[metric]Rename column name with non-english string

Is your feature request related to a problem? Please describe.

Hi, I am really enjoying superset, but I am frustrated when I have to rename column with non-english string. Because if I try to change the column name in Korean (for example metrics column), then generated sql query contains Korean with AS statement. Therefore, BigQuery engine is broken.

Describe the solution you’d like I would like to manually assign column names of group by and metrics with any-language string, through the chart explore ui.

Since bigquery column name rule does not allows non-english character, I think a field name variable should be prepared separately from the column name in SQL query.

Describe alternatives you’ve considered A clear and concise description of any alternative solutions or features you’ve considered.

Additional context Add any other context or screenshots about the feature request here.

Following images is error message when I assign ‘날짜’ string to one of the metrics column.

[zhaoyongjie]

we will consider this issue in metric refactor project. cc: @junlincc

[zertyuiop]

Same issue: https://github.com/apache/superset/issues/3136