Cleanups

- Avoid some realloc() during startup
- Ensure that file_key_management_plugin frees it's memory early, even if
  it's linked statically.
- Fixed compiler warnings from unused variables and missing destructors
- Fixed wrong indentation

mysys/my_default.c

@@ -565,7 +565,7 @@ int my_load_defaults(const char *conf_file, const char **groups,
   for (; *groups ; groups++)
     group.count++;
 
-  if (my_init_dynamic_array(&args, sizeof(char*),*argc, 32, MYF(0)))
+  if (my_init_dynamic_array(&args, sizeof(char*), 128, 64, MYF(0)))
     goto err;
 
   ctx.alloc= &alloc;

plugin/file_key_management/file_key_management_plugin.cc

@@ -169,6 +169,11 @@ static int file_key_management_plugin_init(void *p)
   return parser.parse(&keys);
 }
 
+static int file_key_management_plugin_deinit(void *p)
+{
+  keys.free_memory();
+}
+
 /*
   Plugin library descriptor
 */
@@ -181,7 +186,7 @@ maria_declare_plugin(file_key_management)
   "File-based key management plugin",
   PLUGIN_LICENSE_GPL,
   file_key_management_plugin_init,
-  NULL,
+  file_key_management_plugin_deinit,
   0x0100 /* 1.0 */,
   NULL,	/* status variables */
   settings,

sql/mysqld.cc

@@ -9427,7 +9427,8 @@ static int get_options(int *argc_ptr, char ***argv_ptr)
 
   /* prepare all_options array */
   my_init_dynamic_array(&all_options, sizeof(my_option),
-                        array_elements(my_long_options),
+                        array_elements(my_long_options) +
+                        sys_var_elements(),
                         array_elements(my_long_options)/4, MYF(0));
   add_many_options(&all_options, my_long_options, array_elements(my_long_options));
   sys_var_add_options(&all_options, 0);

sql/rpl_rli.h

@@ -347,10 +347,11 @@ class Relay_log_info : public Slave_reporting_capability
 
   rpl_parallel parallel;
   /*
-    The relay_log_state keeps track of the current binlog state of the execution
-    of the relay log. This is used to know where to resume current GTID position
-    if the slave thread is stopped and restarted.
-    It is only accessed from the SQL thread, so it does not need any locking.
+    The relay_log_state keeps track of the current binlog state of the
+    execution of the relay log. This is used to know where to resume
+    current GTID position if the slave thread is stopped and
+    restarted.  It is only accessed from the SQL thread, so it does
+    not need any locking.
   */
   rpl_binlog_state relay_log_state;
   /*

sql/set_var.cc

@@ -64,7 +64,7 @@ int sys_var_init()
   /* Must be already initialized. */
   DBUG_ASSERT(system_charset_info != NULL);
 
-  if (my_hash_init(&system_variable_hash, system_charset_info, 100, 0,
+  if (my_hash_init(&system_variable_hash, system_charset_info, 700, 0,
                    0, (my_hash_get_key) get_sys_var_length, 0, HASH_UNIQUE))
     goto error;
 
@@ -78,6 +78,11 @@ int sys_var_init()
   DBUG_RETURN(1);
 }
 
+uint sys_var_elements()
+{
+  return system_variable_hash.records;
+}
+
 int sys_var_add_options(DYNAMIC_ARRAY *long_options, int parse_flags)
 {
   uint saved_elements= long_options->elements;

sql/set_var.h

@@ -414,6 +414,7 @@ extern sys_var *Sys_autocommit_ptr;
 CHARSET_INFO *get_old_charset_by_name(const char *old_name);
 
 int sys_var_init();
+uint sys_var_elements();
 int sys_var_add_options(DYNAMIC_ARRAY *long_options, int parse_flags);
 void sys_var_end(void);
 

sql/sql_array.h

@@ -239,6 +239,11 @@ template <class Elem> class Dynamic_array
     delete_dynamic(&array);
   }
 
+  void free_memory()
+  {
+    delete_dynamic(&array);
+  }
+
   typedef int (*CMP_FUNC)(const Elem *el1, const Elem *el2);
 
   void sort(CMP_FUNC cmp_func)

sql/sql_plugin.cc

@@ -1544,22 +1544,26 @@ int plugin_init(int *argc, char **argv, int flags)
   init_alloc_root(&plugin_vars_mem_root, 4096, 4096, MYF(0));
   init_alloc_root(&tmp_root, 4096, 4096, MYF(0));
 
-  if (my_hash_init(&bookmark_hash, &my_charset_bin, 16, 0, 0,
+  if (my_hash_init(&bookmark_hash, &my_charset_bin, 32, 0, 0,
                    get_bookmark_hash_key, NULL, HASH_UNIQUE))
       goto err;
 
 
   mysql_mutex_init(key_LOCK_plugin, &LOCK_plugin, MY_MUTEX_INIT_FAST);
 
