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Fixed bug #27695.

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Declaring an all space column name in the SELECT FROM DUAL or in a view
leads to misleading warning message:
"Leading spaces are removed from name ' '".

The Item::set_name method has been modified to raise warnings like
"Name ' ' has become ''" in case of the truncation of an all
space identifier to an empty string identifier instead of the
"Leading spaces are removed from name ' '" warning message.
This commit is contained in:
gshchepa/uchum@gleb.loc
2007-09-13 18:41:50 +05:00
parent a8c7e45067
commit e4eadcfbdd
4 changed files with 66 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
mysql-test/r/select.result
View File

@ -4062,4 +4062,38 @@ SHOW WARNINGS;
Level Code Message
Note 1003 select '0' AS `c1` from `test`.`t1` `join_0` join `test`.`t1` `join_1` join `test`.`t1` `join_2` join `test`.`t1` `join_3` join `test`.`t1` `join_4` join `test`.`t1` `join_5` join `test`.`t1` `join_6` join `test`.`t1` `join_7` where 0 group by '0','0','0','0','0'
DROP TABLE t1;
SELECT 1 AS ` `;
1
Warnings:
Warning 1474 Name ' ' has become ''
SELECT 1 AS ` `;
1
Warnings:
Warning 1474 Name ' ' has become ''
SELECT 1 AS ` x`;
x
1
Warnings:
Warning 1466 Leading spaces are removed from name ' x'
CREATE VIEW v1 AS SELECT 1 AS ` `;
Warnings:
Warning 1474 Name ' ' has become ''
SELECT `` FROM v1;
1
CREATE VIEW v2 AS SELECT 1 AS ` `;
Warnings:
Warning 1474 Name ' ' has become ''
SELECT `` FROM v2;
1
CREATE VIEW v3 AS SELECT 1 AS ` x`;
Warnings:
Warning 1466 Leading spaces are removed from name ' x'
SELECT `x` FROM v3;
x
1
DROP VIEW v1, v2, v3;
End of 5.0 tests

20
mysql-test/t/select.test
View File

@ -3460,4 +3460,24 @@ SHOW WARNINGS;
DROP TABLE t1;
#
# Bug #27695: Misleading warning when declaring all space column names and
# truncation of one-space column names to zero length names.
#
SELECT 1 AS ` `;
SELECT 1 AS ` `;
SELECT 1 AS ` x`;
CREATE VIEW v1 AS SELECT 1 AS ` `;
SELECT `` FROM v1;
CREATE VIEW v2 AS SELECT 1 AS ` `;
SELECT `` FROM v2;
CREATE VIEW v3 AS SELECT 1 AS ` x`;
SELECT `x` FROM v3;
DROP VIEW v1, v2, v3;
--echo End of 5.0 tests