CreateQuery decrypt_null (children 3)
 Identifier decrypt_null
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration dt (children 1)
    DataType DateTime
   ColumnDeclaration user_id (children 1)
    DataType UInt32
   ColumnDeclaration encrypted (children 1)
    DataType String
   ColumnDeclaration iv (children 1)
    DataType String
 Storage definition (children 1)
  Function Memory