Commit 84627f5b authored by unknown's avatar unknown
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WL 2826: Step 10 

New methods to read/write/initialise table log


sql/mysql_priv.h:
  New methods to read/write/initialise table log
sql/sql_table.cc:
  New methods to read/write/initialise table log
parent dde234ae

sql/mysql_priv.h

+18 −1
Original line number Diff line number Diff line
@@ -1158,7 +1158,24 @@ typedef struct st_lock_param_type 


void mem_alloc_error(size_t size);



bool write_table_log(ALTER_PARTITION_PARAM_TYPE *lpt);

typedef struct st_table_log_entry

{

  const char *name;

  const char *from_name;

  const char *handler_type;

  char action_type;

} TABLE_LOG_ENTRY;





bool write_table_log_entry(TABLE_LOG_ENTRY *table_log_entry,

                           uint next_entry,

                           uint *entry_written);

bool write_execute_table_log_entry(uint first_entry, uint *exec_entry);

uint read_table_log_header();

bool read_table_log_entry(uint read_entry, TABLE_LOG_ENTRY *table_log_entry);

bool init_table_log();

void release_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);

bool write_log_add_partition(ALTER_PARTITION_PARAM_TYPE *lpt);

sql/sql_table.cc

+115 −5
Original line number Diff line number Diff line
@@ -247,11 +247,12 @@ static int mysql_copy_key_list(List<Key> *orig_key, 


/*

  SYNOPSIS

    write_table_log()

    lpt                       Struct carrying parameters to the function

    write_table_log_entry()

    table_log_entry         Information about log entry

    out:entry_written       Entry information written into   



  RETURN VALUES

    TRUE                      Failure in writing the log

    TRUE                      Error

    FALSE                     Success



  DESCRIPTION
@@ -260,13 +261,122 @@ static int mysql_copy_key_list(List<Key> *orig_key, 
*/



bool

write_table_log(ALTER_PARTITION_PARAM_TYPE *lpt)

write_table_log_entry(TABLE_LOG_ENTRY *table_log_entry,

                      uint next_entry,

                      uint *entry_written)

{

  DBUG_ENTER("write_table_log_entry");

  DBUG_RETURN(FALSE);

}





/*

  Write final entry in the table log

  SYNOPSIS

    write_execute_table_log_entry()

    first_entry                    First entry in linked list of entries

                                   to execute, if 0 = NULL it means that

                                   the entry is removed and the entries

                                   are put into the free list.

    in:out:exec_entry              Entry to execute, 0 = NULL if the entry

                                   is written first time and needs to be

                                   returned. In this case the entry written

                                   is returned in this parameter

  RETURN VALUES

    TRUE                           Error

    FALSE                          Success



  DESCRIPTION

    This is the last write in the table log. The previous log entries have

    already been written but not yet synched to disk.

*/ 



bool

write_execute_table_log_entry(uint first_entry, uint *exec_entry)

{

  DBUG_ENTER("write_execute_table_log_entry");

  DBUG_RETURN(FALSE);

}





/*

  Read header of table log file

  SYNOPSIS

    read_table_log_header()

  RETURN VALUES

    > 0                  Last entry in table log

    0                    No entries in table log

  DESCRIPTION

    When we read the table log header we get information about maximum sizes

    of names in the table log and we also get information about the number

    of entries in the table log.

*/



uint

read_table_log_header()

{

  DBUG_ENTER("read_table_log_header");

  DBUG_RETURN(0);

}





/*

  Read a table log entry

  SYNOPSIS

    read_table_log_entry()

    read_entry               Number of entry to read

    out:entry_info           Information from entry

  RETURN VALUES

    TRUE                     Error

    FALSE                    Success

  DESCRIPTION

    Read a specified entry in the table log

*/



bool

read_table_log_entry(uint read_entry, TABLE_LOG_ENTRY *table_log_entry)

{

  DBUG_ENTER("write_table_log");

  DBUG_ENTER("read_table_log_entry");

  DBUG_RETURN(FALSE);

}





/*

  Initialise table log

  SYNOPSIS

    init_table_log()

  RETURN VALUES

    TRUE                     Error

    FALSE                    Success

  DESCRIPTION

    Write the header of the table log file and length of names. Also set

    number of entries to zero.

*/



bool

init_table_log()

{

  DBUG_ENTER("init_table_log");

  DBUG_RETURN(FALSE);

}





/*

  Release all memory allocated to the table log

  SYNOPSIS

    release_table_log()

  RETURN VALUES

    NONE

*/



void

release_table_log()

{

  DBUG_ENTER("release_table_log");

  DBUG_RETURN_VOID;

}





/*

  SYNOPSIS

    mysql_write_frm()