[WIP] parser: support select into syntax #645
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What problem does this PR solve?
support select into syntax
related PR: pingcap/tidb#13603
What is changed and how it works?
Most of the code are written during the Hackathon, so it may be messy.
We have implemented:
The parser handled some cases of the usage of the select-into with union and subquery statements, it's not completed. sorry, but, fix me please.
Check List
Tests