merge

mysql-test/extra/binlog_tests/binlog.test

@@ -270,3 +270,42 @@ INSERT INTO test.t1 VALUES (1), (2);
 CREATE TABLE test.t2 SELECT * FROM test.t1;
 USE test;
 DROP TABLES t1, t2;
+
+#
+# Bug#46640
+# This test verifies if the server_id stored in the "format 
+# description BINLOG statement" will override the server_id 
+# of the server executing the statements.
+#
+
+connect (fresh,localhost,root,,test);
+connection fresh;
+
+RESET MASTER;
+CREATE TABLE t1 (a INT PRIMARY KEY);
+
+# Format description event, with server_id = 10;
+BINLOG '
+3u9kSA8KAAAAZgAAAGoAAAABAAQANS4xLjM1LW1hcmlhLWJldGExLWRlYnVnLWxvZwAAAAAAAAAA
+AAAAAAAAAAAAAAAAAADe72RIEzgNAAgAEgAEBAQEEgAAUwAEGggAAAAICAgC
+';
+
+# What server_id is logged for a statement? Should be our own, not the
+# one from the format description event.
+INSERT INTO t1 VALUES (1);
+
+# INSERT INTO t1 VALUES (2), with server_id=20. Check that this is logged
+# with our own server id, not the 20 from the BINLOG statement.
+BINLOG '
+3u9kSBMUAAAAKQAAAJEBAAAAABoAAAAAAAAABHRlc3QAAnQxAAEDAAA=
+3u9kSBcUAAAAIgAAALMBAAAQABoAAAAAAAEAAf/+AgAAAA==
+';
+
+# Show binlog events to check that server ids are correct.
+--replace_column 1 # 2 # 5 #
+--replace_regex /Server ver: .*, Binlog ver: .*/Server ver: #, Binlog ver: #/ /table_id: [0-9]+/table_id: #/
+SHOW BINLOG EVENTS;
+
+DROP TABLE t1;
+disconnect fresh;
+

mysql-test/r/func_group.result

@@ -1477,3 +1477,47 @@ COUNT(*)
 SET SQL_MODE=default;
 DROP TABLE t1;
 End of 5.0 tests
+#
+# BUG#47280 - strange results from count(*) with order by multiple 
+#             columns without where/group
+# 
+# 
+# Initialize test
+# 
+CREATE TABLE t1 (
+pk INT NOT NULL,
+i INT,
+PRIMARY KEY (pk)
+);
+INSERT INTO t1 VALUES (1,11),(2,12),(3,13);
+#
+# Start test
+# All the following queries shall return 1 record
+#
+
+# Masking all correct values {11...13} for column i in this result. 
+SELECT MAX(pk) as max, i
+FROM t1
+ORDER BY max;
+max	i
+3	#
+
+EXPLAIN
+SELECT MAX(pk) as max, i
+FROM t1
+ORDER BY max;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using temporary
+
+# Only 11 is correct for collumn i in this result
+SELECT MAX(pk) as max, i
+FROM t1
+WHERE pk<2
+ORDER BY max;
+max	i
+1	11
+#
+# Cleanup
+#
+DROP TABLE t1;
+End of 5.1 tests

mysql-test/suite/binlog/r/binlog_row_binlog.result

@@ -1309,3 +1309,27 @@ INSERT INTO test.t1 VALUES (1), (2);
 CREATE TABLE test.t2 SELECT * FROM test.t1;
 USE test;
 DROP TABLES t1, t2;
+RESET MASTER;
+CREATE TABLE t1 (a INT PRIMARY KEY);
+BINLOG '
+3u9kSA8KAAAAZgAAAGoAAAABAAQANS4xLjM1LW1hcmlhLWJldGExLWRlYnVnLWxvZwAAAAAAAAAA
+AAAAAAAAAAAAAAAAAADe72RIEzgNAAgAEgAEBAQEEgAAUwAEGggAAAAICAgC
+';
+INSERT INTO t1 VALUES (1);
+BINLOG '
+3u9kSBMUAAAAKQAAAJEBAAAAABoAAAAAAAAABHRlc3QAAnQxAAEDAAA=
+3u9kSBcUAAAAIgAAALMBAAAQABoAAAAAAAEAAf/+AgAAAA==
+';
+SHOW BINLOG EVENTS;
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+#	#	Format_desc	1	#	Server ver: #, Binlog ver: #
+#	#	Query	1	#	use `test`; CREATE TABLE t1 (a INT PRIMARY KEY)
+#	#	Query	1	#	BEGIN
+#	#	Table_map	1	#	table_id: # (test.t1)
+#	#	Write_rows	1	#	table_id: # flags: STMT_END_F
+#	#	Query	1	#	COMMIT
+#	#	Query	1	#	BEGIN
+#	#	Table_map	1	#	table_id: # (test.t1)
+#	#	Write_rows	1	#	table_id: # flags: STMT_END_F
+#	#	Query	1	#	COMMIT
+DROP TABLE t1;

