Added Non-prelocked SP execution: Now a PROCEDURE doesn't enter/leave prelocked mode for

its body, but lets each statement to get/release its own locks. This allows a broader set
of statements to be executed inside PROCEDUREs (but breaks replication)
This patch should fix BUG#8072, BUG#8766, BUG#9563, BUG#11126


mysql-test/r/sp-security.result:
  Drop tables this test attempts to create
mysql-test/r/sp-threads.result:
  Update test results
mysql-test/r/sp.result:
  Disabled a test that triggers BUG#11986, cleanup used tables when tests start.
mysql-test/r/view.result:
  Enabled a test case that now works with prelocking-free SPs
mysql-test/t/sp-security.test:
  Drop tables this test attempts to create
mysql-test/t/sp.test:
  Disabled a test that triggers BUG#11986, cleanup used tables when tests start.
mysql-test/t/view.test:
  Enabled a test case that now works with prelocking-free SPs
sql/handler.cc:
  Rename: thd->transaction.in_sub_stmt -> thd->in_sub_stmt
sql/item_func.cc:
  Rename: thd->transaction.in_sub_stmt -> thd->in_sub_stmt
sql/sp.cc:
  Non-prelocked SP execution: Added support for skipping prelocking of procedure body for
  "CALL proc(...)" statements.
sql/sp.h:
  Non-prelocked SP execution: Added support for skipping prelocking of procedure body for
  "CALL proc(...)" statements.
sql/sp_cache.h:
  Added comments
sql/sp_head.cc:
  Non-prelocked SP execution:
  * Try to unlock tables after PROCEDURE arguments have been evaluated.
  * Make sp_lex_keeper be able to execute in 2 modes: A) when already in prelocked mode
    B) when its statement enters/leaves prelocked mode itself.
sql/sp_head.h:
  Non-prelocked SP execution:  Make sp_lex_keeper to additionally keep list of tables it 
  needs to prelock when its statement enters/leaves prelocked mode on its own.
sql/sql_base.cc:
  Non-prelocked SP execution: Make open_tables() to
   * detect 'CALL proc(...)' and not to do prelocking for procedure body statements.
   * Make lex->query_tables_last to point precisely to a boundary in lex->query_tables 
     list where 'own' tables and views' tables end and added-for-prelocking tables begin.
     (it was not true before - view's tables could end up after query_tables_own_last)
sql/sql_class.cc:
  Rename: thd->transaction.in_sub_stmt -> thd->in_sub_stmt
sql/sql_class.h:
  Rename: thd->transaction.in_sub_stmt -> thd->in_sub_stmt
sql/sql_lex.cc:
  Non-prelocked SP execution: More rigourous cleanup in st_lex::cleanup_after_one_table_open()
sql/sql_parse.cc:
  Rename: thd->transaction.in_sub_stmt -> thd->in_sub_stmt, remove outdated comments
sql/sql_trigger.h:
  Rename: thd->transaction.in_sub_stmt -> thd->in_sub_stmt

1 files changed, 25 insertions, 1 deletions

diff --git a/sql/sp_head.h b/sql/sp_head.h
index 32dc4449174..724cbcc7fc5 100644
--- a/sql/sp_head.h
+++ b/sql/sp_head.h
@@ -282,6 +282,10 @@ private:
   /*
     Multi-set representing optimized list of tables to be locked by this
     routine. Does not include tables which are used by invoked routines.
+
+    Note: for prelocking-free SPs this multiset is constructed too.
+    We do so because the same instance of sp_head may be called both
+    in prelocked mode and in non-prelocked mode.
   */
   HASH m_sptabs;
 
@@ -383,7 +387,8 @@ class sp_lex_keeper
 public:
 
   sp_lex_keeper(LEX *lex, bool lex_resp)
-    : m_lex(lex), m_lex_resp(lex_resp)
+    : m_lex(lex), m_lex_resp(lex_resp), 
+      lex_query_tables_own_last(NULL)
   {
     lex->sp_lex_in_use= TRUE;
   }
@@ -418,6 +423,25 @@ private:
     for LEX deletion.
   */
   bool m_lex_resp;
+
+  /*
+    Support for being able to execute this statement in two modes:
+    a) inside prelocked mode set by the calling procedure or its ancestor.
+    b) outside of prelocked mode, when this statement enters/leaves
+       prelocked mode itself.
+  */
+  
+  /*
+    List of additional tables this statement needs to lock when it
+    enters/leaves prelocked mode on its own.
+  */
+  TABLE_LIST *prelocking_tables;
+
+  /*
+    The value m_lex->query_tables_own_last should be set to this when the
+    statement enters/leaves prelocked mode on its own.
+  */
+  TABLE_LIST **lex_query_tables_own_last;
 };