[processor/redaction] Support redacting values based on a parser

[atoulme]

Component(s)

processor/redaction

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

The current redaction processor uses a regular expression to identify values to redact. Regular expressions may not catch well specific values to redact in a structured document or string.

Describe the solution you'd like

We want to support a lexer and parser approach that will identify portions of a query to redact.

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners:

• processor/redaction: @dmitryax @mx-psi @TylerHelmuth

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[mx-psi]

@atoulme How would the parser and lexer be implemented?

[atoulme]

I would reuse an existing library such as https://github.com/krasun/gosqlparser

[TylerHelmuth]

Do you have an existing use case in mind that regex cannot handle? This feels like more complexity than this processor should undertake.

[mx-psi]

@atoulme That solves the specific case of SQL. Is this issue only about SQL or are we thinking about the user passing an arbitrary parser?