Merge rkalimullin@bk-internal.mysql.com:/home/bk/mysql-4.0

into gw.mysql.r18.ru:/usr/home/ram/work/4.0.b2631

.bzrignore

@@ -545,3 +545,4 @@ vio/test-sslserver
 vio/viotest-ssl
 scripts/make_win_binary_distribution
 EXCEPTIONS-CLIENT
+support-files/my-innodb-heavy-4G.cnf

myisammrg/myrg_open.c

@@ -34,14 +34,17 @@ MYRG_INFO *myrg_open(const char *name, int mode, int handle_locking)
 {
   int save_errno,errpos=0;
   uint files=0,i,dir_length,length,key_parts;
-  ulonglong file_offset;
+  ulonglong file_offset=0;
   char name_buff[FN_REFLEN*2],buff[FN_REFLEN],*end;
   MYRG_INFO *m_info=0;
   File fd;
   IO_CACHE file;
   MI_INFO *isam=0;
+  uint found_merge_insert_method= 0;
   DBUG_ENTER("myrg_open");
 
+  LINT_INIT(key_parts);
+
   bzero((char*) &file,sizeof(file));
   if ((fd=my_open(fn_format(name_buff,name,"",MYRG_NAME_EXT,4),
 		  O_RDONLY | O_SHARE,MYF(0))) < 0)
@@ -69,10 +72,10 @@ MYRG_INFO *myrg_open(const char *name, int mode, int handle_locking)
       continue;		/* Skip empty lines */
     if (buff[0] == '#')
     {
-      if( !strncmp(buff+1,"INSERT_METHOD=",14))
+      if (!strncmp(buff+1,"INSERT_METHOD=",14))
       {			/* Lookup insert method */
 	int tmp=find_type(buff+15,&merge_insert_method,2);
-	m_info->merge_insert_method = (uint) (tmp >= 0 ? tmp : 0);
+	found_merge_insert_method = (uint) (tmp >= 0 ? tmp : 0);
       }
       continue;		/* Skip comments */
     }
@@ -85,7 +88,7 @@ MYRG_INFO *myrg_open(const char *name, int mode, int handle_locking)
     }
     if (!(isam=mi_open(buff,mode,(handle_locking?HA_OPEN_WAIT_IF_LOCKED:0))))
       goto err;
-    if (!m_info)
+    if (!m_info)                                /* First file */
     {
       key_parts=isam->s->base.key_parts;
       if (!(m_info= (MYRG_INFO*) my_malloc(sizeof(MYRG_INFO) +
@@ -97,15 +100,10 @@ MYRG_INFO *myrg_open(const char *name, int mode, int handle_locking)
       {
         m_info->open_tables=(MYRG_TABLE *) (m_info+1);
         m_info->rec_per_key_part=(ulong *) (m_info->open_tables+files);
+        m_info->tables= files;
+        files= 0;
       }
-      else
-      {
-        m_info->open_tables=0;
-        m_info->rec_per_key_part=0;
-      }
-      m_info->tables=files;
       m_info->reclength=isam->s->base.reclength;
-      file_offset=files=0;
       errpos=3;
     }
     m_info->open_tables[files].table= isam;
@@ -122,14 +120,16 @@ MYRG_INFO *myrg_open(const char *name, int mode, int handle_locking)
     m_info->del+= isam->state->del;
     m_info->data_file_length+= isam->state->data_file_length;
     for (i=0; i < key_parts; i++)
-      m_info->rec_per_key_part[i]+=isam->s->state.rec_per_key_part[i] / m_info->tables;
+      m_info->rec_per_key_part[i]+= (isam->s->state.rec_per_key_part[i] /
+                                     m_info->tables);
   }
 
   if (!m_info && !(m_info= (MYRG_INFO*) my_malloc(sizeof(MYRG_INFO),
-                                           MYF(MY_WME|MY_ZEROFILL))))
+                                                  MYF(MY_WME | MY_ZEROFILL))))
     goto err;
   /* Don't mark table readonly, for ALTER TABLE ... UNION=(...) to work */
   m_info->options&= ~(HA_OPTION_COMPRESS_RECORD | HA_OPTION_READ_ONLY_DATA);
+  m_info->merge_insert_method= found_merge_insert_method;
 
