CreateQuery t_map (children 3)
 Identifier t_map
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration m (children 1)
    DataType Map (children 1)
     ExpressionList (children 2)
      DataType String
      DataType UInt32
 Storage definition (children 3)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
  Set