CreateQuery 03006_buffer_overflow_r (children 3)
 Identifier 03006_buffer_overflow_r
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration a (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType Nullable (children 1)
       ExpressionList (children 1)
        DataType String
   ColumnDeclaration c (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 2)
      DataType LowCardinality (children 1)
       ExpressionList (children 1)
        DataType String
      DataType LowCardinality (children 1)
       ExpressionList (children 1)
        DataType String
 Storage definition (children 1)
  Function Memory
