CreateQuery test1 (children 2)
 Identifier test1
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration a (children 1)
    DataType String
   ColumnDeclaration nest (children 1)
    DataType Nested (children 1)
     ExpressionList (children 2)
      NameTypePair x (children 1)
       DataType String
      NameTypePair y (children 1)
       DataType String
