休眠性能问题：查询执行速度极慢

Question

The following hibernate query is being used to fetch a list of ProductCatalogue records, by passing in catId and inventoryId

select prodcat from ProductCatalogue prodcat where prodcat.prodSec.prodId=:catId and prodcat.prodPlacedOrder.inventoryId=:inventoryId

The tables ProductCatalogue and ProdPlacedOrder are tables with 3 lakh + records. inventoryId is a column in prodOrder table, and prodPlacedOrder extends prodOrder table.

This query on execution takes a lot of time, and the single hibernate query shoots off many complex sql queries.

Any suggestions on what might be the issue and how to modify it such that the query is executed faster?

Answer 1

Difficult to say without more info but try making ProdPlacedOrder as LAZY fetch if you dont need any data from that table.

Also as phatmanace, mentioned - check your indices.