Post-merge post-merge fix (new error codes for fparser).

BitKeeper/etc/ignore:
  auto-union
BitKeeper/etc/logging_ok:
  auto-union
libmysqld/Makefile.am:
  Auto merged
mysql-test/r/func_group.result:
  Auto merged
mysql-test/r/subselect.result:
  Auto merged
sql/Makefile.am:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/set_var.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/share/czech/errmsg.txt:
  Auto merged
sql/share/danish/errmsg.txt:
  Auto merged
sql/share/dutch/errmsg.txt:
  Auto merged
sql/share/english/errmsg.txt:
  Auto merged
sql/share/estonian/errmsg.txt:
  Auto merged
sql/share/french/errmsg.txt:
  Auto merged
sql/share/german/errmsg.txt:
  Auto merged
sql/share/greek/errmsg.txt:
  Auto merged
sql/share/hungarian/errmsg.txt:
  Auto merged
sql/share/italian/errmsg.txt:
  Auto merged
sql/share/japanese/errmsg.txt:
  Auto merged
sql/share/korean/errmsg.txt:
  Auto merged
sql/share/norwegian-ny/errmsg.txt:
  Auto merged
sql/share/norwegian/errmsg.txt:
  Auto merged
sql/share/polish/errmsg.txt:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_select.h:
  Auto merged
sql/sql_show.cc:
  Auto merged
sql/sql_test.cc:
  Auto merged
sql/structs.h:
  Auto merged
sql/share/portuguese/errmsg.txt:
  Auto merged
sql/share/romanian/errmsg.txt:
  Auto merged
sql/share/russian/errmsg.txt:
  Auto merged
sql/share/serbian/errmsg.txt:
  Auto merged
sql/share/slovak/errmsg.txt:
  Auto merged
sql/share/spanish/errmsg.txt:
  Auto merged
sql/share/swedish/errmsg.txt:
  Auto merged
sql/share/ukrainian/errmsg.txt:
  Auto merged

.bzrignore

@@ -386,6 +386,7 @@ libmysqld/opt_ft.cc
 libmysqld/opt_range.cc
 libmysqld/opt_sum.cc
 libmysqld/pack.c
+libmysqld/parse_file.cc
 libmysqld/password.c
 libmysqld/procedure.cc
 libmysqld/protocol.cc

BitKeeper/etc/logging_ok

@@ -161,6 +161,7 @@ tim@sand.box
 tim@threads.polyesthetic.msg
 tim@white.box
 tim@work.mysql.com
+timour@mysql.com
 tom@basil-firewall.home.com
 tomas@mc05.(none)
 tonu@hundin.mysql.fi

include/my_sys.h

@@ -121,6 +121,13 @@ extern int NEAR my_errno;		/* Last error in mysys */
 #define MY_ERRNO_EDOM		33
 #define MY_ERRNO_ERANGE		34
 
+	/* Bits for get_date timeflag */
+#define GETDATE_DATE_TIME	1
+#define GETDATE_SHORT_DATE	2
+#define GETDATE_HHMMSSTIME	4
+#define GETDATE_GMT		8
+#define GETDATE_FIXEDLENGTH	16
+
 	/* defines when allocating data */
 #ifdef SAFEMALLOC
 #define my_malloc(SZ,FLAG) _mymalloc((SZ), __FILE__, __LINE__, FLAG )

include/mysqld_error.h

@@ -349,4 +349,9 @@
 #define ER_SP_VARCOND_AFTER_CURSHNDLR 1330
 #define ER_SP_CURSOR_AFTER_HANDLER 1331
 #define ER_SP_CASE_NOT_FOUND 1332
-#define ER_ERROR_MESSAGES 333
+#define ER_FPARSER_TOO_BIG_FILE 1333
+#define ER_FPARSER_BAD_HEADER 1334
+#define ER_FPARSER_EOF_IN_COMMENT 1335
+#define ER_FPARSER_ERROR_IN_PARAMETER 1336
+#define ER_FPARSER_EOF_IN_UNKNOWN_PARAMETER 1337
+#define ER_ERROR_MESSAGES 338

