CreateQuery map_test (children 3)
 Identifier map_test
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration tags (children 1)
    DataType Map (children 1)
     ExpressionList (children 2)
      DataType String
      DataType String
 Storage definition (children 4)
  Function MergeTree
  Identifier tags
  Identifier tags
  Set