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WL 2826: Step 12

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More table log code
This commit is contained in:
mikron@mikael-ronstr-ms-dator.local
2006-02-07 16:26:34 +01:00
parent 5091f3a8a5
commit 17897f9a5c
2 changed files with 113 additions and 9 deletions
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1
sql/mysql_priv.h
View File

@ -1182,6 +1182,7 @@ bool execute_table_log_entry(uint first_entry);
bool execute_table_log_action(TABLE_LOG_ENTRY *table_log_entry);
void lock_global_table_log();
void unlock_global_table_log();
bool sync_table_log();
bool write_log_shadow_frm(ALTER_PARTITION_PARAM_TYPE *lpt, bool install_flag);
bool write_log_drop_partition(ALTER_PARTITION_PARAM_TYPE *lpt);

121
sql/sql_table.cc
View File

@ -281,6 +281,7 @@ typedef struct st_global_table_log
char *file_name;
List<TABLE_LOG_MEMORY_ENTRY> free_entries;
List<TABLE_LOG_MEMORY_ENTRY> log_entries;
uint no_entries;
File file_id;
uint name_len;
uint handler_type_len;
@ -291,6 +292,52 @@ GLOBAL_TABLE_LOG global_table_log;
pthread_mutex_t LOCK_gtl;
/*
Sync table log file
SYNOPSIS
sync_table_log()
RETURN VALUES
TRUE Error
FALSE Success
*/
bool
sync_table_log()
{
bool error= FALSE;
DBUG_ENTER("sync_table_log");
if (my_sync(global_table_log.file_id, MYF(0)))
error= TRUE;
DBUG_RETURN(error);
}
/*
Write one entry from table log file
SYNOPSIS
write_table_log_file_entry()
file_id File identifier
file_entry Memory area to read entry into
entry_no Entry number to read
RETURN VALUES
TRUE Error
FALSE Success
*/
static
bool
write_table_log_file_entry(File file_id, byte *file_entry, uint entry_no)
{
bool error= FALSE;
DBUG_ENTER("read_table_log_file_entry");
if (my_pwrite(file_id, file_entry, IO_SIZE, IO_SIZE * entry_no, MYF(0)))
error= TRUE;
DBUG_RETURN(error);
}
/*
SYNOPSIS
write_table_log_entry()
@ -308,10 +355,67 @@ pthread_mutex_t LOCK_gtl;
bool
write_table_log_entry(TABLE_LOG_ENTRY *table_log_entry,
uint next_entry,
uint *entry_written)
{
bool write_header, error;
DBUG_ENTER("write_table_log_entry");
global_table_log.file_entry[0]= 'i';
global_table_log.file_entry[1]= table_log_entry->action_type;
int4store(&global_table_log.file_entry[2],
table_log_entry->next_entry);
strcpy(&global_table_log.file_entry[6], table_log_entry->name);
if (table_log_entry.action_type == 'r')
global_table_log.file_entry[6 + NAMELEN]= 0;
else
strcpy(&global_table_log.file_entry[6 + NAMELEN],
table_log_entry->from_name);
strcpy(&global_table_log.file_entry[6 + (2*NAMELEN)],
table_log_entry->handler_type);
if (global_table_log.free_entries.is_empty())
{
global_table_log.no_entries++;
entry_no= global_table_log.no_entries;
write_header= TRUE;
}
else
{
TABLE_LOG_MEMORY *tmp= global_table_log.free_entries.pop();
global_table_log.log_entries.push_back(tmp);
entry_no= tmp->entry_pos;
write_header= FALSE;
}
error= FALSE;
if (write_table_log_entry(global_table_log.file_id,
global_table_log.file_entry,
entry_no))
error= TRUE;
else if (write_header || !(write_table_log_header()))
error= TRUE;
DBUG_RETURN(error);
}
/*
Write table log header
SYNOPSIS
write_table_log_header()
RETURN VALUES
TRUE Error
FALSE Success
*/
bool
write_table_log_header()
{
uint16 const_var;
DBUG_ENTER("write_table_log_header");
int4store(&global_table_log.file_entry[0], global_table_log.no_entries);
const_var= NAMELEN;
int2store(&global_table_log.file_entry[4], const_var);
const_var= 32;
int2store(&global_table_log.file_entry[6], const_var);
DBUG_RETURN(FALSE);
}
@ -398,6 +502,8 @@ read_table_log_header()
global_table_log.name_len= uint2korr(&file_entry[4]);
global_table_log.handler_type_len= uint2korr(&file_entry[6]);
global_table_log.free_entries.clear();
global_table_log.log_entries.clear();
global_table_log.no_entries= 0;
VOID(pthread_mutex_init(&LOCK_gtl, MY_MUTEX_INIT_FAST));
DBUG_RETURN(entry_no);
}
@ -439,18 +545,15 @@ read_table_log_entry(uint read_entry, TABLE_LOG_ENTRY *table_log_entry)
bool
init_table_log()
{
uint no_entries= 0;
uint16 const_var;
bool error= FALSE;
DBUG_ENTER("init_table_log");
VOID(my_delete(global_table_log.file_name));
global_table_log.file_id= my_open(global_table_log.file_name,
0, 0, MYF(0));
int4store(&global_table_log.file_entry[0], &no_entries);
const_var= NAMELEN;
int2store(&global_table_log.file_entry[4], &const_var);
const_var= 32;
int2store(&global_table_log.file_entry[6], &const_var);
DBUG_RETURN(FALSE);
if (write_table_log_header())
error= TRUE;
DBUG_RETURN(error);
}