Function set_conversion_functions

sql/sql_prepare.cc:1116–1149

}

static bool
set_conversion_functions(Prepared_statement *stmt, uchar **data)
{
  uchar *read_pos= *data;

  DBUG_ENTER("set_conversion_functions");
  /*
     First execute or types altered by the client, setup the
     conversion routines for all parameters (one time)
   */
  Item_param **it= stmt->param_array;
  Item_param **end= it + stmt->param_count;
  THD *thd= stmt->thd;
  for (; it < end; ++it)
  {
    ushort typecode;

    /*
      stmt_execute_packet_sanity_check has already verified, that there
      are enough data in the packet for data types
    */
    typecode= sint2korr(read_pos);
    read_pos+= 2;
    if (parameter_type_sanity_check(typecode))
    {
      DBUG_RETURN(1);
    }
    (**it).unsigned_flag= MY_TEST(typecode & PARAMETER_FLAG_UNSIGNED);
    (*it)->setup_conversion(thd, (uchar) (typecode & 0xff));
    (*it)->sync_clones();
  }
  *data= read_pos;
  DBUG_RETURN(0);
}


static bool setup_conversion_functions(Prepared_statement *stmt,