libmysqld/Makefile.am

@@ -58,7 +58,8 @@ sqlsources = derror.cc field.cc field_conv.cc strfunc.cc filesort.cc \
 	sql_update.cc sql_yacc.cc table.cc thr_malloc.cc time.cc \
 	unireg.cc uniques.cc stacktrace.c sql_union.cc hash_filo.cc \
 	spatial.cc gstream.cc sql_help.cc protocol_cursor.cc \
-	sp_head.cc sp_pcontext.cc sp.cc sp_cache.cc sp_rcontext.cc
+	sp_head.cc sp_pcontext.cc sp.cc sp_cache.cc sp_rcontext.cc \
+	parse_file.cc
 
 libmysqld_int_a_SOURCES= $(libmysqld_sources) $(libmysqlsources) $(sqlsources)
 libmysqld_a_SOURCES=

mysql-test/r/distinct.result

@@ -388,8 +388,8 @@ SELECT DISTINCTROW email, shipcode FROM t1, t2 WHERE t1.infoID=t2.infoID;
 email	shipcode
 test1@testdomain.com	Z001
 test2@testdomain.com	Z001
-test3@testdomain.com	Z001
 test2@testdomain.com	R002
+test3@testdomain.com	Z001
 SELECT DISTINCTROW email FROM t1 ORDER BY dateentered DESC;
 email
 test1@testdomain.com

mysql-test/r/func_group.result

@@ -183,12 +183,12 @@ insert into t2 values('BBB', 20, 1.0);
 select t1.a1, t1.a2, t2.a1, t2.a2 from t1,t2;
 a1	a2	a1	a2
 10	aaa	AAA	10
-10	NULL	AAA	10
-10	bbb	AAA	10
-20	zzz	AAA	10
 10	aaa	BBB	20
+10	NULL	AAA	10
 10	NULL	BBB	20
+10	bbb	AAA	10
 10	bbb	BBB	20
+20	zzz	AAA	10
 20	zzz	BBB	20
 select max(t1.a1), max(t2.a1) from t1, t2 where t2.a2=9;
 max(t1.a1)	max(t2.a1)

mysql-test/r/select.result

@@ -1393,8 +1393,8 @@ companynr	companynr
 41	40
 explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1199	Using temporary
-1	SIMPLE	t4	index	NULL	PRIMARY	1	NULL	12	Using where; Using index
+1	SIMPLE	t4	index	NULL	PRIMARY	1	NULL	12	Using index; Using temporary
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1199	Using where
 select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
 fld1	companynr	fld3	period
 038008	37	reporters	1008
@@ -2314,8 +2314,8 @@ left join t4 on id3 = id4 where id2 = 1 or id4 = 1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t3	system	NULL	NULL	NULL	NULL	0	const row not found
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
-1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1	
-1	SIMPLE	t4	ALL	id4	NULL	NULL	NULL	1	Using where
+1	SIMPLE	t4	ALL	id4	NULL	NULL	NULL	1	
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	1	Using where
 select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3
 left join t4 on id3 = id4 where id2 = 1 or id4 = 1;
 id1	id2	id3	id4	id44

mysql-test/r/subselect.result

@@ -1348,8 +1348,8 @@ a
 explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t2	index	NULL	a	5	NULL	4	Using where; Using index
-2	DEPENDENT SUBQUERY	t1	ref	a	a	5	func	1001	Using where; Using index
-2	DEPENDENT SUBQUERY	t3	index	a	a	5	NULL	3	Using where; Using index
+2	DEPENDENT SUBQUERY	t3	index	a	a	5	NULL	3	Using index
+2	DEPENDENT SUBQUERY	t1	ref	a	a	10	func,test.t3.a	1000	Using where; Using index
 Warnings:
 Note	1003	select high_priority test.t2.a AS `a` from test.t2 where <in_optimizer>(test.t2.a,<exists>(select 1 AS `Not_used` from test.t1 join test.t3 where ((test.t1.b = test.t3.a) and (<cache>(test.t2.a) = test.t1.a))))
 insert into t1 values (3,31);

