Commit 53944e1c authored by unknown's avatar unknown
Browse files

Fix for bug#7915: crash,JOIN VIEW, subquery, SELECT .. FROM INFORMATION_SCHEMA.COLUMNS

parent b1f5ed9d

mysql-test/r/information_schema.result

+6 −0
Original line number Diff line number Diff line
@@ -604,3 +604,9 @@ Variable_name Value 
show global status like "Threads_running";

Variable_name	Value

Threads_running	1

create table t1(f1 int);

create table t2(f2 int);

create view v1 as select * from t1, t2;

set @got_val= (select count(*) from information_schema.columns);

drop view v1;

drop table t1, t2;

mysql-test/t/information_schema.test

+11 −0
Original line number Diff line number Diff line
@@ -352,3 +352,14 @@ show variables where variable_name like "skip_show_databas"; 
# Bug #7981:SHOW GLOBAL STATUS crashes server

#

show global status like "Threads_running";



#

# Bug #7915  crash,JOIN VIEW, subquery, 

# SELECT .. FROM INFORMATION_SCHEMA.COLUMNS

#

create table t1(f1 int);

create table t2(f2 int);

create view v1 as select * from t1, t2;

set @got_val= (select count(*) from information_schema.columns);

drop view v1;

drop table t1, t2;

sql/sql_lex.cc

+6 −0
Original line number Diff line number Diff line
@@ -1733,6 +1733,12 @@ bool st_lex::can_not_use_merged() 
  {

  case SQLCOM_CREATE_VIEW:

  case SQLCOM_SHOW_CREATE:

  /*

    SQLCOM_SHOW_FIELDS is necessary to make 

    information schema tables working correctly with views.

    see get_schema_tables_result function

  */

  case SQLCOM_SHOW_FIELDS:

    return TRUE;

  default:

    return FALSE;