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Bug#55222 - RB://517 - Approved by Sunny

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InnoDB does not attempt to handle lower_case_table_names == 2 when looking
up foreign table names and referenced table name.  It turned that server
variable into a boolean and ignored the possibility of it being '2'.  

The setting lower_case_table_names == 2 means that it should be stored and
displayed in mixed case as given, but compared internally in lower case.
Normally the server deals with this since it stores table names.  But
InnoDB stores referential constraints for the server, so it needs to keep
track of both lower case and given names.

This solution creates two table name pointers for each foreign and referenced
table name.  One to display the name, and one to look it up.  Both pointers
point to the same allocated string unless this setting is 2.  So the overhead
added is not too much.

Two functions are created in dict0mem.c to populate the ..._lookup versions
of these pointers.  Both dict_mem_foreign_table_name_lookup_set() and
dict_mem_referenced_table_name_lookup_set() are called 5 times each.
This commit is contained in:
kevin.lewis@oracle.com
2010-11-30 12:25:52 -06:00
parent a2cd4e18f6
commit a53845ca45
14 changed files with 331 additions and 75 deletions
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22
mysql-test/suite/innodb/t/innodb_bug57904.test
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@@ -3,19 +3,19 @@
#
-- source include/have_innodb.inc
CREATE TABLE product (category INT NOT NULL, id INT NOT NULL,
CREATE TABLE product (category INT NOT NULL, id INT NOT NULL,
price DECIMAL, PRIMARY KEY(category, id)) ENGINE=INNODB;
CREATE TABLE customer (id INT NOT NULL, PRIMARY KEY (id)) ENGINE=INNODB;
CREATE TABLE product_order (no INT NOT NULL AUTO_INCREMENT,
product_category INT NOT NULL,
product_id INT NOT NULL,
customer_id INT NOT NULL,
PRIMARY KEY(no),
INDEX (product_category, product_id),
FOREIGN KEY (product_category, product_id)
REFERENCES product(category, id) ON UPDATE CASCADE ON DELETE RESTRICT,
INDEX (customer_id),
FOREIGN KEY (customer_id)
CREATE TABLE product_order (no INT NOT NULL AUTO_INCREMENT,
product_category INT NOT NULL,
product_id INT NOT NULL,
customer_id INT NOT NULL,
PRIMARY KEY(no),
INDEX (product_category, product_id),
FOREIGN KEY (product_category, product_id)
REFERENCES product(category, id) ON UPDATE CASCADE ON DELETE RESTRICT,
INDEX (customer_id),
FOREIGN KEY (customer_id)
REFERENCES customer(id)
) ENGINE=INNODB;