mysys/mf_getdate.c

@@ -19,11 +19,20 @@
 #include "mysys_priv.h"
 #include <m_string.h>
 
-	/*
-	  If flag & 1 Return date and time
-	  If flag & 2 Return short date format YYMMDD
-	  if flag & 4 Return time in HHMMDD format.
-	  */
+/*
+  get date as string
+
+  SYNOPSIS
+    get_date()
+    to   - string where date will be written
+    flag - format of date:
+	  If flag & GETDATE_TIME	Return date and time
+	  If flag & GETDATE_SHORT_DATE	Return short date format YYMMDD
+	  If flag & GETDATE_HHMMSSTIME	Return time in HHMMDD format.
+	  If flag & GETDATE_GMT		Date/time in GMT
+	  If flag & GETDATE_FIXEDLENGTH	Return fixed length date/time
+    date - for conversion
+*/
 
 
 void get_date(register my_string to, int flag, time_t date)
@@ -36,27 +45,36 @@ void get_date(register my_string to, int flag, time_t date)
 
    skr=date ? (time_t) date : time((time_t*) 0);
 #if defined(HAVE_LOCALTIME_R) && defined(_REENTRANT)
+   if (flag & GETDATE_GMT)
      localtime_r(&skr,&tm_tmp);
+   else
+     gmtime_r(&skr,&tm_tmp);
    start_time= &tm_tmp;
 #else
-   start_time=localtime(&skr);
+   if (flag & GETDATE_GMT)
+     start_time= localtime(&skr);
+   else
+     gmtime(&skr,&tm_tmp);
 #endif
-   if (flag & 2)
+   if (flag & GETDATE_SHORT_DATE)
      sprintf(to,"%02d%02d%02d",
 	     start_time->tm_year % 100,
 	     start_time->tm_mon+1,
 	     start_time->tm_mday);
    else
-     sprintf(to,"%d-%02d-%02d",
+     sprintf(to, ((flag & GETDATE_FIXEDLENGTH) ?
+		  "%4d-%02d-%02d" : "%d-%02d-%02d"),
 	     start_time->tm_year+1900,
 	     start_time->tm_mon+1,
 	     start_time->tm_mday);
-   if (flag & 1)
-     sprintf(strend(to)," %2d:%02d:%02d",
+   if (flag & GETDATE_DATE_TIME)
+     sprintf(strend(to),
+	     ((flag & GETDATE_FIXEDLENGTH) ?
+	      " %02d:%02d:%02d" : " %2d:%02d:%02d"),
 	     start_time->tm_hour,
 	     start_time->tm_min,
 	     start_time->tm_sec);
-   else if (flag & 4)
+   else if (flag & GETDATE_HHMMSSTIME)
      sprintf(strend(to),"%02d%02d%02d",
 	     start_time->tm_hour,
 	     start_time->tm_min,

sql/Makefile.am

@@ -59,7 +59,8 @@ noinst_HEADERS =	item.h item_func.h item_sum.h item_cmpfunc.h \
 			stacktrace.h sql_sort.h sql_cache.h set_var.h \
 			spatial.h gstream.h client_settings.h \
 			examples/ha_example.h \
-			sp_head.h sp_pcontext.h sp_rcontext.h sp.h sp_cache.h
+			sp_head.h sp_pcontext.h sp_rcontext.h sp.h sp_cache.h \
+			parse_file.h			
 mysqld_SOURCES =	sql_lex.cc sql_handler.cc \
 			item.cc item_sum.cc item_buff.cc item_func.cc \
 			item_cmpfunc.cc item_strfunc.cc item_timefunc.cc \
@@ -91,7 +92,7 @@ mysqld_SOURCES =	sql_lex.cc sql_handler.cc \
 			gstream.cc spatial.cc sql_help.cc protocol_cursor.cc \
 			examples/ha_example.cc \
 			sp_head.cc sp_pcontext.cc  sp_rcontext.cc sp.cc \
-			sp_cache.cc
+			sp_cache.cc parse_file.cc
 gen_lex_hash_SOURCES =	gen_lex_hash.cc
 gen_lex_hash_LDADD =	$(LDADD) $(CXXLDFLAGS)
 

