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authorbell@sanja.is.com.ua <>2005-06-14 22:45:48 +0300
committerbell@sanja.is.com.ua <>2005-06-14 22:45:48 +0300
commita78cc269472327e95c2c7ed0d233880a5207e373 (patch)
tree245f09eed7f3ce616ac752aa5162da8e79937ba0
parentf183b1be31213982199b37d2c0cfdb1732e32568 (diff)
downloadmariadb-git-a78cc269472327e95c2c7ed0d233880a5207e373.tar.gz
prohibit opening Query cache for SP cursors (BUG#9715)
-rw-r--r--mysql-test/r/query_cache.result29
-rw-r--r--mysql-test/t/query_cache.test32
-rw-r--r--sql/sp_head.h4
-rw-r--r--sql/sp_rcontext.cc11
-rw-r--r--sql/sp_rcontext.h6
5 files changed, 77 insertions, 5 deletions
diff --git a/mysql-test/r/query_cache.result b/mysql-test/r/query_cache.result
index 385ac1f4dfb..506a76579ae 100644
--- a/mysql-test/r/query_cache.result
+++ b/mysql-test/r/query_cache.result
@@ -1007,4 +1007,33 @@ abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzab
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flush query cache;
drop table t1, t2;
+create table t1 (a int);
+insert into t1 values (1),(2);
+CREATE PROCEDURE `p1`()
+begin
+Declare c1 cursor for select a from t1;
+open c1;
+select * from t1;
+end//
+call p1()//
+a
+1
+2
+drop procedure p1;
+create function f1() returns int
+begin
+Declare var1 int;
+select max(a) from t1 into var1;
+return var1;
+end//
+create procedure `p1`()
+begin
+select a, f1() from t1;
+end//
+call p1()//
+a f1()
+1 2
+2 2
+drop procedure p1//
+drop table t1//
set GLOBAL query_cache_size=0;
diff --git a/mysql-test/t/query_cache.test b/mysql-test/t/query_cache.test
index d4e3b95e4a2..88891bd3881 100644
--- a/mysql-test/t/query_cache.test
+++ b/mysql-test/t/query_cache.test
@@ -756,4 +756,36 @@ flush query cache;
drop table t1, t2;
+#
+# SP cursors and selects with query cache (BUG#9715)
+#
+create table t1 (a int);
+insert into t1 values (1),(2);
+
+delimiter //;
+CREATE PROCEDURE `p1`()
+begin
+Declare c1 cursor for select a from t1;
+open c1;
+select * from t1;
+end//
+call p1()//
+drop procedure p1;
+
+create function f1() returns int
+begin
+Declare var1 int;
+select max(a) from t1 into var1;
+return var1;
+end//
+create procedure `p1`()
+begin
+ select a, f1() from t1;
+end//
+call p1()//
+drop procedure p1//
+
+drop table t1//
+delimiter ;//
+
set GLOBAL query_cache_size=0;
diff --git a/sql/sp_head.h b/sql/sp_head.h
index 49eabce246b..617d6622037 100644
--- a/sql/sp_head.h
+++ b/sql/sp_head.h
@@ -377,6 +377,10 @@ public:
return (uint)m_lex->sql_command;
}
+ void disable_query_cache()
+ {
+ m_lex->safe_to_cache_query= 0;
+ }
private:
LEX *m_lex;
diff --git a/sql/sp_rcontext.cc b/sql/sp_rcontext.cc
index 61cd7a9300f..aacb9254753 100644
--- a/sql/sp_rcontext.cc
+++ b/sql/sp_rcontext.cc
@@ -169,6 +169,17 @@ sp_rcontext::pop_cursors(uint count)
*
*/
+sp_cursor::sp_cursor(sp_lex_keeper *lex_keeper)
+ :m_lex_keeper(lex_keeper), m_prot(NULL), m_isopen(0), m_current_row(NULL)
+{
+ /*
+ currsor can't be stored in QC, so we should prevent opening QC for
+ try to write results which are absent.
+ */
+ lex_keeper->disable_query_cache();
+}
+
+
/*
pre_open cursor
diff --git a/sql/sp_rcontext.h b/sql/sp_rcontext.h
index 864dc3df146..b188805435f 100644
--- a/sql/sp_rcontext.h
+++ b/sql/sp_rcontext.h
@@ -203,11 +203,7 @@ class sp_cursor : public Sql_alloc
{
public:
- sp_cursor(sp_lex_keeper *lex_keeper)
- : m_lex_keeper(lex_keeper), m_prot(NULL), m_isopen(0), m_current_row(NULL)
- {
- /* Empty */
- }
+ sp_cursor(sp_lex_keeper *lex_keeper);
virtual ~sp_cursor()
{