Code cleanups

- unused TABLE_SHARE::deleting and TABLE_LIST::deleting flags were removed
- kill_delayed_threads_for_table() and intern_close_table() are now private
  methods of table cache
- removed free_share flag of closefrm(): it was never used for temporary
  tables and was rarely useful for regular tables

sql/handler.cc

@@ -4694,7 +4694,7 @@ int ha_create_table(THD *thd, const char *path,
                               share.table_name.str, share.table_name.length);
   }
 
-  (void) closefrm(&table, 0);
+  (void) closefrm(&table);
  
 err:
   free_table_share(&share);

sql/sql_admin.cc

@@ -261,7 +261,10 @@ static int prepare_for_repair(THD *thd, TABLE_LIST *table_list,
 end:
   thd->locked_tables_list.unlink_all_closed_tables(thd, NULL, 0);
   if (table == &tmp_table)
-    closefrm(table, 1);				// Free allocated memory
+  {
+    closefrm(table);
+    tdc_release_share(table->s);
+  }
   /* In case of a temporary table there will be no metadata lock. */
   if (error && has_mdl_lock)
     thd->mdl_context.release_transactional_locks();

sql/sql_base.cc

@@ -336,68 +336,6 @@ OPEN_TABLE_LIST *list_open_tables(THD *thd, const char *db, const char *wild)
   DBUG_RETURN(argument.open_list);
 }
 
-/*****************************************************************************
- *	 Functions to free open table cache
- ****************************************************************************/
-
-
-void intern_close_table(TABLE *table)
-{						// Free all structures
-  DBUG_ENTER("intern_close_table");
-  DBUG_PRINT("tcache", ("table: '%s'.'%s' 0x%lx",
-                        table->s ? table->s->db.str : "?",
-                        table->s ? table->s->table_name.str : "?",
-                        (long) table));
-
-  delete table->triggers;
-  if (table->file)                              // Not true if placeholder
-    (void) closefrm(table, 1);			// close file
-  table->alias.free();
-  my_free(table);
-  DBUG_VOID_RETURN;
-}
-
-
-/**
-   Auxiliary function which allows to kill delayed threads for
-   particular table identified by its share.
-
-   @param share Table share.
-
-   @pre Caller should have TABLE_SHARE::tdc.LOCK_table_share mutex.
-*/
-
-void kill_delayed_threads_for_table(TDC_element *element)
-{
-  TDC_element::All_share_tables_list::Iterator it(element->all_tables);
-  TABLE *tab;
-
-  mysql_mutex_assert_owner(&element->LOCK_table_share);
-
-  if (!delayed_insert_threads)
-    return;
-
-  while ((tab= it++))
-  {
-    THD *in_use= tab->in_use;
-
-    DBUG_ASSERT(in_use && tab->s->tdc->flushed);
-    if ((in_use->system_thread & SYSTEM_THREAD_DELAYED_INSERT) &&
-        ! in_use->killed)
-    {
-      in_use->killed= KILL_SYSTEM_THREAD;
-      mysql_mutex_lock(&in_use->mysys_var->mutex);
-      if (in_use->mysys_var->current_cond)
-      {
-        mysql_mutex_lock(in_use->mysys_var->current_mutex);
-        mysql_cond_broadcast(in_use->mysys_var->current_cond);
-        mysql_mutex_unlock(in_use->mysys_var->current_mutex);
-      }
-      mysql_mutex_unlock(&in_use->mysys_var->mutex);
-    }
-  }
-}
-
 
 /*
   Close all tables which aren't in use by any thread
@@ -1779,7 +1717,7 @@ void close_temporary(TABLE *table, bool free_share, bool delete_table)
   DBUG_PRINT("tmptable", ("closing table: '%s'.'%s'",
                           table->s->db.str, table->s->table_name.str));
 
-  closefrm(table, 0);
+  closefrm(table);
   if (delete_table)
     rm_temporary_table(table_type, table->s->path.str);
   if (free_share)
@@ -2545,7 +2483,7 @@ retry_share:
     }
     if (open_table_entry_fini(thd, share, table))
     {
-      closefrm(table, 0);
+      closefrm(table);
       my_free(table);
       goto err_lock;
     }
@@ -3361,12 +3299,12 @@ static bool auto_repair_table(THD *thd, TABLE_LIST *table_list)
     sql_print_error("Couldn't repair table: %s.%s", share->db.str,
                     share->table_name.str);
     if (entry->file)
-      closefrm(entry, 0);
+      closefrm(entry);
   }
   else
   {
     thd->clear_error();			// Clear error message
-    closefrm(entry, 0);
+    closefrm(entry);
     result= FALSE;
   }
 