sql/mysql_priv.h

@@ -375,6 +375,7 @@ inline THD *_current_thd(void)
 #include "sql_list.h"
 #include "sql_map.h"
 #include "handler.h"
+#include "parse_file.h"
 #include "table.h"
 #include "field.h"				/* Field definitions */
 #include "protocol.h"
@@ -787,6 +788,8 @@ extern "C" pthread_handler_decl(handle_manager, arg);
 void print_where(COND *cond,const char *info);
 void print_cached_tables(void);
 void TEST_filesort(SORT_FIELD *sortorder,uint s_length);
+void print_plan(JOIN* join, double read_time, double record_count,
+                uint idx, const char *info);
 #endif
 void mysql_print_status(THD *thd);
 /* key.cc */
@@ -854,6 +857,7 @@ extern char language[LIBLEN],reg_ext[FN_EXTLEN];
 extern char glob_hostname[FN_REFLEN], mysql_home[FN_REFLEN];
 extern char pidfile_name[FN_REFLEN], time_zone[30], *opt_init_file;
 extern char log_error_file[FN_REFLEN];
+extern double last_query_cost;
 extern double log_10[32];
 extern ulonglong log_10_int[20];
 extern ulonglong keybuff_size;

sql/mysqld.cc

@@ -312,6 +312,7 @@ ulong expire_logs_days = 0;
 ulong rpl_recovery_rank=0;
 ulong my_bind_addr;			/* the address we bind to */
 volatile ulong cached_thread_count= 0;
+double last_query_cost= -1; /* -1 denotes that no query was compiled yet */
 
 double log_10[32];			/* 10 potences */
 ulonglong log_10_int[20]=
@@ -3775,7 +3776,9 @@ enum options_mysqld
   OPT_DATE_FORMAT,
   OPT_TIME_FORMAT,
   OPT_DATETIME_FORMAT,
-  OPT_LOG_QUERIES_NOT_USING_INDEXES
+  OPT_LOG_QUERIES_NOT_USING_INDEXES,
+  OPT_PLAN_SEARCH_DEPTH,
+  OPT_HEURISTIC
 };
 