mysql-test/suite/binlog/r/binlog_row_mysqlbinlog_verbose.result

 Verbose statements from : write-partial-row.binlog
-select txt from raw_binlog_rows where txt like '###%';
-txt
+select replace(txt,'\r', '') as stmt from raw_binlog_rows where txt like '###%';
+stmt
 ### INSERT INTO mysql.ndb_apply_status
 ### SET
 ###   @1=1
@@ -37,8 +37,8 @@ txt
 ###   @1=2
 drop table raw_binlog_rows;
 Verbose statements from : write-full-row.binlog
-select txt from raw_binlog_rows where txt like '###%';
-txt
+select replace(txt,'\r', '') as stmt from raw_binlog_rows where txt like '###%';
+stmt
 ### INSERT INTO mysql.ndb_apply_status
 ### SET
 ###   @1=2
@@ -76,8 +76,8 @@ txt
 ###   @1=2
 drop table raw_binlog_rows;
 Verbose statements from : update-partial-row.binlog
-select txt from raw_binlog_rows where txt like '###%';
-txt
+select replace(txt,'\r', '') as stmt from raw_binlog_rows where txt like '###%';
+stmt
 ### INSERT INTO mysql.ndb_apply_status
 ### SET
 ###   @1=3
@@ -117,8 +117,8 @@ txt
 ###   @1=2
 drop table raw_binlog_rows;
 Verbose statements from : update-full-row.binlog
-select txt from raw_binlog_rows where txt like '###%';
-txt
+select replace(txt,'\r', '') as stmt from raw_binlog_rows where txt like '###%';
+stmt
 ### INSERT INTO mysql.ndb_apply_status
 ### SET
 ###   @1=4

mysql-test/suite/binlog/r/binlog_stm_binlog.result

@@ -784,3 +784,24 @@ INSERT INTO test.t1 VALUES (1), (2);
 CREATE TABLE test.t2 SELECT * FROM test.t1;
 USE test;
 DROP TABLES t1, t2;
+RESET MASTER;
+CREATE TABLE t1 (a INT PRIMARY KEY);
+BINLOG '
+3u9kSA8KAAAAZgAAAGoAAAABAAQANS4xLjM1LW1hcmlhLWJldGExLWRlYnVnLWxvZwAAAAAAAAAA
+AAAAAAAAAAAAAAAAAADe72RIEzgNAAgAEgAEBAQEEgAAUwAEGggAAAAICAgC
+';
+INSERT INTO t1 VALUES (1);
+BINLOG '
+3u9kSBMUAAAAKQAAAJEBAAAAABoAAAAAAAAABHRlc3QAAnQxAAEDAAA=
+3u9kSBcUAAAAIgAAALMBAAAQABoAAAAAAAEAAf/+AgAAAA==
+';
+SHOW BINLOG EVENTS;
+Log_name	Pos	Event_type	Server_id	End_log_pos	Info
+#	#	Format_desc	1	#	Server ver: #, Binlog ver: #
+#	#	Query	1	#	use `test`; CREATE TABLE t1 (a INT PRIMARY KEY)
+#	#	Query	1	#	use `test`; INSERT INTO t1 VALUES (1)
+#	#	Query	1	#	BEGIN
+#	#	Table_map	1	#	table_id: # (test.t1)
+#	#	Write_rows	1	#	table_id: # flags: STMT_END_F
+#	#	Query	1	#	COMMIT
+DROP TABLE t1;

mysql-test/suite/binlog/t/binlog_row_mysqlbinlog_verbose.test

@@ -45,7 +45,8 @@ create table raw_binlog_rows (txt varchar(1000));
 --remove_file $MYSQLTEST_VARDIR/tmp/mysqlbinlog_verbose.sql
 --enable_query_log
 --echo Verbose statements from : $binlog_file
-select txt from raw_binlog_rows where txt like '###%';
+# Output --verbose lines, with extra Windows CR's trimmed
+select replace(txt,'\r', '') as stmt from raw_binlog_rows where txt like '###%';
 drop table raw_binlog_rows;
 
