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MySQL 8.4.0
Source Code Documentation
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MySQL 8.4.0
Source Code Documentation
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Class used to recover relay log files. More...
#include <rpl_relay_log_sanitizer.h>
Public Member Functions | |
| Relay_log_sanitizer () | |
| Ctor. More... | |
| ~Relay_log_sanitizer () override=default | |
| Dtor. More... | |
| void | analyze_logs (MYSQL_BIN_LOG &log, bool checksum_validation) |
| Given specific log, performs sanitization. More... | |
| bool | sanitize_log (MYSQL_BIN_LOG &log) |
| Sanitize opened log. More... | |
| void | update_source_position (Master_info *mi) |
| Updates source position if a valid source position has been found whilst reading the relay log files. More... | |
 Public Member Functions inherited from binlog::Log_sanitizer | |
| Log_sanitizer () | |
| Ctor. More... | |
| virtual | ~Log_sanitizer ()=default |
| Dtor. More... | |
| my_off_t | get_valid_pos () const |
| Retrieves the position of the last binlog/relay log event that ended a transaction or position after the RLE/FDE/SE that comes from the source. More... | |
| std::pair< my_off_t, bool > | get_valid_source_pos () const |
| Retrieves the last valid source position of an event in read from the binary log / relay log file, which may be: More... | |
| std::pair< std::string, bool > | get_valid_source_file () const |
| Retrieves the updated name of the binlog source file. More... | |
| bool | is_log_malformed () const |
| Retrieves whether or not the log was correctly processed in full. More... | |
| std::string const & | get_failure_message () const |
| Retrieves the textual representation of the encontered failure, if any. More... | |
| std::string | get_valid_file () const |
| bool | is_log_truncation_needed () const |
| Checks whether a valid sanitized log file needs truncation of the last, partially written transaction or events that cannot be safely read. More... | |
| bool | is_fatal_error () const |
| Checks whether the fatal error occurred during log sanitization (OOM / decompression error which we cannot handle) More... | |
Protected Member Functions | |
| PSI_memory_key & | get_memory_key () const override |
| Function used to obtain memory key for derived classes. More... | |
| Protected Member Functions inherited from binlog::Log_sanitizer | |
| template<class Type_reader > | |
| void | process_logs (Type_reader &reader) |
| This function goes through the opened file and searches for a valid position in a binary log file. More... | |
| template<class Type_reader > | |
| void | process_logs (Type_reader &reader, const std::list< std::string > &list_of_files, MYSQL_BIN_LOG &log) |
| This function goes iterates over the relay log files in the 'list_of_files' container, starting from the most recent one. More... | |
| template<class Type_reader > | |
| void | process_logs (Type_reader &reader, MYSQL_BIN_LOG &log) |
| This function will obtain the list of relay log files using the object of MYSQL_BIN_LOG class and iterate over them to find the last valid position within a relay log file. More... | |
| template<class Type_reader > | |
| bool | process_one_log (Type_reader &reader, const std::string &filename) |
| Reads and validates one log file. More... | |
| void | process_query_event (Query_log_event const &ev) |
Invoked when a Query_log_event is read from the binary log file reader. More... | |
| void | process_xid_event (Xid_log_event const &ev) |
Invoked when a Xid_log_event is read from the binary log file reader. More... | |
| void | process_xa_prepare_event (XA_prepare_log_event const &ev) |
Invoked when a XA_prepare_log_event is read from the binary log file reader. More... | |
| void | process_start () |
Invoked when a BEGIN or an ‘XA START’ is found in a Query_log_event. More... | |
| void | process_commit () |
Invoked when a COMMIT is found in a Query_log_event. More... | |
| void | process_rollback () |
Invoked when a ROLLBACK is found in a Query_log_event. More... | |
| void | process_atomic_ddl (Query_log_event const &ev) |
Invoked when a DDL is found in a Query_log_event. More... | |
| void | process_xa_commit (std::string const &query) |
Invoked when an XA COMMIT is found in a Query_log_event. More... | |
| void | process_xa_rollback (std::string const &query) |
Invoked when an XA ROLLBACK is found in a Query_log_event. More... | |
| void | add_external_xid (std::string const &query, enum_ha_recover_xa_state state) |
| Parses the provided string for an XID and adds it to the externally coordinated transactions map, along side the provided state. More... | |
Additional Inherited Members | |
| Protected Attributes inherited from binlog::Log_sanitizer | |
| bool | m_validation_started {true} |
| Indicates whether validation has started. More... | |
| my_off_t | m_valid_pos {0} |
| Position of the last binlog/relay log event that ended a transaction. More... | |
| my_off_t | m_valid_source_pos {0} |
| Position of the last binlog event that ended a transaction (source position which corresponds to m_valid_pos) More... | |
| std::string | m_valid_source_file {""} |
| Currently processed binlog file set in case source rotation event is encountered. More... | |
| std::string | m_valid_file {""} |
| Last log file containing finished transaction. More... | |
| bool | m_in_transaction {false} |
| Whether or not the event being processed is within a transaction. More... | |
| bool | m_is_malformed {false} |
| Whether or not the binary log is malformed/corrupted or error occurred. More... | |
| bool | m_fatal_error {false} |
| Whether or not the binary log has a fatal error. More... | |
| std::string | m_failure_message {""} |
| Textual representation of the encountered failure. More... | |
| MEM_ROOT | m_mem_root |
| Memory pool to use for the XID lists. More... | |
| Mem_root_allocator< my_xid > | m_set_alloc |
| Memory pool allocator to use with the normal transaction list. More... | |
| Mem_root_allocator< std::pair< const XID, XID_STATE::xa_states > > | m_map_alloc |
| Memory pool allocator to use with the XA transaction list. More... | |
| Xid_commit_list | m_internal_xids |
| List of normal transactions fully written to the binary log. More... | |
| Xa_state_list::list | m_external_xids |
| List of XA transactions and states that appear in the binary log. More... | |
| bool | m_is_log_truncation_needed {false} |
| Information on whether log needs to be truncated, i.e. More... | |
| bool | m_has_valid_pos {false} |
| Indicator on whether a valid position has been found in the log file. More... | |
| bool | m_has_valid_source_pos {false} |
| Indicator on whether a valid source position has been found in the log file. More... | |
| my_off_t | m_last_file_size {0} |
| Last opened file size. More... | |
Class used to recover relay log files.
Recovery of the relay log files is:
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inline |
Ctor.
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overridedefault |
Dtor.
| void rpl::Relay_log_sanitizer::analyze_logs | ( | MYSQL_BIN_LOG & | log, |
| bool | checksum_validation | ||
| ) |
Given specific log, performs sanitization.
Reads log list obtained from the MYSQL_BIN_LOG object and searches for last, fully written transaction. Removes log files that are created after last finished transaction
| log | Handle to MYSQL_BIN_LOG object, which does not need to be open. We need specific functions from the MYSQL_BIN_LOG, e.g. reading of the index file |
| checksum_validation | True if we need to perform relay log file checksum validation |
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inlineoverrideprotectedvirtual |
Function used to obtain memory key for derived classes.
Implements binlog::Log_sanitizer.
| bool rpl::Relay_log_sanitizer::sanitize_log | ( | MYSQL_BIN_LOG & | log | ) |
Sanitize opened log.
| log | Handle to MYSQL_BIN_LOG object, which we will truncate if needed |
| void rpl::Relay_log_sanitizer::update_source_position | ( | Master_info * | mi | ) |
Updates source position if a valid source position has been found whilst reading the relay log files.
| mi | Master_info for the receiver thread. |
1.9.2