Rule Definition
Having complex queries in Functions can cause performance problems.
The optimizer does not evaluate all the permutations that would be required to determine the best access plan. Thus the query is likely to be inefficient.
Remediation
Review the query to reduce the number of involved Tables.
Related Technologies
Technical Criterion
Efficiency - SQL and Data Handling Performance
About CAST Appmarq
CAST Appmarq is by far the biggest repository of data about real IT systems. It's built on thousands of analyzed applications, made of 35 different technologies, by over 300 business organizations across major verticals. It provides IT Leaders with factual key analytics to let them know if their applications are on track.