Fix for BUG#14769 "Function fails to replicate if fails half-way (slave stops)":

if the function, invoked in a non-binlogged caller (e.g. SELECT, DO), failed half-way on the master,
slave would stop and complain that error code between him and master mismatch. 
To solve this, when a stored function is invoked in a non-binlogged caller (e.g. SELECT, DO), we binlog the function
call as SELECT instead of as DO (see revision comment of sp_head.cc for more).
And: minor wording change in the help text.
This cset will cause conflicts in 5.1, I'll merge.


mysql-test/r/rpl_sp.result:
  result update
mysql-test/t/rpl_sp-slave.opt:
  bug just fixed so option not needed
mysql-test/t/rpl_sp.test:
  test for more half-failed functions with DO and SELECT, to test the bug of this changeset.
  cleanup at the end.
sql/mysqld.cc:
  function -> stored function (change suggested by Paul)
sql/sp_head.cc:
  When a function updates data and is called from a non-binlogged statement (SELECT, DO), we binlog it 
  as SELECT myfunc(), and not DO myfunc() like before.

mysql-test/r/rpl_sp.result

@@ -233,20 +233,25 @@ end	@	#	#
 delete from t2;
 alter table t2 add unique (a);
 drop function fn1;
-create function fn1()
+create function fn1(x int)
 returns int
 begin
-insert into t2 values(20),(20);
+insert into t2 values(x),(x);
 return 10;
 end|
-select fn1();
+do fn1(100);
+Warnings:
+Error	1062	Duplicate entry '100' for key 1
+select fn1(20);
 ERROR 23000: Duplicate entry '20' for key 1
 select * from t2;
 a
 20
+100
 select * from t2;
 a
 20
+100
 create trigger trg before insert on t1 for each row set new.a= 10;
 ERROR 42000: Access denied; you need the SUPER privilege for this operation
 delete from t1;
@@ -324,7 +329,7 @@ insert into t1 values (x);
 return x+2;
 end
 master-bin.000001	#	Query	1	#	use `mysqltest1`; delete t1,t2 from t1,t2
-master-bin.000001	#	Query	1	#	use `mysqltest1`; DO `fn1`(20)
+master-bin.000001	#	Query	1	#	use `mysqltest1`; SELECT `fn1`(20)
 master-bin.000001	#	Query	1	#	use `mysqltest1`; insert into t2 values(fn1(21))
 master-bin.000001	#	Query	1	#	use `mysqltest1`; drop function fn1
 master-bin.000001	#	Query	1	#	use `mysqltest1`; create function fn1()
@@ -351,13 +356,14 @@ end
 master-bin.000001	#	Query	1	#	use `mysqltest1`; delete from t2
 master-bin.000001	#	Query	1	#	use `mysqltest1`; alter table t2 add unique (a)
 master-bin.000001	#	Query	1	#	use `mysqltest1`; drop function fn1
-master-bin.000001	#	Query	1	#	use `mysqltest1`; create function fn1()
+master-bin.000001	#	Query	1	#	use `mysqltest1`; create function fn1(x int)
 returns int
 begin
-insert into t2 values(20),(20);
+insert into t2 values(x),(x);
 return 10;
 end
-master-bin.000001	#	Query	1	#	use `mysqltest1`; DO `fn1`()
+master-bin.000001	#	Query	1	#	use `mysqltest1`; SELECT `fn1`(100)
+master-bin.000001	#	Query	1	#	use `mysqltest1`; SELECT `fn1`(20)
 master-bin.000001	#	Query	1	#	use `mysqltest1`; delete from t1
 master-bin.000001	#	Query	1	#	use `mysqltest1`; CREATE DEFINER=`root`@`localhost` trigger trg before insert on t1 for each row set new.a= 10
 master-bin.000001	#	Query	1	#	use `mysqltest1`; insert into t1 values (1)
@@ -415,4 +421,3 @@ col
 test
 DROP PROCEDURE p1;
 drop table t1;
-reset master;

mysql-test/t/rpl_sp-slave.opt

---log_bin_trust_routine_creators=0 --slave-skip-errors=1062
+--log_bin_trust_routine_creators=0

mysql-test/t/rpl_sp.test

@@ -294,21 +294,19 @@ alter table t2 add unique (a);
 drop function fn1;
 
 delimiter |;
-create function fn1()
+create function fn1(x int)
        returns int
 begin
-  insert into t2 values(20),(20);
+  insert into t2 values(x),(x);
   return 10;
 end|
 
 delimiter ;|
 
-# Because of BUG#14769 the following statement requires that we start
-# slave with --slave-skip-errors=1062. When that bug is fixed, that
-# option can be removed.
+do fn1(100);
 
 --error 1062
-select fn1();
+select fn1(20);
 
 select * from t2;
 sync_slave_with_master;
@@ -440,4 +438,4 @@ DROP PROCEDURE p1;
 # cleanup
 connection master;
 drop table t1;
-reset master;
+sync_slave_with_master;

sql/mysqld.cc

@@ -4923,8 +4923,8 @@ Disable with --skip-innodb-doublewrite.", (gptr*) &innobase_use_doublewrite,
   */
   {"log-bin-trust-function-creators", OPT_LOG_BIN_TRUST_FUNCTION_CREATORS,
    "If equal to 0 (the default), then when --log-bin is used, creation of "
-   "a function is allowed only to users having the SUPER privilege and only "
-   "if this function may not break binary logging.",
+   "a stored function is allowed only to users having the SUPER privilege and"
+   " only if this function may not break binary logging.",
    (gptr*) &trust_function_creators, (gptr*) &trust_function_creators, 0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
   {"log-error", OPT_ERROR_LOG_FILE, "Error log file.",

sql/sp_head.cc

@@ -736,13 +736,7 @@ int cmp_splocal_locations(Item_splocal * const *a, Item_splocal * const *b)
   Statements that have is_update_query(stmt) == FALSE (e.g. SELECTs) are not
   written into binary log. Instead we catch function calls the statement
   makes and write it into binary log separately (see #3).
-  
-  We actually can easily write SELECT statements into the binary log in the 
-  right order (we don't have issues with const tables being unlocked early
-  because SELECTs that use FUNCTIONs unlock all tables at once) We don't do 
-  it because replication slave thread currently can't execute SELECT
-  statements. Fixing this is on the TODO.
-  
+
   2. PROCEDURE calls
 
   CALL statements are not written into binary log. Instead
@@ -763,7 +757,7 @@ int cmp_splocal_locations(Item_splocal * const *a, Item_splocal * const *b)
      function execution (grep for start_union_events and stop_union_events)
 
    If the answers are No and Yes, we write the function call into the binary
-   log as "DO spfunc(<param1value>, <param2value>, ...)"
+   log as "SELECT spfunc(<param1value>, <param2value>, ...)".
   
   
   4. Miscellaneous issues.
@@ -1310,7 +1304,7 @@ sp_head::execute_function(THD *thd, Item **argp, uint argcount,
     char buf[256];
     String bufstr(buf, sizeof(buf), &my_charset_bin);
     bufstr.length(0);
-    bufstr.append(STRING_WITH_LEN("DO "));
+    bufstr.append(STRING_WITH_LEN("SELECT "));
     append_identifier(thd, &bufstr, m_name.str, m_name.length);
     bufstr.append('(');
     for (uint i=0; i < argcount; i++)