 --disable_query_log
@@ -56,7 +57,8 @@ create table raw_binlog_rows (txt varchar(1000));
 --remove_file $MYSQLTEST_VARDIR/tmp/mysqlbinlog_verbose.sql
 --enable_query_log
 --echo Verbose statements from : $binlog_file
-select txt from raw_binlog_rows where txt like '###%';
+# Output --verbose lines, with extra Windows CR's trimmed
+select replace(txt,'\r', '') as stmt from raw_binlog_rows where txt like '###%';
 drop table raw_binlog_rows;
 
 --disable_query_log
@@ -67,7 +69,8 @@ create table raw_binlog_rows (txt varchar(1000));
 --remove_file $MYSQLTEST_VARDIR/tmp/mysqlbinlog_verbose.sql
 --enable_query_log
 --echo Verbose statements from : $binlog_file
-select txt from raw_binlog_rows where txt like '###%';
+# Output --verbose lines, with extra Windows CR's trimmed
+select replace(txt,'\r', '') as stmt from raw_binlog_rows where txt like '###%';
 drop table raw_binlog_rows;
 
 --disable_query_log
@@ -78,5 +81,6 @@ create table raw_binlog_rows (txt varchar(1000));
 --remove_file $MYSQLTEST_VARDIR/tmp/mysqlbinlog_verbose.sql
 --enable_query_log
 --echo Verbose statements from : $binlog_file
-select txt from raw_binlog_rows where txt like '###%';
+# Output --verbose lines, with extra Windows CR's trimmed
+select replace(txt,'\r', '') as stmt from raw_binlog_rows where txt like '###%';
 drop table raw_binlog_rows;

mysql-test/t/func_group.test

@@ -1006,3 +1006,51 @@ DROP TABLE t1;
 
 ###
 --echo End of 5.0 tests
+
+--echo #
+--echo # BUG#47280 - strange results from count(*) with order by multiple 
+--echo #             columns without where/group
+--echo # 
+
+--echo # 
+--echo # Initialize test
+--echo # 
+
+CREATE TABLE t1 (
+  pk INT NOT NULL,
+  i INT,
+  PRIMARY KEY (pk)
+);
+INSERT INTO t1 VALUES (1,11),(2,12),(3,13);
+
+--echo #
+--echo # Start test
+--echo # All the following queries shall return 1 record
+--echo #
+
+--echo
+--echo # Masking all correct values {11...13} for column i in this result. 
+--replace_column 2 #
+SELECT MAX(pk) as max, i
+FROM t1
+ORDER BY max;
+
+--echo
+EXPLAIN
+SELECT MAX(pk) as max, i
+FROM t1
+ORDER BY max;
+
+--echo
+--echo # Only 11 is correct for collumn i in this result
+SELECT MAX(pk) as max, i
+FROM t1
+WHERE pk<2
+ORDER BY max;
+
+--echo #
+--echo # Cleanup
+--echo #
+DROP TABLE t1;
+
+--echo End of 5.1 tests

sql/log_event.cc

@@ -3859,6 +3859,7 @@ bool Format_description_log_event::write(IO_CACHE* file)
 #if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
 int Format_description_log_event::do_apply_event(Relay_log_info const *rli)
 {
+  int ret= 0;
   DBUG_ENTER("Format_description_log_event::do_apply_event");
 
