CreateQuery bitmap_column_expr_test2 (children 3)
 Identifier bitmap_column_expr_test2
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration tag_id (children 1)
    DataType String
   ColumnDeclaration z (children 1)
    DataType AggregateFunction (children 1)
     ExpressionList (children 2)
      Identifier groupBitmap
      DataType UInt32
 Storage definition (children 2)
  Function MergeTree
  Identifier tag_id