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Bug#44151 using handler commands on information_schema tables crashes server

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information schema tables are based on internal tmp tables which are removed
after each statement execution. So HANDLER comands can not be used with
information schema.
This commit is contained in:
Sergey Glukhov
2009-04-17 12:41:15 +05:00
parent 2c1add4b45
commit 4fbfa8db45
3 changed files with 20 additions and 0 deletions
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4
mysql-test/r/handler.result
View File

@ -502,3 +502,7 @@ handler t1_alias READ a next where inexistent > 0;
ERROR 42S22: Unknown column 'inexistent' in 'field list' ERROR 42S22: Unknown column 'inexistent' in 'field list'
handler t1_alias close; handler t1_alias close;
drop table t1; drop table t1;
USE information_schema;
HANDLER COLUMNS OPEN;
ERROR HY000: Incorrect usage of HANDLER OPEN and information_schema
USE test;

8
mysql-test/t/handler.test
View File

@ -460,3 +460,11 @@ handler t1_alias read a next;
handler t1_alias READ a next where inexistent > 0; handler t1_alias READ a next where inexistent > 0;
handler t1_alias close; handler t1_alias close;
drop table t1; drop table t1;
#
# Bug#44151 using handler commands on information_schema tables crashes server
#
USE information_schema;
--error ER_WRONG_USAGE
HANDLER COLUMNS OPEN;
USE test;

8
sql/sql_handler.cc
View File

@ -190,6 +190,14 @@ bool mysql_ha_open(THD *thd, TABLE_LIST *tables, bool reopen)
tables->db, tables->table_name, tables->alias, tables->db, tables->table_name, tables->alias,
(int) reopen)); (int) reopen));
if (tables->schema_table)
{
my_error(ER_WRONG_USAGE, MYF(0), "HANDLER OPEN",
INFORMATION_SCHEMA_NAME.str);
DBUG_PRINT("exit",("ERROR"));
DBUG_RETURN(TRUE);
}
if (! hash_inited(&thd->handler_tables_hash)) if (! hash_inited(&thd->handler_tables_hash))
{ {
/* /*