 
@@ -4400,6 +4403,11 @@ log and this option does nothing anymore.",
     "Use stopwords from this file instead of built-in list.",
     (gptr*) &ft_stopword_file, (gptr*) &ft_stopword_file, 0, GET_STR,
     REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
+  {"heuristic", OPT_HEURISTIC,
+   "Controls the heuristic(s) applied during query optimization to prune less-promising partial plans from the optimizer search space. Meaning: 0 - do not apply any heuristic, thus perform exhaustive search; 1 - prune plans based on rows and read time.",
+   (gptr*) &global_system_variables.heuristic,
+   (gptr*) &max_system_variables.heuristic,
+   0, GET_ULONG, OPT_ARG, 1, 0, 1, 0, 1, 0},
 #ifdef HAVE_INNOBASE_DB
   {"innodb_mirrored_log_groups", OPT_INNODB_MIRRORED_LOG_GROUPS,
    "Number of identical copies of log groups we keep for the database. Currently this should be set to 1.",
@@ -4640,6 +4648,11 @@ The minimum value for this variable is 4096.",
    "If this is not 0, then mysqld will use this value to reserve file descriptors to use with setrlimit(). If this value is 0 then mysqld will reserve max_connections*5 or max_connections + table_cache*2 (whichever is larger) number of files.",
    (gptr*) &open_files_limit, (gptr*) &open_files_limit, 0, GET_ULONG,
    REQUIRED_ARG, 0, 0, OS_FILE_LIMIT, 0, 1, 0},
+  {"plan_search_depth", OPT_PLAN_SEARCH_DEPTH,
+   "Maximum depth of search performed by the query optimizer. Values larger than the number of relations in a query result in better query plans, but take longer to compile a query. Smaller values than the number of tables in a relation result in faster optimization, but may produce very bad query plans. If set to 0, the system will automatically pick a reasonable value; if set to MAX_TABLES+2, the optimizer will switch to the original find_best (used for testing/comparison).",
+   (gptr*) &global_system_variables.plan_search_depth,
+   (gptr*) &max_system_variables.plan_search_depth,
+   0, GET_ULONG, OPT_ARG, MAX_TABLES+1, 0, MAX_TABLES+2, 0, 1, 0},
    {"preload_buffer_size", OPT_PRELOAD_BUFFER_SIZE,
     "The size of the buffer that is allocated when preloading indexes",
     (gptr*) &global_system_variables.preload_buff_size,
@@ -4930,6 +4943,7 @@ struct show_var_st status_vars[]= {
    SHOW_KEY_CACHE_LONG},
   {"Key_writes",               (char*) &dflt_key_cache_var.global_cache_write,
    SHOW_KEY_CACHE_LONG},
+  {"Last_query_cost",          (char*) &last_query_cost,        SHOW_DOUBLE},
   {"Max_used_connections",     (char*) &max_used_connections,  SHOW_LONG},
   {"Not_flushed_delayed_rows", (char*) &delayed_rows_in_use,    SHOW_LONG_CONST},
   {"Open_files",               (char*) &my_file_opened,         SHOW_LONG_CONST},

sql/parse_file.h

+/* -*- C++ -*- */
+/* Copyright (C) 2004 MySQL AB
+
+   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
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+#ifndef _PARSE_FILE_H_
+#define _PARSE_FILE_H_
+
+#define PARSE_FILE_TIMESTAMPLENGTH 19
+
+typedef enum {
+  FILE_OPTIONS_STRING,		/* String (LEX_STRING) */
+  FILE_OPTIONS_ESTRING,		/* Escaped string (LEX_STRING) */
+  FILE_OPTIONS_ULONGLONG,	/* ulonglong parapeter (ulonglong) */
+  FILE_OPTIONS_REV,		/* Revision version number (ulonglong) */
+  FILE_OPTIONS_TIMESTAMP,	/* timestamp (LEX_STRING have to be
+				   allocated with length 20 (19+1) */
+  FILE_OPTIONS_STRLIST		/* list of strings (List<char*>) */
+} file_opt_type;
+  
+struct File_option
+{
+  const LEX_STRING name;		/* Name of the option */
+  int offset;				/* offset to base address of value */
+  enum file_opt_type type;		/* Option type */
+};
+
+class File_parser;
+File_parser *sql_parse_prepare(const LEX_STRING *file_name,
+			       MEM_ROOT *mem_root);
+
+my_bool
+sql_create_definition_file(const LEX_STRING *dir, const  LEX_STRING *file_name,
+			   const LEX_STRING *type,
+			   gptr base, File_option *parameters, uint versions);
+
+class File_parser: public Sql_alloc
+{
+  char *buff, *start, *end;
+  LEX_STRING file_type;
+  my_bool content_ok;
+public:
+  File_parser() :buff(0), start(0), end(0), content_ok(0)
+    { file_type.str= 0; file_type.length= 0; }
+
+  my_bool ok() { return content_ok; }
+  LEX_STRING *type() { return &file_type; }
+  my_bool parse(gptr base, MEM_ROOT *mem_root,
+		struct File_option *parameters, uint required);
+
+  friend File_parser *sql_parse_prepare(const LEX_STRING *file_name,
+					MEM_ROOT *mem_root,
+					bool bad_format_errors);
+};
+
+#endif /* _PARSE_FILE_H_ */

