InsertQuery   (children 2)
 Function file (children 1)
  ExpressionList (children 1)
   Literal \'02841.parquet\'
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 7)
     Identifier number
     Function if (alias sometimes_null) (children 1)
      ExpressionList (children 3)
       Function equals (children 1)
        ExpressionList (children 2)
         Function modulo (children 1)
          ExpressionList (children 2)
           Identifier number
           Literal UInt64_234
         Literal UInt64_0
       Literal NULL
       Identifier number
     Function toNullable (alias never_null) (children 1)
      ExpressionList (children 1)
       Identifier number
     Function if (alias mostly_null) (children 1)
      ExpressionList (children 3)
       Function equals (children 1)
        ExpressionList (children 2)
         Function modulo (children 1)
          ExpressionList (children 2)
           Identifier number
           Literal UInt64_345
         Literal UInt64_0
       Function CAST (children 1)
        ExpressionList (children 2)
         Identifier number
         Literal \'String\'
       Literal NULL
     Function toLowCardinality (alias sometimes_null_lc) (children 1)
      ExpressionList (children 1)
       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_234
           Literal UInt64_0
         Literal NULL
         Identifier number
     Function toLowCardinality (alias never_null_lc) (children 1)
      ExpressionList (children 1)
       Function toNullable (children 1)
        ExpressionList (children 1)
         Identifier number
     Function toLowCardinality (alias mostly_null_lc) (children 1)
      ExpressionList (children 1)
       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_345
           Literal UInt64_0
         Function CAST (children 1)
          ExpressionList (children 2)
           Identifier number
           Literal \'String\'
         Literal NULL
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function numbers (children 1)
        ExpressionList (children 1)
         Literal UInt64_1000
