merge mysql-5.1-bugteam (local) --> mysql-5.1-bugteam

1 files changed, 82 insertions, 26 deletions

diff --git a/sql/log.cc b/sql/log.cc
index 7d820b48c43..b3554d2a068 100644
--- a/sql/log.cc
+++ b/sql/log.cc
@@ -1510,27 +1510,23 @@ static int binlog_commit(handlerton *hton, THD *thd, bool all)
   }
 
   /*
-    We commit the transaction if:
+    We flush the cache if:
 
-     - We are not in a transaction and committing a statement, or
+     - we are committing a transaction or;
+     - no statement was committed before and just non-transactional
+       tables were updated.
 
-     - We are in a transaction and a full transaction is committed
-
-    Otherwise, we accumulate the statement
+    Otherwise, we collect the changes.
   */
-  ulonglong const in_transaction=
-    thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN);
   DBUG_PRINT("debug",
-             ("all: %d, empty: %s, in_transaction: %s, all.modified_non_trans_table: %s, stmt.modified_non_trans_table: %s",
+             ("all: %d, empty: %s, all.modified_non_trans_table: %s, stmt.modified_non_trans_table: %s",
               all,
               YESNO(trx_data->empty()),
-              YESNO(in_transaction),
               YESNO(thd->transaction.all.modified_non_trans_table),
               YESNO(thd->transaction.stmt.modified_non_trans_table)));
-  if (!in_transaction || all ||
-      (!all && !trx_data->at_least_one_stmt_committed &&
-      !stmt_has_updated_trans_table(thd) &&
-      thd->transaction.stmt.modified_non_trans_table))
+  if (ending_trans(thd, all) ||
+      (trans_has_no_stmt_committed(thd, all) &&
+       !stmt_has_updated_trans_table(thd) && stmt_has_updated_non_trans_table(thd)))
   {
     Query_log_event qev(thd, STRING_WITH_LEN("COMMIT"), TRUE, TRUE, 0);
     error= binlog_end_trans(thd, trx_data, &qev, all);
@@ -1593,7 +1589,7 @@ static int binlog_rollback(handlerton *hton, THD *thd, bool all)
       On the other hand, if a statement is transactional, we just safely roll it
       back.
     */
-    if ((thd->transaction.stmt.modified_non_trans_table ||
+    if ((stmt_has_updated_non_trans_table(thd) ||
         (thd->options & OPTION_KEEP_LOG)) &&
         mysql_bin_log.check_write_error(thd))
       trx_data->set_incident();
@@ -1603,19 +1599,18 @@ static int binlog_rollback(handlerton *hton, THD *thd, bool all)
   {
    /*
       We flush the cache with a rollback, wrapped in a beging/rollback if:
-        . aborting a transaction that modified a non-transactional table;
+        . aborting a transaction that modified a non-transactional table or
+          the OPTION_KEEP_LOG is activate.
         . aborting a statement that modified both transactional and
           non-transactional tables but which is not in the boundaries of any
           transaction or there was no early change;
-        . the OPTION_KEEP_LOG is activate.
     */
-    if ((all && thd->transaction.all.modified_non_trans_table) ||
-        (!all && thd->transaction.stmt.modified_non_trans_table &&
-         !(thd->options & (OPTION_BEGIN | OPTION_NOT_AUTOCOMMIT))) ||
-        (!all && thd->transaction.stmt.modified_non_trans_table &&
-         !trx_data->at_least_one_stmt_committed &&
-         thd->current_stmt_binlog_row_based) ||
-        ((thd->options & OPTION_KEEP_LOG)))
+    if ((ending_trans(thd, all) &&
+        (trans_has_updated_non_trans_table(thd) ||
+         (thd->options & OPTION_KEEP_LOG))) ||
+        (trans_has_no_stmt_committed(thd, all) &&
+         stmt_has_updated_non_trans_table(thd) &&
+         thd->current_stmt_binlog_row_based))
     {
       Query_log_event qev(thd, STRING_WITH_LEN("ROLLBACK"), TRUE, TRUE, 0);
       error= binlog_end_trans(thd, trx_data, &qev, all);
@@ -1624,8 +1619,8 @@ static int binlog_rollback(handlerton *hton, THD *thd, bool all)
       Otherwise, we simply truncate the cache as there is no change on
       non-transactional tables as follows.
     */
-    else if ((all && !thd->transaction.all.modified_non_trans_table) ||
-          (!all && !thd->transaction.stmt.modified_non_trans_table))
+    else if (ending_trans(thd, all) ||
+             (!(thd->options & OPTION_KEEP_LOG) && !stmt_has_updated_non_trans_table(thd)))
       error= binlog_end_trans(thd, trx_data, 0, all);
   }
   if (!all)
@@ -1721,7 +1716,7 @@ static int binlog_savepoint_rollback(handlerton *hton, THD *thd, void *sv)
     non-transactional table. Otherwise, truncate the binlog cache starting
     from the SAVEPOINT command.
   */
-  if (unlikely(thd->transaction.all.modified_non_trans_table || 
+  if (unlikely(trans_has_updated_non_trans_table(thd) || 
                (thd->options & OPTION_KEEP_LOG)))
   {
     String log_query;
@@ -3934,6 +3929,67 @@ bool MYSQL_BIN_LOG::is_query_in_union(THD *thd, query_id_t query_id_param)
           query_id_param >= thd->binlog_evt_union.first_query_id);
 }
 
+/**
+  This function checks if a transaction, either a multi-statement
+  or a single statement transaction is about to commit or not.
+
+  @param thd The client thread that executed the current statement.
+  @param all Committing a transaction (i.e. TRUE) or a statement
+             (i.e. FALSE).
+  @return
+    @c true if committing a transaction, otherwise @c false.
+*/
+bool ending_trans(const THD* thd, const bool all)
+{
+  return (all || (!all && !(thd->options & 
+                  (OPTION_BEGIN | OPTION_NOT_AUTOCOMMIT))));
+}
+
+/**
+  This function checks if a non-transactional table was updated by
+  the current transaction.
+
+  @param thd The client thread that executed the current statement.
+  @return
+    @c true if a non-transactional table was updated, @c false
+    otherwise.
+*/
+bool trans_has_updated_non_trans_table(const THD* thd)
+{
+  return (thd->transaction.all.modified_non_trans_table ||
+          thd->transaction.stmt.modified_non_trans_table);
+}
+
+/**
+  This function checks if any statement was committed and cached.
+
+  @param thd The client thread that executed the current statement.
+  @param all Committing a transaction (i.e. TRUE) or a statement
+             (i.e. FALSE).
+  @return
+    @c true if at a statement was committed and cached, @c false
+    otherwise.
+*/
+bool trans_has_no_stmt_committed(const THD* thd, bool all)
+{
+  binlog_trx_data *const trx_data=
+    (binlog_trx_data*) thd_get_ha_data(thd, binlog_hton);
+
+  return (!all && !trx_data->at_least_one_stmt_committed);
+}
+
+/**
+  This function checks if a non-transactional table was updated by the
+  current statement.
+
+  @param thd The client thread that executed the current statement.
+  @return
+    @c true if a non-transactional table was updated, @c false otherwise.
+*/
+bool stmt_has_updated_non_trans_table(const THD* thd)
+{
+  return (thd->transaction.stmt.modified_non_trans_table);
+}
 
 /*
   These functions are placed in this file since they need access to