Added DBUG_ASSERT_AS_PRINTF compile flag

If compiling a non DBUG binary with
-DDBUG_ASSERT_AS_PRINTF asserts will be
changed to printf + stack trace (of stack
trace are enabled).

- Changed #ifndef DBUG_OFF to
  #ifdef DBUG_ASSERT_EXISTS
  for those DBUG_OFF that was just used to enable
  assert
- Assert checking that could greatly impact
  performance where changed to DBUG_ASSERT_SLOW which
  is not affected by DBUG_ASSERT_AS_PRINTF
- Added one extra option to my_print_stacktrace() to
  get more silent in case of stack trace printing as
  part of assert.

1 files changed, 1 insertions, 1 deletions

diff --git a/sql/sp_rcontext.h b/sql/sp_rcontext.h
index 98464518787..6ff6e02f737 100644
--- a/sql/sp_rcontext.h
+++ b/sql/sp_rcontext.h
@@ -176,7 +176,7 @@ public:
   /// of the client/server protocol.
   bool end_partial_result_set;
 
-#ifndef DBUG_OFF
+#ifdef DBUG_ASSERT_EXISTS
   /// The stored program for which this runtime context is created. Used for
   /// checking if correct runtime context is used for variable handling.
   sp_head *sp;