Cleanup: Remove some unused functions

sql/ha_partition.h

@@ -3,7 +3,7 @@
 
 /*
    Copyright (c) 2005, 2012, Oracle and/or its affiliates.
-   Copyright (c) 2009, 2021, MariaDB Corporation.
+   Copyright (c) 2009, 2022, MariaDB Corporation.
 
    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
@@ -793,10 +793,6 @@ class ha_partition :public handler
     NOTE: This cannot be cached since it can depend on TRANSACTION ISOLATION
     LEVEL which is dynamic, see bug#39084.
 
-    HA_READ_RND_SAME:
-    Not currently used. (Means that the handler supports the rnd_same() call)
-    (MyISAM, HEAP)
-
     HA_TABLE_SCAN_ON_INDEX:
     Used to avoid scanning full tables on an index. If this flag is set then
     the handler always has a primary key (hidden if not defined) and this

sql/handler.cc

 /* Copyright (c) 2000, 2016, Oracle and/or its affiliates.
-   Copyright (c) 2009, 2018, MariaDB Corporation.
+   Copyright (c) 2009, 2022, MariaDB Corporation.
 
    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
@@ -2531,11 +2531,6 @@ double handler::keyread_time(uint index, uint ranges, ha_rows rows)
          len*rows/(stats.block_size+1)/TIME_FOR_COMPARE ;
 }
 
-void **handler::ha_data(THD *thd) const
-{
-  return thd_ha_data(thd, ht);
-}
-
 THD *handler::ha_thd(void) const
 {
   DBUG_ASSERT(!table || !table->in_use || table->in_use == current_thd);
@@ -6271,17 +6266,6 @@ void handler::unlock_shared_ha_data()
     mysql_mutex_unlock(&table_share->LOCK_ha_data);
 }
 
-/** @brief
-  Dummy function which accept information about log files which is not need
-  by handlers
-*/
-void signal_log_not_needed(struct handlerton, char *log_file)
-{
-  DBUG_ENTER("signal_log_not_needed");
-  DBUG_PRINT("enter", ("logfile '%s'", log_file));
-  DBUG_VOID_RETURN;
-}
-
 void handler::set_lock_type(enum thr_lock_type lock)
 {
   table->reginfo.lock_type= lock;
@@ -6384,177 +6368,6 @@ void ha_fake_trx_id(THD *thd)
 #endif /* WITH_WSREP */
 
