LAG Function is slow when using ignore nulls (Doc ID 2811596.1)

Last updated on JULY 20, 2024

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 and later
Information in this document applies to any platform.

Using a similar SQL will be extremely slow taking hours to execute with LAG function and using ignore nulls.

select lag (CUST_MIDDLE_NAME,1) IGNORE NULLS OVER (PARTITION BY H_FAR_ID order by H_FAR_ID,CUST_MIDDLE_NAME) as lag_middlename from ET5379.TAB_HANG;

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