InsertQuery   (children 2)
 Identifier t
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 1)
     Function if (children 1)
      ExpressionList (children 3)
       Function less (children 1)
        ExpressionList (children 2)
         Identifier number
         Literal UInt64_20
       Literal UInt64_0
       Literal UInt64_1
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function numbers (children 1)
        ExpressionList (children 1)
         Literal UInt64_50
