chore: avoid empty statement to execute (#39)

Co-authored-by: Rick <[email protected]>

Author: LinuxSuRen

pkg/data_query.go

@@ -104,6 +104,9 @@ func (s *dbserver) Query(ctx context.Context, query *server.DataQuery) (result *
 func runMultilineSQL(ctx context.Context, multilineSQL string, db *gorm.DB) (result *server.DataQueryResult, err error) {
 	lines := strings.Split(multilineSQL, ";")
 	for _, line := range lines {
+		if strings.TrimSpace(line) == "" {
+			continue
+		}
 		if result, err = sqlQuery(ctx, line, db); err != nil {
 			return
 		}

pkg/data_query_test.go

@@ -0,0 +1,45 @@
+/*
+Copyright 2025 API Testing Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package pkg
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRunMultilineSQL(t *testing.T) {
+	tests := []struct {
+		name string
+		sql  string
+	}{
+		{
+			name: "empty",
+			sql:  "",
+		}, {
+			name: "multiple blanks",
+			sql:  "  ; ",
+		},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			result, err := runMultilineSQL(context.TODO(), test.sql, nil)
+			assert.NoError(t, err)
+			assert.Nil(t, result)
+		})
+	}
+}