 #ifdef USING_TRANSACTIONS
@@ -3900,17 +3901,21 @@ int Format_description_log_event::do_apply_event(Relay_log_info const *rli)
       0, then 96, then jump to first really asked event (which is
       >96). So this is ok.
     */
-    DBUG_RETURN(Start_log_event_v3::do_apply_event(rli));
+    ret= Start_log_event_v3::do_apply_event(rli);
   }
-  DBUG_RETURN(0);
+
+  if (!ret)
+  {
+    /* Save the information describing this binlog */
+    delete rli->relay_log.description_event_for_exec;
+    const_cast<Relay_log_info *>(rli)->relay_log.description_event_for_exec= this;
+  }
+
+  DBUG_RETURN(ret);
 }
 
 int Format_description_log_event::do_update_pos(Relay_log_info *rli)
 {
-  /* save the information describing this binlog */
-  delete rli->relay_log.description_event_for_exec;
-  rli->relay_log.description_event_for_exec= this;
-
   if (server_id == (uint32) ::server_id)
   {
     /*
@@ -7506,6 +7511,7 @@ int Rows_log_event::do_apply_event(Relay_log_info const *rli)
     thd->reset_current_stmt_binlog_row_based();
     const_cast<Relay_log_info*>(rli)->cleanup_context(thd, error);
     thd->is_slave_error= 1;
+    DBUG_RETURN(error);
   }
   /*
     This code would ideally be placed in do_update_pos() instead, but
@@ -7534,6 +7540,14 @@ int Rows_log_event::do_apply_event(Relay_log_info const *rli)
     const_cast<Relay_log_info*>(rli)->last_event_start_time= my_time(0);
   }
 
+  if (get_flags(STMT_END_F))
+    if (error= rows_event_stmt_cleanup(rli, thd))
+      rli->report(ERROR_LEVEL, error,
+                  "Error in %s event: commit of row events failed, "
+                  "table `%s`.`%s`",
+                  get_type_str(), m_table->s->db.str,
+                  m_table->s->table_name.str);
+
   DBUG_RETURN(error);
 }
 
@@ -7632,33 +7646,19 @@ Rows_log_event::do_update_pos(Relay_log_info *rli)
 
   if (get_flags(STMT_END_F))
   {
-    if ((error= rows_event_stmt_cleanup(rli, thd)) == 0)
-    {
-      /*
-        Indicate that a statement is finished.
-        Step the group log position if we are not in a transaction,
-        otherwise increase the event log position.
-      */
-      rli->stmt_done(log_pos, when);
-
-      /*
-        Clear any errors pushed in thd->net.last_err* if for example "no key
-        found" (as this is allowed). This is a safety measure; apparently
-        those errors (e.g. when executing a Delete_rows_log_event of a
-        non-existing row, like in rpl_row_mystery22.test,
-        thd->net.last_error = "Can't find record in 't1'" and last_errno=1032)
-        do not become visible. We still prefer to wipe them out.
-      */
-      thd->clear_error();
-    }
-    else
-    {
-      rli->report(ERROR_LEVEL, error,
-                  "Error in %s event: commit of row events failed, "
-                  "table `%s`.`%s`",
-                  get_type_str(), m_table->s->db.str,
-                  m_table->s->table_name.str);
-    }
+    /*
+      Indicate that a statement is finished.
+      Step the group log position if we are not in a transaction,
+      otherwise increase the event log position.
+    */
+    rli->stmt_done(log_pos, when);
+    /*
+      Clear any errors in thd->net.last_err*. It is not known if this is
+      needed or not. It is believed that any errors that may exist in
+      thd->net.last_err* are allowed. Examples of errors are "key not
+      found", which is produced in the test case rpl_row_conflicts.test
+    */
+    thd->clear_error();
   }
   else
   {

sql/log_event_old.cc

@@ -1814,33 +1814,6 @@ int Old_rows_log_event::do_apply_event(Relay_log_info const *rli)
     const_cast<Relay_log_info*>(rli)->last_event_start_time= my_time(0);
   }
 
