fix(chstorage): validate table name before creation

internal/chstorage/schema.go

@@ -17,6 +17,32 @@ type Tables struct {
 	Labels string
 }
 
+// Validate checks table names
+func (t Tables) Validate() error {
+	validateTableName := func(name string) error {
+		if name == "" {
+			return errors.New("table name must be non-empty")
+		}
+		return nil
+	}
+
+	for _, table := range []struct {
+		name      string
+		fieldName string
+	}{
+		{t.Spans, "Spans"},
+		{t.Tags, "Tags"},
+
+		{t.Points, "Points"},
+		{t.Labels, "Labels"},
+	} {
+		if err := validateTableName(table.name); err != nil {
+			return errors.Wrapf(err, "table %s", table.fieldName)
+		}
+	}
+	return nil
+}
+
 var defaultTables = Tables{
 	Spans: "traces_spans",
 	Tags:  "traces_tags",
@@ -31,6 +57,10 @@ type chClient interface {
 
 // Create creates tables.
 func (t Tables) Create(ctx context.Context, c chClient) error {
+	if err := t.Validate(); err != nil {
+		return errors.Wrap(err, "validate")
+	}
+
 	type schema struct {
 		name  string
 		query string