fix test

Author: takaidohigasi

dumpling/export/string_chunking_test.go

@@ -290,15 +290,15 @@ func TestLowerBoundQueryLimitClause(t *testing.T) {
 	boundary := []string{"m10005594745"}
 
 	whereClause := buildLowerBoundWhereClause(columnNames, boundary)
-	expected := "`item_id` > 'm10005594745'"
+	expected := "`item_id` >= 'm10005594745'"
 	require.Equal(t, expected, whereClause, "Single column lower bound should generate correct WHERE clause")
 
 	// Test composite key lower bound (the scenario from the issue)
 	columnNames = []string{"item_id", "photo_index"}
 	boundary = []string{"m10005594745", "9"}
 
 	whereClause = buildLowerBoundWhereClause(columnNames, boundary)
-	expected = "`item_id` > 'm10005594745' OR (`item_id` = 'm10005594745' AND `photo_index` > '9')"
+	expected = "`item_id` > 'm10005594745' OR (`item_id` = 'm10005594745' AND `photo_index` >= '9')"
 	require.Equal(t, expected, whereClause, "Composite key lower bound should generate correct WHERE clause")
 
 	// Test that boundary-first approach with cursor-based sampling is optimal