storing_auto_thd.h

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#ifndef STORING_AUTO_THD_H
#define STORING_AUTO_THD_H
 
#include <sql/auto_thd.h>
#include <sql/current_thd.h>
#include <sql/sql_lex.h>
#include <sql/sql_thd_internal_api.h>
#include "sql/auth/auth_acls.h"
 
THD *create_internal_thd_ctx(Sctx_ptr<Security_context> &ctx);
void destroy_internal_thd_ctx(THD *thd, Sctx_ptr<Security_context> &ctx);
 
/**
  A version of Auto_THD that:
   - doesn't catch or print the error onto the error log but just passes it up
   - stores and restores the current_thd correctly
*/
class Storing_auto_THD {
  THD *m_previous_thd, *thd;
  Sctx_ptr<Security_context> ctx;
 
 public:
  Storing_auto_THD() {
    m_previous_thd = current_thd;
    /* Allocate thread local memory if necessary. */
    if (!m_previous_thd) {
      my_thread_init();
    }
    thd = create_internal_thd_ctx(ctx);
  }
 
  ~Storing_auto_THD() {
    if (m_previous_thd) {
      Diagnostics_area *prev_da = m_previous_thd->get_stmt_da();
      Diagnostics_area *curr_da = thd->get_stmt_da();
      /* We need to put any errors in the DA as well as the condition list. */
      if (curr_da->is_error())
        prev_da->set_error_status(curr_da->mysql_errno(),
                                  curr_da->message_text(),
                                  curr_da->returned_sqlstate());
 
      prev_da->copy_sql_conditions_from_da(m_previous_thd, curr_da);
    }
    destroy_internal_thd_ctx(thd, ctx);
    if (!m_previous_thd) {
      my_thread_end();
    }
    if (m_previous_thd) {
      m_previous_thd->store_globals();
    }
  }
  THD *get_THD() { return thd; }
};
 
#endif /* STORING_AUTO_THD_H */