sql/set_var.cc

@@ -160,6 +160,7 @@ sys_var_str             sys_ft_boolean_syntax("ft_boolean_syntax",
                                          sys_update_ftb_syntax,
                                          sys_default_ftb_syntax,
                                          ft_boolean_syntax);
+sys_var_thd_ulong       sys_heuristic("heuristic", &SV::heuristic);
 sys_var_str             sys_init_connect("init_connect", 0,
                                          sys_update_init_connect,
                                          sys_default_init_connect,0);
@@ -262,6 +263,8 @@ sys_var_thd_ulong	sys_net_retry_count("net_retry_count",
 					    0, fix_net_retry_count);
 sys_var_thd_bool	sys_new_mode("new", &SV::new_mode);
 sys_var_thd_bool	sys_old_passwords("old_passwords", &SV::old_passwords);
+sys_var_thd_ulong       sys_plan_search_depth("plan_search_depth",
+                                              &SV::plan_search_depth);
 sys_var_thd_ulong       sys_preload_buff_size("preload_buffer_size",
                                               &SV::preload_buff_size);
 sys_var_thd_ulong	sys_read_buff_size("read_buffer_size",
@@ -488,6 +491,7 @@ sys_var *sys_variables[]=
   &sys_ft_boolean_syntax,
   &sys_foreign_key_checks,
   &sys_group_concat_max_len,
+  &sys_heuristic,
   &sys_identity,
   &sys_init_connect,
   &sys_init_slave,
@@ -536,6 +540,7 @@ sys_var *sys_variables[]=
   &sys_net_write_timeout,
   &sys_new_mode,
   &sys_old_passwords,
+  &sys_plan_search_depth,
   &sys_preload_buff_size,
   &sys_pseudo_thread_id,
   &sys_query_alloc_block_size,
@@ -812,6 +817,8 @@ struct show_var_st init_vars[]= {
   {"version_compile_machine", (char*) MACHINE_TYPE,		    SHOW_CHAR},
   {sys_os.name,		      (char*) &sys_os,			    SHOW_SYS},
   {sys_net_wait_timeout.name, (char*) &sys_net_wait_timeout,	    SHOW_SYS},
+  {sys_heuristic.name,        (char*) &sys_heuristic,               SHOW_SYS},
+  {sys_plan_search_depth.name,(char*) &sys_plan_search_depth,       SHOW_SYS},
   {NullS, NullS, SHOW_LONG}
 };
 

sql/share/czech/errmsg.txt

@@ -345,3 +345,8 @@ character-set=latin2
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/danish/errmsg.txt

@@ -339,3 +339,8 @@ character-set=latin1
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/dutch/errmsg.txt

@@ -347,3 +347,8 @@ character-set=latin1
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/english/errmsg.txt

@@ -336,3 +336,8 @@ character-set=latin1
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/estonian/errmsg.txt

@@ -341,3 +341,8 @@ character-set=latin7
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/french/errmsg.txt

@@ -336,3 +336,8 @@ character-set=latin1
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/german/errmsg.txt

@@ -348,3 +348,8 @@ character-set=latin1
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/greek/errmsg.txt

@@ -336,3 +336,8 @@ character-set=greek
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/hungarian/errmsg.txt

@@ -338,3 +338,8 @@ character-set=latin2
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/italian/errmsg.txt

@@ -336,3 +336,8 @@ character-set=latin1
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/japanese/errmsg.txt

@@ -338,3 +338,8 @@ character-set=ujis
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/korean/errmsg.txt

@@ -336,3 +336,8 @@ character-set=euckr
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/norwegian-ny/errmsg.txt

@@ -338,3 +338,8 @@ character-set=latin1
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/norwegian/errmsg.txt

@@ -338,3 +338,8 @@ character-set=latin1
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/polish/errmsg.txt

@@ -340,3 +340,8 @@ character-set=latin2
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/portuguese/errmsg.txt