   if (sizeof(my_off_t) == 4 && file_offset > (ulonglong) (ulong) ~0L)
   {

mysql-test/r/union.result

@@ -88,7 +88,6 @@ explain (select a,b from t1 limit 2)  union all (select a,b from t2 order by a l
 table	type	possible_keys	key	key_len	ref	rows	Extra
 t1	ALL	NULL	NULL	NULL	NULL	4	
 t2	ALL	NULL	NULL	NULL	NULL	4	Using filesort
-t1	ALL	NULL	NULL	NULL	NULL	4	
 (select sql_calc_found_rows  a,b from t1 limit 2)  union all (select a,b from t2 order by a) limit 2;
 a	b
 1	a
@@ -420,6 +419,7 @@ a
 (SELECT * FROM t1) UNION all (SELECT SQL_CALC_FOUND_ROWS * FROM t2) LIMIT 1;
 Wrong usage/placement of 'SQL_CALC_FOUND_ROWS'
 create temporary table t1 select a from t1 union select a from t2;
+drop table t1;
 create table t1 select a from t1 union select a from t2;
 INSERT TABLE 't1' isn't allowed in FROM table list
 select a from t1 union select a from t2 order by t2.a;
@@ -429,3 +429,10 @@ select length(version()) > 1 as `*` UNION select 2;
 *
 1
 2
+create table t1 (a int);
+insert into t1 values (0), (3), (1), (2);
+explain (select * from t1) union (select * from t1) order by a;
+table	type	possible_keys	key	key_len	ref	rows	Extra
+t1	ALL	NULL	NULL	NULL	NULL	4	
+t1	ALL	NULL	NULL	NULL	NULL	4	
+drop table t1;

mysql-test/t/union.test

@@ -224,6 +224,7 @@ SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY a desc LIMIT 1;
 (SELECT * FROM t1) UNION all (SELECT SQL_CALC_FOUND_ROWS * FROM t2) LIMIT 1;
 
 create temporary table t1 select a from t1 union select a from t2;
+drop table t1;
 --error 1093
 create table t1 select a from t1 union select a from t2;
 --error 1054
@@ -236,3 +237,11 @@ drop table t1,t2;
 
 select length(version()) > 1 as `*` UNION select 2;
 
+#
+# Bug #4980: problem with explain
+#
+
+create table t1 (a int);
+insert into t1 values (0), (3), (1), (2);
+explain (select * from t1) union (select * from t1) order by a;
+drop table t1;

sql/Makefile.am

@@ -108,7 +108,7 @@ gen_lex_hash.o:		gen_lex_hash.cc lex.h
 sql_yacc.cc:	sql_yacc.yy
 sql_yacc.h:	sql_yacc.yy
 
-sql_yacc.o:	sql_yacc.cc sql_yacc.h
+sql_yacc.o:	sql_yacc.cc sql_yacc.h $(noinst_HEADERS)
 		@echo "Note: The following compile may take a long time."
 		@echo "If it fails, re-run configure with --with-low-memory"
 		$(CXXCOMPILE) $(LM_CFLAGS) -c $<

sql/log.cc

@@ -1682,22 +1682,6 @@ void MYSQL_LOG::set_max_size(ulong max_size_arg)
 }
 
 
-Disable_binlog::Disable_binlog(THD *thd_arg) : 
-  thd(thd_arg),
-  save_options(thd_arg->options), save_master_access(thd_arg->master_access)
-{
-  thd_arg->options&= ~OPTION_BIN_LOG;
-  thd_arg->master_access|= SUPER_ACL; // unneeded in 4.1
-};
-
-
-Disable_binlog::~Disable_binlog()
-{
-  thd->options= save_options;
-  thd->master_access= save_master_access;
-}
-
-
 /*
   Check if a string is a valid number
 
@@ -1761,15 +1745,21 @@ void print_buffer_to_file(enum loglevel level, const char *buffer)
   skr=time(NULL);
   localtime_r(&skr, &tm_tmp);
   start=&tm_tmp;
+#if MYSQL_VERSION_ID > 40100
   fprintf(stderr, "%02d%02d%02d %2d:%02d:%02d  [%s] %s\n",
+#else
+  fprintf(stderr, "%02d%02d%02d %2d:%02d:%02d %s\n",
+#endif
           start->tm_year % 100,
           start->tm_mon+1,
           start->tm_mday,
           start->tm_hour,
           start->tm_min,
           start->tm_sec,
+#if MYSQL_VERSION_ID > 40100
           (level == ERROR_LEVEL ? "ERROR" : level == WARNING_LEVEL ?
            "WARNING" : "INFORMATION"),
+#endif
           buffer);
 
   fflush(stderr);

sql/sql_class.h

@@ -638,27 +638,6 @@ public:
 #define SYSTEM_THREAD_SLAVE_IO 2
 #define SYSTEM_THREAD_SLAVE_SQL 4
 
-/*
-  Disables binary logging for one thread, and resets it back to what it was
-  before being disabled. 
-  Some functions (like the internal mysql_create_table() when it's called by
-  mysql_alter_table()) must NOT write to the binlog (binlogging is done at the
-  at a later stage of the command already, and must be, for locking reasons);
-  so we internally disable it temporarily by creating the Disable_binlog
-  object and reset the state by destroying the object (don't forget that! or
-  write code so that the object gets automatically destroyed when leaving a
-  block, see example in sql_table.cc).
-*/
-class Disable_binlog {
-private:
-  THD *thd;
-  ulong save_options;
-  ulong save_master_access;
-public:
-  Disable_binlog(THD *thd_arg);
-  ~Disable_binlog();
-};
-
 /*
   Used to hold information about file and file structure in exchainge 
   via non-DB file (...INTO OUTFILE..., ...LOAD DATA...)

