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Performance Issue After Joining EGO_ITEM_EFF_B on the basis of CHANGE_LINE_ID. Any solutions?

Hi,

I’m working on a query that previously ran within seconds, but after adding the lastLEFT JOIN, the execution time has increased significantly—even for a single change order, it now takes around 2 minutes. The purpose of the join is to retrieve the redlined value for a specific attribute tied to a particular change order, which is why I’m joining on CHANGE_LINE_ID. However, this addition has impacted performance quite a bit.

Could you help me understand why this join might be causing the slowdown, and suggest any optimization approaches? I need this query to run much faster for use in an automation process. Here is the code:

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