 
-#ifdef TRANS_LOG_MGM_EXAMPLE_CODE
-/*
-  Example of transaction log management functions based on assumption that logs
-  placed into a directory
-*/
-#include <my_dir.h>
-#include <my_sys.h>
-int example_of_iterator_using_for_logs_cleanup(handlerton *hton)
-{
-  void *buffer;
-  int res= 1;
-  struct handler_iterator iterator;
-  struct handler_log_file_data data;
-
-  if (!hton->create_iterator)
-    return 1; /* iterator creator is not supported */
-
-  if ((*hton->create_iterator)(hton, HA_TRANSACTLOG_ITERATOR, &iterator) !=
-      HA_ITERATOR_OK)
-  {
-    /* error during creation of log iterator or iterator is not supported */
-    return 1;
-  }
-  while((*iterator.next)(&iterator, (void*)&data) == 0)
-  {
-    printf("%s\n", data.filename.str);
-    if (data.status == HA_LOG_STATUS_FREE &&
-        mysql_file_delete(INSTRUMENT_ME,
-                          data.filename.str, MYF(MY_WME)))
-      goto err;
-  }
-  res= 0;
-err:
-  (*iterator.destroy)(&iterator);
-  return res;
-}
-
-
-/*
-  Here we should get info from handler where it save logs but here is
-  just example, so we use constant.
-  IMHO FN_ROOTDIR ("/") is safe enough for example, because nobody has
-  rights on it except root and it consist of directories only at lest for
-  *nix (sorry, can't find windows-safe solution here, but it is only example).
-*/
-#define fl_dir FN_ROOTDIR
-
-
-/** @brief
-  Dummy function to return log status should be replaced by function which
-  really detect the log status and check that the file is a log of this
-  handler.
-*/
-enum log_status fl_get_log_status(char *log)
-{
-  MY_STAT stat_buff;
-  if (mysql_file_stat(INSTRUMENT_ME, log, &stat_buff, MYF(0)))
-    return HA_LOG_STATUS_INUSE;
-  return HA_LOG_STATUS_NOSUCHLOG;
-}
-
-
-struct fl_buff
-{
-  LEX_STRING *names;
-  enum log_status *statuses;
-  uint32 entries;
-  uint32 current;
-};
-
-
-int fl_log_iterator_next(struct handler_iterator *iterator,
-                          void *iterator_object)
-{
-  struct fl_buff *buff= (struct fl_buff *)iterator->buffer;
-  struct handler_log_file_data *data=
-    (struct handler_log_file_data *) iterator_object;
-  if (buff->current >= buff->entries)
-    return 1;
-  data->filename= buff->names[buff->current];
-  data->status= buff->statuses[buff->current];
-  buff->current++;
-  return 0;
-}
-
-
-void fl_log_iterator_destroy(struct handler_iterator *iterator)
-{
-  my_free(iterator->buffer);
-}
-
-
-/** @brief
-  returns buffer, to be assigned in handler_iterator struct
-*/
-enum handler_create_iterator_result
-fl_log_iterator_buffer_init(struct handler_iterator *iterator)
-{
-  MY_DIR *dirp;
-  struct fl_buff *buff;
-  char *name_ptr;
-  uchar *ptr;
-  FILEINFO *file;
-  uint32 i;
-
-  /* to be able to make my_free without crash in case of error */
-  iterator->buffer= 0;
-
-  if (!(dirp = my_dir(fl_dir, MYF(MY_THREAD_SPECIFIC))))
-  {
-    return HA_ITERATOR_ERROR;
-  }
-  if ((ptr= (uchar*)my_malloc(ALIGN_SIZE(sizeof(fl_buff)) +
-                             ((ALIGN_SIZE(sizeof(LEX_STRING)) +
-                               sizeof(enum log_status) +
-                               + FN_REFLEN + 1) *
-                              (uint) dirp->number_off_files),
-                             MYF(MY_THREAD_SPECIFIC))) == 0)
-  {
-    return HA_ITERATOR_ERROR;
-  }
-  buff= (struct fl_buff *)ptr;
-  buff->entries= buff->current= 0;
-  ptr= ptr + (ALIGN_SIZE(sizeof(fl_buff)));
-  buff->names= (LEX_STRING*) (ptr);
-  ptr= ptr + ((ALIGN_SIZE(sizeof(LEX_STRING)) *
-               (uint) dirp->number_off_files));
-  buff->statuses= (enum log_status *)(ptr);
-  name_ptr= (char *)(ptr + (sizeof(enum log_status) *
-                            (uint) dirp->number_off_files));
-  for (i=0 ; i < (uint) dirp->number_off_files  ; i++)
-  {
-    enum log_status st;
-    file= dirp->dir_entry + i;
-    if ((file->name[0] == '.' &&
-         ((file->name[1] == '.' && file->name[2] == '\0') ||
-            file->name[1] == '\0')))
-      continue;
-    if ((st= fl_get_log_status(file->name)) == HA_LOG_STATUS_NOSUCHLOG)
-      continue;
-    name_ptr= strxnmov(buff->names[buff->entries].str= name_ptr,
-                       FN_REFLEN, fl_dir, file->name, NullS);
-    buff->names[buff->entries].length= (name_ptr -
-                                        buff->names[buff->entries].str);
-    buff->statuses[buff->entries]= st;
-    buff->entries++;
-  }
-
-  iterator->buffer= buff;
-  iterator->next= &fl_log_iterator_next;
-  iterator->destroy= &fl_log_iterator_destroy;
-  my_dirend(dirp);
-  return HA_ITERATOR_OK;
-}
-
-
-/* An example of a iterator creator */
-enum handler_create_iterator_result
-fl_create_iterator(enum handler_iterator_type type,
-                   struct handler_iterator *iterator)
-{
-  switch(type) {
-  case HA_TRANSACTLOG_ITERATOR:
-    return fl_log_iterator_buffer_init(iterator);
-  default:
-    return HA_ITERATOR_UNSUPPORTED;
-  }
-}
-#endif /*TRANS_LOG_MGM_EXAMPLE_CODE*/
-
-
 bool HA_CREATE_INFO::check_conflicting_charset_declarations(CHARSET_INFO *cs)
 {
   if ((used_fields & HA_CREATE_USED_DEFAULT_CHARSET) &&

sql/handler.h

@@ -783,31 +783,6 @@ typedef bool (stat_print_fn)(THD *thd, const char *type, size_t type_len,
 enum ha_stat_type { HA_ENGINE_STATUS, HA_ENGINE_LOGS, HA_ENGINE_MUTEX };
 extern MYSQL_PLUGIN_IMPORT st_plugin_int *hton2plugin[MAX_HA];
 
-/* Transaction log maintains type definitions */
-enum log_status
-{
-  HA_LOG_STATUS_FREE= 0,      /* log is free and can be deleted */
-  HA_LOG_STATUS_INUSE= 1,     /* log can't be deleted because it is in use */
-  HA_LOG_STATUS_NOSUCHLOG= 2  /* no such log (can't be returned by
-                                the log iterator status) */
-};
-/*
-  Function for signaling that the log file changed its state from
-  LOG_STATUS_INUSE to LOG_STATUS_FREE
-
-  Now it do nothing, will be implemented as part of new transaction
-  log management for engines.
-  TODO: implement the function.
-*/
-void signal_log_not_needed(struct handlerton, char *log_file);
-/*
-  Data of transaction log iterator.
-*/
-struct handler_log_file_data {
-  LEX_STRING filename;
-  enum log_status status;
-};
-
 /*
   Definitions for engine-specific table/field/index options in the CREATE TABLE.
 
