log_event.h
上传用户:tsgydb
上传日期:2007-04-14
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文件大小:12k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #ifndef _LOG_EVENT_H
- #define _LOG_EVENT_H
- #ifdef __EMX__
- #undef write // remove pthread.h macro definition, conflict with write() class member
- #endif
- #if defined(__GNUC__) && !defined(MYSQL_CLIENT)
- #pragma interface /* gcc class implementation */
- #endif
- #define LOG_READ_EOF -1
- #define LOG_READ_BOGUS -2
- #define LOG_READ_IO -3
- #define LOG_READ_MEM -5
- #define LOG_READ_TRUNC -6
- #define LOG_READ_TOO_LARGE -7
- #define LOG_EVENT_OFFSET 4
- #define BINLOG_VERSION 1
- #define LOG_EVENT_HEADER_LEN 13
- #define QUERY_HEADER_LEN (sizeof(uint32) + sizeof(uint32) +
- sizeof(uchar) + sizeof(uint16))
- #define LOAD_HEADER_LEN (sizeof(uint32) + sizeof(uint32) +
- + sizeof(uint32) + 2 + sizeof(uint32))
- #define EVENT_LEN_OFFSET 9
- #define EVENT_TYPE_OFFSET 4
- #define QUERY_EVENT_OVERHEAD (LOG_EVENT_HEADER_LEN+QUERY_HEADER_LEN)
- #define ROTATE_EVENT_OVERHEAD LOG_EVENT_HEADER_LEN
- #define LOAD_EVENT_OVERHEAD (LOG_EVENT_HEADER_LEN+LOAD_HEADER_LEN+sizeof(sql_ex_info))
- #define BINLOG_MAGIC "xfex62x69x6e"
- enum Log_event_type { START_EVENT = 1, QUERY_EVENT =2,
- STOP_EVENT=3, ROTATE_EVENT = 4, INTVAR_EVENT=5,
- LOAD_EVENT=6};
- enum Int_event_type { INVALID_INT_EVENT = 0, LAST_INSERT_ID_EVENT = 1, INSERT_ID_EVENT = 2
- };
- #ifndef MYSQL_CLIENT
- class String;
- #endif
- extern uint32 server_id;
- class Log_event
- {
- public:
- time_t when;
- ulong exec_time;
- int valid_exec_time; // if false, the exec time setting is bogus
- uint32 server_id;
- static void *operator new(size_t size)
- {
- return (void*) my_malloc((uint)size, MYF(MY_WME|MY_FAE));
- }
- static void operator delete(void *ptr, size_t size)
- {
- my_free((gptr) ptr, MYF(MY_WME|MY_ALLOW_ZERO_PTR));
- }
-
- int write(IO_CACHE* file);
- int write_header(IO_CACHE* file);
- virtual int write_data(IO_CACHE* file __attribute__((unused))) { return 0; }
- virtual Log_event_type get_type_code() = 0;
- Log_event(time_t when_arg, ulong exec_time_arg = 0,
- int valid_exec_time_arg = 0, uint32 server_id_arg = 0):
- when(when_arg), exec_time(exec_time_arg),
- valid_exec_time(valid_exec_time_arg)
- {
- server_id = server_id_arg ? server_id_arg : (::server_id);
- }
- Log_event(const char* buf): valid_exec_time(0)
- {
- when = uint4korr(buf);
- server_id = uint4korr(buf + 5);
- }
- virtual ~Log_event() {}
- virtual int get_data_size() { return 0;}
- virtual void print(FILE* file, bool short_form = 0) = 0;
- void print_timestamp(FILE* file, time_t *ts = 0);
- void print_header(FILE* file);
- // if mutex is 0, the read will proceed without mutex
- static Log_event* read_log_event(IO_CACHE* file, pthread_mutex_t* log_lock);
- static Log_event* read_log_event(const char* buf, int event_len);
- #ifndef MYSQL_CLIENT
- static int read_log_event(IO_CACHE* file, String* packet,
- pthread_mutex_t* log_lock);
- #endif
-
- };
- class Query_log_event: public Log_event
- {
- protected:
- char* data_buf;
- public:
- const char* query;
- const char* db;
- uint32 q_len; // if we already know the length of the query string
- // we pass it here, so we would not have to call strlen()
- // otherwise, set it to 0, in which case, we compute it with strlen()
- uint32 db_len;
- uint16 error_code;
- ulong thread_id;
- #if !defined(MYSQL_CLIENT)
- THD* thd;
- bool cache_stmt;
- Query_log_event(THD* thd_arg, const char* query_arg, bool using_trans=0):
- Log_event(thd_arg->start_time,0,1,thd_arg->server_id), data_buf(0),
- query(query_arg), db(thd_arg->db), q_len(thd_arg->query_length),
- error_code(thd_arg->net.last_errno),
- thread_id(thd_arg->thread_id), thd(thd_arg),
