sql_xa_start.h

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#ifndef XA_SQL_CMD_XA_START
#define XA_SQL_CMD_XA_START
 
#include "sql/sql_cmd.h"  // Sql_cmd
#include "sql/xa.h"       // xid_t
 
/**
  @class Sql_cmd_xa_start
 
  This class represents the `XA START ...` SQL statement which starts an XA
  transaction with the given xid value.
 
  @see Sql_cmd
*/
class Sql_cmd_xa_start : public Sql_cmd {
 public:
  /**
    Class constructor.
 
    @param xid_arg XID of the XA transacation about to start
    @param xa_option Additional options for the `XA START` command
   */
  Sql_cmd_xa_start(xid_t *xid_arg, enum xa_option_words xa_option);
  virtual ~Sql_cmd_xa_start() override = default;
 
  /**
    Retrieves the SQL command code for this class, `SQLCOM_XA_START`.
 
    @see Sql_cmd::sql_command_code
 
    @return The SQL command code for this class, `SQLCOM_XA_START`.
   */
  enum_sql_command sql_command_code() const override;
  /**
    Executes the SQL command.
 
    @see Sql_cmd::execute
 
    @param thd The `THD` session object within which the command is being
               executed.
 
    @return false if the execution is successful, true otherwise.
   */
  bool execute(THD *thd) override;
 
 private:
  /** The XID associated with the underlying XA transaction. */
  xid_t *m_xid;
  /** Options associated with the underlying `XA START`  */
  enum xa_option_words m_xa_opt;
 
  /**
    Start a XA transaction with the given xid value.
 
    @param thd    Current thread
 
    @retval false  Success
    @retval true   Failure
  */
  bool trans_xa_start(THD *thd);
};
 
#endif  // XA_SQL_CMD_XA_START