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Fix for

Browse source 
bug #26842: master binary log contains invalid queries - replication fails
bug #12826: Possible to get inconsistent slave using SQL syntax Prepared Statements

Problem:  
binlogging PS' we may produce syntacticly incorrect queries in the binlog replacing 
some parameters with variable names (instead of variable values).
E.g. in the reported case of "limit ?" clause: replacing "?" with "@var"
produces "limit @var" which is not a correct SQL syntax. 
Also it may lead to different query execution on slave if we
set and use a variable in the same statement, e.g.
"insert into t1 values (@x:=@x+1, ?)"

Fix: make the stored statement string created upon its execution use variable values
(instead of names) to fill placeholders.


mysql-test/r/ctype_cp932_binlog.result:
  Fix for
  bug #26842: master binary log contains invalid queries - replication fails
  bug #12826: Possible to get inconsistent slave using SQL syntax Prepared Statements
    - result adjusted.
mysql-test/r/ctype_cp932_notembedded.result:
  Fix for
  bug #26842: master binary log contains invalid queries - replication fails
  bug #12826: Possible to get inconsistent slave using SQL syntax Prepared Statements
    - result adjusted.
mysql-test/r/rpl_user_variables.result:
  Fix for
  bug #26842: master binary log contains invalid queries - replication fails
  bug #12826: Possible to get inconsistent slave using SQL syntax Prepared Statements
    - test result.
mysql-test/t/ctype_cp932_binlog.test:
  Fix for
  bug #26842: master binary log contains invalid queries - replication fails
  bug #12826: Possible to get inconsistent slave using SQL syntax Prepared Statements
    - test adjusted.
mysql-test/t/rpl_user_variables.test:
  Fix for
  bug #26842: master binary log contains invalid queries - replication fails
  bug #12826: Possible to get inconsistent slave using SQL syntax Prepared Statements
    - test case.
sql/sql_prepare.cc:
  Fix for
  bug #26842: master binary log contains invalid queries - replication fails
  bug #12826: Possible to get inconsistent slave using SQL syntax Prepared Statements
    - set val to the variable's value (escaped if needed) then insert it into the query
      string in the position of the placeholder. We don't need to call
      get_var_with_binlog() here as there is no trace of the variable's name in the binlog.
This commit is contained in:
unknown 2007-05-24 15:35:43 +05:00
parent d076bcbcc4
commit 3791e35f79
6 changed files with 98 additions and 46 deletions
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15
mysql-test/r/ctype_cp932_binlog.result
View file

@ -9,8 +9,7 @@ EXECUTE stmt1 USING @var1;
SHOW BINLOG EVENTS FROM 98;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 98 Query 1 188 use `test`; CREATE TABLE t1(f1 blob)
master-bin.000001 188 User var 1 227 @`var1`=_binary 0x8300 COLLATE binary
master-bin.000001 227 Query 1 323 use `test`; INSERT INTO t1 VALUES(@'var1')
master-bin.000001 188 Query 1 283 use `test`; INSERT INTO t1 VALUES(0x8300)
SELECT HEX(f1) FROM t1;
HEX(f1)
8300
@ -30,17 +29,17 @@ HEX(s1) HEX(s2) d
466F6F2773206120426172 ED40ED41ED42 47.93
DROP PROCEDURE bug18293|
DROP TABLE t4|
SHOW BINLOG EVENTS FROM 402|
SHOW BINLOG EVENTS FROM 362|
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 402 Query 1 568 use `test`; CREATE TABLE t4 (s1 CHAR(50) CHARACTER SET latin1,
master-bin.000001 362 Query 1 528 use `test`; CREATE TABLE t4 (s1 CHAR(50) CHARACTER SET latin1,
s2 CHAR(50) CHARACTER SET cp932,
d DECIMAL(10,2))
master-bin.000001 568 Query 1 816 use `test`; CREATE DEFINER=`root`@`localhost` PROCEDURE bug18293 (IN ins1 CHAR(50),
master-bin.000001 528 Query 1 776 use `test`; CREATE DEFINER=`root`@`localhost` PROCEDURE bug18293 (IN ins1 CHAR(50),
IN ins2 CHAR(50) CHARACTER SET cp932,
IN ind DECIMAL(10,2))
BEGIN
INSERT INTO t4 VALUES (ins1, ins2, ind);
END
master-bin.000001 816 Query 1 1035 use `test`; INSERT INTO t4 VALUES ( NAME_CONST('ins1',_latin1 0x466F6F2773206120426172), NAME_CONST('ins2',_cp932 0xED40ED41ED42), NAME_CONST('ind',47.93))
master-bin.000001 1035 Query 1 1124 use `test`; DROP PROCEDURE bug18293
master-bin.000001 1124 Query 1 1203 use `test`; DROP TABLE t4
master-bin.000001 776 Query 1 995 use `test`; INSERT INTO t4 VALUES ( NAME_CONST('ins1',_latin1 0x466F6F2773206120426172), NAME_CONST('ins2',_cp932 0xED40ED41ED42), NAME_CONST('ind',47.93))
master-bin.000001 995 Query 1 1084 use `test`; DROP PROCEDURE bug18293
master-bin.000001 1084 Query 1 1163 use `test`; DROP TABLE t4

3
mysql-test/r/ctype_cp932_notembedded.result
View file

@ -9,8 +9,7 @@ EXECUTE stmt1 USING @var1;
SHOW BINLOG EVENTS FROM 98;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 98 Query 1 188 use `test`; CREATE TABLE t1(f1 blob)
master-bin.000001 188 User var 1 227 @`var1`=_binary 0x8300 COLLATE binary
master-bin.000001 227 Query 1 323 use `test`; INSERT INTO t1 VALUES(@'var1')
master-bin.000001 188 Query 1 283 use `test`; INSERT INTO t1 VALUES(0x8300)
SELECT HEX(f1) FROM t1;
HEX(f1)
8300