@@ -337,3 +337,8 @@ character-set=latin1
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/romanian/errmsg.txt

@@ -340,3 +340,8 @@ character-set=latin2
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/russian/errmsg.txt

@@ -338,3 +338,8 @@ character-set=koi8r
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"    '%-.64s'"
+"    '%-.64s'"
+"     '%-.64s'"
+"    '%-.64s' (: '%-.64s')"
+"       '%-.64s'"

sql/share/serbian/errmsg.txt

@@ -330,3 +330,8 @@ character-set=cp1250
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/slovak/errmsg.txt

@@ -344,3 +344,8 @@ character-set=latin2
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/spanish/errmsg.txt

@@ -338,3 +338,8 @@ character-set=latin1
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/swedish/errmsg.txt

@@ -336,3 +336,8 @@ character-set=latin1
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"Configuration file '%-.64s' is too big"
+"Malformed file type header in file '%-.64s'"
+"Unexpected end of file during parsing comment '%-.64s'"
+"Error during parsing parameter '%-.64s' (line: '%-.64s')"
+"Unexpected end of file during skipping unknown parameter '%-.64s'"

sql/share/ukrainian/errmsg.txt

@@ -341,3 +341,8 @@ character-set=koi8u
 "Variable or condition declaration after cursor or handler declaration"
 "Cursor declaration after handler declaration"
 "Case not found for CASE statement"
+"  Ʀæ  '%-.64s'"
+"צ    ̦ '%-.64s'"
+"Ħ ˦   Ҧ '%-.64s'"
+"  ЦΦ  '%-.64s' (: '%-.64s')"
+"Ħ ˦   ¦  צ  '%-.64s'"

sql/sql_class.h

@@ -392,6 +392,8 @@ struct system_variables
   ulong table_type;
   ulong tmp_table_size;
   ulong tx_isolation;
+  ulong heuristic;
+  ulong plan_search_depth;
   /* Determines which non-standard SQL behaviour should be enabled */
   ulong sql_mode;
   ulong default_week_format;

sql/sql_select.h

@@ -116,6 +116,7 @@ typedef struct st_join_table {
 typedef struct st_position			/* Used in find_best */
 {
   double records_read;
+  double read_time;
   JOIN_TAB *table;
   KEYUSE *key;
 } POSITION;
@@ -133,8 +134,9 @@ typedef struct st_rollup
 class JOIN :public Sql_alloc
 {
  public:
-  JOIN_TAB *join_tab,**best_ref,**map2table;
-  JOIN_TAB *join_tab_save; //saved join_tab for subquery reexecution
+  JOIN_TAB *join_tab,**best_ref;
+  JOIN_TAB **map2table;    // mapping between table indexes and JOIN_TABs
+  JOIN_TAB *join_tab_save; // saved join_tab for subquery reexecution
   TABLE    **table,**all_tables,*sort_by_table;
   uint	   tables,const_tables;
   uint	   send_group_parts;

sql/sql_show.cc

@@ -1845,6 +1845,11 @@ int mysqld_show(THD *thd, const char *wild, show_var_st *variables,
         end= strend(pos);
         break;
       }
+      case SHOW_DOUBLE:
+      {
+        end= buff + sprintf(buff, "%f", *(double*) value);
+        break;
+      }
 #ifdef HAVE_OPENSSL
 	/* First group - functions relying on CTX */
       case SHOW_SSL_CTX_SESS_ACCEPT:

