tidb没有tidb_enable_paging变量是什么原因？

🪐 TiDB 技术问题
7

6.1该字段还是隐藏状态，6.2后就可以看到了。
处于隐藏状态的变量可以设置，但是你看不到。
https://github.com/pingcap/tidb/blob/73d82e330b02a39f74073d98daefbadd7deab9b9/sessionctx/variable/sysvar.go#L1500C98-L1500C102
Hidden: true

{Scope: ScopeGlobal | ScopeSession, Name: TiDBEnablePaging, Value: BoolToOnOff(DefTiDBEnablePaging), Type: TypeBool, Hidden: true, SetSession: func(s *SessionVars, val string) error {
		s.EnablePaging = TiDBOptOn(val)
		return nil
	}

这个PR是remove掉Hidden关键字了，后面没这种情况了。
https://github.com/pingcap/tidb/pull/35740

	// Deprecated: Hidden previously meant that the variable still responds to SET but doesn't show up in SHOW VARIABLES
	// However, this feature is no longer used. All variables are visble.
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