Commit e1c2646a authored by unknown's avatar unknown
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prohibit opening Query cache for SP cursors (BUG#9715) 


mysql-test/r/query_cache.result:
  testing cursors in SP with QC
  testing suspicious but working using selects in function with QC
mysql-test/t/query_cache.test:
  testing cursors in SP with QC
  testing suspicious but working using selects in function with QC
sql/sp_head.h:
  method for prohibiting of QC using SP query
sql/sp_rcontext.cc:
  prohibit opening Query cache for SP cursors
sql/sp_rcontext.h:
  constructor moved to .cc file to be able to use methods from lex_keeper
parent d5600efd

mysql-test/r/query_cache.result

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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;

mysql-test/t/query_cache.test

+32 −0
Original line number Diff line number Diff line
@@ -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;

sql/sp_head.h

+4 −0
Original line number Diff line number Diff line
@@ -377,6 +377,10 @@ class sp_lex_keeper 
    return (uint)m_lex->sql_command;

  }



  void disable_query_cache()

  {

    m_lex->safe_to_cache_query= 0;

  }

private:



  LEX *m_lex;

sql/sp_rcontext.cc

+11 −0
Original line number Diff line number Diff line
@@ -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

sql/sp_rcontext.h

+1 −5
Original line number Diff line number Diff line
@@ -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()

  {