-  DBUG_RETURN(0);
-}
-
-
-Log_event::enum_skip_reason
-Old_rows_log_event::do_shall_skip(Relay_log_info *rli)
-{
-  /*
-    If the slave skip counter is 1 and this event does not end a
-    statement, then we should not start executing on the next event.
-    Otherwise, we defer the decision to the normal skipping logic.
-  */
-  if (rli->slave_skip_counter == 1 && !get_flags(STMT_END_F))
-    return Log_event::EVENT_SKIP_IGNORE;
-  else
-    return Log_event::do_shall_skip(rli);
-}
-
-int
-Old_rows_log_event::do_update_pos(Relay_log_info *rli)
-{
-  DBUG_ENTER("Old_rows_log_event::do_update_pos");
-  int error= 0;
-
-  DBUG_PRINT("info", ("flags: %s",
-                      get_flags(STMT_END_F) ? "STMT_END_F " : ""));
-
   if (get_flags(STMT_END_F))
   {
     /*
@@ -1869,7 +1842,12 @@ Old_rows_log_event::do_update_pos(Relay_log_info *rli)
       are involved, commit the transaction and flush the pending event to the
       binlog.
     */
-    error= ha_autocommit_or_rollback(thd, 0);
+    if (error= ha_autocommit_or_rollback(thd, 0))
+      rli->report(ERROR_LEVEL, error,
+                  "Error in %s event: commit of row events failed, "
+                  "table `%s`.`%s`",
+                  get_type_str(), m_table->s->db.str,
+                  m_table->s->table_name.str);
 
     /*
       Now what if this is not a transactional engine? we still need to
@@ -1882,33 +1860,51 @@ Old_rows_log_event::do_update_pos(Relay_log_info *rli)
     */
 
     thd->reset_current_stmt_binlog_row_based();
-    rli->cleanup_context(thd, 0);
-    if (error == 0)
-    {
-      /*
-        Indicate that a statement is finished.
-        Step the group log position if we are not in a transaction,
-        otherwise increase the event log position.
-       */
-      rli->stmt_done(log_pos, when);
+    const_cast<Relay_log_info*>(rli)->cleanup_context(thd, 0);
+  }
 
-      /*
-        Clear any errors pushed in thd->net.client_last_err* if for
-        example "no key found" (as this is allowed). This is a safety
-        measure; apparently those errors (e.g. when executing a
-        Delete_rows_log_event_old of a non-existing row, like in
-        rpl_row_mystery22.test, thd->net.last_error = "Can't
-        find record in 't1'" and last_errno=1032) do not become
-        visible. We still prefer to wipe them out.
-      */
-      thd->clear_error();
-    }
-    else
-      rli->report(ERROR_LEVEL, error,
-                  "Error in %s event: commit of row events failed, "
-                  "table `%s`.`%s`",
-                  get_type_str(), m_table->s->db.str,
-                  m_table->s->table_name.str);
+  DBUG_RETURN(error);
+}
+
+
+Log_event::enum_skip_reason
+Old_rows_log_event::do_shall_skip(Relay_log_info *rli)
+{
+  /*
+    If the slave skip counter is 1 and this event does not end a
+    statement, then we should not start executing on the next event.
+    Otherwise, we defer the decision to the normal skipping logic.
+  */
+  if (rli->slave_skip_counter == 1 && !get_flags(STMT_END_F))
+    return Log_event::EVENT_SKIP_IGNORE;
+  else
+    return Log_event::do_shall_skip(rli);
+}
+
+int
+Old_rows_log_event::do_update_pos(Relay_log_info *rli)
+{
+  DBUG_ENTER("Old_rows_log_event::do_update_pos");
+  int error= 0;
+
+  DBUG_PRINT("info", ("flags: %s",
+                      get_flags(STMT_END_F) ? "STMT_END_F " : ""));
+
+  if (get_flags(STMT_END_F))
+  {
+    /*
+      Indicate that a statement is finished.
+      Step the group log position if we are not in a transaction,
+      otherwise increase the event log position.
+     */
+    rli->stmt_done(log_pos, when);
+    /*
+      Clear any errors in thd->net.last_err*. It is not known if this is
+      needed or not. It is believed that any errors that may exist in
+      thd->net.last_err* are allowed. Examples of errors are "key not
+      found", which is produced in the test case rpl_row_conflicts.test
+    */
+    thd->clear_error();
   }
   else
   {

sql/opt_sum.cc

@@ -97,7 +97,8 @@ static ulonglong get_exact_record_count(TABLE_LIST *tables)
 
   @note
     This function is only called for queries with sum functions and no
-    GROUP BY part.
+    GROUP BY part. This means that the result set shall contain a single
+    row only
 
   @retval
     0                    no errors

sql/slave.cc

@@ -2082,8 +2082,7 @@ static int has_temporary_error(THD *thd)
   @retval 2 No error calling ev->apply_event(), but error calling
   ev->update_pos().
 */
-int apply_event_and_update_pos(Log_event* ev, THD* thd, Relay_log_info* rli,
-                               bool skip)
+int apply_event_and_update_pos(Log_event* ev, THD* thd, Relay_log_info* rli)
 {
   int exec_res= 0;
 
