what is OLAP_SCAN_OPERATOR_DEPENDENCY?

[tigerfsh]

Path:/zh-CN/docs/query-acceleration/performance-tuning-overview/analysis-tools

The explanation of profile parameters is not comprehensive enough, and some content cannot be found at all, such as OLAP_SCAN_OPERATOR_DEPENDENCY, no details about it.

for example, I got this message as followed, but I don't know what specific dependencies are included.