InsertQuery   (children 2)
 Function file (children 1)
  ExpressionList (children 3)
   Function concat (children 1)
    ExpressionList (children 2)
     Function database (children 1)
      ExpressionList
     Literal \'_test.csv\'
   Identifier CSV
   Literal \'a Int, b Int DEFAULT 77\'
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 2)
     Identifier number
     Function if (children 1)
      ExpressionList (children 3)
       Function equals (children 1)
        ExpressionList (children 2)
         Function modulo (children 1)
          ExpressionList (children 2)
           Identifier number
           Literal UInt64_2
         Literal UInt64_1
       Literal NULL
       Identifier number
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function numbers (children 1)
        ExpressionList (children 1)
         Literal UInt64_3
