MySQL 9.0.0
Source Code Documentation
sql_xa_recover.h
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23
24#ifndef XA_SQL_CMD_XA_RECOVER
25#define XA_SQL_CMD_XA_RECOVER
26
27#include "sql/sql_cmd.h" // Sql_cmd
28#include "sql/xa.h" // xid_t
29
30/**
31 @class Sql_cmd_xa_recover
32
33 This class represents the `XA RECOVER` SQL statement which returns to a
34 client a list of XID's prepared to a XA commit/rollback.
35
36 @see Sql_cmd
37*/
39 public:
40 /**
41 Class constructor.
42
43 @param print_xid_as_hex Whether or not to print the XID as hexadecimal.
44 */
45 explicit Sql_cmd_xa_recover(bool print_xid_as_hex);
46 virtual ~Sql_cmd_xa_recover() override = default;
47
48 /**
49 Retrieves the SQL command code for this class, `SQLCOM_XA_RECOVER`.
50
51 @see Sql_cmd::sql_command_code
52
53 @return The SQL command code for this class, `SQLCOM_XA_RECOVER`.
54 */
55 enum_sql_command sql_command_code() const override;
56 /**
57 Executes the SQL command.
58
59 @see Sql_cmd::execute
60
61 @param thd The `THD` session object within which the command is being
62 executed.
63
64 @return false if the execution is successful, true otherwise.
65 */
66 bool execute(THD *thd) override;
67
68 private:
69 /** Whether or not the XID should be printed in hexadecimal form. */
71
72 /**
73 Return the list of XID's to a client, the same way SHOW commands do.
74
75 @param thd The `THD` session object within which the command is being
76 executed.
77
78 @retval false Success
79 @retval true Failure
80
81 @note
82 I didn't find in XA specs that an RM cannot return the same XID twice,
83 so trans_xa_recover does not filter XID's to ensure uniqueness.
84 It can be easily fixed later, if necessary.
85 */
86 bool trans_xa_recover(THD *thd);
87 /**
88 Check if the current user has a privilege to perform XA RECOVER.
89
90 @param thd The `THD` session object within which the command is being
91 executed.
92
93 @retval false A user has a privilege to perform XA RECOVER
94 @retval true A user doesn't have a privilege to perform XA RECOVER
95 */
96 bool check_xa_recover_privilege(THD *thd) const;
97};
98
99#endif // XA_SQL_CMD_XA_RECOVER
This class represents the XA RECOVER SQL statement which returns to a client a list of XID's prepared...
Definition: sql_xa_recover.h:38
bool m_print_xid_as_hex
Whether or not the XID should be printed in hexadecimal form.
Definition: sql_xa_recover.h:70
enum_sql_command sql_command_code() const override
Retrieves the SQL command code for this class, SQLCOM_XA_RECOVER.
Definition: sql_xa_recover.cc:36
bool check_xa_recover_privilege(THD *thd) const
Check if the current user has a privilege to perform XA RECOVER.
Definition: sql_xa_recover.cc:83
bool trans_xa_recover(THD *thd)
Return the list of XID's to a client, the same way SHOW commands do.
Definition: sql_xa_recover.cc:48
virtual ~Sql_cmd_xa_recover() override=default
Sql_cmd_xa_recover(bool print_xid_as_hex)
Class constructor.
Definition: sql_xa_recover.cc:33
bool execute(THD *thd) override
Executes the SQL command.
Definition: sql_xa_recover.cc:40
Representation of an SQL command.
Definition: sql_cmd.h:83
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_lexer_thd.h:36
enum_sql_command
Definition: my_sqlcommand.h:46
Representation of an SQL command.