Fix Product Flat Data index process unknown error in Magento

A client mentioned that he kept having to reindex the Product Flat Data but the notification in the admin section never went away. While trying to reindex from command line I was greeted with the following error:

Product Flat Data index process unknown error:

exception 'PDOException' with message 'SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`koopjedeal`.`#sql-1606_faff0b`, CONSTRAINT `FK_CAT_PRD_FLAT_1_ENTT_ID_CAT_PRD_ENTT_ENTT_ID` FOREIGN KEY (`entity_id`) REFERENCES `catalog_product_entity` (`entity_id`) ON DELETE CASCADE ON UP)' in /var/www/koopjedeal/lib/Zend/Db/Statement/Pdo.php:228

Stack trace:

#0 /var/www/koopjedeal/lib/Zend/Db/Statement/Pdo.php(228): PDOStatement->execute(Array)

#1 /var/www/koopjedeal/lib/Varien/Db/Statement/Pdo/Mysql.php(110): Zend_Db_Statement_Pdo->_execute(Array)

#2 /var/www/koopjedeal/app/code/core/Zend/Db/Statement.php(291): Varien_Db_Statement_Pdo_Mysql->_execute(Array)

#3 /var/www/koopjedeal/lib/Zend/Db/Adapter/Abstract.php(480): Zend_Db_Statement->execute(Array)

#4 /var/www/koopjedeal/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('ALTER TABLE `ca...', Array)

#5 /var/www/koopjedeal/lib/Varien/Db/Adapter/Pdo/Mysql.php(428): Zend_Db_Adapter_Pdo_Abstract->query('ALTER TABLE `ca...', Array)

#6 /var/www/koopjedeal/lib/Varien/Db/Adapter/Pdo/Mysql.php(347): Varien_Db_Adapter_Pdo_Mysql->query('ALTER TABLE `ca...')

#7 /var/www/koopjedeal/lib/Varien/Db/Adapter/Pdo/Mysql.php(2731): Varien_Db_Adapter_Pdo_Mysql->raw_query('ALTER TABLE `ca...')

#8 /var/www/koopjedeal/app/code/core/Mage/Catalog/Model/Resource/Product/Flat/Indexer.php(815): Varien_Db_Adapter_Pdo_Mysql->addForeignKey('FK_CAT_PRD_FLAT...', 'catalog_product...', 'entity_id', 'catalog_product...', 'entity_id', 'CASCADE', 'CASCADE')

#9 /var/www/koopjedeal/app/code/core/Mage/Catalog/Model/Resource/Product/Flat/Indexer.php(1389): Mage_Catalog_Model_Resource_Product_Flat_Indexer->prepareFlatTable(1)

#10 /var/www/koopjedeal/app/code/core/Mage/Catalog/Model/Product/Flat/Indexer.php(296): Mage_Catalog_Model_Resource_Product_Flat_Indexer->reindexAll()

#11 /var/www/koopjedeal/app/code/core/Mage/Catalog/Model/Product/Indexer/Flat.php(350): Mage_Catalog_Model_Product_Flat_Indexer->reindexAll()

#12 /var/www/koopjedeal/app/code/core/Mage/Index/Model/Process.php(212): Mage_Catalog_Model_Product_Indexer_Flat->reindexAll()

#13 /var/www/koopjedeal/app/code/core/Mage/Index/Model/Process.php(260): Mage_Index_Model_Process->reindexAll()

#14 /var/www/koopjedeal/shell/indexer.php(167): Mage_Index_Model_Process->reindexEverything()

#15 /var/www/koopjedeal/shell/indexer.php(215): Mage_Shell_Compiler->run()

#16 {main}

Turns out this problem was caused by products which were deleted but still existed in the product flat data table. To find these products you can run this query:

SELECT pf1.entity_id

FROM catalog_product_flat_1 pf1

LEFT JOIN catalog_product_entity p ON pf1.entity_id = p.entity_id

WHERE ISNULL( p.entity_id )

In this case it was nearly 80 products! To fix it you can just delete them with this query:

DELETE pf1.*

FROM catalog_product_flat_1 pf1

LEFT JOIN catalog_product_entity p ON pf1.entity_id = p.entity_id

WHERE ISNULL( p.entity_id )

Revisions

August 25, 2015 @ 18:52:09 [Current Revision] by admin
August 25, 2015 @ 18:52:09 by admin

Revision Differences

There are no differences between the August 25, 2015 @ 18:52:09 revision and the current revision. (Maybe only post meta information was changed.)

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