base64 decode for column, like mysql FROM_BASE64(str)

[xiaoyang-chen]

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dear tdengine team:
i find base64 function in this repo,
https://github.com/search?q=repo%3Ataosdata%2FTDengine%20base64&type=code
is there a function like mysql FROM_BASE64(str) that i can use select FROM_BASE64('${column_value}') from ${table_name} in tdengine