Flashback

As we have seen in a previous chapter, a storage engine needs to declare a plugin and an initialization function that fills a handlerton structure. Again, the only handlerton method that we need here is a create() method.

#include "ha_html.h"
static handler* html_create_handler(handlerton *hton,
TABLE_SHARE *table, MEM_ROOT *mem_root)
{
return new (mem_root) ha_html(hton, table);
}
static int html_init(void *p)
{
handlerton *html_hton = (handlerton *)p;
html_hton->create = html_create_handler;
return 0;
}
struct st_mysql_storage_engine html_storage_engine =
{ MYSQL_HANDLERTON_INTERFACE_VERSION };
mysql_declare_plugin(html)
{
MYSQL_STORAGE_ENGINE_PLUGIN,
&html_storage_engine,
"HTML",
"Sergei Golubchik",
"An example HTML storage engine",
PLUGIN_LICENSE_GPL,
html_init,
NULL,
0x0001,
NULL,
NULL,
NULL
}
mysql_declare_plugin_end;

Now we need to implement all of the required handler class methods, as described in the previous chapter. Let's start with simple ones:

const char...