CreateQuery t1 (children 3)
 Identifier t1
 Columns definition (children 2)
  ExpressionList (children 3)
   ColumnDeclaration c1 (children 2)
    DataType DateTime
    Function now (children 1)
     ExpressionList
   ColumnDeclaration c2 (children 2)
    DataType DateTime
    Function now (children 1)
     ExpressionList
   ColumnDeclaration c3 (children 2)
    DataType DateTime
    Function now (children 1)
     ExpressionList
  Function tuple (children 1)
   ExpressionList (children 3)
    Identifier c1
    Identifier c2
    Identifier c3
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Function tuple (children 1)
   ExpressionList (children 3)
    Identifier c1
    Identifier c2
    Identifier c3
