Method vers_setup_conds

sql/sql_select.cc:1199–1376

}

int SELECT_LEX::vers_setup_conds(THD *thd, TABLE_LIST *tables)
{
  DBUG_ENTER("SELECT_LEX::vers_setup_conds");
  const bool update_conds= !skip_setup_conds(thd);

  if (!versioned_tables)
  {
    for (TABLE_LIST *table= tables; table; table= table->next_local)
    {
      if (table->table && table->table->versioned())
        versioned_tables++;
      else if (table->vers_conditions.is_set() &&
              (table->is_non_derived() || !table->vers_conditions.used))
      {
        my_error(ER_VERS_NOT_VERSIONED, MYF(0), table->alias.str);
        DBUG_RETURN(-1);
      }
    }
  }

  if (versioned_tables == 0)
    DBUG_RETURN(0);

  /* For prepared statements we create items on statement arena,
     because they must outlive execution phase for multiple executions. */
  Query_arena_stmt on_stmt_arena(thd);

  // find outer system_time
  SELECT_LEX *outer_slex= outer_select();
  TABLE_LIST* outer_table= NULL;

  if (outer_slex)
  {
    TABLE_LIST* derived= master_unit()->derived;
    // inner SELECT may not be a derived table (derived == NULL)
    while (derived && outer_slex && !derived->vers_conditions.is_set())
    {
      derived= outer_slex->master_unit()->derived;
      outer_slex= outer_slex->outer_select();
    }
    if (derived && outer_slex)
    {
      DBUG_ASSERT(derived->vers_conditions.is_set());
      outer_table= derived;
    }
  }

  bool is_select= false;
  bool use_sysvar= false;
  switch (thd->lex->sql_command)
  {
  case SQLCOM_SELECT:
    use_sysvar= true;
    /* fall through */
  case SQLCOM_CREATE_TABLE:
  case SQLCOM_INSERT_SELECT:
  case SQLCOM_REPLACE_SELECT:
  case SQLCOM_DELETE_MULTI: