CreateQuery t1 (children 3)
 Identifier t1
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration c1 (children 1)
    DataType Int32
   ColumnDeclaration c2 (children 1)
    DataType Int32
 Storage definition (children 2)
  Function MergeTree
  Identifier c1
