Avoid OOM when reads information_schema.columns

[wjhuang2016]

Bug Report

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1. Minimal reproduce step (Required)

See also https://asktug.com/t/topic/34457
If there are too many tables in the database, the memory usage is very high and it's easy to cause OOM.

[fzhedu]

see #17200
#16572

[SunRunAway]

It's neither related to #17200 nor #16572.

We could have a good implementation of the memory table information_schema.columns to avoid OOM.