sql/sql_test.cc

@@ -232,6 +232,102 @@ TEST_join(JOIN *join)
   DBUG_VOID_RETURN;
 }
 
+
+/* 
+  Print the current state during query optimization.
+
+  SYNOPSIS
+    print_plan()
+    join         pointer to the structure providing all context info for
+                 the query
+    read_time    the cost of the best partial plan
+    record_count estimate for the number of records returned by the best
+                 partial plan
+    idx          length of the partial QEP in 'join->positions';
+                 also an index in the array 'join->best_ref';
+    info         comment string to appear above the printout
+
+  DESCRIPTION
+    This function prints to the log file DBUG_FILE the members of 'join' that
+    are used during query optimization (join->positions, join->best_positions,
+    and join->best_ref) and few other related variables (read_time,
+    record_count).
+    Useful to trace query optimizer functions.
+
+  RETURN
+    None
+*/
+
+void
+print_plan(JOIN* join, double read_time, double record_count,
+           uint idx, const char *info)
+{
+  uint i;
+  POSITION pos;
+  JOIN_TAB *join_table;
+  JOIN_TAB **plan_nodes;
+  TABLE*   table;
+
+  if (info == 0)
+    info= "";
+
+  DBUG_LOCK_FILE;
+  if (join->best_read == DBL_MAX)
+  {
+    fprintf(DBUG_FILE,"%s; idx:%u, best: DBL_MAX, current:%g\n",
+            info, idx, read_time);
+  }
+  else
+  {
+    fprintf(DBUG_FILE,"%s; idx: %u, best: %g, current: %g\n",
+            info, idx, join->best_read, read_time);
+  }
+
+  /* Print the tables in JOIN->positions */
+  fputs("     POSITIONS: ", DBUG_FILE);
+  for (i= 0; i < idx ; i++)
+  {
+    pos = join->positions[i];
+    table= pos.table->table;
+    if (table)
+      fputs(table->real_name, DBUG_FILE);
+    fputc(' ', DBUG_FILE);
+  }
+  fputc('\n', DBUG_FILE);
+
+  /*
+    Print the tables in JOIN->best_positions only if at least one complete plan
+    has been found. An indicator for this is the value of 'join->best_read'.
+  */
+  fputs("BEST_POSITIONS: ", DBUG_FILE);
+  if (join->best_read < DBL_MAX)
+  {
+    for (i= 0; i < idx ; i++)
+    {
+      pos= join->best_positions[i];
+      table= pos.table->table;
+      if (table)
+        fputs(table->real_name, DBUG_FILE);
+      fputc(' ', DBUG_FILE);
+    }
+  }
+  fputc('\n', DBUG_FILE);
+
+  /* Print the tables in JOIN->best_ref */
+  fputs("      BEST_REF: ", DBUG_FILE);
+  for (plan_nodes= join->best_ref ; *plan_nodes ; plan_nodes++)
+  {
+    join_table= (*plan_nodes);
+    fputs(join_table->table->real_name, DBUG_FILE);
+    fprintf(DBUG_FILE, "(%u,%u,%u)",
+            join_table->found_records, join_table->records, join_table->read_time);
+    fputc(' ', DBUG_FILE);
+  }
+  fputc('\n', DBUG_FILE);
+
+  DBUG_UNLOCK_FILE;
+}
+
 #endif
 
 typedef struct st_debug_lock

sql/structs.h

@@ -167,8 +167,8 @@ typedef struct st_known_date_time_format {
 enum SHOW_TYPE
 {
   SHOW_UNDEF,
-  SHOW_LONG, SHOW_LONGLONG, SHOW_INT, SHOW_CHAR, SHOW_CHAR_PTR, SHOW_BOOL,
-  SHOW_MY_BOOL, SHOW_OPENTABLES, SHOW_STARTTIME, SHOW_QUESTION,
+  SHOW_LONG, SHOW_LONGLONG, SHOW_INT, SHOW_CHAR, SHOW_CHAR_PTR, SHOW_DOUBLE,
+  SHOW_BOOL, SHOW_MY_BOOL, SHOW_OPENTABLES, SHOW_STARTTIME, SHOW_QUESTION,
   SHOW_LONG_CONST, SHOW_INT_CONST, SHOW_HAVE, SHOW_SYS, SHOW_HA_ROWS,
 #ifdef HAVE_OPENSSL
   SHOW_SSL_CTX_SESS_ACCEPT, 	SHOW_SSL_CTX_SESS_ACCEPT_GOOD,