Commit 925a53b9 authored by unknown's avatar unknown
Browse files

Merge pchardin@bk-internal.mysql.com:/home/bk/mysql-5.1 

into  mysql.com:/home/cps/mysql/devel/5.1-csv-remove-mmap
parents ed849efc 48db4010

mysql-test/r/csv.result

+2 −2
Original line number Diff line number Diff line
@@ -4944,10 +4944,10 @@ val 
UPDATE  bug13894 SET val=6 WHERE val=10;

SELECT * FROM bug13894;

val

5

11

6

6

5

11

DROP TABLE bug13894;

DROP TABLE IF EXISTS bug14672;

CREATE TABLE bug14672 (c1 integer) engine = CSV;

storage/csv/ha_tina.cc

+319 −193

File changed.

Preview size limit exceeded, changes collapsed.

storage/csv/ha_tina.h

+58 −5
Original line number Diff line number Diff line
@@ -29,15 +29,12 @@ 
typedef struct st_tina_share {

  char *table_name;

  char data_file_name[FN_REFLEN];

  byte *mapped_file;                /* mapped region of file */

  uint table_name_length, use_count;

  /*

    Below flag is needed to make log tables work with concurrent insert.

    For more details see comment to ha_tina::update_status.

  */

  my_bool is_log_table;

  MY_STAT file_stat;                /* Stat information for the data file */

  File data_file;                   /* Current open data file */

  /*

    Here we save the length of the file for readers. This is updated by

    inserts, updates and deletes. The var is initialized along with the
@@ -46,7 +43,10 @@ typedef struct st_tina_share { 
  off_t saved_data_file_length;

  pthread_mutex_t mutex;

  THR_LOCK lock;

  bool update_file_opened;

  bool tina_write_opened;

  File meta_file;           /* Meta file we use */

  File tina_write_filedes;  /* File handler for readers */

  bool crashed;             /* Meta file is crashed */

  ha_rows rows_recorded;    /* Number of rows in tables */

} TINA_SHARE;
@@ -56,6 +56,49 @@ struct tina_set { 
  off_t end;

};



class Transparent_file

{

   File filedes;

   byte *buff;  /* in-memory window to the file or mmaped area */

   /* current window sizes */

   off_t lower_bound;

   off_t upper_bound;

   uint buff_size;



 public:



   Transparent_file() : lower_bound(0), buff_size(IO_SIZE)

   { buff= (byte *) my_malloc(buff_size*sizeof(byte),  MYF(MY_WME)); }



   ~Transparent_file()

   { my_free((gptr)buff, MYF(MY_ALLOW_ZERO_PTR)); }



   void init_buff(File filedes_arg)

   {

     filedes= filedes_arg;

     /* read the beginning of the file */

     lower_bound= 0;

     VOID(my_seek(filedes, 0, MY_SEEK_SET, MYF(0)));

     if (filedes && buff)

       upper_bound= my_read(filedes, buff, buff_size, MYF(0));

   }



   byte *ptr()

   { return buff; }



   off_t start()

   { return lower_bound; }



   off_t end()

   { return upper_bound; }



   /* get a char from the given position in the file */

   char get_value (off_t offset);

   /* shift a buffer windows to see the next part of the file */

   off_t read_next();



};



class ha_tina: public handler

{

  THR_LOCK_DATA lock;      /* MySQL lock */
@@ -64,6 +107,9 @@ class ha_tina: public handler 
  off_t next_position;     /* Next position in the file scan */

  off_t local_saved_data_file_length; /* save position for reads */

  byte byte_buffer[IO_SIZE];

  Transparent_file *file_buff;

  File data_file;                   /* File handler for readers */

  File update_temp_file;

  String buffer;

  /*

    The chain contains "holes" in the file, occured because of
@@ -77,12 +123,19 @@ class ha_tina: public handler 
  uint32 chain_size;

  bool records_is_known;



private:

  bool get_write_pos(off_t *end_pos, tina_set *closest_hole);

  int open_update_temp_file_if_needed();

  int init_tina_writer();



public:

  ha_tina(TABLE_SHARE *table_arg);

  ~ha_tina()

  {

    if (chain_alloced)

      my_free((gptr)chain, 0);

    if (file_buff)

      delete file_buff;

  }

  const char *table_type() const { return "CSV"; }

  const char *index_type(uint inx) { return "NONE"; }