CreateQuery a (children 3)
 Identifier a
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration number (children 1)
    DataType UInt64
 Storage definition (children 2)
  Function MergeTree
  Function if (children 1)
   ExpressionList (children 3)
    Function greater (children 1)
     ExpressionList (children 2)
      Function now (children 1)
       ExpressionList
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal \'2020-06-01 13:31:40\'
    Function toInt64 (children 1)
     ExpressionList (children 1)
      Identifier number
    Function negate (children 1)
     ExpressionList (children 1)
      Identifier number