40
mysql-test/r/rpl_user_variables.result
View file

@ -253,10 +253,44 @@ SELECT * from t2;
k
100
42
drop table t1, t2;
reset master;
create table t1 (a int);
prepare s from "insert into t1 values (@a),(?)";
set @a=98;
execute s using @a;
prepare s from "insert into t1 values (?)";
set @a=99;
execute s using @a;
prepare s from "insert into t1 select 100 limit ?";
set @a=100;
execute s using @a;
show binlog events from 98;
Log_name Pos Event_type Server_id End_log_pos Info
slave-bin.000001 98 Query 1 184 use `test`; create table t1 (a int)
slave-bin.000001 184 User var 2 226 @`a`=98
slave-bin.000001 226 Query 1 320 use `test`; insert into t1 values (@a),(98)
slave-bin.000001 320 Query 1 409 use `test`; insert into t1 values (99)
slave-bin.000001 409 Query 1 507 use `test`; insert into t1 select 100 limit 100
select * from t1;
a
98
98
99
100
drop table t1;
create table t1(a int, b int);
prepare s1 from 'insert into t1 values (@x:=@x+1, ?)';
set @x=1;
execute s1 using @x;
select * from t1;
a b
2 1
select * from t1;
a b
2 1
drop table t1;
End of 5.0 tests.
DROP TABLE t1;
DROP TABLE t2;
DROP TABLE IF EXISTS t1;
DROP FUNCTION IF EXISTS f1;
DROP FUNCTION IF EXISTS f2;
CREATE TABLE t1 (i INT);

2
mysql-test/t/ctype_cp932_binlog.test
View file

@ -51,7 +51,7 @@ CALL bug18293("Foo's a Bar", _cp932 0xED40ED41ED42, 47.93)|
SELECT HEX(s1),HEX(s2),d FROM t4|
DROP PROCEDURE bug18293|
DROP TABLE t4|
SHOW BINLOG EVENTS FROM 402|
SHOW BINLOG EVENTS FROM 362|
delimiter ;|
# End of 5.0 tests

47
mysql-test/t/rpl_user_variables.test
View file

@ -296,21 +296,55 @@ SELECT * from t1;
SELECT * from t2;
connection master;
drop table t1, t2;
#
# Bug #26842: master binary log contains invalid queries - replication fails
#
save_master_pos;
connection slave;
sync_with_master;
reset master;
connection master;
create table t1 (a int);
prepare s from "insert into t1 values (@a),(?)";
set @a=98; execute s using @a;
prepare s from "insert into t1 values (?)";
set @a=99; execute s using @a;
prepare s from "insert into t1 select 100 limit ?";
set @a=100; execute s using @a;
save_master_pos;
connection slave;
sync_with_master;
show binlog events from 98;
select * from t1;
connection master;
drop table t1;
#
# Bug #12826: Possible to get inconsistent slave using SQL syntax Prepared Statements
#
connection master;
create table t1(a int, b int);
prepare s1 from 'insert into t1 values (@x:=@x+1, ?)';
set @x=1; execute s1 using @x;
select * from t1;
sync_slave_with_master;
connection slave;
select * from t1;
connection master;
drop table t1;
--echo End of 5.0 tests.
# Cleanup
DROP TABLE t1;
DROP TABLE t2;
# This test uses a stored function that uses user-defined variables to return data
# The test ensures the value of the user-defined variable is replicated correctly
# and in the correct order of assignment.
# This test was constructed for BUG#20141
--disable_warnings
DROP TABLE IF EXISTS t1;
DROP FUNCTION IF EXISTS f1;
DROP FUNCTION IF EXISTS f2;
--enable_warnings
@ -358,4 +392,3 @@ DROP TABLE t1;
sync_slave_with_master;
stop slave;

37
sql/sql_prepare.cc
View file

@ -969,6 +969,7 @@ static bool insert_params_from_vars_with_log(Prepared_statement *stmt,
String buf;
const String *val;
uint32 length= 0;
THD *thd= stmt->thd;
DBUG_ENTER("insert_params_from_vars");
@ -979,34 +980,20 @@ static bool insert_params_from_vars_with_log(Prepared_statement *stmt,
{
Item_param *param= *it;
varname= var_it++;
if (get_var_with_binlog(stmt->thd, stmt->lex->sql_command,
*varname, &entry))
DBUG_RETURN(1);
if (param->set_from_user_var(stmt->thd, entry))
entry= (user_var_entry *) hash_search(&thd->user_vars, (byte*) varname->str,
varname->length);
/*
We have to call the setup_one_conversion_function() here to set
the parameter's members that might be needed further
(e.g. value.cs_info.character_set_client is used in the query_val_str()).
*/
setup_one_conversion_function(thd, param, param->param_type);
if (param->set_from_user_var(thd, entry))
DBUG_RETURN(1);
/* Insert @'escaped-varname' instead of parameter in the query */
if (entry)
{
char *start, *ptr;
buf.length(0);
if (buf.reserve(entry->name.length*2+3))
DBUG_RETURN(1);
val= param->query_val_str(&buf);
start= ptr= buf.c_ptr_quick();
*ptr++= '@';
*ptr++= '\'';
ptr+= escape_string_for_mysql(&my_charset_utf8_general_ci,
ptr, 0, entry->name.str,
entry->name.length);
*ptr++= '\'';
buf.length(ptr - start);
val= &buf;
}
else
val= &my_null_string;
if (param->convert_str_value(stmt->thd))
if (param->convert_str_value(thd))
DBUG_RETURN(1); /* out of memory */
if (query->replace(param->pos_in_query+length, 1, *val))