sql/sql_base.h

@@ -271,8 +271,6 @@ bool open_normal_and_derived_tables(THD *thd, TABLE_LIST *tables, uint flags,
                                     uint dt_phases);
 bool lock_tables(THD *thd, TABLE_LIST *tables, uint counter, uint flags);
 int decide_logging_format(THD *thd, TABLE_LIST *tables);
-void intern_close_table(TABLE *entry);
-void kill_delayed_threads_for_table(TDC_element *element);
 void close_thread_table(THD *thd, TABLE **table_ptr);
 bool close_temporary_tables(THD *thd);
 TABLE_LIST *unique_table(THD *thd, TABLE_LIST *table, TABLE_LIST *table_list,

sql/sql_table.cc

@@ -4889,7 +4889,7 @@ int create_table_impl(THD *thd,
                   open_table_from_share(thd, &share, "", 0, (uint) READ_ALL,
                                         0, &table, true));
     if (!result)
-      (void) closefrm(&table, 0);
+      (void) closefrm(&table);
 
     free_table_share(&share);
 

sql/table.cc

@@ -3020,21 +3020,16 @@ partititon_err:
   SYNOPSIS
     closefrm()
     table		TABLE object to free
-    free_share		Is 1 if we also want to free table_share
 */
 
-int closefrm(register TABLE *table, bool free_share)
+int closefrm(register TABLE *table)
 {
   int error=0;
   DBUG_ENTER("closefrm");
   DBUG_PRINT("enter", ("table: 0x%lx", (long) table));
 
   if (table->db_stat)
-  {
-    if (table->s->deleting)
-      table->file->extra(HA_EXTRA_PREPARE_FOR_DROP);
     error=table->file->ha_close();
-  }
   table->alias.free();
   if (table->expr_arena)
     table->expr_arena->free_items();
@@ -3057,13 +3052,6 @@ int closefrm(register TABLE *table, bool free_share)
     table->part_info= 0;
   }
 #endif
-  if (free_share)
-  {
-    if (table->s->tmp_table == NO_TMP_TABLE)
-      tdc_release_share(table->s);
-    else
-      free_table_share(table->s);
-  }
   free_root(&table->mem_root, MYF(0));
   DBUG_RETURN(error);
 }

sql/table.h

@@ -673,7 +673,6 @@ struct TABLE_SHARE
   bool crypted;                         /* If .frm file is crypted */
   bool crashed;
   bool is_view;
-  bool deleting;                        /* going to delete this table */
   bool can_cmp_whole_record;
   bool table_creation_was_logged;
   ulong table_map_id;                   /* for row-based replication */
@@ -2019,8 +2018,6 @@ struct TABLE_LIST
   */
   bool          is_fqtn;
 
-  bool          deleting;               /* going to delete this table */
-
   /* TRUE <=> derived table should be filled right after optimization. */
   bool          fill_me;
   /* TRUE <=> view/DT is merged. */
@@ -2621,7 +2618,7 @@ bool get_field(MEM_ROOT *mem, Field *field, class String *res);
 bool validate_comment_length(THD *thd, LEX_STRING *comment, size_t max_len,
                              uint err_code, const char *name);
 
-int closefrm(TABLE *table, bool free_share);
+int closefrm(TABLE *table);
 void free_blobs(TABLE *table);
 void free_field_buffers_larger_than(TABLE *table, uint32 size);
 ulong get_form_pos(File file, uchar *head, TYPELIB *save_names);

sql/table_cache.cc

@@ -36,8 +36,6 @@
   - get number of TABLE objects in cache (tc_records())
 
   Dependencies:
-  - intern_close_table(): frees TABLE object
-  - kill_delayed_threads_for_table()
   - close_cached_tables(): flush tables on shutdown
   - alloc_table_share()
   - free_table_share()
@@ -127,6 +125,25 @@ static int fix_thd_pins(THD *thd)
   part of table definition cache.
 */
 
+static void intern_close_table(TABLE *table)
+{
+  DBUG_ENTER("intern_close_table");
+  DBUG_PRINT("tcache", ("table: '%s'.'%s' 0x%lx",
+                        table->s ? table->s->db.str : "?",
+                        table->s ? table->s->table_name.str : "?",
+                        (long) table));
+
+  delete table->triggers;
+  if (table->file)                              // Not true if placeholder
+  {
+    (void) closefrm(table);
+    tdc_release_share(table->s);
+  }
+  table->alias.free();
+  my_free(table);
+  DBUG_VOID_RETURN;
+}
+
 
 /**
   Get number of TABLE objects (used and unused) in table cache.
@@ -938,6 +955,47 @@ void tdc_release_share(TABLE_SHARE *share)
 }
 