@@ -922,46 +897,6 @@ typedef struct st_ha_create_table_option {
   struct st_mysql_sys_var *var;
 } ha_create_table_option;
 
-enum handler_iterator_type
-{
-  /* request of transaction log iterator */
-  HA_TRANSACTLOG_ITERATOR= 1
-};
-enum handler_create_iterator_result
-{
-  HA_ITERATOR_OK,          /* iterator created */
-  HA_ITERATOR_UNSUPPORTED, /* such type of iterator is not supported */
-  HA_ITERATOR_ERROR        /* error during iterator creation */
-};
-
-/*
-  Iterator structure. Can be used by handler/handlerton for different purposes.
-
-  Iterator should be created in the way to point "before" the first object
-  it iterate, so next() call move it to the first object or return !=0 if
-  there is nothing to iterate through.
-*/
-struct handler_iterator {
-  /*
-    Moves iterator to next record and return 0 or return !=0
-    if there is no records.
-    iterator_object will be filled by this function if next() returns 0.
-    Content of the iterator_object depend on iterator type.
-  */
-  int (*next)(struct handler_iterator *, void *iterator_object);
-  /*
-    Free resources allocated by iterator, after this call iterator
-    is not usable.
-  */
-  void (*destroy)(struct handler_iterator *);
-  /*
-    Pointer to buffer for the iterator to use.
-    Should be allocated by function which created the iterator and
-    destroyed by freed by above "destroy" call
-  */
-  void *buffer;
-};
-
 class handler;
 class group_by_handler;
 struct Query;
@@ -1223,22 +1158,6 @@ struct handlerton
                             const char *query, uint query_length,
                             const char *db, const char *table_name);
 
-   /*
-     Get log status.
-     If log_status is null then the handler do not support transaction
-     log information (i.e. log iterator can't be created).
-     (see example of implementation in handler.cc, TRANS_LOG_MGM_EXAMPLE_CODE)
-
-   */
-   enum log_status (*get_log_status)(handlerton *hton, char *log);
-
-   /*
-     Iterators creator.
-     Presence of the pointer should be checked before using
-   */
-   enum handler_create_iterator_result
-     (*create_iterator)(handlerton *hton, enum handler_iterator_type type,
-                        struct handler_iterator *fill_this_in);
    void (*abort_transaction)(handlerton *hton, THD *bf_thd,
 			    THD *victim_thd, my_bool signal);
    int (*set_checkpoint)(handlerton *hton, const XID* xid);
@@ -3291,15 +3210,13 @@ class handler :public Sql_alloc
   inline int ha_read_first_row(uchar *buf, uint primary_key);
 
   /**
-    The following 3 function is only needed for tables that may be
+    The following 2 function is only needed for tables that may be
     internal temporary tables during joins.
   */
   virtual int remember_rnd_pos()
     { return HA_ERR_WRONG_COMMAND; }
   virtual int restart_rnd_next(uchar *buf)
     { return HA_ERR_WRONG_COMMAND; }
-  virtual int rnd_same(uchar *buf, uint inx)
-    { return HA_ERR_WRONG_COMMAND; }
 
   virtual ha_rows records_in_range(uint inx, key_range *min_key,
                                    key_range *max_key)
@@ -3970,7 +3887,6 @@ class handler :public Sql_alloc
   TABLE_SHARE* get_table_share() { return table_share; }
 protected:
   /* Service methods for use by storage engines. */
-  void **ha_data(THD *) const;
   THD *ha_thd(void) const;
 
   /**

storage/federatedx/ha_federatedx.cc

@@ -1720,7 +1720,7 @@ ha_rows ha_federatedx::records_in_range(uint inx, key_range *start_key,
 
 federatedx_txn *ha_federatedx::get_txn(THD *thd, bool no_create)
 {
-  federatedx_txn **txnp= (federatedx_txn **) ha_data(thd);
+  federatedx_txn **txnp= (federatedx_txn **) thd_ha_data(thd, ht);
   if (!*txnp && !no_create)
     *txnp= new federatedx_txn();
   return *txnp;