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Fix for bug#9383: INFORMATION_SCHEMA.COLUMNS, JOIN, Crash, prepared statement

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restore original 'lex->query_tables' table list after
   processing of information schema table
   remove unnecessary operations


mysql-test/r/ps.result:
  Fix for bug#9383: INFORMATION_SCHEMA.COLUMNS, JOIN, Crash, prepared statement
mysql-test/t/ps.test:
  Fix for bug#9383: INFORMATION_SCHEMA.COLUMNS, JOIN, Crash, prepared statement
sql/sql_lex.h:
  Fix for bug#9383: INFORMATION_SCHEMA.COLUMNS, JOIN, Crash, prepared statement
sql/sql_show.cc:
  Fix for bug#9383: INFORMATION_SCHEMA.COLUMNS, JOIN, Crash, prepared statement
This commit is contained in:
unknown
2005-04-05 16:09:56 +05:00
parent 4963a9c853
commit b419262fe4
4 changed files with 44 additions and 5 deletions
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18
mysql-test/r/ps.result
View File

@ -524,3 +524,21 @@ execute stmt using @a, @b, @c;
a b c a b c
deallocate prepare stmt;
drop table t1,t2;
SET @aux= "SELECT COUNT(*)
FROM INFORMATION_SCHEMA.COLUMNS A,
INFORMATION_SCHEMA.COLUMNS B
WHERE A.TABLE_SCHEMA = B.TABLE_SCHEMA
AND A.TABLE_NAME = B.TABLE_NAME
AND A.COLUMN_NAME = B.COLUMN_NAME AND
A.TABLE_NAME = 'user'";
prepare my_stmt from @aux;
execute my_stmt;
COUNT(*)
37
execute my_stmt;
COUNT(*)
37
execute my_stmt;
COUNT(*)
37
deallocate prepare my_stmt;

21
mysql-test/t/ps.test
View File

@ -540,3 +540,24 @@ deallocate prepare stmt;
drop table t1,t2;
#
# Bug#9383: INFORMATION_SCHEMA.COLUMNS, JOIN, Crash, prepared statement
#
eval SET @aux= "SELECT COUNT(*)
FROM INFORMATION_SCHEMA.COLUMNS A,
INFORMATION_SCHEMA.COLUMNS B
WHERE A.TABLE_SCHEMA = B.TABLE_SCHEMA
AND A.TABLE_NAME = B.TABLE_NAME
AND A.COLUMN_NAME = B.COLUMN_NAME AND
A.TABLE_NAME = 'user'";
let $exec_loop_count= 3;
eval prepare my_stmt from @aux;
while ($exec_loop_count)
{
eval execute my_stmt;
dec $exec_loop_count;
}
deallocate prepare my_stmt;