 
+/**
+   Auxiliary function which allows to kill delayed threads for
+   particular table identified by its share.
+
+   @param share Table share.
+
+   @pre Caller should have TABLE_SHARE::tdc.LOCK_table_share mutex.
+*/
+
+static void kill_delayed_threads_for_table(TDC_element *element)
+{
+  TDC_element::All_share_tables_list::Iterator it(element->all_tables);
+  TABLE *tab;
+
+  mysql_mutex_assert_owner(&element->LOCK_table_share);
+
+  if (!delayed_insert_threads)
+    return;
+
+  while ((tab= it++))
+  {
+    THD *in_use= tab->in_use;
+
+    DBUG_ASSERT(in_use && tab->s->tdc->flushed);
+    if ((in_use->system_thread & SYSTEM_THREAD_DELAYED_INSERT) &&
+        ! in_use->killed)
+    {
+      in_use->killed= KILL_SYSTEM_THREAD;
+      mysql_mutex_lock(&in_use->mysys_var->mutex);
+      if (in_use->mysys_var->current_cond)
+      {
+        mysql_mutex_lock(in_use->mysys_var->current_mutex);
+        mysql_cond_broadcast(in_use->mysys_var->current_cond);
+        mysql_mutex_unlock(in_use->mysys_var->current_mutex);
+      }
+      mysql_mutex_unlock(&in_use->mysys_var->mutex);
+    }
+  }
+}
+
+
 /**
    Remove all or some (depending on parameter) instances of TABLE and
    TABLE_SHARE from the table definition cache.

storage/oqgraph/ha_oqgraph.cc

@@ -663,7 +663,7 @@ int ha_oqgraph::open(const char *name, int mode, uint test_if_locked)
     {
       fprint_error("Column '%s.%s' (origid) is not a not-null integer type",
           options->table_name, options->origid);
-      closefrm(edges, 0);
+      closefrm(edges);
       free_table_share(share);
       DBUG_RETURN(-1);
     }
@@ -673,7 +673,7 @@ int ha_oqgraph::open(const char *name, int mode, uint test_if_locked)
 
   if (!origid) {
     fprint_error("Invalid OQGRAPH backing store ('%s.origid' attribute not set to a valid column of '%s')", p+1, options->table_name);
-    closefrm(edges, 0);
+    closefrm(edges);
     free_table_share(share);
     DBUG_RETURN(-1);
   }
@@ -688,7 +688,7 @@ int ha_oqgraph::open(const char *name, int mode, uint test_if_locked)
     {
       fprint_error("Column '%s.%s' (destid) is not a not-null integer type or is a different type to origid attribute.",
           options->table_name, options->destid);
-      closefrm(edges, 0);
+      closefrm(edges);
       free_table_share(share);
       DBUG_RETURN(-1);
     }
@@ -698,7 +698,7 @@ int ha_oqgraph::open(const char *name, int mode, uint test_if_locked)
 
   if (!destid) {
     fprint_error("Invalid OQGRAPH backing store ('%s.destid' attribute not set to a valid column of '%s')", p+1, options->table_name);
-    closefrm(edges, 0);
+    closefrm(edges);
     free_table_share(share);
     DBUG_RETURN(-1);
   }
@@ -706,7 +706,7 @@ int ha_oqgraph::open(const char *name, int mode, uint test_if_locked)
   // Make sure origid column != destid column
   if (strcmp( origid->field_name, destid->field_name)==0) {
     fprint_error("Invalid OQGRAPH backing store ('%s.destid' attribute set to same column as origid attribute)", p+1, options->table_name);
-    closefrm(edges, 0);
+    closefrm(edges);
     free_table_share(share);
     DBUG_RETURN(-1);
   }
@@ -720,7 +720,7 @@ int ha_oqgraph::open(const char *name, int mode, uint test_if_locked)
     {
       fprint_error("Column '%s.%s' (weight) is not a not-null real type",
           options->table_name, options->weight);
-      closefrm(edges, 0);
+      closefrm(edges);
       free_table_share(share);
       DBUG_RETURN(-1);
     }
@@ -730,7 +730,7 @@ int ha_oqgraph::open(const char *name, int mode, uint test_if_locked)
 
   if (!weight && options->weight) {
     fprint_error("Invalid OQGRAPH backing store ('%s.weight' attribute not set to a valid column of '%s')", p+1, options->table_name);
-    closefrm(edges, 0);
+    closefrm(edges);
     free_table_share(share);
     DBUG_RETURN(-1);
   }
@@ -738,7 +738,7 @@ int ha_oqgraph::open(const char *name, int mode, uint test_if_locked)
   if (!(graph_share = oqgraph::create(edges, origid, destid, weight)))
   {
     fprint_error("Unable to create graph instance.");
-    closefrm(edges, 0);
+    closefrm(edges);
     free_table_share(share);
     DBUG_RETURN(-1);
   }
@@ -763,7 +763,7 @@ int ha_oqgraph::close(void)
   if (have_table_share)
   {
     if (edges->file)
-      closefrm(edges, 0);
+      closefrm(edges);
     free_table_share(share);
     have_table_share = false;
   }

storage/spider/spd_sys_table.cc

@@ -227,7 +227,8 @@ void spider_close_sys_table(
     close_performance_schema_table(thd, open_tables_backup);
   } else {
     table->file->ha_reset();
-    closefrm(table, TRUE);
+    closefrm(table);
+    tdc_release_share(table->s);
     spider_free(spider_current_trx, table, MYF(0));
     thd->restore_backup_open_tables_state(open_tables_backup);
   }