feat(query): Add optional column names to create/alter view statement

[johnhaxx7]

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Summary

Add optional column names to create/alter view statement

CREATE VIEW [IF NOT EXISTS] [db.]view_name [(<column>, ...)] AS SELECT query
ALTER VIEW [db.]view_name [(<column>, ...)] AS SELECT query

so that column names can be renamed.

If column names is not empty, the subquery is rewrote to

select * from ({subquery}) {viewname}( names ) 

When we select/describe from the view, it'll parse from the new subquery to ensure we get the right column names.

Thanks to @sundy-li for the idea!

Closes #6854

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1 Ignored Deployment

Name	Status	Preview	Comments	Updated
databend	⬜️ Ignored (Inspect)			Jan 25, 2023 at 4:29AM (UTC)

[johnhaxx7]

Hi @BohuTANG , seems like I don't have access to merge, can you please help if possible? thanks!