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Bug#29223 declare cursor c for SHOW .....

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"DECLARE CURSOR FOR SHOW ..." is a syntax that currently appears to work,
but is untested for some SHOW commands and does not work for other SHOW
commands.

Since this is an un-intended feature that leaked as a result of a coding bug
(in the parser grammar), the correct fix is to fix the grammar to not accept
this construct.

In other words, "DECLARE CURSOR FOR SHOW <other commands that don't work>"
is not considered a bug, and we will not implement other features to make all
the SHOW commands usable inside a cursor just because someone exploited a bug.
This commit is contained in:
davi@moksha.com.br
2007-10-11 17:38:40 -03:00
parent 7237c31698
commit 2adf38c12e
4 changed files with 46 additions and 18 deletions
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2
mysql-test/t/information_schema.test
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@@ -953,7 +953,7 @@ BEGIN
DECLARE col1, col2, col3, col4, col6 CHAR(255);
DECLARE default_val VARCHAR(65532);
DECLARE done INT DEFAULT 0;
DECLARE cur1 CURSOR FOR SHOW COLUMNS FROM bug23037;
DECLARE cur1 CURSOR FOR SELECT COLUMN_NAME, COLUMN_TYPE, IS_NULLABLE, COLUMN_KEY, COLUMN_DEFAULT, EXTRA FROM INFORMATION_SCHEMA.COLUMNS where TABLE_NAME='bug23037';
DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;
OPEN cur1;
FETCH cur1 INTO col1, col2, col3, col4, default_val, col6;