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Bug#18282 "INFORMATION_SCHEMA.TABLES provides inconsistent info about invalid views" This bug caused crashes or resulted in wrong data being returned when one tried to obtain information from I_S tables about views using stored functions. It was caused by the fact that we were using LEX representing statement which were doing select from I_S tables as active LEX when contents of I_S table were built. So state of this LEX both affected and was affected by open_tables() calls which happened during this process. This resulted in wrong behavior and in violations of some of invariants which caused crashes. This fix tries to solve this problem by properly saving/resetting and restoring part of LEX which affects and is affected by the process of opening tables and views in get_all_tables() routine. To simplify things we separated this part of LEX in a new class and made LEX its descendant.
100 lines
2.8 KiB
Text
100 lines
2.8 KiB
Text
-- source include/testdb_only.inc
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--disable_warnings
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drop table if exists t1,t2;
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drop view if exists v1,v2;
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drop function if exists f1;
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drop function if exists f2;
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--enable_warnings
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use INFORMATION_SCHEMA;
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--replace_result Tables_in_INFORMATION_SCHEMA Tables_in_information_schema
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show tables;
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--replace_result 'Tables_in_INFORMATION_SCHEMA (T%)' 'Tables_in_information_schema (T%)'
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show tables from INFORMATION_SCHEMA like 'T%';
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create database `inf%`;
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create database mbase;
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use `inf%`;
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show tables;
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#
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# Bug#18113 SELECT * FROM information_schema.xxx crashes server
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# Bug#17204 second CALL to procedure crashes Server
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# Crash happened when one selected data from one of INFORMATION_SCHEMA
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# tables and in order to build its contents server had to open view which
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# used stored function and table or view on which one had not global or
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# database-level privileges (e.g. had only table-level or had no
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# privileges at all).
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#
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grant all privileges on `inf%`.* to 'mysqltest_1'@'localhost';
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grant all privileges on `mbase`.* to 'mysqltest_1'@'localhost';
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create table t1 (f1 int);
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delimiter |;
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create function func1(curr_int int) returns int
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begin
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declare ret_val int;
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select max(f1) from t1 into ret_val;
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return ret_val;
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end|
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delimiter ;|
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create view v1 as select f1 from t1 where f1 = func1(f1);
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create function func2() returns int return 1;
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use mbase;
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delimiter |;
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create procedure p1 ()
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begin
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select table_name from information_schema.key_column_usage
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order by table_name;
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end|
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delimiter ;|
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create table t1
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(f1 int(10) unsigned not null,
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f2 varchar(100) not null,
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primary key (f1), unique key (f2));
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connect (user1,localhost,mysqltest_1,,);
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connection user1;
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--disable_result_log
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select * from information_schema.tables;
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call mbase.p1();
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call mbase.p1();
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call mbase.p1();
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--enable_result_log
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connection default;
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use `inf%`;
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drop user mysqltest_1@localhost;
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drop table t1;
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select table_name, table_type, table_comment from information_schema.tables
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where table_schema='inf%' and func2();
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select table_name, table_type, table_comment from information_schema.tables
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where table_schema='inf%' and func2();
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drop view v1;
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drop function func1;
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drop function func2;
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drop database `inf%`;
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drop procedure mbase.p1;
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drop database mbase;
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#
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# Bug#18282 INFORMATION_SCHEMA.TABLES provides inconsistent info about invalid views
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#
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use test;
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create table t1 (i int);
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create function f1 () returns int return (select max(i) from t1);
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create view v1 as select f1();
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create table t2 (id int);
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create function f2 () returns int return (select max(i) from t2);
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create view v2 as select f2();
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drop table t2;
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select table_name, table_type, table_comment from information_schema.tables
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where table_schema='test';
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drop table t1;
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select table_name, table_type, table_comment from information_schema.tables
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where table_schema='test';
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drop function f1;
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drop function f2;
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drop view v1, v2;
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