+  /*
+    The 80 is from 2016-04-27 when we had 71 default plugins
+    Big enough to avoid many mallocs even in future
+  */
   if (my_init_dynamic_array(&plugin_dl_array,
                             sizeof(struct st_plugin_dl *), 16, 16, MYF(0)) ||
       my_init_dynamic_array(&plugin_array,
-                            sizeof(struct st_plugin_int *), 16, 16, MYF(0)))
+                            sizeof(struct st_plugin_int *), 80, 32, MYF(0)))
     goto err;
 
   for (i= 0; i < MYSQL_MAX_PLUGIN_TYPE_NUM; i++)
   {
-    if (my_hash_init(&plugin_hash[i], system_charset_info, 16, 0, 0,
+    if (my_hash_init(&plugin_hash[i], system_charset_info, 32, 0, 0,
                      get_plugin_hash_key, NULL, HASH_UNIQUE))
       goto err;
   }

sql/sql_select.cc

@@ -2017,7 +2017,7 @@ JOIN::optimize_inner()
 	  TODO: Explain the quick_group part of the test below.
 	 */
         if ((ordered_index_usage != ordered_index_group_by) &&
-            (tmp_table_param.quick_group && !procedure || 
+            ((tmp_table_param.quick_group && !procedure) || 
 	     (tab->emb_sj_nest && 
 	      best_positions[const_tables].sj_strategy == SJ_OPT_LOOSE_SCAN)))
         {
@@ -3123,7 +3123,7 @@ void JOIN::save_explain_data(Explain_query *output, bool can_overwrite,
     Explain_union *eu= output->get_union(nr);
     explain= &eu->fake_select_lex_explain;
     join_tab[0].tracker= eu->get_fake_select_lex_tracker();
-    for (int i=0 ; i < top_join_tab_count + aggr_tables; i++)
+    for (uint i=0 ; i < top_join_tab_count + aggr_tables; i++)
     {
       if (join_tab[i].filesort)
       {
@@ -3360,23 +3360,25 @@ JOIN::destroy()
 
   cleanup(1);
 
-  uint tables= table_count+aggr_tables;
-
-  if (join_tab) // We should not have tables > 0 and join_tab != NULL
-   for (JOIN_TAB *tab= first_linear_tab(this, WITH_BUSH_ROOTS, WITH_CONST_TABLES);
-        tab; tab= next_linear_tab(this, tab, WITH_BUSH_ROOTS))
+  if (join_tab)
   {
-    if (tab->aggr)
+    DBUG_ASSERT(table_count+aggr_tables > 0);
+    for (JOIN_TAB *tab= first_linear_tab(this, WITH_BUSH_ROOTS,
+                                         WITH_CONST_TABLES);
+         tab; tab= next_linear_tab(this, tab, WITH_BUSH_ROOTS))
     {
-      free_tmp_table(thd, tab->table);
-      delete tab->tmp_table_param;
-      tab->tmp_table_param= NULL;
-      tab->aggr= NULL;
+      if (tab->aggr)
+      {
+        free_tmp_table(thd, tab->table);
+        delete tab->tmp_table_param;
+        tab->tmp_table_param= NULL;
+        tab->aggr= NULL;
+      }
+      tab->table= NULL;
     }
-
-    tab->table= NULL;
   }
- /* Cleanup items referencing temporary table columns */
+
+  /* Cleanup items referencing temporary table columns */
   cleanup_item_list(tmp_all_fields1);
   cleanup_item_list(tmp_all_fields3);
   destroy_sj_tmp_tables(this);
@@ -24426,9 +24428,6 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
   DBUG_ENTER("select_describe");
 
   /* Update the QPF with latest values of using_temporary, using_filesort */
-  Explain_select *explain_sel;
-  uint select_nr= join->select_lex->select_number;
-
   for (SELECT_LEX_UNIT *unit= join->select_lex->first_inner_unit();
        unit;
        unit= unit->next_unit())

sql/sql_show.cc

@@ -3044,7 +3044,7 @@ int add_status_vars(SHOW_VAR *list)
   if (status_vars_inited)
     mysql_mutex_lock(&LOCK_show_status);
   if (!all_status_vars.buffer && // array is not allocated yet - do it now
-      my_init_dynamic_array(&all_status_vars, sizeof(SHOW_VAR), 200, 20, MYF(0)))
+      my_init_dynamic_array(&all_status_vars, sizeof(SHOW_VAR), 250, 50, MYF(0)))
   {
     res= 1;
     goto err;

sql/sql_window.cc

@@ -577,6 +577,8 @@ class Rowid_seq_cursor
   uint ref_length;
 
 public:
+  virtual ~Rowid_seq_cursor() {}
+
   void init(READ_RECORD *info)
   {
     cache_start= info->cache_pos;
@@ -631,6 +633,7 @@ class Table_read_cursor : public Rowid_seq_cursor
   */
   READ_RECORD *read_record;
 public:
+  virtual ~Table_read_cursor() {}
 
   void init(READ_RECORD *info)
   {

sql/sql_window.h

@@ -89,8 +89,8 @@ class Window_frame : public Sql_alloc
 class Window_spec : public Sql_alloc
 {
   bool window_names_are_checked;
-
  public:
+  virtual ~Window_spec() {}
 
   LEX_STRING *window_ref;