- cache_stmt(using_trans &&
- (thd_arg->options & (OPTION_NOT_AUTO_COMMIT | OPTION_BEGIN)))
- {
- time_t end_time;
- time(&end_time);
- exec_time = (ulong) (end_time - thd->start_time);
- db_len = (db) ? (uint32) strlen(db) : 0;
- }
- #endif
- Query_log_event(IO_CACHE* file, time_t when, uint32 server_id_arg);
- Query_log_event(const char* buf, int event_len);
- ~Query_log_event()
- {
- if (data_buf)
- {
- my_free((gptr) data_buf, MYF(0));
- }
- }
- Log_event_type get_type_code() { return QUERY_EVENT; }
- int write(IO_CACHE* file);
- int write_data(IO_CACHE* file); // returns 0 on success, -1 on error
- int get_data_size()
- {
- return q_len + db_len + 2 +
- sizeof(uint32) // thread_id
- + sizeof(uint32) // exec_time
- + sizeof(uint16) // error_code
- ;
- }
- void print(FILE* file, bool short_form = 0);
- };
- #define DUMPFILE_FLAG 0x1
- #define OPT_ENCLOSED_FLAG 0x2
- #define REPLACE_FLAG 0x4
- #define IGNORE_FLAG 0x8
- #define FIELD_TERM_EMPTY 0x1
- #define ENCLOSED_EMPTY 0x2
- #define LINE_TERM_EMPTY 0x4
- #define LINE_START_EMPTY 0x8
- #define ESCAPED_EMPTY 0x10
- struct sql_ex_info
- {
- char field_term;
- char enclosed;
- char line_term;
- char line_start;
- char escaped;
- char opt_flags; // flags for the options
- char empty_flags; // flags to indicate which of the terminating charact
- } ;
- class Load_log_event: public Log_event
- {
- protected:
- char* data_buf;
- void copy_log_event(const char *buf, ulong data_len);
- public:
- ulong thread_id;
- uint32 table_name_len;
- uint32 db_len;
- uint32 fname_len;
- uint32 num_fields;
- const char* fields;
- const uchar* field_lens;
- uint32 field_block_len;
-
- const char* table_name;
- const char* db;
- const char* fname;
- uint32 skip_lines;
- sql_ex_info sql_ex;
-
- #if !defined(MYSQL_CLIENT)
- THD* thd;
- String field_lens_buf;
- String fields_buf;
- Load_log_event(THD* thd, sql_exchange* ex, const char* table_name_arg,
- List<Item>& fields_arg, enum enum_duplicates handle_dup ):
- Log_event(thd->start_time),data_buf(0),thread_id(thd->thread_id),
- num_fields(0),fields(0),field_lens(0),field_block_len(0),
- table_name(table_name_arg),
- db(thd->db),
- fname(ex->file_name),
- thd(thd)
- {
- time_t end_time;
- time(&end_time);
- exec_time = (ulong) (end_time - thd->start_time);
- valid_exec_time = 1;
- db_len = (db) ? (uint32) strlen(db) : 0;
- table_name_len = (table_name) ? (uint32) strlen(table_name) : 0;
- fname_len = (fname) ? (uint) strlen(fname) : 0;
- sql_ex.field_term = (*ex->field_term)[0];
- sql_ex.enclosed = (*ex->enclosed)[0];
- sql_ex.line_term = (*ex->line_term)[0];
- sql_ex.line_start = (*ex->line_start)[0];
- sql_ex.escaped = (*ex->escaped)[0];
- sql_ex.opt_flags = 0;
- if(ex->dumpfile)
- sql_ex.opt_flags |= DUMPFILE_FLAG;
- if(ex->opt_enclosed)
- sql_ex.opt_flags |= OPT_ENCLOSED_FLAG;
- sql_ex.empty_flags = 0;
- switch(handle_dup)
- {
- case DUP_IGNORE: sql_ex.opt_flags |= IGNORE_FLAG; break;
- case DUP_REPLACE: sql_ex.opt_flags |= REPLACE_FLAG; break;
- case DUP_ERROR: break;
- }
- if(!ex->field_term->length())
- sql_ex.empty_flags |= FIELD_TERM_EMPTY;
- if(!ex->enclosed->length())
- sql_ex.empty_flags |= ENCLOSED_EMPTY;
- if(!ex->line_term->length())
- sql_ex.empty_flags |= LINE_TERM_EMPTY;
- if(!ex->line_start->length())
- sql_ex.empty_flags |= LINE_START_EMPTY;
- if(!ex->escaped->length())
- sql_ex.empty_flags |= ESCAPED_EMPTY;
-
- skip_lines = ex->skip_lines;
- List_iterator<Item> li(fields_arg);
- field_lens_buf.length(0);
- fields_buf.length(0);
- Item* item;
- while((item = li++))
- {
- num_fields++;
- uchar len = (uchar) strlen(item->name);
- field_block_len += len + 1;
- fields_buf.append(item->name, len + 1);
- field_lens_buf.append((char*)&len, 1);
