planner: forbiden nested view creation (#15420)#15424

Merged

zz-jason merged 3 commits intopingcap:release-3.0from sre-bot:release-3.0-0c5e58107dad

Mar 26, 2020

+25

Commits on Mar 17, 2020

cherry pick pingcap#15420 to release-3.0

XuHuaiyu
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resolve conflicts
XuHuaiyu
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Commits on Mar 26, 2020

Merge branch 'release-3.0' into release-3.0-0c5e58107dad
sre-bot
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