CreateQuery 01851_merge_tree (children 3)
 Identifier 01851_merge_tree
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration n1 (children 1)
    DataType Int8
   ColumnDeclaration n2 (children 1)
    DataType Int8
   ColumnDeclaration n3 (children 1)
    DataType Int8
   ColumnDeclaration n4 (children 1)
    DataType Int8
 Storage definition (children 2)
  Function MergeTree
  Identifier n1
