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Message #03513
[Bug 1285365] Re: Bug query optimizer when multiple conditions are included in ON section
I am not able to reproduce it with test data i used. Can you please provide some data for the involved tables to recheck it.
Below is in details.
mysql [localhost] {msandbox} (test) > SHOW VARIABLES LIKE '%version%';
+-------------------------+-----------------------------------------------------------------+
| Variable_name | Value |
+-------------------------+-----------------------------------------------------------------+
| innodb_version | 5.6.15-rel63.0 |
| protocol_version | 10 |
| slave_type_conversions | |
| version | 5.6.15-rel63.0 |
| version_comment | Percona Server with XtraDB (GPL), Release rel63.0, Revision 519 |
| version_compile_machine | x86_64 |
| version_compile_os | Linux |
+-------------------------+-----------------------------------------------------------------+
mysql> EXPLAIN SELECT `main_table`.`entity_id`, main_table.`name`, main_table.`path`, `main_table`.`is_active`, `main_table`.`is_anchor`, `url_rewrite`.`request_path` FROM `catalog_category_flat_store_1` AS `main_table`
LEFT JOIN `core_url_rewrite` AS `url_rewrite` ON url_rewrite.category_id=main_table.entity_id
AND url_rewrite.is_system=1
AND url_rewrite.product_id IS NULL
AND url_rewrite.store_id='1'
AND url_rewrite.id_path LIKE 'category/%'
WHERE (main_table.is_active = '1')
AND (main_table.include_in_menu = '1')
AND (main_table.path like '1/3/%')
AND (`level` <= 4)
ORDER BY `main_table`.`position` ASC\G
*************************** 1. row ***************************
id: 1
select_type: SIMPLE
table: main_table
type: range
possible_keys: IDX_CATALOG_CATEGORY_FLAT_STORE_1_PATH,IDX_CATALOG_CATEGORY_FLAT_STORE_1_LEVEL
key: IDX_CATALOG_CATEGORY_FLAT_STORE_1_PATH
key_len: 767
ref: NULL
rows: 1
Extra: Using index condition; Using where; Using filesort
*************************** 2. row ***************************
id: 1
select_type: SIMPLE
table: url_rewrite
type: ref
possible_keys: UNQ_CORE_URL_REWRITE_ID_PATH_IS_SYSTEM_STORE_ID,IDX_CORE_URL_REWRITE_ID_PATH,IDX_CORE_URL_REWRITE_STORE_ID,FK_CORE_URL_REWRITE_PRODUCT_ID_CATALOG_PRODUCT_ENTITY_ENTITY_ID,FK_CORE_URL_REWRITE_CTGR_ID_CAT_CTGR_ENTT_ENTT_ID
key: IDX_CORE_URL_REWRITE_STORE_ID
key_len: 2
ref: const
rows: 1
Extra: Using where
2 rows in set (0.00 sec)
Execution: Empty set (0.00 sec)
mysql [localhost] {msandbox} (test) > show variables like '%version%';
+-------------------------+-----------------------------------------------------------------+
| Variable_name | Value |
+-------------------------+-----------------------------------------------------------------+
| innodb_version | 5.5.32-rel31.0 |
| protocol_version | 10 |
| slave_type_conversions | |
| version | 5.5.32-rel31.0 |
| version_comment | Percona Server with XtraDB (GPL), Release rel31.0, Revision 549 |
| version_compile_machine | x86_64 |
| version_compile_os | Linux |
+-------------------------+-----------------------------------------------------------------+
mysql> EXPLAIN SELECT `main_table`.`entity_id`, main_table.`name`, main_table.`path`, `main_table`.`is_active`, `main_table`.`is_anchor`, `url_rewrite`.`request_path` FROM `catalog_category_flat_store_1` AS `main_table`
LEFT JOIN `core_url_rewrite` AS `url_rewrite` ON url_rewrite.category_id=main_table.entity_id
AND url_rewrite.is_system=1
AND url_rewrite.product_id IS NULL
AND url_rewrite.store_id='1'
AND url_rewrite.id_path LIKE 'category/%'
WHERE (main_table.is_active = '1')
AND (main_table.include_in_menu = '1')
AND (main_table.path like '1/3/%')
AND (`level` <= 4)
ORDER BY `main_table`.`position` ASC\G
*************************** 1. row ***************************
id: 1
select_type: SIMPLE
table: main_table
type: range
possible_keys: IDX_CATALOG_CATEGORY_FLAT_STORE_1_PATH,IDX_CATALOG_CATEGORY_FLAT_STORE_1_LEVEL
key: IDX_CATALOG_CATEGORY_FLAT_STORE_1_PATH
key_len: 767
ref: NULL
rows: 1
Extra: Using where; Using filesort
*************************** 2. row ***************************
id: 1
select_type: SIMPLE
table: url_rewrite
type: ref
possible_keys: UNQ_CORE_URL_REWRITE_ID_PATH_IS_SYSTEM_STORE_ID,IDX_CORE_URL_REWRITE_ID_PATH,IDX_CORE_URL_REWRITE_STORE_ID,FK_CORE_URL_REWRITE_PRODUCT_ID_CATALOG_PRODUCT_ENTITY_ENTITY_ID,FK_CORE_URL_REWRITE_CTGR_ID_CAT_CTGR_ENTT_ENTT_ID
key: IDX_CORE_URL_REWRITE_STORE_ID
key_len: 2
ref: const
rows: 1
Extra:
2 rows in set (0.03 sec)
Execution: Empty set (0.00 sec)
** Changed in: percona-server/5.6
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1285365
Title:
Bug query optimizer when multiple conditions are included in ON
section
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