CreateQuery test1 (children 3)
 Identifier test1
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration a (children 1)
    DataType Int
   ColumnDeclaration b (children 1)
    DataType Int
   ColumnDeclaration c (children 1)
    DataType int
   ColumnDeclaration d (children 1)
    DataType int
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier a
