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Editorial Team
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Asked: 2026-05-25T02:09:27+00:00

How to parse such a query to sql?.. or Do you know any open

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How to parse such a query to sql?.. or
Do you know any open source parsers which can parse it:

(((adsfa ≤ "value") AND (adsfa > "value")) OR (adsfa = "value")) 
AND (adsfa ≤ "value") OR ((adsfa ≤ "value") AND (adsfa ≤ "value")) 
AND (adsfa ≤ "value")

I’ve tried to build my own algorithm with string.Split(stringSeparators,StringSplitOptions.RemoveEmptyEntries)
algorithm is getting more and more complicated but i’m finding more combinations that it can’t parse.

  • adsfa is column name
  • ≤ is operator
  • “value” is value

UPDATED: Thank you all, may be I’ll use one of the parsers in the next version.

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1 Answer

  1. Editorial Team

    I developed something like this myself using the Irony library. It’s still in alpha, but has been stable for me so far. Note though that I used it to parse expressions that were written by other programmers, not user input.

    Here’s another idea – if you trust the source of the query, and just need to convert it to proper SQL, maybe a few simple string.Replace() would be enough? It’s practically SQL already, just the operators are weird characters.

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