post-merge fixes

test SHOW OPEN TABLES

mysql-test/r/show_check.result

@@ -90,3 +90,6 @@ t1	CREATE TABLE `t1` (
   `a` int(11) NOT NULL default '0',
   PRIMARY KEY  (`a`)
 ) TYPE=MyISAM
+Open_tables_in_test	Comment
+Open_tables_in_test	Comment
+t1	cached=1, in_use=0

mysql-test/t/show_check.test

@@ -72,3 +72,10 @@ drop table t1;
 create table t1 (a int not null, primary key (a));
 show create table t1;
 drop table t1;
+
+flush tables;
+show open tables;
+create table t1(n int);
+insert into t1 values (1);
+show open tables;
+drop table t1;

sql/mysql_priv.h

@@ -45,6 +45,7 @@ char *sql_strmake(const char *str,uint len);
 gptr sql_memdup(const void * ptr,unsigned size);
 void sql_element_free(void *ptr);
 void kill_one_thread(THD *thd, ulong id);
+char* query_table_status(THD *thd,const char *db,const char *table_name);
 
 #define x_free(A)	{ my_free((gptr) (A),MYF(MY_WME | MY_FAE | MY_ALLOW_ZERO_PTR)); }
 #define safeFree(x)	{ if(x) { my_free((gptr) x,MYF(0)); x = NULL; } }
@@ -373,7 +374,7 @@ Field *find_field_in_table(THD *thd,TABLE *table,const char *name,uint length,
 
 /* sql_list.c */
 int mysqld_show_dbs(THD *thd,const char *wild);
-int mysqld_show_open_tables(THD *thd,const char *wild);
+int mysqld_show_open_tables(THD *thd,const char *db,const char *wild);
 int mysqld_show_tables(THD *thd,const char *db,const char *wild);
 int mysqld_extend_show_tables(THD *thd,const char *db,const char *wild);
 int mysqld_show_fields(THD *thd,TABLE_LIST *table, const char *wild,
@@ -450,7 +451,8 @@ bool close_cached_tables(THD *thd, bool wait_for_refresh, TABLE_LIST *tables);
 void copy_field_from_tmp_record(Field *field,int offset);
 int fill_record(List<Item> &fields,List<Item> &values);
 int fill_record(Field **field,List<Item> &values);
-OPEN_TABLE_LIST *list_open_tables(THD *thd,const char *wild);
+int list_open_tables(THD *thd,List<char> *tables, const char *db,
+		     const char *wild);
 
 /* sql_calc.cc */
 bool eval_const_cond(COND *cond);

sql/sql_base.cc

@@ -34,8 +34,6 @@ HASH open_cache;				/* Used by mysql_test */
 
 static int open_unireg_entry(THD *thd,TABLE *entry,const char *db,
 			     const char *name, const char *alias, bool locked);
-static bool insert_fields(THD *thd,TABLE_LIST *tables, const char *db_name,
-			  const char *table_name, List_iterator<Item> *it);
 static void free_cache_entry(TABLE *entry);
 static void mysql_rm_tmp_tables(void);
 static key_map get_key_map_from_key_list(TABLE *table,
@@ -407,6 +405,47 @@ bool close_cached_tables(THD *thd, bool if_wait_for_refresh,
   DBUG_RETURN(result);
 }
 
+/* move one table to free list */
+ 
+bool close_thread_table(THD *thd, TABLE **table_ptr)
+{
+  DBUG_ENTER("close_thread_table");
+ 
+  bool found_old_table=0;
+  TABLE *table=*table_ptr;
+ 
+  *table_ptr=table->next;
+  if (table->version != refresh_version ||
+      thd->version != refresh_version || !table->db_stat)
+  {
+    VOID(hash_delete(&open_cache,(byte*) table));
+    found_old_table=1;
+  }
+  else
+  {
+    if (table->flush_version != flush_version)
+    {
+      table->flush_version=flush_version;
+      table->file->extra(HA_EXTRA_FLUSH);
+    }
+    else
+    {
+      // Free memory and reset for next loop
+      table->file->extra(HA_EXTRA_RESET);
+    }
+    table->in_use=0;
+    if (unused_tables)
+    {
+      table->next=unused_tables;                /* Link in last */
+      table->prev=unused_tables->prev;
+      unused_tables->prev=table;
+      table->prev->next=table;
+    }
+    else
+      unused_tables=table->next=table->prev=table;
+  }
+  DBUG_RETURN(found_old_table);
+}
 
 /* Put all tables used by thread in free list */
 
@@ -1832,7 +1871,7 @@ static key_map get_key_map_from_key_list(TABLE *table,
 **	Returns pointer to last inserted field if ok
 ****************************************************************************/
 
-static bool
+bool
 insert_fields(THD *thd,TABLE_LIST *tables, const char *db_name,
 	      const char *table_name, List_iterator<Item> *it)
 {

sql/sql_parse.cc

@@ -1819,6 +1819,7 @@ mysql_execute_command(void)
     }
 #endif
   case SQLCOM_SHOW_TABLES:
+  case SQLCOM_SHOW_OPEN_TABLES:
     /* FALL THROUGH */
 #ifdef DONT_ALLOW_SHOW_COMMANDS
     send_error(&thd->net,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
@@ -1840,7 +1841,10 @@ mysql_execute_command(void)
       if (check_access(thd,SELECT_ACL,db,&thd->col_access))
 	goto error;				/* purecov: inspected */
       /* grant is checked in mysqld_show_tables */
-      if (select_lex->options & SELECT_DESCRIBE)
+       if (lex->sql_command == SQLCOM_SHOW_OPEN_TABLES) 
+         res= mysqld_show_open_tables(thd, db,
+				 (lex->wild ? lex->wild->ptr() : NullS));
+      else if (select_lex->options & SELECT_DESCRIBE)
         res= mysqld_extend_show_tables(thd,db,
 				       (lex->wild ? lex->wild->ptr() : NullS));
       else
@@ -1849,9 +1853,6 @@ mysql_execute_command(void)
       break;
     }
 #endif
-  case SQLCOM_SHOW_OPEN_TABLES:
-    res= mysqld_show_open_tables(thd,(lex->wild ? lex->wild->ptr() : NullS));
-    break;
   case SQLCOM_SHOW_FIELDS:
 #ifdef DONT_ALLOW_SHOW_COMMANDS
     send_error(&thd->net,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */