更新客户端适配性问题

server/unified-management/internal/db/store_test.go

@@ -138,6 +138,51 @@ func TestOpenRecordsCurrentSchemaVersion(t *testing.T) {
 	}
 }
 
+func TestSchemaIndexStatementsAreDialectAware(t *testing.T) {
+	mysql := dialectFor("mysql")
+	sqlite := dialectFor("sqlite")
+	for _, statement := range schemaStatements(mysql) {
+		if strings.Contains(strings.ToUpper(statement), "CREATE INDEX IF NOT EXISTS") {
+			t.Fatalf("mysql schema statement contains unsupported index syntax: %s", statement)
+		}
+	}
+
+	index := schemaIndexes()[0]
+	mysqlStatement := createIndexStatement(mysql, index)
+	if strings.Contains(strings.ToUpper(mysqlStatement), "IF NOT EXISTS") {
+		t.Fatalf("mysql index statement contains unsupported syntax: %s", mysqlStatement)
+	}
+	if !strings.Contains(createIndexStatement(sqlite, index), "IF NOT EXISTS") {
+		t.Fatalf("sqlite index statement should remain idempotent")
+	}
+}
+
+func TestMigrateCreatesSQLiteIndexesIdempotently(t *testing.T) {
+	root := t.TempDir()
+	conn, err := sql.Open("sqlite", filepath.Join(root, "indexes.sqlite"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer conn.Close()
+
+	store := &Store{}
+	d := dialectFor("sqlite")
+	if err := store.migrate(conn, d); err != nil {
+		t.Fatal(err)
+	}
+	if err := store.migrate(conn, d); err != nil {
+		t.Fatal(err)
+	}
+
+	var name string
+	if err := conn.QueryRow(`SELECT name FROM sqlite_master WHERE type = 'index' AND name = ?`, "idx_feedback_tickets_activity").Scan(&name); err != nil {
+		t.Fatal(err)
+	}
+	if name != "idx_feedback_tickets_activity" {
+		t.Fatalf("unexpected index name %q", name)
+	}
+}
+
 func TestChangeAdminPasswordPersistsWhenRemoteSyncFails(t *testing.T) {
 	root := t.TempDir()
 	path := filepath.Join(root, "unified.sqlite")