@@ -2128,37 +2127,33 @@ int apply_event_and_update_pos(Log_event* ev, THD* thd, Relay_log_info* rli,
     ev->when= my_time(0);
   ev->thd = thd; // because up to this point, ev->thd == 0
 
-  if (skip)
-  {
-    int reason= ev->shall_skip(rli);
-    if (reason == Log_event::EVENT_SKIP_COUNT)
-      --rli->slave_skip_counter;
-    pthread_mutex_unlock(&rli->data_lock);
-    if (reason == Log_event::EVENT_SKIP_NOT)
-      exec_res= ev->apply_event(rli);
+  int reason= ev->shall_skip(rli);
+  if (reason == Log_event::EVENT_SKIP_COUNT)
+    --rli->slave_skip_counter;
+  pthread_mutex_unlock(&rli->data_lock);
+  if (reason == Log_event::EVENT_SKIP_NOT)
+    exec_res= ev->apply_event(rli);
+
 #ifndef DBUG_OFF
-    /*
-      This only prints information to the debug trace.
+  /*
+    This only prints information to the debug trace.
 
-      TODO: Print an informational message to the error log?
-    */
-    static const char *const explain[] = {
-      // EVENT_SKIP_NOT,
-      "not skipped",
-      // EVENT_SKIP_IGNORE,
-      "skipped because event should be ignored",
-      // EVENT_SKIP_COUNT
-      "skipped because event skip counter was non-zero"
-    };
-    DBUG_PRINT("info", ("OPTION_BEGIN: %d; IN_STMT: %d",
-                        thd->options & OPTION_BEGIN ? 1 : 0,
-                        rli->get_flag(Relay_log_info::IN_STMT)));
-    DBUG_PRINT("skip_event", ("%s event was %s",
-                              ev->get_type_str(), explain[reason]));
+    TODO: Print an informational message to the error log?
+  */
+  static const char *const explain[] = {
+    // EVENT_SKIP_NOT,
+    "not skipped",
+    // EVENT_SKIP_IGNORE,
+    "skipped because event should be ignored",
+    // EVENT_SKIP_COUNT
+    "skipped because event skip counter was non-zero"
+  };
+  DBUG_PRINT("info", ("OPTION_BEGIN: %d; IN_STMT: %d",
+                      thd->options & OPTION_BEGIN ? 1 : 0,
+                      rli->get_flag(Relay_log_info::IN_STMT)));
+  DBUG_PRINT("skip_event", ("%s event was %s",
+                            ev->get_type_str(), explain[reason]));
 #endif
-  }
-  else
-    exec_res= ev->apply_event(rli);
 
   DBUG_PRINT("info", ("apply_event error = %d", exec_res));
   if (exec_res == 0)
@@ -2278,7 +2273,7 @@ static int exec_relay_log_event(THD* thd, Relay_log_info* rli)
       delete ev;
       DBUG_RETURN(1);
     }
-    exec_res= apply_event_and_update_pos(ev, thd, rli, TRUE);
+    exec_res= apply_event_and_update_pos(ev, thd, rli);
 
     /*
       Format_description_log_event should not be deleted because it will be

sql/slave.h

@@ -190,8 +190,7 @@ int purge_relay_logs(Relay_log_info* rli, THD *thd, bool just_reset,
 void set_slave_thread_options(THD* thd);
 void set_slave_thread_default_charset(THD *thd, Relay_log_info const *rli);
 void rotate_relay_log(Master_info* mi);
-int apply_event_and_update_pos(Log_event* ev, THD* thd, Relay_log_info* rli,
-                               bool skip);
+int apply_event_and_update_pos(Log_event* ev, THD* thd, Relay_log_info* rli);
 
 pthread_handler_t handle_slave_io(void *arg);
 pthread_handler_t handle_slave_sql(void *arg);

