how to disable some features?

[tulequ]

my usecase is not need to support all operations, I only want to allow lightweight operation

Example:

• Disable SCAN ALL functions: COUNT(*), MIN, MAX, ...
• Maybe force LIMIT <n>
• Disable join
• ...

How I can do it? is there any prehook call for self validate query?

[kylebrandt]

You might find the following helpful https://github.com/grafana/grafana/blob/main/pkg/expr/sql/parser_allow.go , using GMS as a dependency here, and use the parser to only allow certain functions and notes through.