Many files:

  Merge InnoDB-4.0.5: new isolation levels READ COMMITTED and READ UNCOMMITTED now supported, selective deadlock resolution
mysqld.cc:
  Change MySQL default isolation level to REPEATABLE READ; note that InnoDB has always had that default, and BDB and MyISAM always run at SERIALIZABLE level anyway

1 files changed, 22 insertions, 0 deletions

diff --git a/innobase/read/read0read.c b/innobase/read/read0read.c
index a5048c0c909..5c1d2d5418e 100644
--- a/innobase/read/read0read.c
+++ b/innobase/read/read0read.c
@@ -201,6 +201,28 @@ read_view_close(
 } 
 
 /*************************************************************************
+Closes a consistent read view for MySQL. This function is called at an SQL
+statement end if the trx isolation level is <= TRX_ISO_READ_COMMITTED. */
+
+void
+read_view_close_for_mysql(
+/*======================*/
+	trx_t*	trx)	/* in: trx which has a read view */
+{
+	ut_a(trx->read_view);
+
+	mutex_enter(&kernel_mutex);
+
+	read_view_close(trx->read_view);
+
+	mem_heap_empty(trx->read_view_heap);
+
+	trx->read_view = NULL;
+
+	mutex_exit(&kernel_mutex);
+}
+	
+/*************************************************************************
 Prints a read view to stderr. */
 
 void