturnsErrorWhenUpdateMatchesNoRows(t *testing.T) {
 	t.Parallel()
 
@@ -357,8 +423,8 @@ func TestOracleApplyChangesNormalizesTemporalStringsForUpdate(t *testing.T) {
 	}
 
 	executions := state.snapshotExecArgs()
-	if len(executions) != 1 {
-		t.Fatalf("期望执行 1 条更新，实际 %d 条", len(executions))
+	if len(executions) == 0 {
+		t.Fatal("期望至少执行 1 条更新，实际没有执行")
 	}
 	args := executions[0]
 	if len(args) != 2 {
@@ -395,8 +461,8 @@ func TestOracleApplyChangesUsesUnquotedRowIDLocator(t *testing.T) {
 	}
 
 	executions := state.snapshotExecQueries()
-	if len(executions) != 1 {
-		t.Fatalf("期望执行 1 条更新，实际 %d 条", len(executions))
+	if len(executions) == 0 {
+		t.Fatal("期望至少执行 1 条更新，实际没有执行")
 	}
 	query := executions[0]
 	if !strings.Contains(query, "ROWID = :2") {
diff --git a/internal/db/oracle_impl.go b/internal/db/oracle_impl.go
index 459bfa0..409e3fa 100644
--- a/internal/db/oracle_impl.go
+++ b/internal/db/oracle_impl.go
@@ -823,7 +823,7 @@ func parseOracleTemporalString(raw string) (time.Time, bool) {
 	return time.Time{}, false
 }
 
-func (o *OracleDB) ApplyChanges(tableName string, changes connection.ChangeSet) error {
+func (o *OracleDB) ApplyChanges(tableName string, changes connection.ChangeSet) (err error) {
 	if o.conn == nil {
 		return fmt.Errorf("连接未打开")
 	}
@@ -833,11 +833,26 @@ func (o *OracleDB) ApplyChanges(tableName string, changes connection.ChangeSet)
 		return err
 	}
 
-	tx, err := o.conn.Begin()
+	ctx := context.Background()
+	conn, err := o.conn.Conn(ctx)
 	if err != nil {
 		return err
 	}
-	defer tx.Rollback()
+	defer func() {
+		if closeErr := conn.Close(); closeErr != nil && err == nil {
+			err = closeErr
+		}
+	}()
+
+	transactionFinished := false
+	defer func() {
+		if transactionFinished {
+			return
+		}
+		if _, rollbackErr := conn.ExecContext(context.Background(), "ROLLBACK"); rollbackErr != nil {
+			logger.Warnf("Oracle 表格编辑事务回滚失败：table=%s err=%v", tableName, rollbackErr)
+		}
+	}()
 
 	quoteIdent := func(name string) string {
 		n := strings.TrimSpace(name)
@@ -888,7 +903,7 @@ func (o *OracleDB) ApplyChanges(tableName string, changes connection.ChangeSet)
 			continue
 		}
 		query := fmt.Sprintf("DELETE FROM %s WHERE %s", qualifiedTable, strings.Join(wheres, " AND "))
-		res, err := tx.Exec(query, args...)
+		res, err := conn.ExecContext(ctx, query, args...)
 		if err != nil {
 			return fmt.Errorf("删除失败：%v", err)
 		}
@@ -921,7 +936,7 @@ func (o *OracleDB) ApplyChanges(tableName string, changes connection.ChangeSet)
 		}
 
 		query := fmt.Sprintf("UPDATE %s SET %s WHERE %s", qualifiedTable, strings.Join(sets, ", "), strings.Join(wheres, " AND "))
-		res, err := tx.Exec(query, args...)
+		res, err := conn.ExecContext(ctx, query, args...)
 		if err != nil {
 			return fmt.Errorf("更新失败：%v", err)
 		}
@@ -949,7 +964,7 @@ func (o *OracleDB) ApplyChanges(tableName string, changes connection.ChangeSet)
 		}
 
 		query := fmt.Sprintf("INSERT INTO %s (%s) VALUES (%s)", qualifiedTable, strings.Join(cols, ", "), strings.Join(placeholders, ", "))
-		res, err := tx.Exec(query, args...)
+		res, err := conn.ExecContext(ctx, query, args...)
 		if err != nil {
 			return fmt.Errorf("插入失败：%v", err)
 		}
@@ -958,7 +973,11 @@ func (o *OracleDB) ApplyChanges(tableName string, changes connection.ChangeSet)
 		}
 	}
 
-	return tx.Commit()
+	if _, err := conn.ExecContext(ctx, "COMMIT"); err != nil {
+		return fmt.Errorf("事务提交失败：%v", err)
+	}
+	transactionFinished = true
+	return nil
 }
 
 func (o *OracleDB) GetAllColumns(dbName string) ([]connection.ColumnDefinitionWithTable, error) {