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BUG#50312 Warnings for unsafe sub-statement not returned to client

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After BUG#36649, warnings for sub-statements are cleared when a 
new sub-statement is started. This is problematic since it suppresses
warnings for unsafe statements in some cases. It is important that we
always give a warning to the client, because the user needs to know
when there is a risk that the slave goes out of sync.
                        
We fixed the problem by generating warning messages for unsafe statements
while returning from a stored procedure, function, trigger or while
executing a top level statement.
                        
We also started checking unsafeness when both performance and log tables are
used. This is necessary after the performance schema which does a distinction
between performance and log tables.
This commit is contained in:
Alfranio Correia
2010-08-10 12:32:54 +01:00
parent 89ad5fa810
commit bd3aa7eb78
17 changed files with 782 additions and 1259 deletions
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125
sql/sql_lex.h
View File

@@ -1276,6 +1276,125 @@ public:
DBUG_VOID_RETURN;
}
enum enum_stmt_accessed_table
{
/*
If a transactional table is about to be read. Note that
a write implies a read.
*/
STMT_READS_TRANS_TABLE= 0,
/*
If a transactional table is about to be updated.
*/
STMT_WRITES_TRANS_TABLE,
/*
If a non-transactional table is about to be read. Note that
a write implies a read.
*/
STMT_READS_NON_TRANS_TABLE,
/*
If a non-transactional table is about to be updated.
*/
STMT_WRITES_NON_TRANS_TABLE,
/*
If a temporary transactional table is about to be read. Note
that a write implies a read.
*/
STMT_READS_TEMP_TRANS_TABLE,
/*
If a temporary transactional table is about to be updated.
*/
STMT_WRITES_TEMP_TRANS_TABLE,
/*
If a temporary non-transactional table is about to be read. Note
that a write implies a read.
*/
STMT_READS_TEMP_NON_TRANS_TABLE,
/*
If a temporary non-transactional table is about to be updated.
*/
STMT_WRITES_TEMP_NON_TRANS_TABLE,
/*
The last element of the enumeration. Please, if necessary add
anything before this.
*/
STMT_ACCESS_TABLE_COUNT
};
/**
Sets the type of table that is about to be accessed while executing a
statement.
@param accessed_table Enumeration type that defines the type of table,
e.g. temporary, transactional, non-transactional.
*/
inline void set_stmt_accessed_table(enum_stmt_accessed_table accessed_table)
{
DBUG_ENTER("THD::set_stmt_accessed_table");
DBUG_ASSERT(accessed_table >= 0 && accessed_table < STMT_ACCESS_TABLE_COUNT);
stmt_accessed_table_flag |= (1U << accessed_table);
DBUG_VOID_RETURN;
}
/**
Checks if a type of table is about to be accessed while executing a
statement.
@param accessed_table Enumeration type that defines the type of table,
e.g. temporary, transactional, non-transactional.
@return
@retval TRUE if the type of the table is about to be accessed
@retval FALSE otherwise
*/
inline bool stmt_accessed_table(enum_stmt_accessed_table accessed_table)
{
DBUG_ENTER("THD::stmt_accessed_table");
DBUG_ASSERT(accessed_table >= 0 && accessed_table < STMT_ACCESS_TABLE_COUNT);
DBUG_RETURN((stmt_accessed_table_flag & (1U << accessed_table)) != 0);
}
/**
Checks if a temporary table is about to be accessed while executing a
statement.
@return
@retval TRUE if a temporary table is about to be accessed
@retval FALSE otherwise
*/
inline bool stmt_accessed_temp_table()
{
DBUG_ENTER("THD::stmt_accessed_temp_table");
DBUG_RETURN((stmt_accessed_table_flag &
((1U << STMT_READS_TEMP_TRANS_TABLE) |
(1U << STMT_WRITES_TEMP_TRANS_TABLE) |
(1U << STMT_READS_TEMP_NON_TRANS_TABLE) |
(1U << STMT_WRITES_TEMP_NON_TRANS_TABLE))) != 0);
}
/**
Checks if a temporary non-transactional table is about to be accessed
while executing a statement.
@return
@retval TRUE if a temporary non-transactional table is about to be
accessed
@retval FALSE otherwise
*/
inline bool stmt_accessed_non_trans_temp_table()
{
DBUG_ENTER("THD::stmt_accessed_non_trans_temp_table");
DBUG_RETURN((stmt_accessed_table_flag &
((1U << STMT_READS_TEMP_NON_TRANS_TABLE) |
(1U << STMT_WRITES_TEMP_NON_TRANS_TABLE))) != 0);
}
/**
true if the parsed tree contains references to stored procedures
or functions, false otherwise
@@ -1317,6 +1436,12 @@ private:
stored procedure has its own LEX object (but no own THD object).
*/
uint32 binlog_stmt_flags;
/**
Bit field that determines the type of tables that are about to be
be accessed while executing a statement.
*/
uint32 stmt_accessed_table_flag;
};