sql/sql_binlog.cc

@@ -56,17 +56,20 @@ void mysql_client_binlog_statement(THD* thd)
     Format_description_event.
   */
   my_bool have_fd_event= TRUE;
-  if (!thd->rli_fake)
+  int err;
+  Relay_log_info *rli;
+  rli= thd->rli_fake;
+  if (!rli)
   {
-    thd->rli_fake= new Relay_log_info;
+    rli= thd->rli_fake= new Relay_log_info;
 #ifdef HAVE_purify
-    thd->rli_fake->is_fake= TRUE;
+    rli->is_fake= TRUE;
 #endif
     have_fd_event= FALSE;
   }
-  if (thd->rli_fake && !thd->rli_fake->relay_log.description_event_for_exec)
+  if (rli && !rli->relay_log.description_event_for_exec)
   {
-    thd->rli_fake->relay_log.description_event_for_exec=
+    rli->relay_log.description_event_for_exec=
       new Format_description_log_event(4);
     have_fd_event= FALSE;
   }
@@ -78,16 +81,16 @@ void mysql_client_binlog_statement(THD* thd)
   /*
     Out of memory check
   */
-  if (!(thd->rli_fake &&
-        thd->rli_fake->relay_log.description_event_for_exec &&
+  if (!(rli &&
+        rli->relay_log.description_event_for_exec &&
         buf))
   {
     my_error(ER_OUTOFMEMORY, MYF(0), 1);  /* needed 1 bytes */
     goto end;
   }
 
-  thd->rli_fake->sql_thd= thd;
-  thd->rli_fake->no_storage= TRUE;
+  rli->sql_thd= thd;
+  rli->no_storage= TRUE;
 
   for (char const *strptr= thd->lex->comment.str ;
        strptr < thd->lex->comment.str + thd->lex->comment.length ; )
@@ -170,8 +173,7 @@ void mysql_client_binlog_statement(THD* thd)
       }
 
       ev= Log_event::read_log_event(bufptr, event_len, &error,
-                                    thd->rli_fake->relay_log.
-                                      description_event_for_exec);
+                                    rli->relay_log.description_event_for_exec);
 
       DBUG_PRINT("info",("binlog base64 err=%s", error));
       if (!ev)
@@ -209,18 +211,10 @@ void mysql_client_binlog_statement(THD* thd)
         reporting.
       */
 #if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
-      if (apply_event_and_update_pos(ev, thd, thd->rli_fake, FALSE))
-      {
-        delete ev;
-        /*
-          TODO: Maybe a better error message since the BINLOG statement
-          now contains several events.
-        */
-        my_error(ER_UNKNOWN_ERROR, MYF(0), "Error executing BINLOG statement");
-        goto end;
-      }
+      err= ev->apply_event(rli);
+#else
+      err= 0;
 #endif
-
       /*
         Format_description_log_event should not be deleted because it
         will be used to read info about the relay log's format; it
@@ -228,8 +222,17 @@ void mysql_client_binlog_statement(THD* thd)
         i.e. when this thread terminates.
       */
       if (ev->get_type_code() != FORMAT_DESCRIPTION_EVENT)
-        delete ev;
+        delete ev; 
       ev= 0;
+      if (err)
+      {
+        /*
+          TODO: Maybe a better error message since the BINLOG statement
+          now contains several events.
+        */
+        my_error(ER_UNKNOWN_ERROR, MYF(0), "Error executing BINLOG statement");
+        goto end;
+      }
     }
   }
 
@@ -238,7 +241,7 @@ void mysql_client_binlog_statement(THD* thd)
   my_ok(thd);
 
 end:
-  thd->rli_fake->clear_tables_to_lock();
+  rli->clear_tables_to_lock();
   my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
   DBUG_VOID_RETURN;
 }

sql/sql_class.h

@@ -2647,7 +2647,32 @@ class TMP_TABLE_PARAM :public Sql_alloc
   MI_COLUMNDEF *recinfo,*start_recinfo;
   KEY *keyinfo;
   ha_rows end_write_records;
-  uint	field_count,sum_func_count,func_count;
+  /**
+    Number of normal fields in the query, including those referred to
+    from aggregate functions. Hence, "SELECT `field1`,
+    SUM(`field2`) from t1" sets this counter to 2.
+
+    @see count_field_types
+  */
+  uint	field_count; 
+  /**
+    Number of fields in the query that have functions. Includes both
+    aggregate functions (e.g., SUM) and non-aggregates (e.g., RAND).
+    Also counts functions referred to from aggregate functions, i.e.,
+    "SELECT SUM(RAND())" sets this counter to 2.
+
+    @see count_field_types
+  */
+  uint  func_count;  
+  /**
+    Number of fields in the query that have aggregate functions. Note
+    that the optimizer may choose to optimize away these fields by
+    replacing them with constants, in which case sum_func_count will
+    need to be updated.
+
+    @see opt_sum_query, count_field_types
+  */
+  uint  sum_func_count;   
   uint  hidden_field_count;
   uint	group_parts,group_length,group_null_parts;
   uint	quick_group;

