Github user wzhfy commented on the issue:
https://github.com/apache/spark/pull/16401
If our goal is to fix two sets of stats issue first, is it ok to just use
two `lazy val`s now, and leave the configuration and cache invalidation issues
in the future? In current implementation, we don't need any configurations
except the cbo switch conf.
```
def statistics(conf: CatalystConf): Statistics = {
if (conf.cboEnabled) cboStats else basicStats
}
lazy val cboStats...
lazy val basicStats...
```
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