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BUG#11758263 50440: MARK UNORDERED UPDATE WITH AUTOINC UNSAFE

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Problem: Statements that write to tables with auto_increment columns
      based on the selection from another table, may lead to master
      and slave going out of sync, as the order in which the rows
      are retrived from the table may differ on master and slave.
      
      Solution: We mark writing to a table with auto_increment table
      as unsafe. This will cause the execution of such statements to
      throw a warning and forces the statement to be logged in ROW if
      the logging format is mixed. 
      
      Changes: 
      1. All the statements that writes to a table with auto_increment 
      column(s) based on the rows fetched from another table, will now
      be unsafe.
      2. CREATE TABLE with SELECT will now be unsafe.
This commit is contained in:
Rohit Kalhans
2012-02-08 00:33:08 +05:30
parent c8d8a92300
commit 6df5a61d2e
27 changed files with 153 additions and 26 deletions
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15
sql/sql_lex.h
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@ -1268,6 +1268,13 @@ public:
*/
BINLOG_STMT_UNSAFE_INSERT_SELECT_UPDATE,
/**
Query that writes to a table with auto_inc column after selecting from
other tables are unsafe as the order in which the rows are retrieved by
select may differ on master and slave.
*/
BINLOG_STMT_UNSAFE_WRITE_AUTOINC_SELECT,
/**
INSERT...REPLACE SELECT is unsafe because which rows are replaced depends
on the order that rows are retrieved by SELECT. This order cannot be
@ -1289,6 +1296,14 @@ public:
*/
BINLOG_STMT_UNSAFE_CREATE_REPLACE_SELECT,
/**
CREATE TABLE...SELECT on a table with auto-increment column is unsafe
because which rows are replaced depends on the order that rows are
retrieved from SELECT. This order cannot be predicted and may differ on
master and the slave
*/
BINLOG_STMT_UNSAFE_CREATE_SELECT_AUTOINC,
/**
UPDATE...IGNORE is unsafe because which rows are ignored depends on the
order that rows are updated. This order cannot be predicted and may differ