CreateQuery lc_big_dict (children 3)
 Identifier lc_big_dict
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration str (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 3)
  Function MergeTree
  Identifier str
  Set