sql/sql_table.cc

@@ -30,6 +30,16 @@
 #include <io.h>
 #endif
 
+#include "sql_acl.h" // for SUPER_ACL
+# define tmp_disable_binlog(A)                                          \
+  ulong save_options= (A)->options, save_master_access= (A)->master_access; \
+  (A)->options&= ~OPTION_BIN_LOG;                                       \
+  (A)->master_access|= SUPER_ACL; /* unneeded in 4.1 */                 
+
+#define reenable_binlog(A)                      \
+  (A)->options= save_options;                   \
+  (A)->master_access= save_master_access;       
+
 extern HASH open_cache;
 static const char *primary_key_name="PRIMARY";
 
@@ -840,9 +850,8 @@ TABLE *create_table_from_items(THD *thd, HA_CREATE_INFO *create_info,
 			       MYSQL_LOCK **lock)
 {
   TABLE tmp_table;		// Used during 'create_field()'
-  TABLE *table;
+  TABLE *table= 0;
   tmp_table.table_name=0;
-  Disable_binlog disable_binlog(thd);
   DBUG_ENTER("create_table_from_items");
 
   /* Add selected items to field list */
@@ -872,23 +881,25 @@ TABLE *create_table_from_items(THD *thd, HA_CREATE_INFO *create_info,
     extra_fields->push_back(cr_field);
   }
   /* create and lock table */
-  /* QQ: This should be done atomic ! */
-  /* We don't log the statement, it will be logged later */
-  if (mysql_create_table(thd,db,name,create_info,*extra_fields,
-			 *keys,0))
-    DBUG_RETURN(0);
+  /* QQ: create and open should be done atomic ! */
   /*
+    We don't log the statement, it will be logged later.
     If this is a HEAP table, the automatic DELETE FROM which is written to the
     binlog when a HEAP table is opened for the first time since startup, must
     not be written: 1) it would be wrong (imagine we're in CREATE SELECT: we
     don't want to delete from it) 2) it would be written before the CREATE
-    TABLE, which is a wrong order. So we keep binary logging disabled.
+    TABLE, which is a wrong order. So we keep binary logging disabled when we
+    open_table().
   */
-  if (!(table=open_table(thd,db,name,name,(bool*) 0)))
+  tmp_disable_binlog(thd);
+  if (!mysql_create_table(thd,db,name,create_info,*extra_fields,*keys,0))
   {
+    if (!(table=open_table(thd,db,name,name,(bool*) 0)))
       quick_rm_table(create_info->db_type,db,table_case_name(create_info,name));
-    DBUG_RETURN(0);
   }
+  reenable_binlog(thd);
+  if (!table)
+    DBUG_RETURN(0);
   table->reginfo.lock_type=TL_WRITE;
   if (!((*lock)=mysql_lock_tables(thd,&table,1)))
   {
@@ -1925,14 +1936,12 @@ int mysql_alter_table(THD *thd,char *new_db, char *new_name,
   else
     create_info->data_file_name=create_info->index_file_name=0;
   {
-    /*
-      We don't log the statement, it will be logged later. Using a block so
-      that disable_binlog is deleted when we leave it in either way.
-    */
-    Disable_binlog disable_binlog(thd);
-    if ((error=mysql_create_table(thd, new_db, tmp_name,
-                                  create_info,
-                                  create_list,key_list,1)))
+    /* We don't log the statement, it will be logged later. */
+    tmp_disable_binlog(thd);
+    error= mysql_create_table(thd, new_db, tmp_name,
+                              create_info,create_list,key_list,1);
+    reenable_binlog(thd);
+    if (error)
       DBUG_RETURN(error);
   }
   if (table->tmp_table)

sql/sql_union.cc

@@ -148,6 +148,10 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
   {
     ha_rows records_at_start;
     lex->select=sl;
+#if MYSQL_VERSION_ID < 40100
+    if (describe && sl->linkage == NOT_A_SELECT)
+      break;      // Skip extra item in case of 'explain'
+#endif
     /* Don't use offset for the last union if there is no braces */
     if (sl != lex_sl)
     {

sql/sql_yacc.yy

@@ -2917,7 +2917,7 @@ show_param:
 	    lex->select->select_limit= lex->thd->variables.select_limit;
 	    lex->select->offset_limit= 0L;
           } limit_clause
-	| keys_or_index FROM table_ident opt_db
+	| keys_or_index from_or_in table_ident opt_db
 	  {
 	    Lex->sql_command= SQLCOM_SHOW_KEYS;
 	    if ($4)