So, here’s a question that will probably have the SQL experts jumping all over me calling me lazy, but I’m stumped. Our online store crashed and burned this morning, and here is the suspect query. I’ve thought about this all day, and haven’t come up with any genius optimizations. Can I get some help? Any crucial indexes? Ways to restructure this? I realize this is like asking what’s on the other side of the wall and then giving you a telescope pointed the other direction, but figured it was worth a shot:
SELECT DISTINCT (SELECT filename FROM (SELECT DISTINCT y.value AS label, x.value AS filename
FROM `catalog_product_super_link` AS z
INNER JOIN `catalog_product_entity_varchar` AS y
ON z.product_id = y.entity_id
INNER JOIN `catalog_product_entity_varchar` AS x
ON z.product_id = x.entity_id
WHERE parent_id = (SELECT entity_id
FROM `catalog_product_entity`
WHERE sku LIKE 'F11-ARC-7710%'
LIMIT 0, 1)
AND y.attribute_id = (SELECT attribute_id
FROM `eav_attribute`
WHERE attribute_code = 'image_label'
AND entity_type_id = (SELECT entity_type_id FROM `eav_entity_type` WHERE entity_type_code = 'catalog_product') LIMIT 0, 1)
AND x.attribute_id = (SELECT attribute_id
FROM `eav_attribute`
WHERE attribute_code = 'image'
AND entity_type_id = (SELECT entity_type_id FROM `eav_entity_type` WHERE entity_type_code = 'catalog_product'))) AS images WHERE c.value LIKE CONCAT(label,'%') LIMIT 0, 1) AS image,
pricing_value,
is_percent,
value_index,
c.value AS label,
d.sort_order AS sort_order
FROM `catalog_product_super_attribute_pricing` AS a
INNER JOIN `catalog_product_super_attribute_label` AS b
ON a.product_super_attribute_id = b.product_super_attribute_id
INNER JOIN `eav_attribute_option_value` AS c
ON value_index = c.option_id
INNER JOIN `eav_attribute_option` AS d
ON c.option_id = d.option_id
WHERE a.product_super_attribute_id = (SELECT product_super_attribute_id
FROM `catalog_product_super_attribute`
WHERE product_id = 5928
AND attribute_id = 143 LIMIT 0, 1)
UNION ALL
SELECT DISTINCT (SELECT filename FROM (SELECT DISTINCT y.value AS label, x.value AS filename
FROM `catalog_product_super_link` AS z
INNER JOIN `catalog_product_entity_varchar` AS y
ON z.product_id = y.entity_id
INNER JOIN `catalog_product_entity_varchar` AS x
ON z.product_id = x.entity_id
WHERE parent_id = (SELECT entity_id
FROM `catalog_product_entity`
WHERE sku LIKE 'F11-ARC-7710%'
LIMIT 0, 1)
AND y.attribute_id = (SELECT attribute_id
FROM `eav_attribute`
WHERE attribute_code = 'image_label'
AND entity_type_id = (SELECT entity_type_id FROM `eav_entity_type` WHERE entity_type_code = 'catalog_product') LIMIT 0, 1)
AND x.attribute_id = (SELECT attribute_id
FROM `eav_attribute`
WHERE attribute_code = 'image'
AND entity_type_id = (SELECT entity_type_id FROM `eav_entity_type` WHERE entity_type_code = 'catalog_product'))) AS images
WHERE label LIKE CONCAT((SELECT value FROM `eav_attribute_option_value` WHERE option_id = c.value LIMIT 0, 1),'%') LIMIT 0, 1) AS image,
0 AS pricing_value,
0 AS is_percent,
c.value AS value_index,
(SELECT value FROM `eav_attribute_option_value` WHERE option_id = c.value LIMIT 0, 1) AS label,
(SELECT sort_order FROM `eav_attribute_option` WHERE option_id = c.value LIMIT 0, 1) AS sort_order
FROM `catalog_product_entity` AS a
INNER JOIN `cataloginventory_stock_status` AS b
ON a.entity_id = b.product_id
INNER JOIN `catalog_product_entity_int` AS c
ON a.entity_id = c.entity_id
INNER JOIN `cataloginventory_stock_item` AS d
ON a.entity_id = d.product_id
WHERE c.attribute_id = (SELECT attribute_id
FROM `eav_attribute`
WHERE attribute_code = 'choose_size'
AND entity_type_id = (SELECT entity_type_id FROM `eav_entity_type` WHERE entity_type_code = 'catalog_product') LIMIT 0, 1)
AND a.entity_id IN (SELECT DISTINCT product_id
FROM `catalog_product_super_link`
WHERE parent_id = (SELECT entity_id FROM `catalog_product_entity` WHERE sku LIKE 'F11-ARC-7710%' LIMIT 0, 1))
AND (b.qty > 0 OR d.manage_stock = 0)
AND (SELECT value
FROM `eav_attribute_option_value`
WHERE option_id = c.value
LIMIT 0, 1) NOT IN (SELECT c.value
FROM `catalog_product_super_attribute_pricing` AS a
INNER JOIN `catalog_product_super_attribute_label` AS b ON a.product_super_attribute_id = b.product_super_attribute_id
INNER JOIN `eav_attribute_option_value` AS c ON value_index = c.option_id
WHERE a.product_super_attribute_id = (SELECT product_super_attribute_id FROM `catalog_product_super_attribute`
WHERE product_id = 5928
AND attribute_id = 143))
ORDER BY sort_order
Thanks in advance!
A quick response.
Can you do it in the equivilent of PLSQL?
Can you eliminate those subqueries?
Do them first and store the results.
Assuming that they return a single row.
Then, write a smaller query passing in the variables.