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Setting a variable to CAST(NULL as X) set the result type of the variable to X. (Bug #6598)

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mysql-test/r/bigint.result:
  Test to show show that the parser threats big longlong values as unsigned
mysql-test/r/user_var.result:
  Test of CAST(NULL as SIGNED/UNSIGNED)
mysql-test/t/bigint.test:
  Test to show show that the parser threats big longlong values as unsigned
mysql-test/t/user_var.test:
  Test of CAST(NULL as SIGNED/UNSIGNED)
sql/item_func.cc:
  Setting a variable to CAST(NULL as X) set the result type of the variable to X. (Bug #6598)
  Setting a variable to NULL doesn't change the old result type.
sql/item_func.h:
  Detect setting a variable to NULL
sql/unireg.cc:
  Safety fix
This commit is contained in:
unknown
2005-04-30 03:14:42 +03:00
parent 8b5b3652ec
commit ac82a2d5eb
7 changed files with 111 additions and 6 deletions
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41
mysql-test/r/user_var.result
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@ -182,3 +182,44 @@ coercibility(@v1) coercibility(@v2) coercibility(@v3) coercibility(@v4)
set session @honk=99;
set one_shot @honk=99;
ERROR HY000: The 'SET ONE_SHOT' syntax is reserved for purposes internal to the MySQL server
set @first_var= NULL;
create table t1 select @first_var;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`@first_var` longblob
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
set @first_var= cast(NULL as signed integer);
create table t1 select @first_var;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`@first_var` bigint(20) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
set @first_var= NULL;
create table t1 select @first_var;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`@first_var` bigint(20) default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
set @first_var= concat(NULL);
create table t1 select @first_var;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`@first_var` longblob
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
set @first_var=1;
set @first_var= cast(NULL as CHAR);
create table t1 select @first_var;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`@first_var` longtext
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;