CreateQuery map_json (children 2)
 Identifier map_json
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration m1 (children 1)
    DataType Map (children 1)
     ExpressionList (children 2)
      DataType String
      DataType UInt64
   ColumnDeclaration m2 (children 1)
    DataType Map (children 1)
     ExpressionList (children 2)
      DataType UInt32
      DataType UInt32
   ColumnDeclaration m3 (children 1)
    DataType Map (children 1)
     ExpressionList (children 2)
      DataType Date
      DataType String