- }
- field_lens = (const uchar*)field_lens_buf.ptr();
- fields = fields_buf.ptr();
- }
- void set_fields(List<Item> &fields_arg);
- #endif
- Load_log_event(IO_CACHE * file, time_t when, uint32 server_id_arg);
- Load_log_event(const char* buf, int event_len);
- ~Load_log_event()
- {
- if (data_buf)
- {
- my_free((gptr) data_buf, MYF(0));
- }
- }
- Log_event_type get_type_code() { return LOAD_EVENT; }
- int write_data(IO_CACHE* file); // returns 0 on success, -1 on error
- int get_data_size()
- {
- return table_name_len + 2 + db_len + 2 + fname_len
- + 4 // thread_id
- + 4 // exec_time
- + 4 // skip_lines
- + 4 // field block len
- + sizeof(sql_ex) + field_block_len + num_fields*sizeof(uchar) ;
- ;
- }
- void print(FILE* file, bool short_form = 0);
- };
- extern char server_version[SERVER_VERSION_LENGTH];
- class Start_log_event: public Log_event
- {
- public:
- uint32 created;
- uint16 binlog_version;
- char server_version[50];
-
- Start_log_event() :Log_event(time(NULL)),binlog_version(BINLOG_VERSION)
- {
- created = (uint32) when;
- memcpy(server_version, ::server_version, sizeof(server_version));
- }
- Start_log_event(IO_CACHE* file, time_t when_arg, uint32 server_id_arg) :
- Log_event(when_arg, 0, 0, server_id_arg)
- {
- char buf[sizeof(server_version) + 2 + 4 + 4];
- if (my_b_read(file, (byte*) buf, sizeof(buf)))
- return;
- binlog_version = uint2korr(buf+4);
- memcpy(server_version, buf + 6, sizeof(server_version));
- server_version[sizeof(server_version)-1]=0;
- created = uint4korr(buf + 6 + sizeof(server_version));
- }
- Start_log_event(const char* buf);
-
- ~Start_log_event() {}
- Log_event_type get_type_code() { return START_EVENT;}
- int write_data(IO_CACHE* file);
- int get_data_size()
- {
- // sizeof(binlog_version) + sizeof(server_version) sizeof(created)
- return 2 + sizeof(server_version) + 4;
- }
- void print(FILE* file, bool short_form = 0);
- };
- class Intvar_log_event: public Log_event
- {
- public:
- ulonglong val;
- uchar type;
- Intvar_log_event(uchar type_arg, ulonglong val_arg)
- :Log_event(time(NULL)),val(val_arg),type(type_arg)
- {}
- Intvar_log_event(IO_CACHE* file, time_t when, uint32 server_id_arg);
- Intvar_log_event(const char* buf);
- ~Intvar_log_event() {}
- Log_event_type get_type_code() { return INTVAR_EVENT;}
- int get_data_size() { return sizeof(type) + sizeof(val);}
- int write_data(IO_CACHE* file);
-
-
- void print(FILE* file, bool short_form = 0);
- };
- class Stop_log_event: public Log_event
- {
- public:
- Stop_log_event() :Log_event(time(NULL))
- {}
- Stop_log_event(IO_CACHE* file, time_t when_arg, uint32 server_id_arg):
- Log_event(when_arg,0,0,server_id_arg)
- {
- byte skip[4];
- my_b_read(file, skip, sizeof(skip)); // skip the event length
- }
- Stop_log_event(const char* buf):Log_event(buf)
- {
- }
- ~Stop_log_event() {}
- Log_event_type get_type_code() { return STOP_EVENT;}
- void print(FILE* file, bool short_form = 0);
- };
- class Rotate_log_event: public Log_event
- {
- public:
- const char* new_log_ident;
- uchar ident_len;
- bool alloced;
-
- Rotate_log_event(const char* new_log_ident_arg, uint ident_len_arg = 0) :
- Log_event(time(NULL)),
- new_log_ident(new_log_ident_arg),
- ident_len(ident_len_arg ? ident_len_arg : (uint) strlen(new_log_ident_arg)),
- alloced(0)
- {}
-
- Rotate_log_event(IO_CACHE* file, time_t when, uint32 server_id_arg) ;
- Rotate_log_event(const char* buf, int event_len);
- ~Rotate_log_event()
- {
- if (alloced)
- my_free((gptr) new_log_ident, MYF(0));
- }
- Log_event_type get_type_code() { return ROTATE_EVENT;}
- int get_data_size() { return ident_len;}
- int write_data(IO_CACHE* file);
-
- void print(FILE* file, bool short_form = 0);
- };
- #endif