The MySQL Server has a quite simple interface for plugins to create tables inside INFORMATION_SCHEMA. A minimal plugin for creating a table with nothing but a counter might look like this:

static int counter_fill_table(THD *thd, TABLE_LIST *tables, Item *cond)
{
  ulonglong value= 0;
  
  while (1)
  {
    table->field[0]->store(value++, true);
  }
  
  return 0;
}

static ST_FIELD_INFO counter_table_fields[]=
{
  {"COUNT", 20, MYSQL_TYPE_LONGLONG, 0, MY_I_S_UNSIGNED, 0, 0},
  {0, 0, MYSQL_TYPE_NULL, 0, 0, 0, 0}
};

static int counter_table_init(void *ptr)
{
  ST_SCHEMA_TABLE *schema_table= (ST_SCHEMA_TABLE*)ptr;

  schema_table->fields_info= counter_table_fields;
  schema_table->fill_table= counter_fill_table;
  return 0;
}

static struct st_mysql_information_schema counter_table_info =
{

This week there are two big events for the MySQL community: The O'Reilly MySQL Conference and Oracle Collaborate run by the IOUG. At these events our Engineering VP, Tomas Ulin, announced the latest milestone releases for our main products. MySQL 5.6 and MySQL Cluster 7.1 as well as our new Windows Installer. There's lots of cool stuff in there but one feature really excited me: MySQL 5.6 contains a memcache interface for accessing InnoDB tables. This means you can access data stored in MySQL not only using SQL statements but also by using a well established and known noSQL protocol.

This works by having the memcache daemon running as plugin as part of the MySQL server. This daemon can then be configured in three ways: Either