sql/sql_select.cc

@@ -644,8 +644,11 @@ JOIN::prepare(Item ***rref_pointer_array,
   this->group= group_list != 0;
   unit= unit_arg;
 
+  if (tmp_table_param.sum_func_count && !group_list)
+    implicit_grouping= TRUE;
+
 #ifdef RESTRICTED_GROUP
-  if (sum_func_count && !group_list && (func_count || field_count))
+  if (implicit_grouping)
   {
     my_message(ER_WRONG_SUM_SELECT,ER(ER_WRONG_SUM_SELECT),MYF(0));
     goto err;
@@ -881,15 +884,23 @@ JOIN::optimize()
   }
 #endif
 
-  /* Optimize count(*), min() and max() */
-  if (tables_list && tmp_table_param.sum_func_count && ! group_list)
+  /* 
+     Try to optimize count(*), min() and max() to const fields if
+     there is implicit grouping (aggregate functions but no
+     group_list). In this case, the result set shall only contain one
+     row. 
+  */
+  if (tables_list && implicit_grouping)
   {
     int res;
     /*
       opt_sum_query() returns HA_ERR_KEY_NOT_FOUND if no rows match
       to the WHERE conditions,
-      or 1 if all items were resolved,
+      or 1 if all items were resolved (optimized away),
       or 0, or an error number HA_ERR_...
+
+      If all items were resolved by opt_sum_query, there is no need to
+      open any tables.
     */
     if ((res=opt_sum_query(select_lex->leaf_tables, all_fields, conds)))
     {
@@ -2024,7 +2035,7 @@ JOIN::exec()
     count_field_types(select_lex, &curr_join->tmp_table_param, 
                       *curr_all_fields, 0);
   
-  if (curr_join->group || curr_join->tmp_table_param.sum_func_count ||
+  if (curr_join->group || curr_join->implicit_grouping ||
       (procedure && (procedure->flags & PROC_GROUP)))
   {
     if (make_group_fields(this, curr_join))
@@ -10811,6 +10822,12 @@ Next_select_func setup_end_select_func(JOIN *join)
   }
   else
   {
+    /* 
+       Choose method for presenting result to user. Use end_send_group
+       if the query requires grouping (has a GROUP BY clause and/or one or
+       more aggregate functions). Use end_send if the query should not
+       be grouped.
+     */
     if ((join->sort_and_group ||
          (join->procedure && join->procedure->flags & PROC_GROUP)) &&
         !tmp_tbl->precomputed_group_by)

sql/sql_select.h

@@ -278,7 +278,14 @@ class JOIN :public Sql_alloc
   TABLE    **table,**all_tables,*sort_by_table;
   uint	   tables,const_tables;
   uint	   send_group_parts;
-  bool	   sort_and_group,first_record,full_join,group, no_field_update;
+  /**
+    Indicates that grouping will be performed on the result set during
+    query execution. This field belongs to query execution.
+
+    @see make_group_fields, alloc_group_fields, JOIN::exec
+  */
+  bool     sort_and_group; 
+  bool     first_record,full_join,group, no_field_update;
   bool	   do_send_rows;
   /**
     TRUE when we want to resume nested loop iterations when
@@ -428,6 +435,7 @@ class JOIN :public Sql_alloc
     tables= 0;
     const_tables= 0;
     join_list= 0;
+    implicit_grouping= FALSE;
     sort_and_group= 0;
     first_record= 0;
     do_send_rows= 1;
@@ -533,6 +541,11 @@ class JOIN :public Sql_alloc
                                         select_lex == unit->fake_select_lex));
   }
 private:
+  /**
+    TRUE if the query contains an aggregate function but has no GROUP
+    BY clause. 
+  */
+  bool implicit_grouping; 
   bool make_simple_join(JOIN *join, TABLE *tmp_table);
 };